Wednesday

May 25, 2016
Number of results: 34,481

**physical science **

An electric current heats a 225 g copper wire from 20.0 °C to 40.0 °C. How much heat was generated by the electric current? (ccopper = 0.093 cal/gm-deg)
*March 16, 2010 by Anonymous*

**physical science**

An electric current heats a 225 g copper wire from 20.0 °C to 40.0 °C. How much heat was generated by the electric current? (ccopper = 0.093 cal/gm-deg)
*July 16, 2010 by jerry*

**physics, please help check**

A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the ...
*February 21, 2007 by Katrina*

**Physics Check**

A ball is rolling across the top of a billiard table and slowly rolls to a stop. How would Galileo explain the motion of the ball as it stopped? a)The ball's natural state is at rest =b)The ball stopped because it ceased to be pushed c)The ball stopped due to external forces ...
*July 12, 2010 by Ariel*

**Physics**

Determine the normal force for a laundry basket with a mass of 4.7 kg in each of the following situations (a) at rest on a horizontal surface _________ N (b) at rest on a ramp inclined at 12° above the horizontal _______ N (c) at rest on a ramp inclined at 25° above the ...
*October 23, 2012 by Dakota*

**Physics**

A wheel has a coonstant rotational acceleration of 3.0 rad/s^2. During a certain 4.0 s interval, it turns through an angle of 120 rad. Assuming that the wheel starts from rest, how long is it in motion at the start of the 4s interval. I just need help in getting started. I ...
*December 4, 2006 by laura*

**physics**

two boys trying to move a 200 kg cement block pull on two ropes attached to the block the tension in the ropes are 400N and 300N while the angle between them is 50°. sketch a vector triangle showing and naming the two forces exerted by the boys as well as their resultant.
*February 19, 2014 by nomfundo*

**college Physics**

Two identical 0.18 kg blocks (labeled 1 and 2) are initially at rest on a nearly frictionless surface, connected by an unstretched spring, as shown in the upper diagram, where x2 = 0.06 m. Then a constant force of 9 N to the right is applied to block 2, and at a later time the...
*October 26, 2010 by Anonymous*

**Science**

Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35 kg start at rest and slide for 5.0 s down a hill. The force of gravity pulling the children and sled down the hill is 470 N but the snow provides a frictional force of 325 N. At the bottom of the hill, the ...
*March 13, 2013 by Jacob*

**Science**

Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35 kg start at rest and slide for 5.0 s down a hill. The force of gravity pulling the children and sled down the hill is 470 N but the snow provides a frictional force of 325 N. At the bottom of the hill, the ...
*March 13, 2013 by Jacob*

**physic**

A box with a mass of m = 7.50 kg is set on top of a spring with a spring constant of k = 500 N/m. The box is pushed down 30.0 cm and released. (a) What is the maximum height the box reaches after being launched by the spring? (b) What is the instantaneous power delivered to ...
*October 13, 2014 by Elvis*

**physic**

A box with a mass of m = 7.50 kg is set on top of a spring with a spring constant of k = 500 N/m. The box is pushed down 30.0 cm and released. (a) What is the maximum height the box reaches after being launched by the spring? (b) What is the instantaneous power delivered to ...
*October 14, 2014 by Elvis*

**physics**

Draw the figure, and calcuate the height above the bottom point the swing starts. (I remember it as 2.3(1-cos25)). the initial energy is mg*height. The final energy is 1/2 m v^2 The difference is frction. A 49 kg child on a 2.3 m long swing is released from rest when the swing...
*February 28, 2007 by bobpursley*

**physics**

1. a car starts from rest attains a velocity of 36kmph with an acceleration of 0.1 m/s^2 find the total time of travel of the car. 2. the distance travelled by a body in fourth second is twice the distance travelled in second of the acceleration of the body is 3m/s^2 the find ...
*May 20, 2012 by barbie*

**U.S. GOVERNMENT**

1)Independents are people who have strong party affiliation. A) True B) False 2)About 75% of those eligible to vote did so in the 2000 presidential election. A) True B) False 3)If we are indeed a democracy, a government by the people for the people, then it is important for ...
*June 26, 2012 by Booker Perry*

**phy 231**

Tall buildings are flexible and undergo simple harmonic motion (SMH) when excited by wind. Suppose the top floor of a skyscraper is in SMH, swaying back and forth with a frequency of 0.181 Hz and an amplitude of 1.5 m. a.What is the maximum speed experienced by top floor ...
*March 8, 2016 by Andrea*

