Questions Asked on
September 28, 2014

Material Sciences
Imagine a container is removed from a hot oven and plunged into cold water. Use your answer from Question 3 to justify which material would be more likely to have better thermal shock resistance. Glass: α=9∗10−6C−1 Pyrex: α=4∗10−6C−1 Which
asked by qwerty 
Material Sciences
The molar crosslink density of a rubber is measured to be 468mol/m3 for a temperature T=300K. What is the Young's modulus of the rubber in MPa? What happens to the modulus of the rubber when the temperature is increased? Young's modulus decreases Young's
asked by qwerty 
math
kx^2 + (k+2)x 3 =0 has roots which are real and positive. Find the possible values that k may have. I understand that I have to use the discriminant to solve this, but I can't seem to get the answer right, so I really need help!!
asked by Anita 
Need help badly, Science
Suppose the incident sunlight at ground level has a power density of 0.87 kW m−2 at noon. What is the maximum rate of loss of water from a lake of area 1.0 ha? (1 ha = 104 m2.) Assume that all the radiant energy is absorbed. any ideas on how do i get
asked by Xavier 
Redox equation
ZnOH4^2 > ZnO2^2 + 2H2O What is the oxidation agent, reducing agent, substance oxidized, and substance reduced? Well, Zn isn't changed either way, so the OH is the only factor left here... I simplified ZnOH4^2 > ZnO2^2 and 2HOH, but still I'm not
asked by Jennzie 
Physics
an object is located a distance d above the surface of a large planet of radius r. at this position, its true weight is one percent less than its true weight on the surface. what is the ratio of d/r?
asked by Bodedio 
To ANY SCIENCE HELPER
1. Describe 2 methods of viral infection 2. How can a virus be helpful to its host? Thanks:)
asked by Nicki 
Geometry
A swimming pool is to be constructed in the space of partially overlapping identical circles. Each of the circles has a radius of 9 m, and each passes through the center of the other. Find the area of the swimming pool.
asked by Carl 
Environmental Science
India’s prime minister puts you in charge of that nation’s population policy. India has a population growth rate of 1.6% per year, a TFR of 2.7, a 49% rate of contraceptive use, and a population that is 71% rural. What policy steps would you recommend,
asked by Aly 
geometry
The volume of the rectangular prism is 280 cubic cm. Its base has the area of 40 sq. cm. What is the volume of the pyramid inside the prism???
asked by Hana 
geometry
The volume of the rectangular prism is 280 cubic cm. Its base has the area of 40 sq. cm. What is the volume of the pyramid inside the prism?
asked by Hana 
physics
A cube of mass m1 = 7.7 kg is sitting on top of another cube of the same size and mass m2 = 0.6 kg while they are both in freefall. Ignoring any air resistance, what is the magnitude of the normal force with which the bottom cube is acting on the top
asked by fresno T 
physics
A person whose mass is m = 60.5 kg steps on a mechanical bathroom scale placed on an inclined plane that makes the angle α = 31.7° with the horizontal. What is the reading on the scale? For this question I used the formula FN=mgcostetha= 60.5x9.8xcos31.7
asked by fresno T 
Theology 10 HELP!
Things in our world that seems hopeless.
asked by Lauren 
chemistry
If He(g) has an average kinetic energy of 7590 J/mol under certain conditions, what is the root mean square speed of F2(g) molecules under the same conditions?
asked by A 
friction
A 40 kg slab rests on a friction less floor.a 10 kg block rests on top of the slab.the coefficient kinetic friction between the block and the slab is 0.40.a horizontal force of 100N is applied on the 10 kg block.find the resulting acceleration of the slab.
asked by mahesh 
physics
To tighten a bolt, you push with a force of 84N at the end of a wrench handle that is 0.24m from the axis of the bolt. What torque are you exerting?
asked by leonardo 
physics
To tighten a bolt, you push with a force of 84N at the end of a wrench handle that is 0.24m from the axis of the bolt. If you move your hand inward to be only 0.10 m from the bolt, find the force that you should exert to achieve the same torque.
asked by leonardo 
math
The ratio of the perimeters of two squares is 1:5. If the area of the bigger square is 250m^2, find the perimeter of the two squares
asked by Mielle 
math
Lane French had a bad credit rating and went to a local cash center. He took out a $100.00 loan payable in two weeks at $106.00. What is the percent of interest paid on this loan?
asked by glen 
English
What are the different parts of speech?
asked by Ken 
Fractions
Jodi is cutting out pieces of paper that measure 8 1/2 inches by 11 inches from a larger sheet of paper that has an area of 1,000 square inches. 1)What is the area of each piece of paper that Jodi is cutting out? 2)What is the greatest possible number of
asked by Kymmy 
English grammar
Two hundred rupees (are/ is) are a lot of money. Ali along with his brother ( go / goes) goes to the shop. My aunt or my uncle ( is / are) is expected today.
asked by ENGLISH  RIYA ?????? 
statistics
a test consists of 10 true or false questions followed by 10 multiple choice questions, each with 5 choices. How many ways can Faith mark her answer to this test?
asked by virginia 
statistics
If a fair die is rolled, what is the probability of getting an even number, a number less than 5, a number larger than 6 and an odd number?
asked by virginia 
Physics
A stone is thrown vertically upward from the top of the tower with a velocity of 15m / s. Two seconds later a second stone is dropped from the top of the tower.if both the stone strike the ground simultaneously find the height of the tower
asked by Anonymous 
Chemistry
A Power plant rated at 800 MegaWatts generates steam at 585 K and discards heat to a river at 295 K. If thermal efficiency of plant is 70% of maximum value, how much heat is discarded to river at rated power? Please help with steps on how to solve this
asked by Levi 
Chemistry colligative properties
Which of the following aqueous solution of equal molality has the lowest freezing point? a. H2SO3 b. NaCl c. NaOH d. Ca(NO3)2 How do you answer this without looking at their i values from textbooks? I know that delta(Fpt) = m * K,f * i and that i is
asked by Levi 
IT
Make a C program that accepts an integer value at the main method from the keyboard and in turn passes the value to a function that squares the number( multiplies is by itself) and to another function that cubes the number ( multiplies by itself twice).
