Questions Asked on
October 23, 2011

chemistry 105
Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)>2LiN(s) What mass of lithium (in g ) is required to react completely with 59.9 mL of N2 gas at STP?
asked by JULIE 
Trigonometry
Prove identity. Sec(pix)=sec x
asked by ALISON 
chemistry 105
A 260mL flask contains pure helium at a pressure of 743 torr. A second flask with a volume of 480 mL contains pure argon at a pressure of 715 torr. If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure
asked by JULIE 
Calculus
A ship sailing parallel to shore sights a lighthouse at an angle of 12 degrees from its direction of travel. After traveling 5 miles farther, the angle is 22 degrees. At that time, how far is the ship from the lighthouse?
asked by Tim 
PHYSICS
The figure shows a ball with mass m = 0.405 kg attached to the end of a thin rod with length L = 0.516 m and negligible mass. The other end of the rod is pivoted so that the ball can move in a vertical circle. The rod is held horizontally as shown and then
asked by Anonymous 
Physics
A 0.30 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.20 kg puck that is initially moving along the x axis with a velocity of 2.8 m/s. After the collision, the 0.20 kg puck has a speed of 0.5 m/s at an angle of θ = 53°
asked by Seth 
Math
what is the perimeter of a right triangle with legs 6 cm and 3cm , leave the answer in simplest radical form
asked by Kestrel 
Physics Honors
How long will it take a shell fired from a cliff at an initial velocity of 800 m/s at an angle 30 degrees above the horizontal to reach the ground 150 meters below?
asked by Allison 
Physics
A lawn mower has a flat, rodshaped steel blade that rotates about its center. The mass of the blade is 0.65kg and its length is 0.55m. What is the rotational energy of the blade at its operating angular speed of 3450 rpm? If all of the rotational kinetic
asked by Jc 
Chemistry 105
Ozone is depleted in the stratosphere by chlorine from CF3Cl according to the following set of equations: CF3Cl+UV light>CF3+Cl Cl+O3>ClO+O2 O3+UV light>O2+O ClO+O>Cl+O2 What total volume of ozone measured at a pressure of 22.0 mmHg and a
asked by JULIE 
Science physics
An iron anchor weighs 250 pounds in air and has a weight density of 480 lbs/ft3. If it is immersed in sea water that has a weight density of 64 lbs/ft3, how much force would be required to lift it while immersed? I know the answer is 217 pounds but I need
asked by Hannah 
Chemistry 105
The air in a bicycle tire is bubbled through water and collected at 25 C. If the total volume of gas collected is 5.65 L at a temperature of 25 C and a pressure of 729 torr, how many moles of gas was in the bicycle tire?
asked by JULIE 
chemistry
an 8.5g ice cube is placed into 255g of water. Calculate the temp change in the water upon the complete melting of the ice. Hint: Determine how much heat is absorbed by the melting ice and then use q = mc^T to calculate the temp change of the 255g of water
asked by Monique 
Science
1. How much heat energy is lost by 3 kg of water when it cools from 80 degrees C to 10 degrees C? 2. A 300 g piece of aluminum is heated from 30 degrees C to 150 degrees C. What amount of heat energy is absorbed? 3. Determine the temperature change in each
asked by Debra 
Physics
YoYo man releases a yoyo from rest and allows it to drop, as he keeps the top end of the string stationary. The mass of the yoyo is 0.056 kg, its moment of inertia is 2.9 X 10^5 kg X m^2 and the radius r of the axle the string wraps around is 0.0064 m.
asked by Joseph 
Chemistry 105
A sample of N20 gas has a density of 2.65 g/L at 298 K. What must be the pressure of the gas (in mmHg )?
asked by JULIE 
Physics
In Fig. 621, a slideloving pig slides down a certain 37° slide in twice the time it would take to slide down a frictionless 37° slide. What is the coefficient of kinetic friction between the pig and the slide?
asked by Ted 
Chemistry
How many grams of a 250 g sample of thorium  234 would remain after 40 days had passed?
asked by Divine 
Physics
A wheel of radius R starts from rest and accelerates with a constant angular acceleration alpha about a fixed axis. At what time t, will the centripetal and tangential accelerations of a point on the rim have the same magnitude?
asked by Jc 
Chemistry 105
A heliox deepsea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 9.3 atm?
asked by JULIE 
Physics Honors
An egg is thrown horizontally off the roof of SI, which is 60 meters high, with an initial velocity of 6.5 m/s. How long does it take to hit the ground? How far does it go in the x direction?
asked by Allison 
physics
A child pedals a tricycle, giving the driving wheel an angular speed of 0.373 rev/s. If the radius of the wheel is 0.260 , what is the child's linear speed?
asked by Joseph 
statistics
Seventy million pounds of trout are grown in the U.S. every year. Farmraised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7.5 grams of fat per pound. A random sample of 34 farmraised trout is selected. The mean fat
asked by Jen 
Physics Honors
A pool ball leaves a 0.60 meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground and the horizontal distance between the table's edge and the ball's landing location.
asked by Allison 
Chemistry 105
Consider the following chemical reaction. 2H2O(l) >2H2(g)+O2(g) What mass of H2O is required to form 1.6 L of O2 at a temperature of 330 K and a pressure of 0.954 atm?
asked by JULIE 
Chemistry 105
Use the molar volume of a gas at STP to calculate the density (in g/L ) of carbon dioxide gas at STP.
asked by JULIE 
Math
the height , h(t) in metres of the trajectory of a football is given by h(t) = 2+28t4.9t^2, where t is the time in flight, in seconds . Determine the maximum height of thefootball and the time wehn the height is reached
asked by Poppy 
Physics
The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about .840 s longer to complete 365 revolutions than it did in the year 1906. What was the average acceleration of the Earth
asked by Jack 
Physics Honors
A ball is kicked horizontally at 8.0 m/s from a cliff 80 meters high. How far from the base of the cliff will the stone strike the ground?
asked by Allison 
Psychology
If there is no conflict resolution in place, a career minded person must learn effective ways of resolving conflict in the workplace by becoming a better communicator and listening. These two steps are great preventive measures in conflict cases. Workers
asked by Sharon 
Physics Honors
Jason Kendall throws a baseball with a horizontal component of velocity 25 m/s. It takes 3.0 s to come back to its original height. Calculate its horizontal range, its initial vertical component of velocity and its initial angle of projection.
asked by Allison 
Math
An even function f has a vertical asymptote at x = 3 and a maximum at x = 0. Which of the following could be f? a. f(x)=(x)/(x^29) b. f(x)=(x)/(x3) c. f(x)=(x^2)/(x^2+9) d. f(x)=(x^2)/(x^481)
asked by HC 
Chemistry
Which ion is more strongly hydrated , 1)Fe3+ and Fe2+? 2)Li+ and Na+ ? Thank for helping!
asked by Namis 
Physics Honors
A soccer ball is kicked horizontally off a 22.0 meter high hill and lands a distance of 35 meters from the edge of the hill. Determine the initial horizontal velocity of the soccer ball.
asked by Allison 
Alegra 2
A baseball is hit at a point of 3 feet above ground at a velocity of 100 feet per second and an angle of 45 degrees. The path of the baseball is h(x)= 0.0032(x156.25)squared+87, where x and h(x) are measured in feet. A. what is the baseball's maximium
asked by Emily 
chemistry
write ionic equation for : potassium carbonate and sodium sulfate sulfuric acid and strontium chloride potassium phosphate and sodium hydroxide sodium hydroxide and strontium chloride
asked by ceezale 
phsics
a 4kg box is pushed across a level floor with a force of 60n for a displacemen of 20m then lifted to a height of 3 m. what is total work done on the box?
