Questions Asked on
December 5, 2010

chemistry
lithium + gold(III) chloride +lithium chloride + gold need to balance equation
asked by jin 
Chemistry
What is the solubility equilibrium for Mn3(PO4)2? Isn't it this.. Mn3(PO4)2 (s) > 3Mn^+2 (aq) + 2PO4^3 (aq) but i keep getting it wrong. suggestions?
asked by Savannah S. 
Physics HELP!
A 650 N boy and a 490 N girl sit on a 150 N porch swing that is 1.70 m long. If the swing is supported by a chain at each end, what is the tension in each chain when the boy sits .75 m from one end and the girl .5 m from the other end?
asked by Jennifer 
Advanced Physics
If wind blows at a speed of 30 m/s over the roof of your house, what is the pressure diference on your roof between the air inside and the air outside? What net force does this produce on a roof having an area of 175 m^2? 1.3 kg/m^3 is the density of air.
asked by Katie 
Chemistry
describe how you would make a 2.5L of a .100M KCL solution from a 5.5M stock solution
asked by lily 
Chemistry
From the lewis structure of AlCl4 where should I place the formal charge? next to Al or Cl?
asked by Sarah 
Pre calculus
An observer 2 km from the launching pad observes a vertically ascending missile at an angle of elevation of 21 degrees. 5 seconds later the nagle has increased to 35 degrees. What was its average speed during this interval? If it keeps going vertically at
asked by H 
Physics
When a drag strip vehicle reaches a velocity of 60 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight line path is a constant 7.5 m/s2. What
asked by Jesse 
Chemistry
What is the electron domain for: a)CH3I b)ClF3 c)H2S d)SO3 e)SO4^2
asked by Sarah 
Chemistry
How many unpaired electrons are in the electron structure of 24 Cr, [Ar]4s1 3d5
asked by dody 
math
Convert to scientific notation: 0.000678
asked by estrella 
physics
A 0.280kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. a)what impulse is delivered to the ball by the
asked by Kim 
college Chemistry
Why was there condensation of the beaker of cold water when a blue flame was passes underneath? This experiment is from the Gas Burner experiment. A) the product of carbon dioxide from combustion (B) the product of hydrogen dioxide from combustion (C) left
asked by Ivy 
world history
How did movable type help the Chinese to record their knowledge in a permanent form?
asked by Alexis 
physics
hummingbird beats wings with frequency of 80.0 Hz. What is period of bird's flaps? I know T = 1/f , but what is the label/units for the answer?
asked by anonymous 
writing
i really need help of this writing assigment. i have been working on it for hours now and my brain is just jammed. okay .. the assigment is to Write an eight sentence paragraph that fully develops the topic of how drunk driving can be stoped. this is what
asked by Cas 
Chemistry
An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?
asked by MoMto2 
geometry
the area of a triangle is 147 square inches and its height is 1.5 times its base. find the base and the height of the trianle.
asked by michelle 
Chemistry
An aqueous mixture containing starch (a colloid), NaCl, glucose, and albumin (a colloid) is placed in a dialyzing bag and immersed in distilled water. Which of the following correctly describes the location of the indicated substance after dialysis?
asked by MoMto2 
Chemistry
Since BrF3 and ClF5 do not obey the octet rule. Did IF7 obey the octet rule? Yes or No?
asked by Sarah 
physics
What force is necessary for a person to hold a 50 kg mass over their head?
asked by machaila 
Chemistry
The melting point of aspirin : 128137Celsius degree. The melting point of the crude aspirin was measured to be 128 Celsius degree. What does it indicate about the purity of the product?
asked by Cynthia 
Physics
A vertical cylindrical cylinder, closed at the bottom end, contains 0.0100 moles of gas. It is fitted at the top with a piston, which can move freely. The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder
asked by Matt 
science
A 75kg person on skis is going down a hill sloped at 30.0°. The coefficient of kinetic friction between the skis and the snow is 0.15. How fast is the skier going 10.0 s after starting from rest?
asked by Bob 
math
Suppose two dice (one red, one green) are rolled. Consider the following events. A: the red die shows 5. B: the numbers add to 4. C: at least one of the numbers is 3. D: the numbers do not add to 10. Express the event "The numbers do not add to 4." in
asked by Liz 
Chemistry
Wen 4Ag + 2H2S + 02 > 2Ag2S + 2H20 and the reactants inclde 12 mol Ag, 6 mole of H2S and 96 G of 02 the limiting reactant is?
asked by dody 
statistics
Im am so lost.... A bank conducts a survey in which it randomly samples 400 of it customers. The survey asks the customers which way they use the bank the most, (1) interacting with teller, (2)atm use, (3) internet bank service. It was also asked their
asked by Kelly 
physics
A gymnast of mass 63.0 {\rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch.Calculate the tension T in the rope if the gymnast climbs up the rope with an upward
asked by Anonymous 
chemistry
How many grams of methane gas were used to fill a baloon to a volume of 3.0 L at STP?
asked by Naples 
physics
Density is calculated by dividing the mass of an object by its volume. The Sun has a mass of 1.99×1030 kg and a radius of 6.96×108 m. What is the average density of the Sun?
asked by amber gorman 
chemistry
Acetylsalicyclic Acid, HC9H704, is the active component is aspirin. Two extra strength aspirin tablets, each containing 500 mg of acetylsalicylic acid, are dissolved in 325 ml of water. What is the pH of the solution? (Assume Ka=3.3x10^4)
asked by Symone 
Physics
A 500 g block is released from rest and slides down a frictionless track that begins h = 1.70 m above the horizontal, as shown in Figure P13.56. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring
asked by Anonymous 
Chemistry
Use average bond energies to calculate delta Hrxn for C(s)+2H2O(g)>2H2(g)+CO2(g)
asked by Kate 
Physics
A bullet of mass 0.02kg is fired at a speed of 500m/s towards a fixed wooden block of thickness 10cm. The bullet penetrates the block and emerges with a speed of 200m/s. a) Find the average retarding force on the bullet when it is passing through the
asked by laura 
huckleberry finn
in the book huckleberry finn manys words are used that mean something like "to beat someone" for example to lick. i need to find 8 more of words that are used to mean "to beat" if you know any and the page number/chapter it is used in the book that would
asked by hannah 
to Anonymous, <3, and Thanks to all Jiskha Teacher
We do not allow students to be successful imposters of our tutors. You have been banned from posting for this reason. Perhaps in a few days, you'll be unbanned ... to see if you've learned acceptable online behavior. =(
asked by Writeacher 
science
A wagon with a weight of 300N is accelerated across a level surface at 0.5 m/s . What net force acts on the wagon
asked by BJ 
physics  speed of electron in magnetic field
A beam of electron is accelerated by a potential difference of 2.5okV. The electrons are then allowed to pass into a magnetic field of strength 10.0mT. As the electrons enter the field, the direction of the velocity is at right angles to the direction of
asked by Farah 
physics
What force is necessary for a person to hold a 50 kg mass over their head?
asked by machaila 
Chemistry
What volumes of 0.46 M HNO2 and 0.54 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.40? a) HNO2 b) NaNO2 answer in L
asked by justin 
Physics
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 50.0 kHz, and if the speed of sound in air is 340 m/s, what is the smallest insect a
asked by Josh 
stat
7. A researcher selects a random sample. A 90% confidence interval for a population mean A) is an interval with margin of error ± 90%. B) has the property that if we repeatedly selected our random sample in exactly the same way, each time constructing
asked by Anonymous 
Chemistry
Consider the following chemical equation. Cl2(g) + O2(g) → Cl2O3(g) Assuming all gases are at the same temperature and pressure, how many milliliters of oxygen gas must react to give 3.50 L of Cl2O3?
asked by Kalen 
Gen. Chemistry
What is the original molarity of a solution of weak acid whose Ka= 3.5 x 10^ 5 and pH is 5.20... I'm lost, please help!
asked by Savannah S. 