asked by Anonymous 
physics
The figure below shows a train with 3 compartments only. Each of the compartments has a mass of 30 tons . Two of them are motor cars while the other one is a trailer car. Each of the motor cars provides a driving force F. Suppose the train is accelerating
asked by gregory 
geometry
In triangle ABC, ab=5 cm, BC=12 cm and ABC=90 degree, calculate the length of AC.
asked by Bhuvanesh. D 
geometry
In triangle ABC, AB=5 cm, BC=12 cm and angle ABC=90 degree, calculate the length of AC.
asked by Bhuvanesh. D 
Life orientation
Provide five or more ways in which you critically discuss how lifestyle on substance abuse impact on the teenagers
asked by Njabulo 
chemistry
I what this question to be solve.what will be the pressure of 50cm^3 of oxygen gas in a piston initially at a pressure of 2atm when the volume was 500cm^3 at a steady temperature of 300k
asked by bibian cyril 
PROGRAMMING
Make a C program that accepts an integer value at the main method from the keyboard and in turn passes the value to a function that squares the number( multiplies is by itself) and to another function that cubes the number ( multiplies by itself twice).
asked by MEANN 
PROGRAMMING
Make a C program that will generate the output below using the function that will pass the value into the function. 1 4 16 25 36 49 64 81 100
asked by MEANN 
PROGRAMMING
1. Make a C program that will input two integers and then to enter an option as follows: • 1 = to add the two integers. • 2 = to subtract the second integer from the first. • 3 = to multiply the integers • 4 = to divide the first integer by the
asked by MEANN 
PROGRAMMING
Create a C program that contains a function that computes the final price for a sales transaction and return that value to a calling method. The function requires three arguments: product price, salesperson commission rate and customer discount rate. A
asked by MEANN 
chemistry
The structure of tryptophan is shown at the right along with the pK values of the αcarboxyl and αamino groups. (pK1=2.38; pK2=9.39) Tryptophan is a diprotic acid which can exist in three protonated forms: H2A , HA0, and A–. (HA0 consists primarily of
asked by xs 
PreCalculus
1.) Find (f  g)(x) if f(x) = 2x  5 and g(x) = 4. 2.) Given f(x) = 4 and g(x) = 2x  1, find (f  g)(x). Thanks so much! :)
asked by Susie 
Math Homework
Hi! I really need help with these. I tried them on my own but I got really confused. Thanks! 1.) If f(x)=1/x and g(x)=1/x^2, find the domain of g/f 2.) If h(x)=4/(5x+2)^2, find the two functions f and g so that f(g(x))=h(x).
asked by Faith 
Chemistry
GE's light bulb division ordered 100.kg of tungsten for the filaments. If the tungsten comes in a cube what is the volume of the cube? What is the length of each side?
asked by Ray 
trigo
A pendulum of length 10 cm has swung so that theta is the radian measure of the angle formed by the pendulum and a vertical line .Show that the number of centimeters in the vertical height of the end of the pendulum above its lowest position is 20 sin
asked by rai zan 
SCIENCE  PLEASE HELP PLESE
1) Round 578.683 m, 47.3333 kg, and 789.5 cm to four significant figures. 2) Find the weight of a 12.25 kg dog. Round your answer to the correct number of significant figures. Use weight=massxfreefall acceleration. 3) Round 3155.24m, 8.777 73 cm, and
asked by Andra 
ENGLISH  GRAMMAR ????
please guide me to understand phrases with explanation.
asked by riya 
trigo
Obtain an identity for the first function value in terms of the second function value. cos 3x ; cos x
asked by rai zan 
physics
An electron in an atom has a speed of 2.2 × 10^6 m/s and orbits the nucleus at a distance of 5 × 10^11m.a)What is its centripetal acceleration? b)A neutron star of radius 17 km is found to rotate at 5 revolutions per second. What is the centripetal
asked by Diana 
trigo
Can i have a solution on how i can derive on this answer 4cos^3x  3 cos x.....please..
asked by rai zan 
trigo
Use a half measure identity to find the exact value.. Cos t= 1/3 and 0
asked by rai zan 
trigo
Use a half measure identity to find the exact value.. Cos t= 1/3 and 0
asked by rai zan 
math
IF IN AN ISOSCELES TRAPEZIUM,DIAGONAL AC=(8X7)CM AND DIAGONAL BD=(5X+2)CM,THEN FIND THE LENGTH OF AC ?
asked by jawad 
Calculus
A small island is 2 km off shore in a large lake .A woman on the island can row her boat 10 km/hr and can run at a speed of 20 km/hr. If she rows to the closest point of the straight shore, she will land 6 km from a village on the shore. Where should she
asked by Mike 
Calculus Maxima/Minima
An automobile traveling at the rate of 30 ft/sec is approaching an intersection. When the automobile is 120 ft. from the intersection, a truck, traveling at the rate of 40 ft/sec on a road at right angles with the automobile’s road crosses the
asked by Mike 
Chemistry
Use halfcells to balance the following redox reaction, and label the oxidation and reduction halfreactions. Also, note that bromide is a spectator ion and can be eliminated. FeBr(aq) +Mg(s) = Fe(s) + MgBr2(aq) Fe^+2 2e +Br^ e+ + Mg^+2 2e =Fe^+2 2e
asked by Feather 
ENGLISH  SITES
please guide me to understand phrases with explanation.
asked by riya 
unit rates
Julio walks 3 1/2 miles in 1 1/4 hours
asked by Crystal 
math/ unit rates
Kenny reads 5/8 page in 2/3 minute
asked by Crystal 
To ANY SCIENCE HELPER URGENT
1. Describe 2 methods of viral infection 2. How can a virus be helpful to its host? Please this is very urgent, I have finished everything else but these r my last 2 questions that I don't know! Please help! Thanks:)
asked by Nicki 
math/ unit rates
A garden snail moves 1/6 foot in 1/3 hour
asked by Crystal 
Chem
Then, determine the final volume needed to dilute 20.0 ml of 1.00 M NaOH to 0.25 M. Next, find the volume of water which needs to be added. Finally, determine the moles and the mass in grams of NaOH in the solutions. Final volume formula is Vf= mi/mf 20
asked by Feather 
math/ unit rates
A fertilizer covers 5/8 square foot in 1/4 hour.