**physics**

A pistol of mass 2kg fires a bullet of mass 50g. The bullet strikes a block of mass 0.5kg. If the block with bullet embedded in it moves with a velocity of 4m/s the recoil velocity of the gun will be..??
*August 28, 2015 by yash*

**physics**

Laura is at the top f a snow-covered hill ready to slide down on her first skiing attempt. if the slope is angled at 30 degrees with respect to the horizontal, how much time passes before she reaches v=100km/h? what distance along the slope would she have covered in that time?
*October 1, 2009 by shimmerystars*

**physics**

Laura is at the top f a snow-covered hill ready to slide down on her first skiing attempt. if the slope is angled at 30 degrees with respect to the horizontal, how much time passes before she reaches v=100km/h? what distance along the slope would she have covered in that time?
*October 1, 2009 by shimmerystars*

**English**

Which sentence uses lie or lay correctly? (1 point) Please lay your pencil on top of your notebook.<---- On Sunday afternoons I often lay down for a nap. Just lie those newspapers on the kitchen counter. Last night I lay in bed for hours before I fell asleep.
*June 5, 2014 by Anonymous*

**Physics**

A box is sitting at rest at the top of a ramp 3.00m long at an angle to the horizontal of 12 degrees. When the box reaches the bottom of the frictionless ramp, it falls an additional 2.00 m vertically before hitting the floor. How far from the right end of the ramp does the ...
*November 12, 2014 by Jane*

**physics**

A girl on top of a building drops a baseball from rest.at the same moment a boy below throws a golfball upwards towards her with a speed of 20m/s.the golfball is thrown from a point 18m below where the baseball is released.how far will the baseball have dropped when it passes ...
*March 17, 2015 by olawale*

**math**

a plat form and a building are on the same horizontal plane , the angle of depression of the bottom of the building from the top A of the platform is 39 degree. the angle of elevation of the top D of the building from the top of the platform is 56 degree. given that the ...
*May 12, 2016 by chris*

**physics**

In preparation for shooting a ball in a pinball machine,a spring (K=675N/m) is compressed by 0.0690m relative to its unstrained length. The ball(m=0.600kg) is at rest against the spring at point A.When the spring is released, the ball slides (without rolling) to point B, which...
*April 1, 2007 by Cavin*

**Multivariable Calculus - Green's Theorem**

Compute the line integral of F = <X^3, 4X> along the path from A to B. The path from A to B is not closed, it starts at A which has coordinates (-1,0) goes to (1,0) then goes up to (1,1) then left to (-2,1) then down to (-2,-1) and finally stops at B at (-1,-1). Hint: To...
*November 16, 2010 by Calvin*

**physics**

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 260 N applied to its edge causes the wheel to have an angular acceleration of 0.795 rad/s2. (a) What is the moment of ...
*November 15, 2012 by Shane*

**physics**

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to its edge causes the wheel to have an angular acceleration of 1.053 rad/s2. (a) What is the moment of ...
*November 30, 2012 by heather*

**physics**

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 280 N applied to its edge causes the wheel to have an angular acceleration of 0.960 rad/s2. (a) What is the moment of ...
*March 8, 2015 by alba*

**physics**

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 270 N applied to its edge causes the wheel to have an angular acceleration of 0.854 rad/s2. (a) What is the moment of ...
*April 2, 2016 by joanna*

**Calculus**

I wanted to know how you would know that -4x^2 + 2x +90 / x-5 would be able to factor down to (x-5)(-4x-18)/x-5 By looking at -4x^2 + 2x +90 / x-5 , I would never think that it could be factored down to (x-5)(-4x-18)/x-5 How should I approach it so I know that it could be ...
*September 17, 2009 by Z32*

**physics HELP!!**

3. A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the ...
*February 20, 2007 by Katrina*

**physics**

An 8.56 kg block of ice at 0 degrees celsius is sliding on a rough horizontal icehouse floor (also at 0 degrees celsius) at 15.6 m/s. Assume that half of any heat generated goes into the floor and the rest goes into the ice. How much ice (in kg) has melted after the speed of ...
*December 4, 2009 by AE*

**physics**

a bullet of mass 0.06kg is fired into a block of wood. if the bullet is moving at 330 m/s as it enters the block and takes 0.15m to stop, find: A) the avg force required to stop the mullet b) the impulse exerted by the wood on the bullet c)change in momentum of bullet
*March 25, 2008 by kin*