chemistry
water has a vapor pressure of 23.76 torr at 25C if 1.15 g H2O is enclosed in a 1.0 L container will any liquid be present if so what is the mass of the water?
asked by Anonymous 
physics
Figure 643 shows a "conical pendulum", in which the bob (the small object at the lower end of the cord) moves in a horizontal circle at constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.060 kg, the string has length
asked by :) 
physics
Three masses are arranged on a flat surface as shown. Two of the masses are as follows: m2 = 16.3 kg and m3 = 66.5 kg. A horizontal force of 519 N applied to m2 accelerates the masses across the floor, which has a coefficient of friction of μ = 0.312, at
asked by dillon 
Physics
An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire?
asked by Matt 
physics
A disk, with a radius of 0.25 m, is to be rotated like a merrygoround through 800 rad, starting from rest, gaining angular speed at the constant rate α1 through the first 400 rad and then losing angular speed at the constant rate α1 until it is again
asked by Meghan 
Pre Calc
Determine how many orders of magnitude the quantities differ. A canary weighing 20 g and a hen weighing 2 kg. I want to say 1 but I am not sure...
asked by Courtney 
General Physic
The time it takes for an object dropped from the top of cliff A to hit the water in the lake below is twice the time it takes for another object dropped from the top of cliff B to reach the lake. If it takes 2.30 s for the object to fall from cliff A to
asked by Tiffany 
english
Please check the meaning: "Like a cat in a corn crib, the girl pup sneaked in from behind and sank her needlesharp teeth in the coon's back." Just the "like a cat in a corn crib" part. Thanks!
asked by Anonymous 
science
can anyone give me 10 examples or energy interconversions and how they work please thankyou.
asked by paul 
math
A rectangular skating rink measuring 30m by 20m is doubled in area by adding a strip at one end of the rink and a strip fo the same width along one side of the rink. Find the width of the strips if the enlarged rink is still rectangular.
asked by tina 
Chemistry
A student draws four resonance structures for nitromethane (CH3NO2). How many lewis structures should have been drawn to represent nitromethane?
asked by Amy 
physics
A treasure map you uncovered while vacationing on the Spanish Coast reads as follows: "If me treasure ye wants, me hoard ye'll have, just follow thee directions these. Step to the south from Brisbain's Mouth, 6 paces through the trees. Then to the west, 10
asked by julianna 
Algebra
Express the sum below using summation notation. Use 1 as the lower limits of summation and i for the index of summation. 1/3+2/4+3/5+...+18/20
asked by Roger 
Probability
f two indistinguishable dice are rolled, what is the probability of the event {(3, 3), (2, 3), (5, 3)}? 1 What is the corresponding event for a pair of distinguishable dice? 2 {(3, 3), (2, 3), (5, 3)} {(3, 3), (2, 3), (5, 3), (3, 5), (3, 2)} {(3, 3), (2,
asked by Liz 
Chemistry
Consider the following chemical equation. MnCl2(s) + H2SO4(aq) → MnSO4(aq) + 2 HCl(g) How many grams of manganese(II) chloride must react with sulfuric acid to release 50.0 mL of hydrogen chloride at STP?
asked by Kalen 
Math
an auditorium has 50 rows of seats. THe first row has 20 seats, the row has 21 seats, the third row has 22 seats, and so on. each row having one more seat than the previous row. How many seats are there all together?
asked by Brittni 
World History
The religion based on the teachings of Siddhartha Gautama is known as?
asked by Alexis 
Math2
if arc AC=140 degrees, what is angle ABC? if angle ABC=28 degrees, what is arc AC?
asked by Ian 
physics HELP
A jet plane is flying with a constant speed along a straight line, at an angle of 27.0° above the horizontal, as Figure 4.30a indicates. The plane has weight whose magnitude is 86500 N, and its engines provide a forward thrust of 103000 N. In addition,
asked by angela 
Chemistry
For a molecule of fluorous acid, the atoms are arranged as HOFO. What is the formal charge on each of the atoms? Enter the formal charges in the same order as the atoms are listed. (I searched everything online to find the shape of HOFO but could not find
asked by Rita 
chemistry
How many mL of a 0.90% (m/v) NaCl stock solution will you need to to prepare 250 mL of a 0.225% m/v NaCl solution?
asked by nate 
Chemistry
Describe the spectrum of the light from a fluorescent lamp and from an incandescent (tungsten filament) lamp, and try to explain what you observe. So fluorescent lamps use electricity to excite mercury vapour, and the excited atoms produce shortwave UV
asked by Jon 
chemistry
What volume of 0.115M NaOH is required to reach the equivalence point in the titration of 25.00 mL of 0.200M of HF? Ka(HF)=7.4 x 10^4
asked by csb 
Math
johnny is directly in front of dougie, who is playing goalie as shown. johnny is 2.8m from both goal posts. he is also three times as far from dougie as dougie is from either post. he is also three times as far from dougie as dougie is from either post.
asked by Sarah 
chemistry
How many of grams of aluminum would be produced from the decomposition of 21.0 g of Al2O3
asked by Bright 
physics
a simple pendulum with the length of 2.08m oscillates. the acceleration of gravity is 9.8 m/s^2.how many complete oscillations does the pendulum make in 3.75 min?
asked by Harmonie 
Chemistry
how many moles of oxygen are needed to react with 1.6 moles of isopropyl alcohol, CcH7OH Equation is 2 C3H7OH + 9 02 >6 CO2 + * H2O
asked by dody 
Chemistry
How many moles of NaOH must be added to 1.0 L of 1.4 M HC2H3O2 to produce a solution buffered at each pH? (a) pH = pKa mol (b) pH = 3.07 mol (c) pH = 5.15 mol
asked by justin 
Precalculus
1.Write the expression as a sum or difference. cos(5x)cos(4x) 2.Write the expression as a product. cos(4x)cos(12x)
asked by Lynette 
chemistry
Given the compounds H2S, NH3, and SO2. Determine the order o boiling points. Rank them from highest to lowest boiling point. Give an explanation for your ranking by the electronegativity data a by type of intermolecular force.
asked by regina 
Physics
If a large housefly 3 m away from you makes a noise of 43 dB, what is the noise level of 1200 flies at that distance, assuming interference has a negligible effect? Noise level of 1200 flies = ??dB HELP: Using the formula for decibels and the given
asked by HelpPlease 
physics
A 4.8 kg block is pushed along the ceiling with a constant applied force of 87 N that acts at an angle of 55.0° with the horizontal, as in Figure 433. The block accelerates to the right at 6.00 m/s2. Determine the coefficient of kinetic friction between
asked by Corey 
geometry
the vertices of ABC are A(1,1) B(7,3) and C(2,6) write and equation of the line that contains the median from c to ab
asked by lexus 
chemistry
Prepare 250mL of 2.00M CuSO4 from CuSO4 x 5H2O
asked by margrav2 
chemistry
what is the partial pressure of 02 collected over water at 25 degree C and 630 torr (vapor pressure of H20 at 25 degree C is 23.8 torr)
asked by dody 
physics
A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard
asked by Corey 
physics
A hotdog vendor named Sam is walking from the southwest corner of Central park to the Empire State Building. He starts at the intersection of 59th Street and Eighth Avenue, walks 3 blocks east to 59th Street and Fifth Avenue, and then 25 blocks south to
asked by milly 
11th grade
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.17 x 10^6 m/s. find the central force acting on the electron as it revolves in a circular orbit of radius 5.42 x 10^11m.
asked by Julia 
physics
A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard
asked by Corey 
Statistics
Use the following results obtained from a simple linear regression analysis with 12 observations. ￼ =37.2895(1.2024)X R2=.6744 sb1=.2934 Test to determine if there is a significant negative relationship between the independent and dependent variable at
asked by Sam 
Physics
A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance of 5.00 cm from its unstretched position when the system is in equilibrium. If the spring constant is 54.1 N/m, determine the mass of the object.
asked by Anonymous 
Finance
Calculate die aftertax cost of debt under each of the following conditions: a. Interest rate of 13%, tax rate of 0% b. Interest rate of 13%, tax rate of 20% c. Interest rate of 13%, tax rate of 35%
asked by Anonymo 
Physics
1. Harry accidentally falls out of a helicopter that is traveling horizontally at 100 m/s. He plunges into the ocean below him 2.2 seconds later. How high above the ocean was the helicopter when Harry fell out? Hiw far did Harry travel horizontally while
asked by Anonymous 
Geometry
Point H is the midpoint I'd line segment GJ Line segment GH is 7x5 HJ is 4x+1 what is the value of X?
asked by Katie 
physics
A Boston cab driver picks up a passenger at Fenway Park, drops her off at the Fleet Center. Represent this displacement with the vector D. What is the displacement vector from the Fleet Center to Fenway Park? a)D b)2D c)0 d)D aka: D=vector d in the
asked by stephanie m. 