asked by kelsie 
Chemistry 105
A gas mixture with a total pressure of 745 mmHg contains each of the following gases at the indicated partial pressures: CO2, 257 mmHg; Ar, 123 mmHg; and O2, 160 mmHg. The mixture also contains helium gas. What is the partial pressure of the helium gas?
asked by JULIE 
Science physics
An aluminum bar weighs 17 pounds in air. How much force is required to lift the bar while it is immersed in gasoline? The weight of aluminum is 170 pounds/ft3 and that of gasoline is 42 pounds/ft3. I know that the answer is 12.8 pounds but how do I get to
asked by Hannah 
Grade 11 physics
a string can hold up 12 kg without breaking. You tie the string to a 30kg object sitting on ice and use it to pull the object horizontally 22m. Calculate the minimum possible time to complete the task
asked by John 
Physics
As a car rounds the top of a hill at a speed of 29.03 m/s, it very briefly loses contact with the pavement. This section of the road has an approximately circular shape (see figure). Find the radius r.
asked by Marion 
physics
The coefficient of static friction between the 3.0 kg crate and the 31° incline shown below is 0.300. What is the magnitude of the minimum force, F, that must be applied to the crate perpendicularly to the incline to prevent the crate from sliding down
asked by sammy 
physicsURGENT
An 85 cm long pendulum with a 0.80 kg bob is released from rest at an initial angle of θ0 with the vertical. At the bottom of the swing, the speed of the bob is 2.8 m/s. What angle does the pendulum make with the vertical when the speed of the bob is 1.4
asked by jack 
Chemistry
2h2s g 3o2 g 2so2 g 2h2o g H=1036KG/MOL calculate enthalpy change in kj when 18.2 g of hydrogen sulfide are burned
asked by Tyler 
physics
A loaded penguin sled weighing 75 N rests on a plane inclined at angle θ = 24° to the horizontal (Fig. 628). Between the sled and the plane, the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.13. (a) What is the
asked by Taylor 
Physics
A centrifuge is a common laboratory instrument that separates components of differing densities in solution. This is accomplished by spinning a sample around in a circle with a large angular speed. Suppose that after a centrifuge in a medical laboratory is
asked by Jc 
physics
How long does it take light to travel through a 3.2mm thick piece of window glass?
asked by Paige 
Physics
Need help on part B! A 2.50 mass is pushed against a horizontal spring of force constant 26.0 on a frictionless air table. The spring is attached to the tabletop, and the mass is not attached to the spring in any way. When the spring has been compressed
asked by Cameron 
chemistry
A gas mixture with a total pressure of 745mmHg contains each of the following gases at the indicated partial pressures: CO2, 257 mmHg; Ar, 123mmHg; and O2, 160 mmHg. The mixture also contains helium gas. What is the partial pressure of the helium gas? What
asked by samantha(very important) 
Physics
A loaded penguin sled weighing 66 N rests on a plane inclined at angle θ = 24° to the horizontal (Fig. 623). Between the sled and the plane, the coefficient of static friction is 0.22, and the coefficient of kinetic friction is 0.13. (a) What is the
asked by Ted 
Science physics
A balloon weighing 80 kg has a capacity of 1200 m3. If it is filled with helium, how great a payload can it support? The density of helium is 0.18 kg/m3 and the density of air is 1.30 kg/m3. Express your answer in Newtons. I know the answer is 12, 400
asked by Hannah 
chem 105
A gas mixture with a total pressure of 745mmHg contains each of the following gases at the indicated partial pressures: CO2, 257 mmHg; Ar, 123mmHg; and O2, 160 mmHg. The mixture also contains helium gas. What is the partial pressure of the helium gas? What
asked by JULIE 
Physics
A large merrygoround completes one revolution every 17.5 s. Compute the acceleration of a child seated on it, a distance of 5.80 m from its center.
asked by Marion 
physics
A 10 N horizontal force pushes a block weighing 4.9 N against a vertical wall (Fig. 626). The coefficient of static friction between the wall and the block is 0.55, and the coefficient of kinetic friction is 0.35. Assume that the block is not moving
asked by Andrea 
Chemistry
0.150 L of 0.490 M H2SO4 is mixed with 0.100 L of 0.250 M KOH. What concentration of sulfuric acid remains after neutralization?
asked by Harley 
Physics Honors
A pitcher throws a fast ball horizontally at 42.1 m/s How far does it drop before crossing the plate, 18.3 meters away?
asked by Allison 
physics
Compute the orbital radius of an earth satellite that has an equatorial orbit and always remains above a fixed point P on the earth's surface. Communication satellites have such "geosynchronous" orbits (see figure). These satellites are used to relay radio
asked by kellie 
physics
objects of masses m1=4 kg and m2=9kg are connected by a light string that passes over a frictionless pulley. the object m1 is held at rest on the floor and m2 rests on a fixed incline of delta=40 degrees. the objects are released from rest and m2 slids
asked by peter 
chemistry
3. The solubility of BaSO4 at 25C is 9.04 mg/L. Based on this, how many grams and moles of BaSO4 remained dissolved in the 100 mL of solution? What percent of your yield does this represent?
asked by joan 
Math
1) Let f(x)=9x2;g(x)=under square root 3x+7. Find each of the following. A) domain of (f+g) B) domain of fg C) domain of f/g (my answer is all r real number am i right?) 2) Let f(x)=3x2;g(x)=5x+1. Compute the indicated value. A) (fogof)(2) i don't get
asked by Lorry 
Algebra
Find the payment necessary to amortize a 4% loan of $900.00 compounded quarterly , with 11 quarterly payments?
asked by barb 
Physics
An amusement park ride called the Rotor consists of a room in the shape of a vertical cylinder (2.10 m in radius) which, once the riders are inside, begins to rotate, forcing them to the wall. When the room reaches a speed of one rotation every 1.36 s, the
asked by Kellie 
Chemistry
Rank the following solutions in order of increasing acidity. 1 M phenol 1 M boric acid 1 M cyanic acid 1 M formic acid 1 M hydrochloric acid 2. Rank the following solutions in order of increasing basicity. 1 M C3H5O3Na 1 M KF 1 M KOCN 1 M KOCl All I know
asked by Neha 
algebra
Find the payment necessary to amortize a 4% loan of $900.00 compounded quarterly , with 11 quarterly payments?
asked by beechst 
Physics Honors
A football is kicked with an initial velocity of 25 m/s at an angle of 45 degrees with the horizontal . Determine the time of flight, the horizontal distance, and the peak height of the long jumper.
asked by Allison 
Geometric progression
The second term of a geometric progression is 12 more than the first term given that the common the ratio is half of the first term. Find the third term of the Geometric progression
asked by Anonymous 
Chemistry
If 16.3 kilograms of Al2O3(s), 60.4 kilograms of NaOH(l), and 60.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced?
asked by Harley 
algebra
Can anyone solve A= 1/2h(a+b) solve for h
asked by chris 
Chemistry
What are the half reactions for NH4ClO4 + Al = Al2O3 + AlCl3 + NO? I can balance it once i have the half reactions
asked by Sam 
Physics
In Fig. 634, blocks A and B have weights of 46 N and 23 N, respectively. (a) Determine the minimum weight of block C to keep A from sliding if μs between A and the table is 0.21. (b) Block C suddenly is lifted off A. What is the acceleration of block A
asked by Tom 
Business English
What is the best reason to omit the reason for the refusal in a negative message? A. The reader may not think of the reason. B. The reason reflects poorly on the company. C. The reason benefits the reader, but not the writer. D. The reason is watertight.
asked by Diana 
Physics
A bucket of mass 2.20 kg is whirled in a vertical circle of radius 1.40 m. At the lowest point of its motion the tension in the rope supporting the bucket is 30.0 N. Find the speed of the bucket. How fast must the bucket move at the top of the circle so
asked by Lilly 
HELPphysics
Walking by a pond, you find a rope attached to a tree limb 5.1 m off the ground. You decide to use the rope to swing out over the pond. The rope is a bit frayed but supports your weight. You estimate that the rope might break if the tension is 82 N greater
asked by Anonymous 
Maths urgent help needed!