**physics**

A 25.5- kg block (m1) is on a horizontal surface, connected to a 5.7- kg block (m2) by a massless string as shown in the Figure. The pulley is massless and frictionless. A force of 239.3 acts on m1 at an angle of 32.1 . The coefficient of kinetic friction between m1 and the ...
*March 3, 2014 by Chris*

**Physics**

A large uniform chain is hanging from the ceiling, supporting a block of mass 48kg. The mass of the chain itself is 15 kg, and the length of the chain is 2.6 m. The acceleration of gravity is 9.81 m/s^2 Find the tension in the chain at the point where the chain is supporting ...
*September 24, 2012 by sam*

**Physics**

A motorbike starts from rest at time t=0 and begins to accelerate around a circular track as shown in the figure below. Eventually, at time t=t1 the motorbike reaches the maximum velocity possible without slipping off the track. What's the minimum length in meters the ...
*May 6, 2013 by Mathslover Please help*

**Physics help**

A motorbike starts from rest at time t=0 and begins to accelerate around a circular track as shown in the figure below. Eventually, at time t=t1 the motorbike reaches the maximum velocity possible without slipping off the track. What's the minimum length in meters the ...
*May 8, 2013 by Mathslover Please help*

**physics**

A 48.0 kg diver steps off a 10.0 m high diving board and drops straight down into the water. If the diver comes to rest 5.0 m below the surface of the water, determine the average resistance force exerted on the diver by the water. N
*January 3, 2011 by Anonymous*

**Physics**

A 45.0 kg diver steps off a 8.0 m high diving board and drops straight down into the water. If the diver comes to rest 5.0 m below the surface of the water, determine the average resistance force exerted on the diver by the water.
*December 8, 2015 by Help!!!!*

**Physics**

A car, starting from rest, accelerates down a hill reaching 30.0 m/s in 6.00 s. During this time, the driver notices that the fuzzy dice hanging by a string from the ceiling is perpendicular to the ceiling. Find (a) the angle θ of the hill and (b) the tension in the string.
*July 24, 2012 by Chad*

**physics**

a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?
*January 14, 2013 by Kalynn*

**physics**

a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?
*January 14, 2013 by Kalynn*

**PHYSICS SPECIFIC GRAVITY**

A 6.8 kg block of some unknown material is suspended from a spring scale and submerged in water. The spring scale reads 48.0 N. What is the specific gravity of the block?
*April 25, 2016 by Chris*

**Math**

From the top of a 200 foot building, a bird is sighted overhead and a man is observed directly below the bird at ground level. The angle of elevation of the bird is 16*, and the angle of depression of the man is 43* find : a) the distance from the top of the building to the ...
*December 15, 2015 by Anonymous*

**physics**

A car sits in an entrance ramp to a freeway, waiting for a break in the traffic. The driver sees a small gap between a van and an 18-wheel truck and accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves in a straight line, ...
*September 29, 2013 by Emma*

**Physics - Check my work please :)**

Check this please :D Which of the following three statements used to describe work are true: i)Work is done only if an object moves through a distance ii)Work is done only if energy is transferred from one form to another iii)Work is done only if a force is applied In which of...
*December 12, 2011 by Kellie*

**ap Physics**

1. a)A 15.6 kg block is dragged over a rough, horizontal surface by a constant force of 72.2 N acting at an angle of angle 34.8 above the horizontal. The block is displaced 24.6 m and the coefficient of kinetic friction is 0.234.Find the work done by the 72.2 N force.The ...
*February 26, 2011 by jeff*

**PHYSICS**

A 75 kg box starts from the top of a ramp at point A. The coeff of fric. between surface & box is 0.275. The avg. normal force of the surface on the box (while it is on the ramp) is 3/4 of its weight. A) What is the velocity of the box right before it hits the spring at point ...
*April 13, 2016 by T.*

**Physics**

A soccer player kicks a 0.43 kg ball straight up to see how far it will rise. The ball starts with a velocity of 16m/s at a height of 0.85m above the ground. It rises then falls straight down to the ground. a) what is the total energy of the ball just after it is kicked? b) ...
*May 4, 2014 by cee*

**Science**

A 110.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 35.0 deg with the horizontal. Find the magnitude of the applied force F.
*October 26, 2011 by Mark*