Chemistry Buffers
a buffer is prepared by mixing .208 L of 0.452 M HCl and 0.5 L of 0.4 M sodium acetate. When the Ka= 1.8 x 10^5 I figured out that the pH= 4.74 but then it asks how many grams of KOH must be added to the buffer to change the pH by .155 units?
asked by Mikey 
Calculus
Find the interval(s) where the function is increasing where and it is decreasing. f(x)=sin(x+(pi/2)) for 0≤x≤2pi so my derivative is f'(x)=cos(x+(pi/2))? and my critical number is pi/2?
asked by sh 
chemistry
the much used drug cocoaine is an alkaloid. Alkaloids are noted for their bitter taste, and indication of their basic properties. Cocaine, C17H21NO4 is soluble in water tot he extent of 0.17 g/100 ml solution, and a saturated solution has a pH of 10.08.
asked by Symone 
chemistry
1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and
asked by Anonymous 
Chemistry
A piece of solid carbon dioxide, with a mass of 6.8 g, is placed in a 4.0L otherwise empty container at 21°C.
asked by Felicia 
physics
An aircraft carrier sails northeast at a speed of 6.0 knots. Its velocity vector is v. What direction and speed would a ship with velocity vector –v have? speed should be in knots and direction should be one of the following: northwest,
asked by emily li 
accounting
What benefits do you see for the U.S. economy in taxsparing credits? Should it be expanded or reduced? Why or why not? The North American Free Trade Agreement (NAFTA) has tax consequences. Discuss the costs and benefits as you see them for the U.S. from
asked by daniel 
Physics
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 28.0 s. (a) How tall is the tower? m (b) If this pendulum is taken to the Moon, where the freefall
asked by Lynette 
Chemistry
What is the geometry of XeF4? 1)tetrahedral 2)square planar 3)octahedral 4)seesaw 5)bent
asked by Sarah 
ethics
What are some examples of cultural differences around the world that can affect business practices? Should a business change practices based on cultural sensitivities? Why or why not?
asked by Anonymous 
Chemistry
Consider the following chemical equation: HgO(s) → Hg(l) + O2(g) How many milliliters of oxygen gas at STP are released from the decomposition of 3.00 g of mercuric oxide?
asked by Kalen 
Algebra one help, please.
Determine which lines, if any, are parrell or perpindicular linea= y=4x line B= y=1/4x line c= y= 4x1 I think line B and A are parrell. Am I correct? Please help me, thank you.
asked by Allyson 
algebra
log9 1= _______ (fill in the blank) Let x=log2 1/32 . Write the exponential form of the equation and solve the equation for x.
asked by math help 
English
This is the number of years that someone has lived , or that something has existed. (What is the part of speech of 'that'? Is 'that' a relative adverb or a relative pronoun? What is the antecedent of 'that'?) English  Writeacher, Sunday, December 5, 2010
asked by rfvv 
Physics
A objectspring system oscillates with an amplitude of 4.0 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, determine each of the following values. (a) the mechanical energy of the system J (b) the maximum speed of the object m/s (c)
asked by Josh 
Math
To conduct a scientific experiment, students need to mix 90 mL of a 3% acid solution. They have a 1% and a 10% soulution available. How many mL of each of the two solution must they combine to pruduce 90mL of the 3% solution?
asked by James 
Chemistry
Given the balanced equation, how many milliliters of oxygen gas at STP are released from the decomposition of 5.05 g of calcium chlorate?
asked by Kalen 
Physics
A block of mass 0.5 kg rests on a smooth inclined plane. It is then pushed by a horizontal force of 16N. When the block has displaced 5m along the inclined plane. What would be the speed of the block if the plane is rough and a friction of 5N is acting on
asked by Alex 
Chemistry
What is the ionization energy (in kJ/mole) of the hydrogenlike ion F8+ ?
asked by Marissa 
Chemistry
Consider the following chemical equation. H2(g) + I2(g) → HI(g) Assuming all gases are at the same temperature and pressure, how many milliliters of hydrogen iodide are produced from 825 mL of H2?
asked by Kalen 
Physics
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 28.0 s. (a) How tall is the tower? m (b) If this pendulum is taken to the Moon, where the freefall
asked by Albert 
physics
A phonograph record of radius 6 cm and mass 15 g is rotating with an angular velocity of 33.33 rev/min. A Penny of mass 1 g suddenly falls on the record and lands at the radial distance of 4 cm from the record’s center. What is the angular velocity after
asked by Ama 
statistics
A production process is considered to be out of control if the produced parts have lengths with a standard deviation greater than .5 mm. A sample of 41 parts yields a sample standard deviation of .58 mm. At the .05 significance level, does this sample
asked by Mallory 
algebra 1
use multiplying by 1 to find an expression equivalent to 11/14 with a denomenator of 56c the equivalent expression is
asked by robbie 
Chemistry
if 30.0 grams of molten iron (III) oxide reacts with 275 grams of aluminum, what is the mass of the iron produced.
asked by Kalen 
English
Hello! Does anyone know how to insert pages in Word 2007? I want my fourth page to be numbered with 1. I have been searching for the way to do this for at least 2 years. I have never done it! I have checked all Web pages. Need someone !@#$%^&ally knows how
asked by tee 
Statistics
True or False, In simple linear regression analysis, if the error terms exhibit a positive or negative autocorrelation over time, then the assumption of constant variance is violated.
asked by Zack 
accounting
Howell Corporation purchased $350,000 of its bonds on June 30, 2010, at 102 and immediately retired them The carrying value of the bonds on the retirement date was $339,500. The bonds pay semiannual interest and the interest payment due on June 30, 2010,
asked by Mayumi 
Physics
The freefall acceleration on Mars is 3.7 m/s2. (a) What length pendulum has a period of 4 s on the earth? cm What length pendulum would have a 4 s period on Mars? cm (b) A mass is suspended from a spring with force constant 10 N/m. Find the mass suspended
asked by Albert 
physics
A box slides down a 33° ramp with an acceleration of 1.38 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.
asked by Kevin 
chem
1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and
asked by Anonymous 
Physics
Need help with part b... I got a to be k = 94.985 N/m I can't figure out how to go about doing part b.. A platform of mass 0.79 kg is supported on four springs (only two springs are shown in the picture, but there are four altogether). A chunk of modeling
asked by Anonymous 
MATH
A triangle with two congruent sides and two angles that both measure 45 is a.scalene and right b.isosceles and acute c.isosceles and right d. Equilateral and acute
asked by Please Help! 
accounting
Calculate the rate of depreciation for the asset with the help of given data.? Cost of the asset Rs1,20,000 Residual value Rs40,000 Expected life 5 years
asked by pinki 
Math help

Chemistry
Consider the following chemical equation. SO2(g) + O2(g) → SO3(g) What volume of sulfur dioxide gas reacts with 37.5 L of O2? The reaction conditions are 875°C and 1.00 atm pressure.