A rectangular tank measures 60cm by 40cm by 30cm. It is half filled with water. Water is added to the tank at a rate of 13litres per minute and drained out at 9litres per minute. Find the volume of water in the tank after 7 minutes.
asked by joi 
Cranes
08/09/2005 Physics A crane is lifting a 200 pound object. The crane boom is 50 ft long. The boom forms an 85 degree angle with the horizontal. What is the torque applied to the crane boom?
asked by Jerry 
Physics
The Crab Nebula One of the most studied objects in the night sky is the Crab nebula, the remains of a supernova explosion observed by the Chinese in 1054. In 1968 it was discovered that a pulsara rapidly rotating neutron star that emits a pulse of radio
asked by Joseph 
Algebra 2
The surface area S (in square centimeters) of a large dog can be approximated by the model S = 11.2m^2/3 where m is the mass (in grams) of the dog. A Labrador retriever’s mass is about three times the mass of a Scottish terrier. Is its surface area also
asked by jay 
geometry
An isosceles triangle has a base of 9.8 units long. If the congruent side lengths have measures to the first decimal place, what is the shortest possible length of the sides.
asked by Billy 
Pysics
A device for training astronauts and jet fighter pilots is designed to rotate a trainee in a horizontal circle of radius 12.0 m.If the force felt by the trainee on her back is 7.80 times her own weight, how fast is she rotating? Express your answer in m/s.
asked by Mel 
Physics
After fixing a flat tire on a bicycle you give the wheel a spin. Its initial angular speed was 7.35 rad/s and it rotated 15.0 revolutions before coming to rest. What was the average angular acceleration? For what length of time did the wheel rotate?
asked by Jackie 
Math
Jackie mows a strip of uniform width around her 25 m by 15 m rectangular lawn and leaves a patch of lawn that is 60 percent of the original equation. what is the width of the strip
asked by Kestrel 
Math
Write a function rule for the area A(n) of a square when you know length n of a side?
asked by Jenny 
Science physics
How much does a 20ft x 10ft x 8ft swimming pool filled with water weight? Assume the water has a weight density of 62 lbs/ft3. I know the answer is 99,200 pounds but how do I get that answer? Thanks
asked by Hannah 
Geology
For my final I am to write a paper discussing the following : Select some product produced in your city or state that is made from earth, mineral, or energy resources. One example would be the tar paper used as a building material. (Do not use this
asked by Hannah 
Chemistry
A concept map was to be created on acids and bases. The concept terms that were given to use were: aqueous solution,bases,acids,ions,weak bases, strong bases, strong acids, weak acids,dissociation, weak electrolyte, strong electrolyte,reaction,salt,
asked by Hannah 
math
determine the maximum area of a rectangular field that can be enclosed by 2400 m of fencing
asked by Poppy 
Physics
A person pushes horizontally with a force of 190 N on a 67 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.23. (a) What is the magnitude of the frictional force? (b) What is the magnitude of the crate's acceleration?
asked by Ty 
statistics
Seventy million pounds of trout are grown in the U.S. every year. Farmraised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7.5 grams of fat per pound. A random sample of 34 farmraised trout is selected. The mean fat
asked by Jen 
norma
A person standing at the edge of a seaside cliﬀ kicks a stone over the edge with a speed of 12 m/s. The cliﬀ is 41 m above the water’s surface, How long does it take for the stone to fall to the water? The acceleration of gravity is 9.81 m/s 2 .
asked by norma 
Algebra 2
You and your friend are both knitting scarves for charity. You knit 8 rows each minute and already have knitted 10 rows.Your friend knits 5 rows each minute and has already knitted 19 rows. When will you both have knitted the same number of rows? How do I
asked by JOY 
chemistry
If 40.0 g of water at 70 degrees C is mixed with 40.0 g of ethanol at 10.0 degrees C, what is the final temperature of the mixture? How does one go about solving this problem? I found the specific heat of water and ethanol, but now what?
asked by TheQuestion 
STATISTICS
Ttest independent that people can hear better after having eaten a large meal A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly assigned to eat either a large meal or a small meal.
asked by DAISY B 
Chemistry
In the CO3^2 ion, all three CO bonds have identical bond lengths of 136 pm. Why?
asked by Joe Schmo 
chemistry
Calculate the volume occuiped by 7g of nitrogen gas at 27degree centigrade and 750 mm of Hg pressure?
asked by zhalia moon 
Physics
What is the acceleration experienced by the tip of the 1.5 cmlong sweep second hand on your wrist watch?
asked by Lilly 
physics
A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due to the force of friction. A. What was the acceleration of the car. B. What was the car’s initial momentum? C. What was its final momentum? D. What was the change in momentum of the
asked by Anonymous 
law
what is the actus reus and mens rea in the three little pigs?
asked by Rebecca 
Chem 105
A 1.5L container of liquid nitrogen is kept in a closet measuring 1.3 m by 1.3 m by 1.8 m. Assuming that the container is completely full, that the temperature is 22.3 C, and that the atmospheric pressure is 1.2 atm , calculate the percent (by volume) of
asked by JULIE 
Algebra
For which value of b would make the equation 3x2=bx6 have infinitely many solutions? How would I find the values? The choices are 6,3,3,6.
asked by Shadow 
Physics Honors
A bullet is fired from a rifle, emerging at 340 m/s. It strikes a sandbag some distance away, having lost 10% of its velocity due to air resistance. if it penetrates the sandbag to a depth of 12 meters, how long did it take for the bullet to come to rest
asked by Allison 
geometry
triangle ABC is an isosceles right triangle. The endpoints of the hypotenuse of ABC are A(4,7)B(8,1). Find the possible coordinates for the vertex C
asked by Emily 
Chemistry
A student needs 1.0L of buffer solution with a PH =10.0 .She selects the HCO3^ >CO3^2 buffer system. The K(HCO3^) =5.6x10^11 . what is the [HCO3^]/[CO3^2]ratio for the buffer?
asked by samson 
Chemistry
I need to balance this equation by redox reactions with half reactions method NH4ClO4 + Al > Al2O3 + AlCl3 + NO
asked by Krystal 
physics
A jogger jogs around a circular track with a diameter of 130 meters in 27 minutes. What is the distance around the track?
asked by Judy 
Algebra 2
A store sells pens and note pads in packages. The price of a package of 8 pens and 3 notepads is 4.25. The price of a package of 15 pens and 10 notepads is 11.25. The store is running a sale on a package of 1 pen and 1 notepad for 1.10. Is the sale price a
asked by JOY 
Algebra
Is the square root of 362a real number, irrational number, rational number, integer, whole number and or counting number?
