Wednesday

August 20, 2014

August 20, 2014

Number of results: 33,018

**physics**

A 12 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 100 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 100 kg mass dangles over the pulley...
*June 3, 2007 by naomi*

**Physics**

A 2.00kg mass is hanging on a vertical compressed spring 1.0 m above the floor.The spring constant is 75N/m and the spring is compressed 0.90m. The mass is released so that it falls vertically.Determine 1) The acceleration of the mass when it was dropped. 2) The speed of the ...
*June 19, 2012 by roger*

**Math**

Write the argument below in symbols to determine whether it is valid or invalid. State a reason for your conclusion. Specify the p and q you used. Either the gazebo is made of wood or the vine is growing on the gazebo. The gazebo is not made of wood. The vine is growing on the...
*July 15, 2011 by Jen*

**Writing**

I'm writing a paper on comparing and contrasting the emotional characteristics of Elizabeth from Pride and Prejudice and Jane from Jane Eyre, and need help with my thesis. My working thesis is: Elizabeth Bennett and Jane Eyre tend to let subconscious feelings rule their ...
*November 7, 2007 by Angela*

**math**

the top of a hill is 40m tall. the horizontal distance from the runaway is 325 m. if the pilot clear the top of the hill by 45 m, what is the angle of takeoff?
*March 20, 2012 by shuntea*

**science**

If Two bodies of same mass is thrown from top of a tower with same speed simultaneously.one (x) is thrown vertically downward and another(y) is thrown horizontally then what will happen?
*April 23, 2014 by baiju*

**physics**

A cannon ball is fired horizontally with an initial speed of 75 m/s from the top of a 50 m tall building. When the ball hits the ground, its velocity vector makes an angle with the horizontal. What is the angle?
*September 18, 2013 by Tonya*

**physics**

A cannon ball is fired horizontally with an initial speed of 75 m/s from the top of a 50 m tall building. When the ball hits the ground, its velocity vector makes an angle with the horizontal. What is the angle?
*September 18, 2013 by Tonya*

**University math grade 11 Trig**

A very tall light standard is swaying in an east-west direction in a strong wind. An observer notes that the time difference between the vertical position and the furthest point of sway was 2 seconds. The pole is 40 metres tall. At the furthest point of sway, the top of the ...
*June 20, 2009 by Liza*

**Physics**

If a 2 m tall man is looking at a plane mirror from an eye which is 20 cm from the top of his head, what is the minimum length that the mirror must be so that he can just barely see his whole body in the mirror? How far up from the ground must the mirror be placed? I'm ...
*February 24, 2009 by Brock*

**English**

1. Jane and Mike are the same in score. Jane and Mike are the same in a score. Jane and Mike are the same in the score. (For example, Jane got 90 points. Mike also got 90 points.) Which expression is correct? 2. How does the baby look? It looks sleepy. (Is the question or ...
*March 8, 2009 by John*

**Math- Pre calc**

A 60 foot antenna stands on top of a building. From a point on the ground, the angle of elevation to the top of the antenna measures 48 degrees and 39 degrees to the top of the building. How tall is the building?
*November 17, 2011 by Chell*

**physics**

If we are running on a threadmill with a speed such that I appear stationary and throw a ball, will the ball go further as compared to one who throws the ball while he is standing stationary. The concern is that though I appear stationary while I am running on a threadmill, I ...
*February 18, 2011 by HK*

**physics**

In a scene in an action movie, a stunt man jumps from the top of one building to the top of another building 4.9 m away. After a running start, he leaps at an angle of 17 ◦ with respect to the flat roof while traveling at a speed of 5.8 m/s. The acceleration of gravity ...
*November 7, 2013 by Anonymous*

**Physics**

A penny is dropped from rest from the top of a very tall building. Assuming the height of the building is 406 m and ignoring air resistance, find the speed with which the penny strikes the ground.
*January 27, 2012 by Candy*

**physics**

. A cannon ball is fired horizontally with an initial speed of 75 m/s from the top of a 50-m tall building. When the ball hits the ground, its velocity vector makes an angle θ with the horizontal. What is θ ?
*June 27, 2013 by vector*

**AP physics**

Lucy is using a programmable treadmill. She inputs a top speed into the treadmill and presses "start." The treadmill accelerates from rest at 0.100 m/s2 until it reaches that speed, after which it stays at that constant speed. Later, when she is getting tired, she hits the "...
*October 1, 2012 by Philip*