asked by Kalen 
Psychology
Create an operational definition of selfconfidence using peer reviewed articles as reference
asked by Linda 
chemistry
Predict the product: hydrogen peroxide (catalyzed by manganese dioxide)
asked by Nick 
physics
A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting from rest? (If the box
asked by Bill 
Kinesiology
Joey weighs 77 lb and sits on a seesaw at a distance of 30 inches from the fulcrum. Jenny weighs 67 lb and sits on the opposite side of the seesaw at a distance of 48 inches from the fulcrum. Mikey weighs 30 lb and wants to play but doesn’t know where to
asked by Jessi 
Physics
Two thin rectangular sheets (0.29 m 0.40 m) are identical. In the first sheet the axis of rotation lies along the 0.29m side, and in the second it lies along the 0.40m side. The same torque is applied to each sheet. The first sheet, starting from rest,
asked by Brandon 
Spanish
1. "Perdón, ¿cuánto ____ este suéter?" "Veinte pesos." a. cuestan b. cuesta c. compra d. va A or B? 2. Busco una camisa verde ________. a. a tí b. a mí c. conmigo d. para mí D? 3. Quiero comprar unas manzanas? ¿_______ cuestan? a. Cuánta b.
asked by mysterychicken 
AP Physics
I have two problems i don't understand if you could solve and show me what you did I would appreciate it :) 1.A 62.0kg person, running horizontally with a velocity of +3.54 m/s, jumps onto a 13.4kg sled that is initially at rest. (a) Ignoring the effects
asked by Deanna 
11th grade
A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box
asked by Bill 
Precalculus
Evaluate all six trigonometric functions at t, where the given point lies on the terminal side of an angle of t radians in standard position. (40/41, 9/41)
asked by Anonymous 
Physics
omar throws a rock down with speed 12 m s from the top of a tower. The rock hits the ground after 2.0 s. What is the height of the tower?
asked by Jesse 
chem
Extraction of caffeine: You had extracted 2 g of crude caffeine and you were in a hurry. Instead of doing the 6 successive extractions with 2ml portions of methylene chloride, you only did 2 successive extractions with 6 ml portions of solvent. Now,
asked by Anonymous 
physics
A wheel is roatating freely at an angular speed of 800 rev/min on a shaft of negligible moment of inertia. A second wheel initially at rest and with twice the moment of inertia of the first, is suddenly coupled to the same shaft. (a) what is the angular
asked by Ama 
trigonometry
find all degrees solutions to the following equation: sin (A + 50 degrees)=1/square root 2
asked by maria 
chemistry
using the lewis dot structures, predict the formula for the compound formed between lithium and chlorine.
asked by becca 
chemistry
3 CH3NH2 + 11 HNO3 > 3 CO2 + 13 H2O + 14 NO RATE OF DISAPPEARANCE OF NITRIC ACID IS 20M/min. what is the rate of reaction? at what rate is the concentration of carbon dioxide changing?
asked by candace 
chem
A 1.00 L volume of buffer is made with concentrations of 0.350 M NaCHO2 and .550 M HCHO2. a) What is the initial pH of the buffer? b) What is the pH after the addition of .0050 mol HCL? c) What is the pH after the addition of .0050 mols NaOH?
asked by Symone 
Physics  check this work for horizontal displacem
A 1.5kg melon is placed on top of the post. A girl lying on the ground fires a 500g arrow at ground level with velocity of 20m/s, 60deg above the horizontal, and hits the melon when the arrow is at its highest point. The melon, with the arrow embedded,
asked by Farah 
Physics
I need help with part b... I found in part a that delta L is .29568m and I think I might be doing something wrong with the units because I can't get the right answer. A 156 g hockey puck is attached to a rubber band and rotated with an angular speed of
asked by Anonymous 
language
okay i read the book Royally Jacked for english and i had to return the book and i need to finsh my book report ASAP ! i need to know 20 vocab words used in the book , venn diagram , plot diagram , summary 310 ! and i cant FAIL . so can you please help me
asked by taylor 
History
Name the contributions that Islamic civilization made in the following areas: architecture, philosophy, science and technology, geography and navigation, medicine, bookmaking and literature, art and music, and recreation.
asked by Hi 
religious study
What is “the problem of evil,” and why is it particularly problematic for Western, monotheistic religious traditions? I am able to address "the problem of evil"; however, I do not know the second part of the question; can someone kind enough to give me
asked by Nathan 
physics
The volume of the Earth's oceans is approximately 1.4×1018 m3. The Earth's radius is 6.4×106 m. What percentage of the Earth, by volume, is ocean?
asked by julianna 
communication
Many businesses now have a Twitter account, MySpace account, or another social media tool they use to attract and maintain business. What value do social media offer for professional use? How has your commercial behavior been affected by social media
asked by shelly 
Math
Which of the following shapes could not represent a top, front, or side view of a pentagonal prism? a. A pentagon b. A triangle c. A square d. A rectangle
asked by Please Help! 
Composition
I would like to get a second opinion if I am correct. I had to write five sentences about the role of education in successful financial planning, in which I correctly use a different verb tense in each sentence. Here is what I wrote. Our education plays
asked by Jim 
chemistry
Extraction of caffeine: You had extracted 2 g of crude caffeine and you were in a hurry. Instead of doing the 6 successive extractions with 2ml portions of methylene chloride, you only did 2 successive extractions with 6 ml portions of solvent. Now,
asked by Anonymous 
Physics
A 0.2 kg hockey puck is placed against a spring lying on a horizontal frictionless surface. The spring is compressed 0.2 m, with the hockey puck, and then released. The hockey puck when released is able to go up a frictionless slope with an angle of 30
asked by Amy 
physics
A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 6.2 m higher than A, with speed v/2. Calculate the maximum height reached by the stone above point B.
asked by anna 
physics
A steel ball bearing the radius 1 cm is rolling along a table with speed 20 cm/sec when it starts to roll up an incline. How high above the table level will it rise before stopping? Ignore friction losses.
asked by Ama 
Physics
An arrow is shot from a bow at 42 m/s at 70 degrees what is the horizontal and vertical components
asked by Ally 
Math
A)how do I find an inverse variaton equation that model: Length(in.) 4 6 8 9 10 Breaking weight(pennies)24 16 13 11 9 B)Explain how your equation shows that breaking weight decreases as length increases. Is this pattern reasonable for this situation?
asked by Taylah 
ASU
A weightlifter performing a curl with a 320 N barbell stops the lifting motion with his forearms in a horizontal position. (a) If the line of action of the weight of the barbell is 27 cm from the axis of rotation (elbow joint), what is the magnitude of the
asked by jhkh 
History
What were the three major cities in the Islamic world? How did each develop and grow to become important?
asked by Hi 
Chemistry
What is the atomic mass of an element if one hatom has a mass of 2.107 x 10x10 to the 22 power g
asked by dody 
Chemistry
how do I write the equation for How many grams of sodium nitrate are required to form 90.0 grams of water?
asked by dody 
PHYSICS
The space probe Deep Space I was launched on October 24, 1998. Its mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generated only a weak thrust, but it could do so over long periods of
asked by hy 
business
a presentation conclusion has one purpose: to summarize your key points. True or false
asked by Marisela Cordova 
physics
what equation would i use if i wanted to find the magnitude for this problem A box of mass 32.0 kg is subject to an applied force (FA) with an elevation angle of 39.9°, and it accelerates to the right at 6.31 m/s2. The horizontal surface has a coefficient
asked by Jessica 
composition
I made a correction in my previous paragraph. I want to make sure I identified the verb tenses correctly. Thank you in advance for your thoughts. Our education plays (simple present tense) a significant role in our future financial planning. I have taken
asked by Jim 
math
Find the value of x. Give answer in simplest radical from. (It's a triangle split into 3 parts)
asked by camber 
word meaning
what does the word "implied" mean in this sentence?: "What was implied after Billy's mother found him using her scissors?"
asked by Thanks to all Jiskha Teachers 
Math
There is a 4 by 4 grid of points. Each pair of horizontally adjacent or vertically adjacent points are separated by a distance of 1 unit. How many circles of radius 1 pass through exactly 2 of these grid points? Justify your response. (Note: the circles
asked by SkaterGirl 
Physics
Assume the optimal coffee drinking temperature is 75°C, and further assume coffee has the same heat capacity and density as water. a. How much energy is required to raise the temperature of 1 cup (0.237 liters) of coffee initially at 25°C to the optimal
asked by Steve 
11th grade
Consider two vectors where F1 = 38 N, F2 = 58 N, and = 240o and = 25o, measured from the positive xaxis with counterclockwise being positive. What is the magnitude of the equilibriant?
asked by ray 
Biomechanics
A weightlifter performing a curl with a 320 N barbell stops the lifting motion with his forearms in a horizontal position. (a) If the line of action of the weight of the barbell is 27 cm from the axis of rotation (elbow joint), what is the magnitude of the
asked by jim 
7th gd. prealgebra
What is the circumference of a 78.75 cookie using pi= 3.14?
asked by Tamia 
physics need help!