asked by Pat 
Algebra 2
As a rule of thumb, the power P (in horsepower) that a ship needs can be modeled by P = d^2/3 • s^3 / c where d is the ship’s displacement (in tons), s is the normal speed (in knots), and c is the Admiralty coefficient. If a ship displaces 30,090 tons,
asked by jay 
accounting
:The balance sheet for Glenwood Corporation at December 31, 2011, showed the following subtotals: Current Assets $140,000 Current Liabilities 80,000 Property & Equipment 420,000 Total Stockholders' Equity 420,000 Retained Earnings 120,000 Total Liabilities
asked by Anonymous 
chemical question
a) Sour milk pancakes do not taste sour when sour milk and baking soda are substituted for sweet milk and baking powder . Explain. b) How would these pancakes taste if sour milk and baking powder are used? c) How would they taste if sweet milk and baking
asked by Roger 
Physics
Pigeons are bred to display a number of interesting characteristics. One breed of pigeon, the "roller," is remarkable for the fact that it does a number of backward somersaults as it drops straight down toward the ground. Suppose a roller pigeon drops from
asked by Joseph 
Pre Calculus
Exponential and log functions What initial investment at 8.5% compounded continuously for 7 years will accumulate to 50,000?
asked by Josh 
Math
Betty made 3/4 of the baskets she attempted in a basketball game. Which other ratio is equivalent to the number of baskets Betty made? A) 6/12 B) 9/12 C) 12/20 D) 18/20 Can someone explain please.
asked by Leslie 
Physics
A warehouse worker exerts a constant horizontal force of magnitude 89.0 N on a 43.0 kg box that is initially at rest on the horizontal floor of the warehouse. When the box has moved a distance of 1.60 m, its speed is 1.10 m/s. What is the coefficient of
asked by Tom 
Physics
A student, crazed by final exams, uses a force of magnitude 86 N and angle θ = 61° to push a 5.2 kg block across the ceiling of his room, as in Figure 652. If the coefficient of kinetic friction between the block and the ceiling is 0.34, what is the
asked by Tom 
physics
the small piston of a hydraulic press has an area of 7.0 cm squared. if the applied force is 30.0 N, find the area of the large piston to exert a pressing force of 4000 N
asked by maria 
Math
Determine the values of k for which the function f(x)=4x^23x+2kx+1 has 2 zeros
asked by Kestrel 
Chemistry 105
An experiment shows that a 114 mL gas sample has a mass of 0.168 g at a pressure of 697mmHg and a temperature of 30 C. What is the molar mass of the gas? in g/mol
asked by JULIE 
math
How do i solve for this identity..... cos2theta=2sec^2theta/sec^2theta
asked by Gregor 
Art History
Can anyone tell me the styles of the Prehistoric Art Period, Art of ancient near east, art of ancient aegean, and ancient egyptian art?????
asked by Rebecca 
Statistics
Suppose you know ó and you want an 85 percent confidence level. What value would you use to multiply the standard error of the mean by?
asked by Phil 
MATH
THE BASE AND HEIGHT OF A TRIANGLE ARE IN THE RATIO 5:3. IF THE AREA OF THE TRIANGLE IS 67.5 SQUARE METRE; FIND ITS BASE AND HEIGHT.
asked by RIYA 
Chemistry
What are the half reactions for NH4ClO4 + Al = Al2O3 + AlCl3 + NO? I can balance it once i have the half reactions
asked by Sam 
Physics Honors
A bullet is fired from a rifle, emerging at 340 m/s. It strikes a sandbag some distance away, having lost 10% of its velocity due to air resistance. if it penetrates the sandbag to a depth of 12 meters, how long did it take for the bullet to come to rest
asked by Allison 
physics
A long jumper leaves the ground at an angle of 20.8 ◦ to the horizontal and at a speed of 10.3 m/s. How far does he jump? The acceleration due to gravity is 9.8 m/s 2 . Answer in units of m and What maximum height does he reach? Answer in units of
asked by norma 
Chemistry
Delta H reaction for the following reaction: C(s)+H2O(g)=>CO(g)+H2(g)
asked by Chris 
Chemistry
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50g sample is burned, and 1.80 g of CO2(g) is produced. What is the mass percentage of the table salt in the mixture?
asked by Harley 
calculus
im having so much trouble figuring out how to get these answers. i already know the answers i just need to figure out how to get them... directions: find the points of inflection and discuss the concavity of the graph of the function... 1.
asked by rachel 
chemistry
A 1.5L container of liquid nitrogen is kept in a closet measuring 1.3 m by 1.3 m by 1.8 m. Assuming that the container is completely full, that the temperature is 22.3 C, and that the atmospheric pressure is 1.2 atm , calculate the percent (by volume) of
asked by samantha(very important) 
Physics Honors
A rock is thrown horizontally from a cliff overlooking the ocean. If the cliff is 45 meters high and the rock is thrown at 18 m/s, what is the angle at which it strikes the ocean?
asked by Allison 
Chemistry 105
A sample of nitrogen gas in a 1.86L container exerts a pressure of 1.32 atm at 20 C. What is the pressure if the volume of the container is maintained constant and the temperature is raised to 354 C?
asked by JULIE 
CHEM AP please help!!
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s i tried every way and still cant get it..please someone help
asked by Karina 
Early childhood literacy
"I eated it all up!"said Jimmy. Mrs. Newman, his teacher, should say. A. "Jimmy,say that again, but instead of saying "I eated it all up!"I ate it all up!' B. "What did you eat up?"
asked by Daisy 
physics
a man has ten 1/10 ohm resistors with him . what is the maximum current that he can get with them?
asked by sangeeth 
TRIG
1) Find an angle that makes the statement true: costheta =sin(3theta+10degrees) 2) Verify this proof: sec(Pie x)= secx Can someone show me how to solve for these. Very much appreciated!
asked by ALISON 
Math
The length and width of a rectangle are (x+4) cm and x cm respectively. Write down expressions for: A. The perimeter of the rectangle B. The length of the side of a square with the same perimeter If the sum of the areas of the square and the rectangle is
asked by Simon 
Physics
Suppose that the magnetic field o fthe Earth were due to a single current moving in a circle of radius 2988 km through the earth’s molten core. The strength of the Earth’s magnetic field on the surface near a magnetic pole is about 6.00E5 T. About how
asked by Jessica 
CHEMISTRY AP
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s I used the principle and got 2.48e29 its wrong..and since
asked by Karina 
Algebra 2
Find the coordinates of the vertices of the parallelogram with sides that are contained in the lines with equations y=3, y=7, y=2x, y=2x13
asked by Madison 
Physics
A 3.4 kg block is pushed along a horizontal floor by a force of magnitude 21 N at a downward angle θ = 40°. The coefficient of kinetic friction between the block and the floor is 0.26. What the magnitude of the block's acceleration?
asked by Tom 
Chemistry 105
What is the pressure in a 10.0L cylinder filled with 0.470 mol of nitrogen gas at a temperature of 329 K?
asked by JULIE 
Business English
Buying time with limited agreement is a useful strategy when you: A. Have too much work to do. B. Cannot think of anything to say. C. Want to avoid escalating a conflict but do not agree with other person D. Know that the presenting problem is not the real
asked by Diana 
History
Was the structure Hanging Gardens of Babylon effective for its' stated purpose? Explain
asked by Jordana 
Physics
1)A wire is carrying a current, i, in the positive ydirection. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
asked by Jessica 
world history
which of the following environments is conducive to a herding way of life? a. Swamps. b. Steppes. c. Alluvial plains. d. Uplands.