**Physics**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 8.2 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 62° when they move past the window. How fast is ...
*September 3, 2007 by Student*

**physics**

Workers who wash windows or paint the outside of buildings use an interesting contraption known as a painter's lift. This consists of a harness that the worker wears suspended by a rope. The rope runs through a pulley mounted on the roof of the building and back down to hang ...
*June 7, 2013 by jiskha*

**physics**

Workers who wash windows or paint the outside of buildings use an interesting contraption known as a painter's lift. This consists of a harness that the worker wears suspended by a rope. The rope runs through a pulley mounted on the roof of the building and back down to hang ...
*June 7, 2013 by keshav*

**science**

a person standing on a road has to hold his umbrella at 60 degree vertical to keep the rain away he throws the umbrella and starts running at 20 m/s he finds that rain drops are falling in him vertically. find the speed of the rain drops with respect to 1.the road 2.the moving...
*July 1, 2012 by jo145578*

**maths**

from a point on the ground the angle of elevation of the bottom and top of a flagstaff situated on top of a 120 m tall house is 30 and 45 degrees respectively.find the height of the flagstaff.
*December 27, 2012 by nimisha*

**math / geometry**

Write the argument below in symbols to determine whether it is valid or invalid. State a reason for your conclusion. Specify the p and q you used. Submit your full detailed solution to the dropbox. If the gazebo is made of wood, then the vine is growing on the gazebo. The vine...
*March 4, 2012 by Steve*

**fractions**

fraction word problem. please advise on how to work the problem Phillip and Jane had a pie each. Phippip ate 1/4 of his and Jane ate more of the pie than Phillip. Which fraction of his pie could Jane have eaten. Possible answers: 2/5 1/6 2/8 or 1/8
*June 9, 2011 by Suzanne*

**Physics**

A 5.0-kg box at the top of a 400cm ramp slides down 200 cm. How much gravitational potential energy was lost as the box slides from the top of the ramp to the 200 cm mark of the ramp? A cheerleader is thrown vertically upward into the air. As the cheerleader rises, which one ...
*November 21, 2007 by Alex*

**physics**

A load of 46 N attached to a spring that is hanging vertically stretches the spring 0.23 m. What is the spring constant? Answer in units of N/m.
*February 24, 2011 by kelsi*

**physics**

A load of 46 N attached to a spring that is hanging vertically stretches the spring 0.23 m. What is the spring constant? Answer in units of N/m.
*February 24, 2011 by kelsi*

**physics**

A load of 46 N attached to a spring that is hanging vertically stretches the spring 0.10 m. What is the spring constant? Answer in units of N/m
*December 19, 2012 by Anonymous*

**Algebra 2**

Can somebody help with these. Simplify (be sure to rationalize all denominators) 11. 3/[SQRT(5) - 2] and this.. Note: I only need help on the b part of the question.. 15. Assume that a surveyor stands at the top of a mountain that is “h” feet tall. If the distance (in feet) ...
*March 12, 2009 by Mike*

**physics**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.15 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25° when they move past the window, as the ...
*September 19, 2010 by ba*

**Physics**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 3.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 60° when they move past the window, as the drawing...
*February 16, 2014 by Steph*

**physics**

Jeff of the Jungle swings on a vine that is r = 6.40 m long. At the bottom of the swing, just before hitting a tree, Jeff's linear speed is 7.10 m/s.
*October 29, 2012 by Jeff of the Jungle swings on a vine that is r = 6.*

**Physics Urgent please help**

A spring of negligible mass, spring constant k = 82 N/m, and natural length l = 1.2 m is hanging vertically. This is shown in the left side where the spring is neither stretched nor compressed. In the central one, a block of mass M = 5 kg is attached to the free end. When ...
*October 15, 2013 by ss01*

**physics**

A 34.2 -kg block rests on the oor. (a) What force (N) does the oor exert on the block? (b) If a rope is tied to the block and run vertically over a pulley, and the other end is attached to a free-hanging 5.6 kg weight, what force (N) does the oor now exert on the block? (c) If...
*August 6, 2011 by waqas*

**Physics**

A load of 47 N attached to a spring that is hanging vertically stretches the spring 0.22 m. What is the spring constant?
*February 16, 2012 by Joanne*