I really need help on this Q, don;t know what to do with multtiple complex forces: A jet plane is flying with a constant speed along a straight line, at an angle of 27.0° above the horizontal, as Figure 4.30a indicates. The plane has weight whose
asked by angela 
Chemistry
Why is graphite such a good conductor of electricity? Why is diamond the hardest naturally occurring substance?
asked by Olivia 
English
Thank you very much for your corrections. I still have a few questions on my previous post. 1. I'm as fast as a lightning. I'm fast like lightning. I'm fast like a lightning. (?) I'm lightning fast. 2.The personification is usually made (recognizable?)
asked by Franco 
chemistry
Predict the the product for the following reactions. zinc + hydrochloric acid sulfuric acid + sodium hydroxide sodium + hydrogen acetic acid + coppper
asked by Amanda 
Physics
#1.) A wind turbine has a Cp of 0.42 and extracts 50 kW of power when the wind velocity is 25 m/sec. How long are the blades? (ρ = 1.2 kg/m3) #2.) An electric hot water heater is used to heat 30 gallons of water from 20 °C to 45 °C. a. What heat energy
asked by Ricky 
science
a fan uses 150j of mechanical energy, 20j of heat and 75j of sound energy a) what is the total input energy b) what is the total useful output energy c)what is the total wasted energy d) what is the energy efficiency e) what percent of the energy was
asked by Anonymous 
Math
There are three distinct ways to add four positive odd numbers to obtain 10: 1 + 1 + 3 + 5 = 10 1 + 1 + 1 + 7 = 10 1 + 3 + 3 + 3 = 10 Here, distinct means that changing the order of the numbers on the lefthand side of an equation does not count as a new
asked by SkaterGirl 
Chemistry
The volume of 02 collected over water at 25 degree C and 740 torr, was 250 mL. What volume will the dry 02 occupy at STP? (Vapor pressure of water at 25 degre C is 23.8 torr).
asked by dody 
Precalculus
State whether or not the equation is an identity. Prove your statement. sin(x)/cos(x)+ cos(x)/1+sin(x)=sec(x) (sorry about that)
asked by Anonymous 
physics
A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting from rest? (If the box
asked by Corey 
math probabilty
Find the (theoretical) probability of the given event, assuming that the coins are distinguishable and fair, and that what is observed are the faces uppermost. Six coins are tossed; the result is at most one head.
asked by Liz 
Chemistry
What is geometry of Ammonia? 1)trigonal planar 2)square planar 3)Tsquared 4)trigonal pyramidal 5)tetrahedral What is the bond angle of Ammonia? 1)109.5 2)less than 90 3)less than 109.5 4)90 5)120
asked by Amy 
Algebra
Four circles with centers A,B,C,and D are mutually tangent. The areas of circles A,B,C, and D are 25pi, 100pi, 16pi, and 225pi respectively. How many units are in the perimeter of quadrilateral ABCD?
asked by Tyler 
algebra
Solve x9/x^24 < 0 and write interval notation
asked by math help 
Ancient Greece question
What were the main wars in ancient greece? Thank you.
asked by Allyson 
mathPLEASE HELP
Convert to decimal notation. 8.23 * 10^7
asked by Michelle 
College Chemistry
How do you calculate the value for Delta U for a system that loses 50 J of heat and has 150 J of work performed on it by the surrondings? I need to know the formula to use and how to use it. Thank you!
asked by Heather 
BIOMECHANICS
The NCAA requires that a basketball dropped from a height of 1.83 m (measured to the bottom of the ball) bounce to a height of 1.24 to 1.37 m (measured to the top of the ball). Assuming the diameter of a typical basketball is 0.25 m, calculate the
asked by jhkh 
chemistry
2 Na2 + @H20 > 4NaOH + 02 Whtes 200. g of Na202 were reacted, 32.0g of 02 were collected The yield of 02 colleced how many percentages?
asked by dody 
chemistry
Dissolve 1.5g of an unknown salt into 37g of water and find that the new vapor pressure at 75C is 277 torr. What is the Molar Mass of the unknown? How many grams of the unknown would have to be used in 100ml of water to make a 11.5% solution by mass of the
asked by regina 
History
People of three religions worked and studied together in Cordoba, Spain. What were those three religions? What achievements came from this region of the Muslim world? Why might this time period be termed a “golden age of cooperation”?
asked by Hi 
Computer Science
Write an Assembly program that reads in a number of cents. The program will write out the number of dollars and cents separately.
asked by Anonymous 
physics
A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box
asked by Corey 
Gilgamesh
How Does Gilgamesh respond to the death of Enkidu? a) He flees the city of Uruk to seek immortality b) He builds up the city of Uruk with monuments and massive walls to honor Enkidu c) He blames the harlot lass for brining this pain and suffering on Enkidu
asked by Johnathan 
math
A,B are two points on a given line L.L is the midpoint of the section AB. find the coordinate of point B if the coordinate of A=7 and the coordinate of L=4
asked by Sabra 
bonar law
Colonel Harry a. Froboess of Switzerland jumped upward and outward from a windonw of a blimp and landed in a body of water on June 22, 1936. His jump was 120m, about the height of a 40storey building. The path of his jump can be represented by the
asked by tina 
Algebra uno help please :)
Write an equation of the line that passes through the given point and is parrel to the given line. 1. (1,3) Y=2x+2 I'm thinking that you just plug in 1 and 3 for x and y. So, 3=2(1)+2 Correct? Please help me. :) Thank you Allyson
asked by Allyson 
geometry
In right triangle ABC, angle A=3, angle B=60, and angle C=90. Find AB with AC is 12 ?
asked by Eliza 
10th grade
jordan has 2 quarters, 1 nickel, and 3 dimes. if he took 1 out and then a second one without replacing the first coin, what is the probability that both coins were dimes?
asked by audrey 
physics
a 40 kilogram barrel is rolled up a ramp 10 meters long to a height of 5 meters how much work was done?
asked by Anonymous 
physics
A source of sound (1200 Hz) emits uniformly in all directions. An observer 2.99 m from the source measures a sound level of 41.1 dB. Calculate the average power output of the source.
asked by Matt 
elementary
If P(B)=1/5, compute P(not B) Please Help??
asked by Shan 
English
Can you please check these sentences, too? Thank you. 1.Hilary can't live without her mobile phone or without her car. She needs a car for work. 2.In contrast, Jason usually rides his bike around, catches trains and walks. Hilary need her computer to keep
asked by Franco 
english
What is the significance of the significance of the passage "Conscience says to me, "What had poor Miss Watson done to you that you could see her !@#$%^&er go off right under your eyes and never say one single word? What did that poor old woman do to you
asked by tracee 
geometry
in a diagram of a scalene triangle ABC, line DE is the midpoint of line AB and line AC and DE=7 find the length of line BC
asked by melinda 
Chemistry
sorry How many moles of exygen are needed to react with 1.6 moles of isopropyl alcohol, C3H7OH Equation is 2 C3H7OH + 9 02 > 6 CO2 + 8 H20
asked by dody 
chemistry
How many grams of Urea would you have to dissolve in 500ml of H2O in order for the mass percent of H2O to be 88.8%? What is the mole fraction of Urea? What are the new boiling and freezing points?