**Physics - Circular motion**

A marble of mass m is placed on top of a bowling ball of radius r and allowed to roll from rest. derive the angle from centre of circle at which the marble loses contact with bowling ball. assume there is no friction between marble and bowling ball.
*September 5, 2010 by Andrew*

**physics**

. A ball, initially at rest at t= 0 seconds, rolls with constant acceleration down an inclined plane 10 meters long. If the ball rolls 1 meter in the first 2 seconds, how far will it have rolled at t= 4 seconds?
*November 8, 2011 by Anonymous*

**Chemistry**

A block of copper at 100 degrees Celsius comes in contact with a block of aluminum at 20 degrees Celsius. The final temp of the blocks is 60 degrees Celsius. What are the relative masses of the blocks?
*March 1, 2012 by Sue*

**Biology of Environment**

Im having hard time differentiating b/w inductive and deductive reasoning. In inductive you find patterns, then you reach conclusion, in deductive you reach conclusion based on previous known facts, but i still not quite understand. I also not get the top-down, bottom-up.
*October 12, 2013 by Mohammad*

**Programming concepts**

Develop a menu-driven program that inputs two numbers and, at the user’s option, finds their sum, difference, product, or quotient. top-down modular approach and pseudocode to design a suitable program to solve it. I am having so much trouble with this I got two zeros already ...
*August 1, 2014 by Aaron*

**science!**

1. A plane accelerated from a speed of 2.0 m/s at the rate of 3.0 m/s2 over a distance of 530 m. What is its speed after traveling this distance? 2. A jet plane must achieve a velocity of 71 m/s for takeoff. From rest and with a 1,000 m long runway, what must the acceleration ...
*November 3, 2011 by ray*

**math**

in an image the slanted rectangle starts at 0 over right 2 spaces. Then 2 more over to 4 up to 3 then left 2 and back to 0.what would it look after a rotation of 90 degrees about 0. a)rectangle goes to the left in quadrant 2. b)rectangle goes down in the 4 quadrant. c)...
*May 19, 2014 by gwen*

**Math**

From the top of a 200 foot building, a bird is sighted overhead and a man is observed directly below the bird at ground level. The angle of elevation of the bird is 16*, and the angle of depression of the man is 43* find : a) the distance from the top of the building to the ...
*December 14, 2015 by Kiaus*

**College Physics**

If m_A=15.0kg and m_B =3.0kg, determine the magnitude of the acceleration of each block. If initially m_A is at rest 1.300m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely? If m_B=1.0, how large must m_A...
*September 23, 2009 by Alyssa*

**Physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.5 m/s2 for 3.6 seconds. It then continues at a constant speed for 10.1 seconds, before applying the brakes such that the ...
*January 24, 2011 by Hayls*

**Physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5 m/s2 for 4.2 seconds. It then continues at a constant speed for 11.1 seconds, before applying the brakes such that the car’...
*January 21, 2015 by Isaiah*

**AP physics**

A 1280-kg car starts from rest and accelerates to 80 km/h in 23.0 s. Friction exerts an average force of 449 N on the car during this time. (a) What is the net work done on the car? J (b) How far does the car move during its acceleration? m (c) What is the net force exerted on...
*May 10, 2012 by Alica*

**trig**

A race driver has a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.5 m/s^2; after 3.6 s he enters the main speedway. At the same instant, another car on the speedway and traveling at a constant ...
*February 5, 2012 by Anonymous*

**Physics**

A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. Force is 8.67N. Also mass displacement is .2m ...
*March 1, 2008 by Andrea*

**science**

I need help with this problem:you live in the middle of a block that is square and one mile around. there is a stop sign on each corner. if your carcan only accelerate and brake at one meter per second per second, describe how you would get around the block in the fastest way.
*October 28, 2006 by mr. jingles*

**Physics**

A 645-kg elevator starts from rest and reaches a cruising speed of 1.47 m/s after 3.13 seconds. It moved 2.75 m during that time. What average power (W) is delivered by the motor during the initial acceleration of the elevator during the first 3.13 seconds? The correct ...
*June 6, 2011 by Casey*

**Physics**

A car starts from rest and accelerates at a rate of 1 m/s^2 until it reaches a velocity of 7 m/s. It then travels at a constant velocity for the next 15 seconds. The driver then applies the brake, bringing the car to stop. The brakes provide an acceleration of -4 m/s^2. a) ...
*September 14, 2014 by Ulash*