asked by morin 
algebra
A street vendor sells about 20 shirts each day when she charges $8 per shirt. If she decreases the price by $2, she sells about 10 more shirtseach day. How can she maximize daily revenue?
asked by Paige 
Math
A factory has two machines that produce bolts. Machine I produces 80% of the daily output of bolts, and 9% of its bolts are defective. Machine II produces 20% of the daily output, and 5% of its bolts are defective.
asked by Anonymous 
Com/170
Write a 150 to 200word paragraph to explain the importance of purpose, audience, tone, and content in academic writing. Use the three components of a good paragraph covered in this week's readings. Underline your topic sentence. Boldface your concluding
asked by KIm 
business communication
You are writing to a reader who favors a different solution than the one you recommended. Which of the following is MOST likely to persuade the reader? A. Describe your reader's solution first, explain why it won't work, and then go on to describe your own
asked by Sheliah 
math
A set of 100 open lockers are numbered from 1  100. Sarah comes by and closes all the lockers with even numbers. Then Sarah walks past the lockers again and checks the ones numbered with multiples of 3. If the locker is closed, she opens it; if it is
asked by jack 
Math 101
1. Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $123.00 for 3 days and 300 miles, while Mary was charged $216.00 for 5 days and 600 miles. What does Best Rental charge per day, for mileage? 2. There were
asked by Ann 
algebra
a loan of 22,823 was repaid at the end of 12 months. What size repayment check (principal and interest) was written , if a 10.7 % annual rate of interest?
asked by beth 
Math
a rectangular field with an area of 8000 m^2 is enclosed by 400 m of fencing , detemine the dimesions of the field to the nearest tenth of a metre
asked by Kestrel 
Math 101
1. Best Rentals charges a daily fee plus a mileage fee for renting its cars. Barney was charged $123.00 for 3 days and 300 miles, while Mary was charged $216.00 for 5 days and 600 miles. What does Best Rental charge per day, for mileage? 2. There were
asked by Ann 
NEED HELP PLZ!!! STATS
Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this
asked by Jennifer 
business communication
which of the following is NOT a question you need to answer to choose a persuasive strategy? A. What do you want readers to do. B. What points will the audience agree with? C. How strong a case can you make? D. What kind of persuasion does your
asked by Sheliah 
7th grade social studies
what was Fray Marcos de Niza famous for? Please help! Thank you!!
asked by saranghae12 
Chemistry
If 20.0 grams of propane are burned with 50.0 grams of oxygen: What mass of CO₂ is produced? What mass of water is produced? What mass of which reactant was excess? Thank you so much.
asked by Mom 
english
what can be a thesis statment for alice munro's short story " miles city montana"?
asked by mehak 
History
By 1826 was the country more Hamiltonian or more Jeffersonian?
asked by Sam 
geometry
line MN is perpendicular to op If the coordinates of M,N and O are (2,4), (5,8) , (6,2) respectively, find the equation for line OP
asked by sara 
Chemistry
An unknown hydrate of copper (II) oxalate is to be identified in the lab. The following data was collected by a student: Mass of crucible 23.776 g Mass of crucible + hydrate 24.889 g Mass of crucible + anhydrate 24.530 g Thank you
asked by Mom 
physics
Two blocks, of weights 2.8 N and 5.5 N, are connected by a massless string and slide down a 47° inclined plane. The coefficient of kinetic friction between the lighter block and the plane is 0.087; that between the heavier block and the plane is 0.39.
asked by Ted 
Chemistry
If 0.120 moles of water are produced in the reaction H+(aq)+OH(aq)=H2O deltaH=56.2kj/mol
asked by Chris 
Hum Media
•What responsibilities do media outlets have when reporting news? Consider issues such as privacy, technologies, quality in reporting, and biases.
asked by Wonk 
chemistry
the activity series of metals is: Au < Ag < Cu < Sn < Cd < Zn < Al < Mg < Na < Cs which reaction below occutrs spontaneously upong mixing the reageant shown? a) Sn(s) + Al3+ (aq)> sn2+(aq) + al(s) b) sn(s) + zn 2+ (aq) > sn 2+ (aq) +zn (s) c) zn (s) + au
asked by Dani 
Math
a rectangular laboratory tray is 1/3 feet by 5/4 feet. Find the area
asked by Ashley 
Pre Calculus
Inverse functions what is the inverse function of f(x)=1/square root of x +1? and f(x)=1x^2, x
asked by Josh 
Chemistry 105
A syringe containing 1.75 mL of oxygen gas is cooled from 96.4 C to 0.4 C. What is the final volume of oxygen gas? in mL
asked by JULIE 
Chemistry
Suggest chemical tests to identify 3 solid samples of sodium chloride, sodium carbonate and calcium chloride respectively.
asked by A 
Chemistry
If HOCl has a Ka=3.2*10^12, what is the pH of 0.1M KOCl?
asked by Dave 
reposting maths qn as mistake in quantity
Amy bought 16 forks and 12 spoons for $106.40. Ben bought 10 forks and 6 spoons for $60.20. Cathy wants to buy 5 forks and 5 spoons. How much would Cathy have to pay? (i need to solve by a nonalgebraic solution)
asked by joi 
Chemistry(Please help!!)
For a chemistry lab the experiment was to carry out an acidbase titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass
asked by Hannah 
algebra
Use the compound interest formula A=P(1+r)^t and the given information to solve for r. A=9,000,000 P=80,000 t=40 I have done this problem over a over and still get the wrong answer.
asked by beth 
The Nature of Chemical Reactions
1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of
asked by Anonymous 
math
hooke's law determine that if a small weight is suspended from a spring,the length of the stretched spring y, is a linear function of the weight, x. determine the linear equation if the unstretched spring is 12 inch and weight of 2 lbs stretches it to 16
asked by rahul patel 
Stats
Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this
asked by Jennifer 
Chemistry
If 0.120 moles of water are produced in the reaction H+(aq)+OH(aq)=H2O deltaH=56.2kj/mol
asked by Chris 
Algebra 2
A bridge is designed with cables that connect two towers that rises above a roadway. Each cable is modeled by the function, H(x)=1/9000x27/15x+500, where x and h(x) are measured in feet. a. what is the height above the road of a cable at it's lowest
asked by Luke 
Stats
USA snapshot presented a bar graph depicting business travelers’ impression of wait times in airport security lines over the past 12 months. Statistics were derived from Travel Industry Association of American Business Traveler Survey of 2034
asked by Jennifer 
Math
Use the compound interest formula A=P(1+r)^t and the given information to solve for r. A=9,000,000 P=60,000 t=40
asked by barb 
math
Good day to you. How can I approach this math problem. "To save for a child's education, the Petersens deposited $2500 into an account that pays 6% annual interest compounded daily. Find the amount of interest earned on this account over a 20year period".
asked by Cliff 
Algebra
Use the square root property to solve for the indicated variable. Assume that the variable represents positive numbers. Express all radicals in simplied form. 2e^2 = 3h, for e
asked by Mindy 
Mathematics
There is a twodigit number such that the sum of its digit is 6 while the product of the digits is 1/3 of the original number. Find this number. Explain your solution
asked by Jay 
Chemistry
If 20.0 grams of propane are burned with 50.0 grams of oxygen: What mass of CO₂ is produced? What mass of water is produced? What mass of which reactant was excess? Thank you so much.