asked by regina 
chemistry
Given .300 L of a buffer solution that is .250 M HC2H3O2 and .50 M NaC2H302, what is the new pH if .0060 mol HCL is added? what about .0060 mol NaOH?
asked by Symone 
chemistry
If you wanted to have a solution of benzene that would freeze at 0 degrees Celsius with NaCl, what would be the mole fraction of NaCl that you would need?
asked by regina 
algebra
Steve ran a distanse of 150 meters in 1 1/2 minutes. What is his meter per hour ?
asked by Anonymous 
6th grade
a bicycle wheel must make 13 revolutions to roll 25 meters. How many revolutions must the wheel make to travel 1 km? Hint: 1000 m = 1 km
asked by Serrena 
English
Thank you very much for your corrections. Here are some more sentences for you to check. 1)The mirror claims to have no preconception since it projects whatever it sees umisted by love or dislike.It reflects a woman who is becoming (growing, getting old).
asked by Franco 
chemistry
Prepare 600mL of a 100mM solution of glucose in 0.9% NaCl. Also need to prepare the 0.9% NaCl solution.
asked by margrav2 
physics
Does the multiplication of a scalar and a vector display the commutative property? This property states that the order of multiplication does not matter. So for example, if the multiplication of a scalar s and a vector r is commutative, then sr = rs for
asked by jay 
math
Multiply and then simply by factoring (√2y)(√3)(√8y)
asked by beth 
English
What does the simile "Like a cat in a corn crib" mean?
asked by Anonymous 
physics
A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .162 NO HELP: You are
asked by sarah 
math
A,B,C are points on the line L, the coordinate of B=2, c is a point that divides AB in the ration 2:3.if the coordinate of C=4, find the coordinate of A
asked by Sabra 
statistics
15.34 In a fourdigit lottery, each of the four digits is supposed to have the same probability of occurrence. The table shows the frequency of occurrence of each digit for 89 consecutive daily fourdigit drawings. Research question: At á = .01, can you
asked by Anonymous 
English
I forgot to include the following statements. Thank you. 1) You are fast like a lighning. Better: You are as fast as lightning. 2)Is it possible to write: "I didn't correct this paragraph because it was your first draft. You rewrote it neatly (?) on your
asked by Franco 
Transitional Math
Richard took a loan of $10000 at a rate of 5%. If he paid $2500 in interest, how long did it take him to pay off the loan?
asked by Troy 
physics
A rocket moves upward, starting from rest with an acceleration of 28.8 m/s2 for 4.13 s. It runs out of fuel at the end of the 4.13 s but does not stop. How high does it rise above the ground?
asked by Anonymous 
Calculus
Find the integral by substitution ∫ [(16 x3)/(x4 + 5)] dx ∫[ 4 x/(√{x2 + 3})] dx ∫ 8 x2 e4 x3 +7 dx PLEASE help with all three. i'd really appreciate it
asked by Erika 
algebra
The price of a new flat panel television is $3500. What is the total price of the television that includes the 6% sales tax?
asked by estrella 
physics
A solid sphere of radius 3 cm and mass of 100 g rolls down a 30 degree incline from a height of 1 m. A hoop of the same mass and radius rolls down the same incline from the same height. What is the linear velocity of each body at the bottom of the incline?
asked by Ama 
Math
if the angle between the two lines 3x5y1=0 and Kxy=3 is 45, then find the value of k
asked by Name 
english
can you answer this one into correct dangling modifier.Having wrapped up the package carefully it should be tied.
asked by josie 
Re chemistry
What are the concentrations in mass of the following solutions: a) a 200mL aqueous solution containing 4.26g sodium solfate. b) a 2.00 L aqueous solution containing 107.0g ammonium chloride NH4Cl. Plz can give me someone the answers for BOTH and the steps
asked by Tarkan 
English
Can you tell me if all my verbs are correct? Not one of the ushers knows where the lounge is. Mumps is a common childhood disease that causes swelling in glands in the neck. Politics is always a popular subject both to debate and to study at college. The
asked by Sam 
Physics
An Olympic swimming pool is heated and maintained at 30 °C in the winter. It has a volume of 2500 m3, a length of 50 m, and a width of 25 m. During a storm, the pool receives 1 cm of rain over its surface area. If the rain is 15 °C, what will the
asked by Jimmy 
Chemistry
If .002 L of .650 M NaOH are added to 1.0 L of 0.9 M CaCl2 what is the value of the reaction quotient and will a precipitate form? I keep getting 0.0011 because I thought the answer was [Ca+][OH] but that's not correct, I think I'm missing a final step
asked by Maddie 
college
can someone please give me an example of a situation in which personal or religious beliefs might conflict with something that may be asked of you professionally? What should you do in this situation?
asked by Anonymous 
chemistry
How many grams of Urea(CH4N2O) have to be dissolved into 253g of Chloroform in order for the boiling point to increase by 3.1C?
asked by regina 
physics
An original stationary car with a mass of 1500 kg reaches a velocity of 15 m/s/s after starting. what is the car's acceleration?
asked by Anonymous 
Operation management
1. Based on your reading and research explain whether or not you believe ERP and MRP are the only resource planning processes applicable to manufactured processes? 2. Can either ERP or MRP be used for service industries or can they only be used for
asked by daniel 
chemistry
Prepare 250mL of 2.00%(w/v) CuSO4 from CuSO4x5H2O
asked by margrav2 
algebra
the population P(t) of a new residential development t years after 2010 is P(t)=8000(1e^0.3). What is the population for 2015?
asked by math help 
physics
A 726 kg car travels from Boone to Blowing Rock along US321. How much working is needed to keep the car traveling at a constant speed of 21.8 m/s around a curve of radius 28.4 m?
asked by KC 
selfreflection essay
am writeing selfrelection essay abt the theme self perceiving society,society perceiving self, i dontknow how to start my outline to starte the thesis
asked by mercy 
Precalculus
State whether or not the equation is an identity. Prove your statement. sin(x)/cos(x)+ cos(x)/1+sin(x)=sec(x)
asked by Anonymous 
Business
How to develop documentation for Small Business professionals to manage a specific employment position that would assist professionals to choose, train, an develop successful employees toward helping the company meet its goals?
asked by Jessica 
math
In a Primary election,64 out of 100 registered voters actually vote. There are 750 registered voters in one precinct. how many people in the precinct voted?
asked by Someone 
physics
what happens to the gravitational energy of a firefighter when he slides down the firepoles?
asked by lester 
chemistry
Predict the products of the chemical reaction aluminum + iron(III) oxide
asked by Pedro 
comm155
Write a paragraph, using several sentences, to describe a recent interaction with a friend or family member about personal finance or credit cards. This interaction may be imagined or real. ·Use at least five different pronouns in your sentences.
asked by queen 
Chemistry
What are the concentrations of the following solutions: a) a 200mL aqueous solution containing 4.26g sodium solfate. b) a 2.00 L aqueous solution containing 107.0g ammonium chloride NH4Cl. Plz can give me someone the answers for BOTH and the steps how you
asked by Tarkan 
Math
A triangle with two congruent sides and two angles that both mesuare 45 is a. scalence and right b. isosceles and acute c. isosceles and right d.equilateral and acute
asked by Leah 
math
Identify the proportion listed below that solves this problem. It will take 13 people to pick 112 watermelons in a day. How many people will it take to pick 200 watermelons in a day?
asked by estrella 
U.S. History
Where was the greatest single American loss in the war? Charleston ?
asked by Taylor 
Math
What is the number of vertices of a triangular pyramid?
asked by Ana 
physics
how do you convert 3x10^3 rad to 10 min of arce
asked by flame 
math
If tanx=5/12 then what is sinx/2?
asked by Jon 
math
Find 0.12 ÷12 calculation steps
asked by ovi 
Math Please Help
Which statement is not true? Two or angles that are supplementary have a sum of 180 or Two angles that are complementary have a sum ot 45
asked by Please Help! 
math
the perimeter of an equilateral triangle is 9cm.how long is each side?