asked by Crystal 
Physics
An electron in an atom has a speed of 2.2 × 10^6 m/s and orbits the nucleus at a distance of 5 × 10^11m.a)What is its centripetal acceleration? b)A neutron star of radius 17 km is found to rotate at 5 revolutions per second. What is the centripetal
asked by Vivian 
history
does a private( rank) in the Canadian army fight in the war? i saw on some sites the duties of a private in the army, but it did not say if they fought in wars. so i was wondering if a private would fight in the war.
asked by lilly 
chemistry
A sample of gas occupies 17mL at 112 degrees Celsius. Assuming the pressure is held constant, what volume does the sample occupy at 70 degrees Celsius?
asked by Sophie 
english
what does this quote mean "we're not the bogeyman we're made out to be" and what topic of fear can this be related to?
asked by lisa 
statistics
the manager of a football team works for 310 days per year. of this he spends 42 days looking at new player he might buy. what percentage of his working days is this?
asked by Anonymous 
Chemistry
2. The halflife of a radioactive element is important when considering its application in medicine. For example, iodine131 is often used in the imaging of the thyroid. The reason is that iodine is readily absorbed by the thyroid gland. Another reason is
asked by Mickey 
Calculus Minima Problems
A small island is 2 km off shore in a large lake .A woman on the island can row her boat 10 km/hr and can run at a speed of 20 km/hr. If she rows to the closest point of the straight shore, she will land 6 km from a village on the shore. Where should she
asked by Mike 
CHM
we will do a project on this topic ;HPLC with fluorescence detection to quantify the amounts of various preservatives in several kinds of soda. so what can be analyzed ?
asked by Cani 
Economics
What happens to the cash flow statement for a company operating on a calendar year when a sale is made in December but the firm isn’t paid until the following January?
asked by Chloe 
Chem help
Which reaction of ammonia does not involve the nonbonding pair of electrons on the nitrogen atom? A NH3(g) + CH3I(g) → CH3NH 3+ I –(s) B NH3(g) + HCl (g) → NH4Cl (s) C 2NH3(l) + 2Na(s) → 2NaNH2(s) + H2(g) D 2NH3(aq) + Ag+(aq) → [Ag(NH3)2]+(aq)
asked by Ariana 
geometry
Two circles which are not congruent touch externally. the sum of their area is 130¦Ðcm.square and distance between their centers is 14 cm. find radii of circles.
asked by Rohit 
chemistry
Balance following oxidation reduction reactions using oxidation states method? a) Cl2(g) + Al(s) > Al3+(aq) + Cl b.) O2(g) + H2O(l) + Pb(s) > Pb(OH)2(s) c) H+(aq) + MnO4(aq) + Fe2+(aq) > Mn2+(aq) + Fe3+(aq) + H2O(l)
asked by mathew 
maths
When a cake is removed from an oven its temperature is measured at 300 degree F. Three minutes later its temperature is 200 degree F. How long will it take to cool off to a room temperature of 70 degree F?
asked by Armand 
Algebra
Kate wants to buy a new bicycle from a sporting goods store. The bicycle she wants normally sells for $360. The store has a sale where all bicycles cost 5/6 of the regular price. What is the sale price of the bicycle? Please help solve. Thanks
asked by Ms. Stephie 
Algebra
To find the product 3/7 multiplied by 4/9, Cameron simplified 3/7 to 1/7 and then multiplied the fractions 1/7 and 4/9 to find the product 4/63. What is Cameron's error? Please help answer thanks
asked by Ms. Stephie 
physical
A robot probe drops a camera off the rim of a 230 m high eliff on Mars where the free fall acceleration is 3.7 m/s^2. Find the velocity with which it hits the ground.
asked by belida 
religion
who do members of the Jesuit Volunteer Corps work for?I need help,been stuck on this question for,like,15 minutes,I've been searching the internet for 20 minutes.
asked by sierra 
stat
According to 2010 UCR data, Oakland, CA has a murder rate of 22.0 (per 100,000) in 6th place, Washington, DC has a murder rate of 21.9 in 7th place, and Kansas City, MO has a murder rate of 21.1 in 8th place. If we looked at all U.S. cities with a
asked by tavia 
chemisrt
The hemoglobin content of blood is about 15.4g/100mL blood. The molar mass of hemoglobin is about 64500 g/mol, and there are four iron (Fe) atoms in a hemoglobin molecule.Approximately how many Fe atoms are present in the 6 L of blood in a typical adult?
asked by HN 
Physics
A small, single engine airplane is about to take off. The airplane becomes airborne, when its speed reaches 117.0 km/h. The conditions at the airport are ideal, there is no wind. When the engine is running at its full power, the acceleration of the
asked by Molly 
Physics
Two rocks are thrown simultaneously from the top of a very tall tower with identical speeds of v = 7.70 m/s, but in two different directions.One of them is thrown with an angle of 10.0 degrees below the horizontal, the other one at an angle of 50.0 degrees
asked by Molly 
Physics
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the
asked by Jessica 
English
In the myth "When Grizzlies Walked Up Right" explain how the bears lived in relation to each other before and after the introduction of the female into their clan. Please help me
asked by Kayla 
Geometry
I keep getting the same answer but it is wrong. How do I work this? M is the midpoint of AB. The coordinates of A are (4, 2) and the coordinates of B are (9,6). What are the coordinates of M?
asked by Sandra 
High school algebra
A scouting report states that Ben throws a ball 88 mph. Determine how fast Ben throws in feet per second
asked by Anonymous 
chemistry
21.90 kJ/g x 0.1182 g = ?q = energy obtained by combusting salicylic acid. Then calculate the heat capacity of the calorimeter. That is q from above = C/degree c x 2.84 and solve for C, the heat capacity of the calorimeter. q = heat capacity x delta T q =
asked by korko 
chemistry
heat lost by metal + heat gained by water = 0 [mass metal x specific heat metal x (TfinalTinitial)] + [mass water x specific heat water x (TfinalTinitial)] = 0 Substitute and solve for specific heat metal.