asked by Mom 
College Algebra
y varies directly as the third power x and inversely as Z. If y=16 when x=4 and z=8,find y when x=9 and z=6
asked by Ally 
Physics
Please help me with these choose the best answers since I'm not sure of my answers. A current element produces a magnetic field in the region surrounding it. at any point in space, the magnetic field produced by this current element points in a direction
asked by Jessica 
geography
What is the name of the largest lake in Central America? My answer is Lake Nicaragua. Is that right? What do the following countries have in common: Angola, French Guiana, United States, Portugal? My answer is: They are all bordered by the Atlantic Ocean.
asked by Reed 
Chemistry urgent
How is pushing down the accelerator pedal resulting in a faster consumption of fuel in the engine concentration?
asked by Natasha 
Physics
In order to open a clam, a gull will drop it repeatedly on a hard surface until the shell cracks. If the clam takes 2.2 seconds to hit the ground, how high was the gull?
asked by Teal 
Chemistry 10
The accelerator pedal in the car is pressed, resulting in a faster consumption of fuel in the engine. Now according to previous answers to this question the answers concentration but I do not understand how. I though concentration is the amount of a
asked by Natasha 
Pre cal
find all zeros of x^45x^3+10^220x+24 (leave all irrational answers in radical form) i simply don't understand this question, i can find the rational value but never can i calculate how to find the irrational values nor the imaginary number values. what
asked by Basim 
geomatry deductive reasoning
a sequence begins 4,1,6,11 find the rule that generates the sequence. Then give the 5oth term is the sequence. What type of reasoning inductive or deductive, do you use when solving this problem?
asked by manal 
History
By 1826 was the country more Hamiltonian or more Jeffersonian?
asked by Alex 
Physics
1)A wire is carrying a current, i, in the positive ydirection. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
asked by Jessica 
statistics
Listed below are the FICO scores of a simple random sample of United States adults. Do these scores appear to come from a population that has a normal distribution? Explain how you arrived at your answer and defend your conclusion. 708 713 781 809 797 793
asked by brandon 
science (6th grade)
an athlete drinks a liter of water before a basketball game and continues to drink water during the game,describe how the athletes body is able to maintain homeostasis during the course of the game?
asked by scooby 
Mathematics
There is a twodigit number such that the sum of its digit is 6 while the product of the digits is 1/3 of the original number. Find this number. Explain your solution
asked by Tata 
maths help needed now pls
Amy bought 16 forks and 10 spoons for $106.40. Ben bought 10 forks and 6 spoons for $60.20. Cathy wants to buy 5 forks and 5 spoons. How much would Cathy have to pay? (i need to solve by a nonalgebraic solution)
asked by joi 
chem
Explain clearly why changes in base concentration do not affect the observed reaction rate of an E1 elimination.
asked by tim 
Chemistry
1.)Two different Isotopes are found to have 2 different cpm with Isotope A having a CPM that is 1.5x that of Isotope B? Which one is more radioactive? 2.) And how can CPM for an isotope be increased? I think that for the same CPM you can have different
asked by Connie 
Chemistry
If 0.120 moles of water are produced in the reaction H+(aq)+OH(aq)=H2O deltaH=56.2kj/mol what is qrxn
asked by Nick 
Chemistry
You isolate an acidic compound in an experiment by first separating it from the organic layer. Then you have a solution containing a salt of an acid. You acidify it using concentrated HCl. A precipitation begins to form while the solution is still basic..
asked by Rachel 
Chemistry
To prepare an effective buffer in a PH range less than 7 ,it is advisable to select a weak acidconjugate base pair in which the pK(a) of the weak acid equals the desired PH (+)1 Over what PH range is the acetic acidacetate ion buffer most effective
asked by Queenking 
geometry
line rs intersects line lm at p, angle rpl=x+y, lps=3x+2y, mps=3x2y. solve for x and y find angle RPL, LPS, and MPS
asked by sara 
Hum Media
What responsibilities do media outlets have when reporting news
asked by Wonk 
physics
A boat moves through the water with two forces acting on it. One is a 2.80×10 3 N forward push by the motor, and the other is a 1.56×10 3 N resistive force due to the water. a)What is the acceleration of the 1312.6 kg boat? Answer in units of m/s^2 b)If
asked by physics 
Math
Determine whether the following statement makes sense or does not make sense, and explain your reasoning: When I'm trying to determine end behavior, it's the coefficient of the leading term of a polynomial function that I should inspect. A) This makes
asked by Abby 
statistics
In a poll of voters in a certain city, 32% said that they backed a bill which would limit growth and development in their city. The margin of error was reported as 1.7% with 90% confidence. Determine the bounds for the confidence interval. A. (88.3%,
asked by debbie 
HAP
Triglycerides containing one or more double bonds between carbon atoms in their fatty acid chain: (choose all that apply) are liquid at room temperature are unsaturated usually come from Plants are solid at room temperature usually come from animals are
asked by ryan 
math
write and solve a 2 step equation a baseball ticket cost $20 for each student that attends. there is also a parking fee of$30 for the bus the total cost of the trip was $330
asked by tra 
algebra
a loan of 22,823 was repaid at the end of 12 months. What size repayment check (principal and interest) was written , if a 10.7 % annual rate of interest?
asked by beechst 
accounting
Journalize the writeoffs and the yearend adjusting entry for 2012 under the allowance method, assuming that the allowance account had a beginning balance of $55,000 on January 1, 2012, and the company uses the analysis of receivables method. If an amount
asked by Anonymous 
Physics Honors
A basketball is thrown horizontally from a window that is 22 meters high. If the initial velocity of the ball 18 m/s, find how long the ball takes to reach the ground and how far the ball lands from the building?
asked by Allison 
Physics
Hi,I need help with question 1) There were twins on our planet earth. They were physicst. One of them were sent to space at his 20 year. When he comes back after 20 years of stay in the space he was 40 years but his brother who stayed on earth was 60 years
asked by Lorry 
History Please Please
Could you please explain to me: how was the structure (Collosus of Rhodes) effective for it's stated purpose? I don't understand the question and I need something for my project. Pleaseee.
asked by Jack 
health care
Explain some ways to integrate the future trends of health care research and consumerism. as in future trends for the future developement
asked by bobbi 
chemistry
At what point in the concentration of the weak acid or conjugate base does the buffer solution stop resisting a PH change when strong acid is added ? Thank for helping
asked by Namis 
Physics
The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.34 with the floor. If the train is initially moving at a speed of 58 km/h, in how short a distance can the train be stopped at constant acceleration
asked by Ty 
Biology
Select two signal mechanisms that activate transcription in response to an external signal. Any of these systems ultimately activates a transcription factor. For each of the systems you have selected, trace the route from signal binding to receptor to the
asked by M.C.Filth 
chemistry
what is the universal gas constant( the R, in the equation PV=nRT) of this question? What is the pressure in a 10.0L cylinder filled with 0.470 mol of nitrogen gas at a temperature of 329 K?
asked by samantha(very important) 
geomatry deductive reasoning
a sequence begins 4,1,6,11 find the rule that generates the sequence. Then give the 5oth term is the sequence. What type of reasoning inductive or deductive, do you use when solving this problem?