asked by zainab 
reading
What was the main problem in the book Mrs. Mack.
asked by osi 
writing
What does "seek to Serve" mean?
asked by kathy 
English
In the book Adventures of HuckleBerry Finn, what is the importance of the quote, "Now I say it ain't agoin' to be more'n two hours befo' this wrack breaks up and washes off down the river. See? He'll be drownded, and won't have nobody to blame for it but
asked by PLEASE HELP 
Math
If a grade was drawn at random from the data shown below, what is the probability that the grade is not a B? Grade Frequency A 2 B 8 C 11 D 2 F 1 I think it is 1 out of 5 or 4 but I am not sure? Please help :) Thank you much!
asked by Shannon 
Physics
A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .016 NO HELP: You are
asked by sarah 
math
415/10754
asked by diamond 
physics
A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .162 NO HELP: You are
asked by sarah 
English
This is the number of years that someone has lived , or that something has existed. (What is the part of speech of 'that'? Is 'that' a relative adverb or a relative pronoun? What is the antecedent of 'that'?)
asked by rfvv 
Physics
A doctor uses an insulated backpack to “hike in” vaccines to a rural village in Papua New Guinea that is too remote for vehicular traffic. The vaccines are kept cold by packing them in 10 kg of ice. If the backpack absorbs heat (leaks cold) at a rate
asked by Jimbo 
Commercial Law
What are the main requirements for a valid contract? And what is the difference between an offer and an invitation to treat and why is the difference important?
asked by MaSa 
math
the avreage of annes saras and julies test score is 72 julie scored 10 and anne scored 10 points higer than sara. what were annes and sara scores?
asked by riley 
Chemistry
Write equations for the following reactions: the combustion of propane the incomplete combustion of propane to for CO and water the complete combustion of 8,8dimethylpropane in oxygen
asked by Amanda 
statistics
One example of hypothesis testing would be to conduct a testing on how many hours a week a typical truck driver might drive.
asked by Anonymous 
chem 2
What concentration of NaF is required in order to convert a 0.15M HF solution to a buffer with a pH of 5.50?
asked by emily 
10th grade
if AB=3x2 and BC=x+6, what is x?
asked by Ian 
chemistry
describe the formation of a sr ion as its bons with chlorine to form SrCl2 and properties the compound will posess
asked by kevin 
science
Why do I have brown eyes? can it change color?
asked by kayla 
Biology
If a heterozygote is crossed with a recessive individual, what % of their offspring will be recessive (have light hair)?
asked by June 
Physics
A spring stretches 4.3 cm when a 13 g object is hung from it. The object is replaced with a block of mass 22 g that oscillates in simple harmonic motion, calculate the period of motion.
asked by Lynette 
English
Hi for my english class, we have to make an invention using cheap material that is useful, original, and provides a solution to a problem. We actually have to show the class like a prototype of it and I have no idea what to do! Mines on tuesday and I'm so
asked by John 
chemistry
How much 2.5mM solution of NaCl can be made from 30g of this pure salt?
asked by margrav2 
aLGEBRA
Tracy wants to purchase custommade bumper stickers to advertise her business. Two websites offer different deals: Website A: Pay a fee of $116.00, plus $0.50 per bumper sticker or Website B: Pay a fee of $99.50, plus $0.65 per bumper sticker At least how
asked by math help 
Language Arts
I have to write a research paper for L.A. and it must be comepletely in 3rd Person. I have all the research information and how i am organizing the paper but i can't seem to figure out how to start it off. How can i write a good introduction?
asked by Anonymous 
algebra
convert to a logarithmic equation:8^y=4096 Please show work.
asked by math help 
algebra
solve {58x}>11 and write interval notation for the solution set.
asked by math help 
marketing
Use the University Library or the Electronic Reserve Readings to locate a peerreviewed article that reports original research. Search "major databases (e.g.  ProQuest)" in the Online Collection, and use the key search words, "research studies in" to
asked by Rowena 
Science
If India had a population of 1.05 billion in 2002 with a steady growth rate of .9%, when would its population reach 4.2 billion?
asked by Anne 
science
can anyone give me examples of energy intercoversions please
asked by paul 
algebra II
if f(x)=1*1 graph and write the rule for g(x) if g(f) represents f (x) shifted right 3 places and up 2 places
asked by Anonymous 
college
1. How did U.S. manufacturers become vulnerable to offshore outsourcing? Give examples to support your answers.
asked by Lady 
English help
Could somebody please link me to a good working power point program? Since my powerpoint trial ran out and I have a project that's due tomorow? Thank you, it's for my english project. :)
asked by Allyson 
Math
a 52g. weight tied to a spring stretches the spring 1.3cm. How many grams would it take to stretch the spring 3cm?
asked by Sara 
Math

physics
how can we calculate potential energy if we don't have mass but we have force or newtons?
asked by edith 
6th grade
who ordered the great sphinx to be built
asked by erick 
algebra
the population P(t) of a new residential development t years after 2010 is P(t)=8000(1e^0.3t). What is the population for 2015? * algebra  Reiny, Sunday, December 5, 2010 at 6:19pm replace t with 5 and evaluate using your calculator (I got 6215) I was
asked by math help 
Accounting Specialized Journals
In store credit customer makes purchase on account for $50.00, invoice #18. What do the enteries look like using specialized journals, general ledger and subsidiary ledger sheets please?
asked by Barb 
com155
What role does eduction play in succesful financil planning? Me going back to school plays a major role in finacil planning. Is this correct in verb tense?
asked by darlene 
algebra
1.)Find the equation of the circle with center (1, 3) and radius r =2. 2.)Find the area of the circle of the above problem?
asked by Shan 
calculus
If f(x)=8x +2 find the exact area under the curve from x=0 to x=2.
asked by Anonymous 
English
Hello again. Thanks for help. Could you please help me with one more sentence: British troops will withdraw from (leave)the country by 2011 OR will have withdrawn (will have left)? Maybe, both? Thank you very much.
asked by Ilma 
algebra
the number of cats that are homeless can be modeled by the equation N= 2.1t squared  82t + 95 where N is the number of cats that are homeless and t=0 set as the current year.Use the quadratic model to find the number of years from now until the number of
asked by linda 
physics
A 45 g mass is attached to a massless spring and allowed to oscillate around an equilibrium according to: y(t) = 1.3 * sin( 0.6 * t ) where y is measured in meters and t in seconds. (a) What is the spring constant in N/m? k = N/m .162 NO HELP: You are
asked by sarah 
MATH
Someone please help me not sure if I even know what I am doing with any of this. write the following ratios in simplest form 5 3/5 to 2 1/10 5 3/5 2 1/10 x 100/100 = 8/20 = 2/5 the ratio of 7 dimes to 3 quarters 7/3 x 100/100 = 700/300 = 175/75 solve the
asked by TANGIE 
chemistry
How many moles are in 3.0L of NO gas at STP?
asked by Jazminn 
science
a young girl with a mass of 46 kg is hanging motionless from a tree branch. what is the net force on the girl
asked by grayson 
chemistry
A student wants to determine of an irregularly shaped peice of sodium metal . The student is warned not to use water displacement to find the volume of the peice of sodium . Explain the reason for the warning and pffer a effective solution to the students'
asked by nina 
Math
The number is between 3 and 10, you can make exactly 3 arrays with this number and it's not 9. What is it?
asked by Craig 
Math
A rectangular flowerpot is 20 inches long 8 inches wide and 6 inches high. true or false if andy fills the flowerpot 2/3 fullof potting soil the expression 2/3(20 + 8 + 6) could be used to find the amount of potting soil he needed
asked by Lisa 
math
If the coordinate of A on the real number line is 2, find the coordinate of B if AB= 5 units
asked by Sabra 
algebra
A*B=A*B Solve for B
asked by Bob 
character traits
please name some character traits for a boy that believes in his pups, and waits to see what they do. He also is a little pushy.
asked by <3 
Sci !!!ASAP!!!