asked by korko 
Physics
A plane with a velocity of 111. 9 meters per second at a maximum rate of 6.8 m/s^2 the plane touches the runaway what's the minimum time before it can come to rest? A=6.8m/s^2 V=111.9m/s t=?
asked by Danielle 
science 2 quick questions
1. Describe 2 methods of viral infection 2. How can a virus be helpful to its host? I don't want sites because they don't help, please help me and explain . All my other questions r done but I'm stuck on these 2.
asked by Nicki 
physics
A bullet is fired straight up from a gun with a muzzle velocity of 214 m/s. Neglecting air resistance, what will be its displacement after 8.2 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m
asked by sam 
chemistry
Use Hess's Law and a table of heats of formation to determine the enthalpy for the following reaction. 3SO2(g) + 3H2O(g) + 3/2O2(g) >3H2SO4(l) ΔH = ?
asked by korko 
Physics help please
A gamma ray with 700KeV energy is ComptonScattered from an electron. Find the energy of the photon scattered at 110 degrees, the energy of the scattered electron, and the recoil angle of the electron mp=mass of proton=1.673x10^27 λ=h/mpc(1cosθ)
asked by Sarah 
Math (money)
Brianna spent 1/6 of her money on a movie and $9 on dinner. If she had $16 left, how much money did she spend altogether?
asked by Shawn 
chemistry
Use Hess's Law and a table of heats of formation to determine the enthalpy for the following reaction. 3SO2(g) + 3H2O(g) + 3/2O2(g) >3H2SO4(l) ΔH = ?
asked by korko 
Physics
A meter stick weighs 200 grams and is supported at the center. Three masses of 100, 200, and 150 grams are placed respectively, at the 10cm, 20cm and 60 cm points of the meter stick. To balance the meter stick, where must a 300 grams weight be placed on
asked by Lily 
Physics
Consider two toy cars. Car A starts from rest and speeds up with constant acceleration for a time delta t until it reached a speed of v and then continues to travel at this speed. At the moment car A reaches its maximum speed, car B, starting at rest from
asked by Wes 
chemistry
A sample of unknown metal has a mass of 36.7 g. This metal was placed in boiling water at 96.0oC until the metal had reached the temperature of the water. The metal was then placed in a foam cup with 50.0 g of water in it at 20.0oC. The cup absorbs 42.0
asked by korko 
Estimating Quotients
Carl needs to estimate the quotient 547÷92. Explain how Carl could use compatible numbers to make a reasonable estimate.
asked by Myra 
Physics
A robot probe drops a camera off the rim of a 429 m high cliff on Mars, where the freefall acceleration is 3.7 m/s2. What equation will be appropriate to find velocity?
asked by Elizabeth 
english
Critical Reading Identify the letter of the choice that best completes the statement or answers the question.The excerpt from Midsummer, XXIII, primarily concerns
asked by Anonymous 
physics
A ball is thrown horizontally at 15 m/s from a clifftop 60 m above the sea level. Find: a) the time to land; b) the angle at which it hits the water; ° below the horizontal c) the speed at which it hits the water. m/s
asked by Vivian 
college
The density of an alloy is 5000 kg/m3. What is the density in g/cm3?
asked by Anonymous 
chemistry
how many moles of oxygen are there in 50.0 grams of KClO3? Given: 50.0 g KClO3 Find: ? mol O K= 39.10 g/mol Cl= 35.45 g/mol O= (16.00)x3= 48.00 g/mol Total: 122.55 g/mol KClO3 50.0 g KClO3 x 1 mol KClO3/122.55 g/mol KClO3=0.408 mol KClO3 0.408 mol KClO3 x
asked by J.R. 
English
I need to create a diagram of hell similar to Dantes Inferno. What punishments would teach the following sins a lesson: Liars Thieves Cheaters Abusers Kidnappers Traitors Murderers Fraudsters Assualters
asked by Jane 
math
if all the numbers from 1 to 2013 are written down how many of these will have two or more zeroes next to each other
asked by Pen 
chemistry
If He(g) has an average kinetic energy of 7590 J/mol under certain conditions, what is the root mean square speed of F2(g) molecules under the same conditions?
asked by B 
PreCalc/Trig
Help Please Find (fog)(2) and (f+g)(2) when f(x)= 1/x and g(x)=4x+9
asked by Anonymous 
math
jocelyn got 19 correct answers out of 25 questions on her last test. What percent of the questions did she answer correctly?
asked by john 
Chemistry
A .7178 g sample of a hydrocarbon occupies a volume of 390.7 mL at 65C and 99.2kpa. When the sample is burned in excess oxygen, 2.4267 g CO2 and .4967g H2O are obtained. What is the molecular formula of the hydrocarbon? Write a plausible structural formula
asked by Lisa 
English
I need to turn this into a really good thesis statement . In the myth " When Grizzlies walked Upright" explain how the bears lived in relation to each other before and after the introduction of the female into their clan, and explain how both the bears and
asked by Stephanie 
English
What is a preterite? I am very confused on this. Is a preterite something that describes past events? For example, When I was younger, I liked visiting my grandparents house. If so, what would be the preterite in the sentence? Would it be younger?
asked by Student 
Math URGENT!!