**Math**

A conical water tank with vertex down has a radius of 10 feet at the top and is 29 feet high. If water flows into the tank at a rate of 10 , how fast is the depth of the water increasing when the water is 17 feet deep?
*October 15, 2009 by Salman*

**Physics**

Kathy is changing the tire of her car on a steep hill 20 m high. She trips and drops the 10 kg spare tire which rolls down the hill. What is the speed of the tire at the top of the next hill if the height of the hill is 5 m high?
*May 17, 2011 by Kelsey*

**math**

A ladder 10 m long rests on horizontal ground and leans against a vertical wall. The foot of the ladder is pulled away from the wall at 2 m/s. How fast is the top sliding down the wall when the foot of the ladder is 6m from the wall?
*May 3, 2013 by Grant*

**physics**

A series of two 2.0 kg blocks are attached together through string B.Two of the blocks weigh each 2.0 kg and are now being use for a new experiment. The blocks are being pulled upwards by another string A with a force of 25 N. What is the acceleration of the blocks?(3.55 m/s^...
*January 24, 2015 by Anonymous*

**physics**

A series of two 2.0 kg blocks are attached together through string B.Two of the blocks weigh each 2.0 kg and are now being use for a new experiment. The blocks are being pulled upwards by another string A with a force of 25 N. What is the acceleration of the blocks?(3.55 m/s^2...
*January 24, 2015 by Anonymous*

**physics**

In the following situations identify the agent exerting the force and the object on which it acts .State the effect and kind of force in each case. a>Falling of rain drops. b>A horse pulling a cart. c>A car coming to rest once its engine is switched off. d>The ...
*June 18, 2015 by deepti*

**LA plz help ms.sue**

2.Which excerpt from the play best supports the answer to the reason Anne spends time with Peter? A I’m sorry Mother. I’m going to Peter’s room. I’m not going to let Petronella Van Daan spoil our friendship. B I mean, every time I go into Peter’s room, I have a feeling I may ...
*April 8, 2015 by Anonymous*

**English**

In our text discussion, we compared a two-way conversation with a top-down situation, such as that which students encounter when listening to a lecture. What was this comparison intended to illustrate? A. The need to pay attention to an instructor’s lecture B. The value of ...
*April 30, 2015 by clary*

**Music**

1. How many does the whole rest occupy? A. 1 B. 2** C. 3 D. 4 3. How many beats of rest would the combination of a half note and quarter note create? A. 1 B. 2 C. 3** D. 4 4. How many sixteenth notes would it take to rest for an entire measure in 3/4 time. A. 8** B. 12 C. 16 D...
*September 24, 2015 by Shi Buringa*

**Physics**

A 1.4-kg object moves along the x axis, subject to the potential energy shown in the figure. If the object's speed at point B is 1.70 m/s, what are the approximate locations of its turning points? ___________m (left-hand turning point) ___________m (right-hand turning point...
*May 2, 2015 by Anonymous*

**Physics**

A 55.0 kg girl is roping through the top of a tiny tree. She quickly swings down from her 12.0 m high perch and grabs a 21.0 kg dog as she swings. They barely swing back up to a tree limb. How high is this tree limb?
*February 15, 2011 by J*

**calculus**

A conical water tank with vertex down has a radius of 12 feet at the top and is 23 feet high. If water flows into the tank at a rate of 20 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 17 feet deep?
*November 30, 2012 by Mike*

**math**

A conical water tank with vertex down has a radius of 13 feet at the top and is 28 feet high. If water flows into the tank at a rate of 10 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 17 feet deep?
*November 3, 2015 by PAT*

**math/geometry**

In the course of one five-month period, the water level of a lake went down 6 in., up 12 in., down 3 in., down another 16 in., and up 4 in. How much had the lake level changed at the end of the five months?
*September 17, 2012 by rose gaskell*

**Nutrition**

Are vegetables comprised primarily of carbs, proteins or fat? I'm talking about the digestive system and I want to know what enzyme breaks down vegetables. Pepsin breaks down proteins which is like meat. Gastric lipase breaks down fats which is like cheese and amylase breaks ...
*April 5, 2010 by Lena*

**Physics for life scince**

6.At the end of the 7th second the brakes are applied and the car slows down at a constant rate till it comes to rest in 5s. What is the acceleration? 7.Draw the v vs.t graph 8.find the final displacement: a)by using the graph b)by algebraic calculations using relevant formulae
*March 23, 2010 by Simeon*