How do people help plants ?
asked by Sumaiya 
Math
A public opinion poll found that 5 out of 8 people in a community wanted a exercise course. if there are 10,000 people in a community, how many do NOT want a exercise course?
asked by Sara 
7th grade
How are landform, like dells, formed?
asked by something 
chemistry
If the heat of fusion for ethyl alcohol is 26 cal/g, how many grams must freeze to release 780 cal?
asked by jacee 
Math
There are three distinct ways to add four positive odd numbers to obtain 10: 1 + 1 + 3 + 5 = 10 1 + 1 + 1 + 7 = 10 1 + 3 + 3 + 3 = 10 Here, distinct means that changing the order of the numbers on the lefthand side of an equation does not count as a new
asked by SkaterGirl 
math
The price of a new flat panel television is $3500. What is the total price of the television that includes the 6% sales tax?
asked by estrella 
Math
If P(B)=1/5 compute P(not B)? So I am thinking it may be P(not B)=0.2? Is this right?
asked by Shannon 
Statistics
True or False In Regression Analysis if the variance of the error term is constant, we call it the Homoscedasticity property.
asked by Ben 
science
discuss the laws of electrostatic charges. for each of these laws, describe a lab activity you did which demonstrated the law
asked by Anonymous 
com155
What role does eduction play in succesful financil planning? Me going back to school plays a major role in finacila planning
asked by darlene 
English
1. Is Sandy a male name or a female name? 2. Is Jeremy a male name or a female name?
asked by rfvv 
ethics
What if the doctor really can't afford to treat someone who cannot pay? What if the cost of the care is too much to bear? What then?
asked by Anonymous 
English
1. Andy has lived for 40 years. 2. The animal has existed for 7 years. (Are the sentences grammatical?)
asked by rfvv 
advice
could you mark each verb used in bold. identify the specific tense used in parentheses. I have seen many examples of different saving plans. I planned on using these strategies in my personal life.
asked by brittany 
Chemistry
What volume will .00 L of Gas occupy if the temperature is changed form 30 degree C to 90 degree C (P is constant)
asked by dody 
adv. alg.
list all roots of 1) x^53x^4+3x^3x^2=0 2)8x^312x^2+6x1 3) x^4=16
asked by Kaleb 
english
is it grammatically correct to write My great aunthas lived at 1430 green street
asked by Anonymous 
History
Where were Muslim trade routes established? What products and inventions traveled along these routes? How did Muslim scholars preserve and pass on knowledge to medieval Europe?
asked by Hi 
chemistry
Explain what is required to create a buffer that needs to protect the pH between 8.1 and 8.5. EXPLAIN IN DETAIL
asked by Symone 
physics
what equation would you use if you wanted to find the net xdirection force on the box example: here is the problem... A box of mass 24.0 kg is subject to an applied force of 245 N with a depression angle of 31.2°, and it accelerates to the right. The
asked by andrew 
Precalculus
State whether or not the equation is an identity. Prove your statement. sin(x)/cos(x)+ cos(x)/1+sin(x)
asked by Anonymous 
English
Hi for my english class, we have to make an invention using cheap material that is useful, original, and provides a solution to a problem. We actually have to show the class like a prototype of it and I have no idea what to do! Mines on tuesday and I'm so
asked by John 
Math Please Help
The premiters of two equilateral triangles are in the ratio 2:3. If the perimeter of the smaller triangle is 16 cm what is the measure of a side of the larger triangle?
asked by Please Help! 
Chemistry Lab Math
Prepare 600mL of a 100mM solution of glucose in 0.9% NaCl.
asked by margrav2 
Science
I have a paper due where I have to develop a healthy eating plan. I have the paper almost completed but I need a little help in one area. how your plan may be adjusted to fit your changing nutritional needs as a result of age or changes in physical
asked by Anonymous 
algebra
If a system has an infinite number of solutions, use setbuilder notation to write the solution set. If a system has no solution, state this. m  2n = 16, 4m + 4 = 1
asked by Anita 
Math
Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__
asked by Lisa 
Science
What is a 3 dimensional ecosystem? What is a 2 dimensional ecosystem?
asked by Joe 
french
what does Elle travaille dans un hotel mean in english?
asked by sufain 
algebra
Solve and check all proposed solutions. Show work for solving and for checking. x+1/x1  2/x^2x=0
asked by math help 
Math

Math
Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__
asked by Lisa 
English
I need 30 sentences in the past
asked by zozo 
algebra
solve 15= 4m^sq
asked by jame 
physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59.
asked by Matt 
physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59.
asked by Matt 
Calculus
∫4 [( ( ln(z) )^ 2)/z] dz ∫[( 7 e^(7 √x))/ √x] dx ∫[(2 x + 5)/( x^2 + 5 x + 2)] dx
asked by Jane 
Accounting Specialized Journals
how to use specialized journals, general ledger, and subsidiary ledger sheets to ... business owner purchased $200 product on account to be resold...what does that correctly look like, please?
asked by Barb 
Math
Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__
asked by Ana 
Accounting Specialized Journals
Store owner makes a $80.00 purchase, goods for resale, and uses check $143. Using Specialized journals, general ledger and subsidiary account, what is the correct posting please.
asked by Barb 
English
Hello. I need some help from a native speaker of English. 1)Is it possible to say "to make a (peace) treaty" or is it "to conclude a treaty"? 2)is it possible to say "to make a visit to Mexico"? 3)is it possible to say "bipartite relations (between the
asked by Ilma 
CJS 210
What are the ethical standards in policing? I'm not exactly understanding what they mean by this
asked by Donald 
algebra
K*T=K*T How would I solve for T?
asked by Jake 
math
At a Amusement PArk you can buy tickets for 12 rides for $15. At that rate, how many tickets would you be able to buy for $22.50?
asked by Serrena 
Exponents
GRE question  What is greater z or 60? z is the degrees of a one of the congruent sidesAn isoceles triangle
asked by Lisa 
selfreflection essay
what is self perceiving society mean
asked by mercy 
chemistry
calculate the molarity of 18.0 ml of h2so4 in 2.0l of solution?
asked by diane 
physics
x=12cm and y=14cm, what is 0
asked by anonymus2 
Math
Find, with justi cation, the smallest integer whose rst digit is 1 and which has the property that if this digit is transferred to the end of the number, then the number is tripled
asked by SkaterGirl 
Math
Fill in the blank so that the given statement is true. The median is 77 65,68,78,82,89,__
asked by Ana 
Accounting Specialized Journals
what does customer pays $150.00 toward account at store. What does that look like using specialized journals, general ledger and subsidiary ledgers please
asked by Barb 
EnglishNo Country For Old Men
I have an essay to write but I need some help on this question. "Comment on both Sheriff Bell's and Moss's wives. How are they alike? What is your opinion of them? What do you learn about each woman's relationship with their husband because they are placed
asked by Jill 
Science
How can i explain the life cycle of nylon?
asked by Laura 
US History
The Government and churches have demoralized, dehumanized massacred , robbed, raped, promised, made treaty? after treaty, and lied to us ... We must now destroy this political machine that man has built to prevent us from selfdetermination. " by Dennis
asked by Anonymous 
algebra
K*T=K*T I need help solving for T. How would I do it?
asked by Jake 
12th grade
I need help in Psychology do you guys do that? Or just ore subjects?
asked by Miranda 
selfreflection essay
am writeing selfrelection essay abt the theme self perceiving society,society perceiving self and i don't know how to start it off?
asked by mercy 
algebra
(ab)(a^2+ab+b^2)
asked by mike 
math
16=2.5k
asked by riley 
science
how much does gravity affects my cannon shot?
asked by cannon ball 
physik
was kÃ¶nnte passieren,wenn man aluminiumstÃ¤be in eine betonmauer einarbeiten wÃ¼rde?
asked by michelle 
science
describe how radioactive isotopes decay
asked by kayla 
language arts
chapters 610 what is the summery of the witch of blackbird pond??? awnswers
asked by person 
World History
Buddhism
asked by Alexis