A rectangular garden has an area if 12a^25a2m^2 A.) Write the area as the product of two binomials with integer coefficients B.) the garden is to be completely enclosed by a path 1 m wide. find and simplify an expression for the area of the path C.) the
asked by Maya 
Physics
A bullet is fired straight up from a gun with a muzzle velocity of 312 m/s. Neglecting air resistance, what will be its displacement after 1.4 s? The acceleration of gravity is 9.8 m/s 2 .
asked by Elizabeth 
math analysis
i don't know what to start. Given a number espilon >0, prove there exists a natural number x such that 1/x
asked by victoria 
CALCULUS
I need to find the unit normal vector given: r(t)= ti + (6/t) j where t= 3 I know I need to find the unit tangent vector first, which is r'(t) divided by the magnitude of r'(t). r(t) can be rewritten as ti+ 6t^1 r'(t) = i 6t^2 = i [6/ (t^2)] j For the
asked by Dia 
English
What does in relation to something mean? Can you give me an example?
asked by Anonymous 
computer
you need to access the registry on your windows 7 computer.how do you do this ?
asked by Anonymous 
physics
A Student drops a rock from a bridge to the water 14.7m below. with what speed does the rock strike the water? the acceleration of gravity is 9.8 m/s^2. andswer in units of m/s.
asked by victoria 
PreCalc (Circles). Please help :(
Five concentric circles with radii 1, 2, 3, 4, and 5 are drawn as shown dividing the circle of radius 5 into five regions: a circle of radius 1 and 4 annuuli (rings). What is the probability that a point chosen randomly from within the circle of radius 5
asked by J 
Algebra 2
Two woodworkers, Tom and Carlos, bring in $100 for making a table and $80 for making a chair. On average, Tom must work 3 hours and Carlos 2 hours to make a chair. Tom must work 2 hours and Carlos 6 hours to make a table. If neither wishes to work more
asked by Amy 
PreCalc (Point of Inter.)
A diagonal of a cube is a line segment of maximum length whose endpoints are vertices of the cube. To the nearest degree, what is the angle of intersection Ѳ, 0 < Ѳ
asked by Kat 
stat
Drawing a spade form a regular deck of playing cards and then drawing another spade from the same deck without replacing the first card is this a independent event?
asked by Anonymous 
physics
A rocket blasts off from rest and attains a speed of 59.4 m/s in 14.1 s. An astronaut has a mass of 66.7 kg. What is the astronaut's apparent weight during takeoff?
asked by S 
PreCalc/Trig
Helpp please State the domain and range of each of the following functions: 1. f(x)=1/(x+3) 2. g(x)=√x+6 3. h(x)=x^3+2x+5
asked by Anonymous 
mathcheck my answers?
Give an example of an open equation a + b = c + d How can you use an equation to make a prediction from a pattern? (i don't know) pizza costs $1.50 per slice. Use a table and an equation to represent the relationship between the number of slices of pizza
asked by SkatingDJ 
Physics
Consider two toy cars. Car A starts from rest and speeds up with constant acceleration for a time delta t until it reached a speed of v and then continues to travel at this speed. At the moment car A reaches its maximum speed, car B, starting at rest from
asked by Wes 
philosophy
Was the period of the Renaissance and Scientific Revolution all about "the shock of the new" or was it more about the "recapture of the very old"?
asked by man jfo 
math/help please
Question: Kenny reads 5/8 page in 2/3 minutes. This is unit rates. Please help!
asked by Nina 
physics
A robot probe drops a camera off the rim of a 457 m high cliff on Mars, where the freefall acceleration is 3.7 m/s2. find the time required for the camera to reach the ground. answer in units of s. i don't know if my equation is right: * tfinal= (vinitial
asked by Mueller 
Math
A door frame that appears rectangular has height 80 in., width 32 in., and one diagonal that measures 86in. Is the door frame actually rectangular?
asked by Mack 
math/help please
Question: a garden snail moves 1/6 foot in 1/3 hour. This is unit rates. Please help, I don't get this lesson!
asked by Nina 
math/help please
Question: a fertilizer covers 5/8 square foot in 1/4 hour. This is the last unit rates question. Please explain how you got the answer so I can understand this lesson.
asked by Nina 
English
I'm sorry but after asking for help and looking up several websites on how to write a really good thesis statement, I don't think I can make one. So I am asking can you please help me by writing it. I tried but I came up with three terrible ones. In
asked by Anonymous 
Physics
A system absorbs 1000 Joules of heat and delivers 600 Joules of work, while loosing 100 Joules of heat by conduction to the atmosphere, the change in the internal energy of the system will be. My solution. I used U=Q+A, and my answer was 1600, but its real
asked by Shahab Mirza 
Chemistry
What is the mass of 3.01 x 10^22 iron (II) ions, Fe^2+?
asked by Syndra 
Math
The planet Neptune has a radius of 15000 miles and rotates one revolution every 18 hours. What is the linear speed of a point on its equator, in miles per hours?
asked by Ashely 
Math
A rectangular garden has an area if 12a^25a2m^2 A.) Write the area as the product of two binomials with integer coefficients B.) the garden is to be completely enclosed by a path 1 m wide. find and simplify an expression for the area of the path C.) the
asked by Maya 
Chemistry
Aluminum sulfate reacts with calcium hydroxide (from lime) to form aluminum hydroxide and calcium sulfate. Write the balanced formula unit equation for the reaction.
asked by Ana 
English
How did the manmade environment Olaudah Equiano was forced into shaped his opinions and perspectives towards the first white men he encountered?
asked by Ann 
stats
a hat contains a number od cubes: 15 red, 10 white, 5 blue and 20 black,20 years gone and i am back again. one cube at random. what is the probability that it is: a) a red cube? b) not a red cube? c) a cube that is white or black? d) a cube that is neither
asked by jojo 
Math
A park ride will make 120 revolutions in 160 seconds, at this rate how many revolutions will it make in 40 seconds
asked by Jakailin 
math
Consider two toy cars. Car A starts from rest and speeds up with constant acceleration for a time delta t until it reached a speed of v and then continues to travel at this speed. At the moment car A reaches its maximum speed, car B, starting at rest from
asked by Wes 
chemistry
What is the molar concentration of all ions present in a solution prepared by mixing the following? Assume that volumes of the solutions are additive, and neglect H+ and OH from water. 60.0 mL of 0.25 M KCl and 80.0 mL of 0.85 M NaOH.
asked by Anonymous 
physics
A small relief package is dropped by a helicopter that is descending steadily at 2.0 m/s. a) After 2.5 s, what is the speed of the relief package? b) After 2.5 s, how is the package below the helicopter? I think I need to use the kinematic equations.
asked by dylan 
English
Is this sentence okay? I looked rightward.