asked by manal 
Physics
1)A wire is carrying a current, i, in the positive ydirection. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
asked by Jessica 
geometry
given: regular hexagons find x and y. please explain answer
asked by camille 
math
hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for recycling .one class collected 42 cans,another collected 56 cans,and the third class collected 64 cans .what is a reasonable range
asked by jane 
Chemistry urgent
How is pushing down the accelerator pedal resulting in a faster consumption of fuel in the engine concentration?
asked by Natasha 
Economics
can you help me brain storm? I want some points on why Per Capita GDP might be a bad way to compare wellbeing across countries.
asked by allie 
Math
The trail is 2989 miles long. It begins in City A and ends in City B. Manfred has hiked 2/7 of the trail before. How many miles has he hiked?
asked by Ashley 
statistics
Listed below are the FICO scores of a simple random sample of United States adults. Do these scores appear to come from a population that has a normal distribution? Explain how you arrived at your answer and defend your conclusion. 708 713 781 809 797 793
asked by brandon 
Biology
What is the difference between multiple gene inheritance and multiple allele inheritance
asked by Kestrel 
health care
Explain some ways to integrate the future trends of health care research and consumerism.
asked by bobbi 
Chemistry
If 20.0 grams of propane are burned with 50.0 grams of oxygen: What mass of CO₂ is produced? What mass of water is produced? What mass of which reactant was excess? Thank you so much.
asked by Mom 
Grammar
Select the correctly punctuated sentence. 1. A) Infection for example can be a complication of surgery B) Infection, for example, can be a complication of surgery. C) Infection, for example can be a complication of surgery. My answer is B 2. A) No, I do
asked by Cindy 
found of tech
Lab 1.1 Can somebody please, please help me with this lab?! I know it requires sketching and modeling which only i can do , but please, any help will be appreciated. I find these labs so hard to do, but my teacher said there's no alternative assignment and
asked by JAY 
Calculus
Calculate the integral of: ((x^2)tan(x))/(1+((cos(x))^4))
asked by Anonymous 
English
Compare the love Romeo and Paris have for Juliet
asked by Vanessa 
MATH
The base and height of a triangle are in the ratio 5:3.if the area of the triangle is 67.5 square metre.find its base and height.
asked by RIYA 
Cultural Diversity
An Asin Parent may not emulate the early childhod teacher's practice of praising her son for his assomplishments because: A. Praising the child might bring him bad luck B. The parent believes that absence of criticism is itself an appropriate form of
asked by Daisy 
PLZ HELP....STATS
You are given the following data. # of Absences Final Grade 0 96 1 92 2 71 3 66 4 60 5 51 A. Find the correlation coefficient for the data. B. Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5
asked by Jennifer 
science
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard
asked by Samuel 
physics
Two particle p and q starting from rest moves along a straight part covers the same distance in time tpandtq respectively.if the acceleration on of p is 4times that of q,determine the ratio of tpandtq
asked by Segun 
mgt
Im supposed to describe the organization structure of buger king?? Im not sure what it is
asked by a 
math
hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for recycling .one class collected 42 cans,another collected 56 cans,and the third class collected 64 cans .what is a reasonable range
asked by jane 
geometry
The perimeter of a rectangle of two numbers. The sum of the numbers is 163, and their difference is 33. Write two equations that would be used to solve the system
asked by queen 
Chemistry
For a chemistry lab the experiment was to carry out an acidbase titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass
asked by Hannah 
ENG COMP
List the sources you have found that you believe will be most helpful to you in preparing your final research paper. Identify the types of sources you believe will be most useful and where you intend to search for these sources.
asked by KESHIA 
Science
A large beaker contains 500ml of liquid mercury? The mass of mercury is 6773 g. What is the density? Do I divide 6773/500?
asked by Vonte' 
Math
Use the compound interest formula A=P(1+r)^t and the given information to solve for r. A=9,000,000 P=80,000 t=40 I have done this problem over a over and still get the wrong answer.
asked by crazy8 
Social Studies
I have a midterm tomorrow and this is the essay question: “When men’s minds seem narrow to you, tell yourself that the land of God is broad; broad His hands and broad His heart. Never hesitate to go far away, beyond all seas, all frontiers, all
asked by Katie 
Physics
1)A wire is carrying a current, i, in the positive ydirection. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
asked by Jessica 
Chemistry 105
A sample of gas has an initial volume of 33.0 L at a pressure of 1.1 atm. If the sample is compressed to a volume of 10.0 L, what will its pressure be? (Assume constant temperature.)
asked by JULIE 
TRIG
Verify the following identity. 1) sin(x+y) __________ = tanx+tany cosxcosy 2) Write cos3x in terms of cosx I cannot figure out how to solve for identities they are so hard. Any help appreciated!:)
asked by ALISON 
Physics
Please help me with these choose the best answers since I'm not sure of my answers. A current element produces a magnetic field in the region surrounding it. at any point in space, the magnetic field produced by this current element points in a direction
asked by Jessica 
chem
energy of a proton divided by its frequency equals?
asked by rob 
Algebra
Use the sqaure root property to solve the equation. 7x^24=0
asked by Jaya 
Math
Determine the quadratic equation whose solutions are: 3 and 2 Solution(with workings):
asked by Ghiffari 
Physics
1)A wire is carrying a current, i, in the positive ydirection. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
asked by Jessica 
maths
How is root245 7root5, how do you work it out? isnt 5*43 245 and you cant simplify that further?
asked by nabiha 
science
Lab 1.1 Can somebody please, please help me with this lab?! I know it requires sketching and modeling which only i can do , but please, any help will be appreciated. I find these labs so hard to do, but my teacher said there's no alternative assignment and
asked by JAY 
physics
A 3.00 kg rock is dropped from a bridge and strikes the water below with a velocity of 40.0 m/s. What is the momentum at impact?
asked by Anonymous 
Cultural Diversity
An early learning center that emphasizes"product" over "process" would A. threaten most mainstream children. B. be childdirected, reflecting selfselection of activities and materials. C. ignore the principles of developmentally appropriate practices. D.
asked by Daisy 
Cultural Diversity
A cultural mismatch may result from labeling a child as hyperactive or behavior disordered if: A. a young black child does not receive frequent nourishment opportunities B. there is too little or too much structure imposed in the group. C. the program
asked by Daisy 
PreVet
I'm doing a report on shark and ray behavior for my prevet class and I have been trying to get some good information on tonic immobility. There is not much about it on the internet so any information would be helpful.
asked by Harley 
latin
pastor centum blank habet a ovis b ovium c ovos d oves
asked by samantha 
psychology
Write a 700 to 1,050word personal narrative that addresses the following questions: · How have you seen the purpose and meaning of your life evolve over the past 5 years? What events have led to this evolution? Describe how one of the theories from your
asked by valaie 
Algebra
Rewrite 81/(88) as multipulcation
asked by D 
Applied Statistics
Assignment Guidelines Perform a twotailed hypothesis test using the steps outlined in the assignment description. In a Word document, create a report that includest the following: Null and alternate statements. Pasted Microsoft Excel data output.
asked by Truth 
Ecology
Signs of fish stress include A. increased respiration B. faster scale growth C. reduced feeding rates D. both A and C Thanks for the help!