**calculus**

: A 20m ladder is placed against a wall. The bottom of the ladder is slipping at the rate of 2m/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 12m from the wall
*October 19, 2010 by awesome*

**Physics**

A spring with spring constant 14.0 N/m hangs from the ceiling. A 490 g ball is attached to the spring and allowed to come to rest. It is then pulled down 8.00 cm and released. What is the time constant if the ball's amplitude has decreased to 2.90 cm after 31.0 oscillations?
*November 19, 2010 by Michael*

**Physics**

A spring with spring constant 20.0 hangs from the ceiling. A 590 ball is attached to the spring and allowed to come to rest. It is then pulled down 7.10 and released. What is the time constant if the ball's amplitude has decreased to 2.40 after 58.0 oscillations?
*May 16, 2012 by Roan*

**English **

Which of the following best combine the two sentences. "He sat down silently. He was desperate." a. Silently and desperately, he sat down. b. Silently, desperately, he sat down c. Silently, he sat down, desperately. Is choice a correct? Thanks.
*June 26, 2010 by Jon.*

**Algebra**

An elevator went to the do of a 180m building, stayed for 1 minute, then came down. The total time was 3.5 minutes. If the speed of the elevator when it went up was 1 m/sec less than when it came down, find both speeds (up and down).
*May 20, 2010 by Steven*

**Re: PHYSICS**

"Relative" is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring has negligible mass and...
*February 27, 2007 by COFFEE*

**GenChemistry**

Exposure to high doses of microwaves can cause tissue damage. Estimate how many photons with a wavelength = 12cm, must be absorbed to raise the temperature of your eye by 3.0 deg C. Assume the mass of the eye is 11g and its specific heat is 4.0 J/gK
*December 8, 2010 by Jake*

**math - calc**

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
*October 1, 2013 by Greg*

**math - calc**

A conical water tank with vertex down has a radius of 12 feet at the top and is 26 feet high. If water flows into the tank at a rate of 30 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
*October 1, 2013 by Greg*

**Calculus (math)**

A conical water tank with vertex down has a radius of 12 feet at the top and is 23 feet high. If water flows into the tank at a rate of 20 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 12 feet deep?
*October 25, 2014 by mariel*

**physics**

A girl starting from rest at the top of a 40 m jump, inclined at 30º above the horizontal, has 0.15 coefficient of friction. The jump ends with a frictionless, horizontal part. How far does she land away from the jump, which is 50 m above the horizontal land below?
*October 20, 2011 by hum*

**physics**

A girl starting from rest at the top of a 40 m jump, inclined at 30º above the horizontal, has 0.15 coefficient of friction. The jump ends with a frictionless, horizontal part. How far does she land away from the jump, which is 50 m above the horizontal land below?
*October 21, 2011 by ho*

**physics**

I have a question based off of the response to the question I posted below. A dragster and driver together have mass 918.8 kg. The dragster,starting from rest,attains a speed of 25.8 m/s in .53s . Find the average acceleration of the dragsters during this time interval. Answer...
*July 4, 2011 by alexa*

**Math **

Sagal works as a DJ at a local radio station.On occasion, she chooses some of the songs she will play based on the phone-in requests recieved by the switchboard the previous day. Sagal's list of 200 possible selections includes a)100 songs in the top 100 b)134 hard-rock songs ...
*January 19, 2011 by Rania*

**Physics**

A 15 g lead bullet is tested by firing it into a fixed block of wood with a mass of 1.05 kg. The block and the embedded bullet together absorb all the heat generated. After thermal equilibrium has been reached, the system has a change in temperature measured as 0.020 oC. ...
*September 20, 2010 by Eric*

**Physic**

Two blocks, m1 = 4 kg and m2 = 2 kg, are in contact with each other and are on a horizontal surface for which the coefficient of kinetic friction is 0.1. A 34 N horizontal force acts on block 1, making both blocks move in the direction of block 2. 34N --> (m1)(m2) --> ...
*October 23, 2015 by Anonimus*

**Calculus**

A ladder 8 meters long is leaning against a wall. If the top of the ladder is slipping down at the rate of 8 meters per second, how fast is the bottom moving away from the wall when it is 7 meters from the wall? Please give your answer in , enter it without the units.
*October 24, 2011 by TraiShaun *