asked by Anonymous 
medical coding2
does anyone know the answer the this coding question? This 42 Year Old White Male Who Accidentally Injured His Left Finger On A Circular Saw While Working O At Home In His Garagen Broken Shutters
asked by lynn 
physics
A football is kicked off with an initial speed of 65 ft/s at a projection angle of 45 degrees. A receiver on the goal line 63 yd away in the direction of the kick starts running to meet the ball at that instant. What must be his minimum speed (in
asked by jon 
physics
a tourist being chased by an angry bear is running in a straight line toward his car at a speed of 4.0m/s. the car is d distance away. the bear is 26.0m behind the tourist and running at 6.0m/s. the tourist reaches the car safely. what is the maximum
asked by beatrice 
SCIENCE
A scientist observing a group of spider monkeys noticed that the adult females often spend time picking leaves off of tree branches. The scientist hypothesizes that this behavior is caused by boredom. Is the scientists hypothesis valid? A no, emotions of
asked by Skye 
Science
The flask shown here contains 10.0 ml of HCl and a few drops of phenolphthalein indicator. The buret contains 30ml of 0.130M NaOH. What Volume of NaOH is needed to reach the end point of the titration? I've used m1v1=m2v2, (x)(10.0ml HCl) = (0.130 M/L
asked by Andrew 
pre algebra
A cylinder has a circumference of 16pi inches and its height is half the radius of the cylinder? What is the total surface area of the cylinder? Give answer in terms of pi. do not know how to do this....please help
asked by taylor 
Math quick question!
A rectangular garden has an area if 12a^25a2m^2 A.) Write the area as the product of two binomials with integer coefficients B.) the garden is to be completely enclosed by a path 1 m wide. find and simplify an expression for the area of the path C.) the
asked by Maya 
Physics
A freight train has a mass of 1.3 x10^7 kg. if the locomotive can exert a constant pull of 5.4x10^5 N, how long would it take to increase the speed of the train from rest to 71 km/h? Disregard friction. Answer in units of s.
asked by Karlee 
Chem
Then, determine the final volume needed to dilute 20.0 ml of 1.00 M NaOH to 0.25 M. Next, find the volume of water which needs to be added. Finally, determine the moles and the mass in grams of NaOH in the solutions. Do I take 60 ml and convert it to moles
asked by Feather 
Chem
Use halfcells to balance the following redox reaction, and label the oxidation and reduction halfreactions. Also, note that bromide is a spectator ion and can be eliminated. FeBr3(aq) +Mg(s) = Fe(s) + MgBr2(aq) Fe^+2 2e +Br^ e+ + Mg^+2 2e =Fe^+2 2e
asked by Feather 
Physics
A ball is thrown at 41° below the horizontal from a rooftop of height 65 m. It lands 2 s later. Find: Find: a) its initial speed b) the point of impact with the ground; m from the base of the building c) the angle at which it hits the ground. ° below the
asked by Vivian 
world history
Where did farming first develop? F.Southwest Asia G.southeastern Europe H.India I.China I think it is g but not sure. Is that correct???
asked by Eden S. 
algebra 1 question
Solve. 3/2 x  4 = 16 x = 20 x = 13 1/3 x = 15 1/3 30 i got x = 16 and in decimal form 13.333 and even others! I'm going for 13 1/3 or 15 1/3. Help?
asked by SkatingDJ 
Mechanisms and Machines
How many inversions does a sixbar linkage have?
asked by Anonymous 
earth science
If the earth was made 4.5 billion years ago, how comes we don't have any craters or rocks from that time?
asked by Saige 
French: TO MS SUE OR ANY FRENCH HELPER
Please check & correct my mistakes: In English: One day sarah went shopping. Then she walked to her house Unfortunately it started to rain Fortunately sarah had a jacket All of a sudden sarah fell down Finally sarah arrived at her house In French: Un jour
asked by Nikki 
physic
A ball is launched horizontally at 5 m/s from the top of a 45 m tall building. A man stands at rest 6 m from the base of the building. If there is a 0.3 s reaction time for the man to start moving once he sees the ball launched, find the magnitude of the
asked by Natalie 
physics
Car a starts from rest and speeds up with constant accelleration until it reaches its max speed. Car b starts from rest, at the moment car a is at max speed, and speeds up with constant acceleration. How much time elapses between when car b starts moving,
asked by Jackk 
Understanding Observation and Behavior, Developing
4. To become a successful observer of young children, which of the following techniques is most effective? A. Smile or nod to a child you're observing. B. Let the children know you will be observing them. C. Try to observe each child without being noticed.
asked by daysi 
physics
You and your friend are on the roof of a 20 m tall building investigating a free fall. Your friend releases a small rock from rest. You throw another rock simultaneously with your friend aiming it straight down. (a) What initial speed should you supply to
asked by Jane 
Economics
There are two brothers, Joe and Marc who both like candy. When Joe shops he always spends $10 on candy When Marc shops he always buys 10 pieces of candy. What is Joe's elasticity of demand for candy? Why? What is Marc's elasticity of demand for candy? Why?
asked by Emily 
math
At the movie theatre, child admission is $5.30 and adult admission is $8.70 . On Friday, 155 tickets were sold for a total sales of $1137.70 . How many child tickets were sold that day?
asked by colt 
AP Calc. AB
1.If an arrow is shot upward on the moon with a velocity of 50 m/s its height (in meters) after t seconds is given by H = 50t  0.66t2. With what velocity will the arrow hit the moon? a. 49.5 b. 47 c. 50.1 d. 50 e. 51 2.If an arrow is shot upward on
asked by Rachel 
Social studies
1. what is the story behind the creation of the Proguoio confecteracy 2. how the early American history democracy was influenced by the Iroquois compare the impact Europeans had on the Iroquois
asked by Daphney 
Physics HELP
A ball is thrown horizontally at 15 m/s from a clifftop 60 m above the sea level. Find: a) the time to land; b) the angle at which it hits the water; ° below the horizontal c) the speed at which it hits the water.
asked by Sophie 
Chemistry
What mass of ammonium nitrate is require to produce 145L of N2O at 2850 torr and 42 degree celcius
asked by Paula 
physics
A grasshopper jumps a horizontal distance of 1m from rest, with an initial velocity at a 45 degree angle with respect to the horizontal. Find the initial speed of the grasshopper and the maximum height reached.