asked by Lydia 
integrated algebra
Graph 2y = 1 + 2
asked by lily 
geometry
what is the perimeter of triangleABC if the coordinattes of A,B and C are (3,7), (7,3) and (2,5) respectively
asked by sara 
Stats
You are given the following data. # of Absences Final Grade 0 96 1 92 2 71 3 66 4 60 5 51 A. Find the correlation coefficient for the data. B. Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5
asked by Jennifer 
algebra
trains A and B are traveling in the same direction on paraleel tracks. Train A is traveling at 80 miles per hour and train B is traveling at 88 miles per hour. Train a passes a station at 5:10 P.M. If train B passes the same station at 5:40 P.M., at what
asked by Natasha 
English
I urgently need you to check these sentences on Macbeth. Thank you. (The use of tenses in the paraphrase). 1) In Shakespeare’s day the second course was (is) the main part of the meal. Waking life is imagined as the first course, which gives some food to
asked by Henry2 
Home Insurance
As a general rule,homeowners should carry property damage insurance on thier structure amounting to at least ___percent of their value (the cost of rebuilding them.) A.50 B.60 C.70 D.80 i got A
asked by Ciara 
math HELP!!
how many trucks does it take to carry 52,oo bushels of rice?
asked by roly 
SCI/275
Can anyone read this and add some to it. It is suppose to be 1750 words but I ran out of things to say. Any help would be appreciated. The environmental problem I am going to be discussing is recycling. The reason I chose this topic is because I think it
asked by Heather 
English
I can't understand how I can check sentence 1. Can you please examine the other sentences, too. Thank you very much for your invaluable help! 1) His hand is more likely to turn red the great gathering of seas, making the green of the water red, than being
asked by Henry2 
Business English
Which of the following is a characteristic of communication in high context cultures? A. Written agreements are binding? B. There is reliance on nonverbal signs to communicate. C. Oral agreements are not binding. D. There is preference for direct
asked by Diana 
Just a question
How might writing summaries of key concepts and important information be useful in promoting effective learning and remembering?
asked by Bee 
AP environmental Science
Can someone please explain what this means to me in english? i've read it a million times and i have no idea what it means. Thanks for any help!!! "Scientific evidence shows a direct relationship between sea level and the global mean atomospheric
asked by Renee 
Math
Which of the following is NOT proportional? A)4/10 = 6/15 B) 2/1 = 30/15 C) 5/25 = 4/24 D) 63/90= 70/100
asked by Matthew 
calc
Find all values of x for which the tangent line ot y=2x^3x^2 is perpendicular to the line x +4y=10?
asked by raj 
physics
true of false if you only want a small volume of hot water, you should place the immersion heater near the bottom?
asked by rose 
geomatry

english
how do i rewrite this sentence? Anyone who comes in late to Mr. Barker's class have to have a good excuse.
asked by cristy 
eth
should united states government policy favor certain kinds of immigrants?
asked by jen 
algebra
N(x)= 0.4x^2 + 11.2x +10 solve for x
asked by chris 
Math
If sin(z) = 0.3944 and pi/2 < z < 3pi/2, what is the value of z to the nearest tenthousandth?
asked by JAred 
geography
A country in southeast Asia between Burma and Laos used to be called Siam. What is it called today? My answer is Thailand. Is this right? How many countries does the Antarctic Circle pass through? My answer is zero. It does not pass through any countries.
asked by Reed 
slogans
i need some nutrition slogans
asked by ZUICK 
BIOLOGY
WHAT ARE TWO LEVELS OF BIODIVERSITY THAT WE FIND IN AN ECOSYSTEM?
asked by VICTORIA 
psychology
what are some strategies could be used to strengthen a relationship
asked by ann 
math
Is 1 greater than or less than negative 1?
asked by Dani 
English
I left out the following sentences on the same theme. Thank you. 1) If Duncan is bleeding, she will smear the grooms’ faces with blood and she goes to perform to task. 2) She will paint their faces with the golden blood. 3) Macbeth wonders whether all
asked by Henry2 
French
could someone please edit my biography on Gaspard Ulliel? Gaspard Ulliel est né à 25 Novembre, 1984 à BoulogneBilliancourt, Paris, France. Il était le seul enfant et ses parents étaient riche et réussie dans le monde de mode. Son rêve avait
asked by Rebecca 
microbiology
Rifampin inhibits the â subunit of the E. coli RNA polymerase. A typical rifR mutant contains a mutant gene that produces a â subunit that no longer binds rifampin. Propose one other genetic alteration by which an E. coli might become resistant to the
asked by AKASHA 
English
I urgently need you to help me rephrase the following lines (you once told me they were wrong.number 2). Macbeth: "Methought I heard a voice cry, “Sleep no more! Macbeth does murder sleep”—the innocent sleep,Sleep that knits up the raveled sleave of
asked by Henry2 
biology
Would you expect the fraction of bacteria that are spontaneous rifampin resistant mutants to be higher or lower in a culture that: you had propagated many times or one you had just started from a single colony of sensitive bacteria? Why?
asked by AKASHA 
English
Why was poetry anthology named after O'Hara's poem "Sleeping On The Wing"
asked by Beth 
psychology
How does the group around us effect your behavior? And What are 5 ways people around us change our behavior whether we are paying attention or not?
asked by Annabell 
college math
A community 5K run will award $50 to the winner. 60 people enter the race, and they each pay an entry fee of $20. Assuming they are all equally likely to win, what is a fair price for the competition? Round to the nearest cent Can anyone help me get
asked by bridgett 
Chemistry
What is the molar concentration of the standard KMn04 soultion?
asked by Gloria 
Physics Honors
The same rock is thrown upwards at an angle of 45 degrees. It travels 10 meters up to its maximum height. How far will it travel before it lands?
asked by Allison 
Spanish
The problem is: Que talla usar/usara/usaro Pedro? Does usar get affected by the subject or any ol noun?
asked by Erin 
world history
3 contributions of fancois rabelais
asked by sara 
algebra
2m  18n + 17
asked by Alex 
mgt/230
what is the relationship between organizational structure and organizational function? help please?
asked by ann 
MATH(percentage)
64 is 80% of what number? is it this 10 20 100 x x=200
asked by ZUICK 
psychology
what strategies could be used to stregthen a relationshi[
asked by ann 
biology
Someone has just given you the cDNA for GFP and you would like to design a construct that would result in GFP becoming resident within the ER. What would you do to this cDNA that would result in this final location. Explain.
asked by M.C.Filth 
Algebra
what is the square root of 5 divided by 2 times the square root of 125?
asked by Al 
BIOLOGY
HOW COULD USING AQUACULTURES IMPACT THE BIODIVERSITY OF WILD FISH POPULATIONS?
asked by VICTORIA 
Math
Find the xintercept of y=x^24x+3
asked by Dawn 
microbiology
What would you expect to be more frequent in a culture you have propagated, met  mutants or rifampin resistant mutants? Why? Note: The culture was grown in media with methionine and without rifampin.
asked by AKASHA 
physics
what is an e.m.f
asked by newton 
Psychology
How is our behavior affected by others?
asked by Suzy 
science
What araes in the world are most likely to be effected by rising sea levels? What groups of people sometimes live in these areas?
asked by Help me please 
science
What araes in the world are most likely to be effected by rising sea levels? What groups of people sometimes live in these areas?
asked by Help me please 
science
Lab 1.1 Can somebody please, please help me with this lab?! I know it requires sketching and modeling which only i can do , but please, any help will be appreciated. I find these labs so hard to do, but my teacher said there's no alternative assignment and
asked by JAY 
calculus
Limit(5*x^3+7*x^29*x+14,x=7);
asked by Anonymous 
management
with example, ilustrate the function of management
asked by sofia 
math
4=2/9(4y2)
asked by kayla 
MATH
10 2/9  3 17/18
asked by Ashley