asked by zara 
biology
Which of the follow comparisons would be an inaccurate analogy between prokaryotic cells and eukaryotic cells? A  A eukaryotic cell is like a college campus was a prokaryotic cell is like a oneroom schoolhouse B  A eukaryotic cell is like a flip phone
asked by Sue 
geometry
Point C is in the interior of angle ABD. The measure of angle ABD is 40 degrees. The measure of angle DBC is 3x5. If angle ABC is 22 degrees, what is "x"?
asked by David 
statistics
c. The top 10% of the officers in terms of height also make higher salaries than the shorter officers. How tall does an officer have to be to get in that top 10% group? (I.e. what is the height marking off the top 10 percent?)
asked by tom 
statistics
The police department of a major city has found that the average height of their 1,250 officers is 71 inches (μ = 71 in.) with σ = 2.3 inches.
asked by tom 
Math
Julia saw 5 times as many cars as trucks in parking. If she saw 30 total how many were trucks?
asked by Anonymous 
chem
Give the name of the product from complete hydrogenation of each of the following: 2ethyl1hexene
asked by M 
Heath help Plz5 questions
1. A percentile rank represents the percentage of people who scored at or below the test score. True** False 2. People who have high resting heart rates usually have high levels of cardiovascular fitness. True ** False 3. Resting heart rate is usually
asked by Anonymous 
Calculus
What is the derivative of y=2^x?
asked by Anonymous 
community policing
At the turn of the century, a new management technique was developed by Frederick Winslow Taylor, which would later be applied to policing. What is the name of the management style? strategic management, is this right thanks
asked by tood 
physics
A car is moving with a velocity od 10.1m/s [N] while on a ferry that is moving across a lake.if an observer on shore measures the velocity of the car to be 29m/s [N] how quickly is the ferry moving?
asked by Ella 
Physics
A force F acts to the right on a 4.81 kg block. A 2.53 kg block is stacked on top of the 4.81 kg block and can slide on it with a coefficient of friction of 0.2 between the blocks. The table has a coefficient of friction of 0.23. The acceleration of
asked by Ahmed 
physics
An airplane has an air speed of 112m/s [N 20 degrees W] and has a ground speed of 106 m/s [N 25 degrees W]. Find the velocity of the wind.
asked by Ella 
eng
name something so small that you won't expect it to happen ex: death
asked by chris 
physics
A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 118 km away. The radar antenna is pointing upward at an angle of 58.2 ° above the ground. Find (a) the x and (b) the y components (in
asked by Ashley 
Physics
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed. The ball has a mass m = 0.162 kg and moves at v = 4.73 m/s. The circular path has a radius of R = 0.87 m 1)What is the magnitude of the tension in the
asked by Jessica 
Physics
A student swims at 4m/s. She is swimming from west to east across a river that's is flowing 2.2m/s [S]. A) if the river is 100 m wide, what is the quickest time that she can swim the entire width? B) how far downstream will she be? C) if she decides to go
asked by Ella 
Physics
A swimmer, capable of swimming at a speed of 1.44 m/s in still water (i.e., the swimmer can swim with a speed of 1.44 m/s relative to the water), starts to swim directly across a 2.21kmwide river. However, the current is 0.840 m/s, and it carries the
asked by Ashley 
PreCalc
Please help stuck on this one question Find (fog)(2) and (f+g)(2) when f(x)= 1/x and g(x)=4x+9
asked by Anonymous 
chemistry
What volume of a 0.550 M solution of potassium hydroxide can be made with 18.3 g of potassium hydroxide? (Ignore significant figures for this problem.)
asked by Andy 
physics
You and a friend stand on a snowcovered roof. You both throw snowballs from an elevation of 18 m with the same initial speed of 11 m/s, but in different directions. You through your snowball downward, at 40° below the horizontal; your friend throws her
asked by Dina 
science
Which of the follow comparisons would be an inaccurate analogy between prokaryotic cells and eukaryotic cells? A  A eukaryotic cell is like a college campus was a prokaryotic cell is like a oneroom schoolhouse B  A eukaryotic cell is like a flip phone
asked by Anonymous 
Chemistry
a 6 g sample of magnesium was burned in a crucible producing 10 g of magnesium oxide. What mass of oxygen reacted with magnesium to form the 10 g of magnesium oxide?
asked by Darcy 
History
which best describes a result of division of labor in early farming communities? A social roles began to change B irrigation techniques were developed C religion began to develop D wild animals were domesticated My guess is A, but I am not sure. D
asked by Skye 
physics
An electron, starting from rest and moving with a constant acceleration, travels 5.8 cm in 14 ms. What is the magnitude of this acceleration? Answer in units of km/s2
asked by alex 
physics
A hunter wishes to cross a river that is 1.0 km wide and that flows with a speed of 4.9 km/h. The hunter uses a small powerboat that moves at a maximum speed of 9.6 km/h with respect to the water. What is the minimum time necessary for crossing?
asked by jo 
History
What is a characteristic of civilization? A bronze tools and weapons B an army C art and literature D government I don't know whether it's C or D.
asked by Skye 
Algebra
Adding and subtracting polynomials. Can someone help me solve this problem? 5x^3 . 2x^2  10x^4 + 3x^5 + 3x .(2)x^4 . = The dot means to multiply. Thank you.
asked by Alex 
physics
An electron in the cathode ray tube of a tele vision set enters a region where it acceler ates uniformly from a speed of 30100 m/s to a speed of 3.82 × 106 m/s in a distance of 2.97 cm. What is its acceleration? Answer in units of m/s2
asked by alex 
Chemistry
During recrystallization, an orange solution of a compound in hot alcohol was treated with activated carbon and then filtered through fluted paper. On cooling, the filtrate gave gray crystals, although the compound was reported to be colorless. Explain why
asked by Vivian 
Earth science
A sphere was dropped into water in a graduated cylinder as shown in the following diagram.The water level rose th the new level shown .What is the volume of the sphere
asked by Anonymous 
Math
F(x)=2sin(3x/23pi/4)+2
asked by Jade 
Physics help please
A student swims at 4m/s. She is swimming from west to east across a river that's is flowing 2.2m/s [S]. A) if the river is 100 m wide, what is the quickest time that she can swim the entire width? B) how far downstream will she be? C) if she decides to go
asked by Ella 
physics help please
An airplane has an air speed of 112m/s [N 20 degrees W] and has a ground speed of 106 m/s [N 25 degrees W]. Find the velocity of the wind.
asked by Ella 
public speaking
Medium that carries message signals from senders to receivers of communication is
asked by paula 
math.help pls
find the limit if f((8+h)f(8))/h .if f(x)= (4722 x^2)^1/3.
asked by denial 
physics
A slowly moving train with 15.0 mlong flatcars is passing a station at 11.0 km/h. A person on the station platform tosses rocks onto the moving flatcars at the rate of one every second. If the first rock just hits the front edge of one car, how many
asked by George young 
Algebra
How do I simplify this problem. (2nr  nr^2)r  (2nr  nr^2) . 2r
asked by Alex 
World History
Where did farming first develop? A.Southwest Asia B.southeastern Europe C.India D.China I think it is A. Am i correct?
asked by Eden S. 
Business math
Calculate the cash discount and the net amount due for the following transaction. Amount of Invoice Terms of Sale Cash Discount Net Amount Due $12,660.00 2/10, n/45 $ $
asked by Connie 
statistics
past history indicates that an average of 1.2 calls are received per minute. What is the probability of 3 or more calls per minute
asked by isaiah 
PHI208
Noddings claims that most young men join the military for which of the following reasons? To take part in destruction To kill other humans To find meaning in life They had nothing better to do
asked by Gen 
PHI208
1. Noddings claims that care ethics does which of the following? Focuses on ways to justify war Focuses on ways to combat war Focuses on events as they are and as they occur Focuses on rules that govern morality 2. According to Friedman, this is a typical
asked by Gen 
math
how do I solve 28  9x = 12  11x I tried adding 9x to both sides adding 11x to both sides and doing a million different methods and after i got an answer I went to check it and it was wrong I really don't understand how to do these types of equations
asked by malaina 
PHI208
In Held’s article it is claimed that 1. Hobbes conceives of humans in the state of nature as Creative creatures who work with one another to establish communities Fully grown and having no ties to any other humans Interested in the wellbeing of the
asked by jamie 
physic
As discussed in Example 47, the archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth. Suppose the archerfish squirts water with a speed of 1.4 m/s at an angle of 50.0° above
asked by Dina 
algebra
You are the payroll manager for Euro Couture, a manufacturer of women's apparel. Your workers are paid per garment sewn on a differential piecework schedule as follows. Pay Level Garments Produced Rate per Garment 1 150 $3.60 2 51100 $4.25 3 101150
asked by Tiffani 
algebra
as part of her training routine for basketball, shaylle alternates between cycling and running for exercise. she cycles at a rate of 14 mph and runs at a rate of 8 mph. if she spends 8.5 hours exercising and covers a total of 101 miles, how much time did
asked by dave 
physics
A motorcycle has a constant speed of 21.6 m/s as it passes over the top of a hill whose radius of curvature is 100 m. The mass of the motorcycle and driver is 392 kg. Find the magnitude of (a) the centripetal force and (b) the normal force that acts on the
asked by Natalie 
Physics
Which of the following are the correct units for mass? Tons, u, g, slugs, dyn, lb, oz, kg I put g, slugs, and kg but got it wrong. What part do I have wrong?
asked by Sandra 
math
Write 4 names for 8? This is 2nd grade homework.
asked by morgan 
homework
can someone please help President Clinton's campaign slogan, "100,000 Cops" had nothing to do with communityoriented policing ¨ false
asked by tood 
Physics
A projectile is launched upward at 26m/s at 30 degrees from the horizontal. The whole path of the projectile takes place over level ground. How much time will the projectile be in the air?
asked by Chelsea 
Geography
How does location affect climate?
asked by Adriana 
Problem solving
I was watching the street, there were mopeds(2 wheels) bikes(2 wheels), tricycles(3 wheels), taxis(4 wheels) and big trucks(6 wheels). I counted as they went past a total of 60 in 5 minutes. I notice the following about the vehicle. Every second was a
asked by Malia 
World History Answer Check
1. What was the overall effect of Napoleon's Civil Code? A: The overall effect of Napoleon's Civil Code was to erode the remnants of the feudal system by further weakening the traditional power of the nobility and clergy. 2. Why did being a sea power help
asked by Victoria 
MATH
Write the equation of a horizontal line that passes through (3, 8). Describe the slope.
asked by Anonymous 
Find the pattern problem solving
I was watching the street, there were mopeds(2 wheels) bikes(2 wheels), tricycles(3 wheels), taxis(4 wheels) and big trucks(6 wheels). I counted as they went past a total of 60 in 5 minutes. I notice the following about the vehicle. Every second was a
asked by Malia 
World History
Why was AnneLouiseGermaine de Staël significant? A: ?
asked by Victoria 
math
out of 32 students in a class, 5 said they rode their bikes to school. Based on these results, how many of the 800 students ride their bikes to school?
asked by tim 
Finite
Assume that the producer has 7 skits and 5 commercials available. Skits can't be repeated, commercials can.
asked by Jessica 
writing/ macolm
What new life did Malcolm pursue i n Roxbury, Massachusetts? What changes were visible in Malcolm’s clothing? What were the most negative consequences f or Malcolm in choosing that lifestyle? During his incarceration, what did Malcolm do?
asked by jenny 
Math
What type of function is f(x)=1.3^x? Also, what type of function is f(x)=(x5)/(x^22x+3)?
asked by Sammy 
discrete distribution
Find the mean and the standard deviation of the number of hours parked. (Round your intermediate values and final answers to 3 decimal places.)
asked by Anonymous 
English
Please help with the subject and predicate of the sentence below??? despite news reports to the contrary, manufacturing jobs in the united states are expanding, which is a solid indicator of a growing economy
asked by mother helping daughter 
Chemistyr
A 55.29g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? (Ignore significant figures for this problem.)
asked by Andy 
Chemistry
A 55.29g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? (Ignore significant figures for this problem.)
asked by Andy 
Chemistry
15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.23M lead(II) nitrate solution. What mass of precipitate will form?
asked by Andy