**physics**

A load of 46 N attached to a spring that is hanging vertically stretches the spring 0.10 m. What is the spring constant?
*February 16, 2012 by imel*

**Math**

Hannah makes necklaces. She has a box of 26 green beads, 42 yellow beads, and 10 blue beads. If Hannah grabs 1 bead without looking, what is the probability that she will select a blue bead?
*January 10, 2013 by Shalontae*

**physics**

Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. the hanging block has a mass of 16 kg and the one on the plane has a mass of 8 kg. the coefficient ...
*January 18, 2010 by emm*

**physics**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 36° when they move past the window as the...
*September 6, 2010 by demi*

**physics**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 8.1 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of θ = 25° when they move past the window as the...
*February 3, 2012 by Cody*

**College Physics 1**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.17 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25° when they move past the window, as the ...
*September 20, 2013 by Autianna*

**College Physics**

Answer the following questions for a mass that is hanging on a spring and oscillating up and down with simple harmonic motion. Note: the oscillation is small enough that the spring stays stretched beyond its rest length the entire time. Options for each question are (Top, ...
*February 19, 2012 by Jerry*

**Physics(Please respond)**

1) David has a mass of 86.4-kg and is skating with in-line skates. He sees his 24.8-kg younger brother up ahead standing on the sidewalk, with his back turned. Coming up from behind, he grabs his brother and rolls off at a speed of 2.99 m/s. Ignoring friction, find david's ...
*June 3, 2012 by Hannah*

**Physics**

A 65kg trampoline artist jumps vertically upward from the top of a platform with a speed of 5.0m/s. a) How fast is he going as he lands on the trampoline, 3.0m below. b) if the trampoline behaves like a spring with a spring stiffness constant 6.2*10^4N/m, how far does he ...
*February 23, 2011 by Emily Grossman*

**math**

Is there a formula to sum the digits between two numbers? eg. 1 to 20 = 1+2+3+4+5+6+7+8+9+1+0+1+1+1+2+1+3+1+4+1+5+1+6+1+7+1+8+1+9+2+0 = ?? I am looking for the numbers 1 to 2008 so I really need a formula! Please help, thank you. Jane
*May 12, 2009 by Jane*

**Physics**

A box of mass 1kg is placed on a table and is connected to a hanging mass m by a string strung over a pulley. If the coefficient of kinetic friction between the box and the table is .3 and the box slides at a constant speed of .5m/s what is the weight of the hanging mass? to ...
*November 14, 2007 by Andrea*

**Physics **

From your vantage point on the roof of your 6.5 m tall apartment building you are launching water balloons over the 3.5 m wall at the back of your complex. The large singlshot is launching the balloons horizontally such that they just barely clear the wall 12m away. (a) How ...
*June 10, 2012 by 1234*

**Physic**

In a dramatic lecture demonstration, a physics professor blows hard across the top of a copper penny that is at rest on a level desk. By doing this at the right speed, he can get the penny to accelerate vertically, into the airstream, and then deflect it into a tray. Assuming ...
*May 7, 2011 by Chao*

**Critical Thinking**

Do I have this right? Jane or Tom will wake up Tanner this evening. Compound: Yes Conditional: Yes Antecedent: Jane or Tom Consequent: Will wake up Tanner this evening. Contradictory: Neither Jane or Tom will wake up Tanner. Contrapositive: ?
*November 16, 2007 by Diane*

**physics**

A ring fixed to a support at the top is hanging vertically. A bead of mass m slides through the ring and is connected to the support through a spring of stiffness k as shown in the figure-1. The length of the unstretched spring is almost negligible. Note that gravity acts. a. ...
*December 30, 2011 by nain abbas*

**Physics(Please respond)**

1) A penny is dropped from rest from the top of a very tall building. Assuming the height of the building is 407 m and ignoring air resistance, find the speed with which the penny strikes the ground. I am not sure how to start this. Thank you!
*May 26, 2012 by Hannah*

**Pre -calculus**

An observer 2 km from the launching pad observes a vertically ascending missile at an angle of elevation of 21 degrees. 5 seconds later the nagle has increased to 35 degrees. What was its average speed during this interval? If it keeps going vertically at the same average ...
*December 5, 2010 by H*

**Physics - Bernouli **

Water flows with constant speed through a garden hose that goes up a step 20.0 cm high. 1. If the water pressure is 143 kPa at the bottom of the step, what is its pressure at the top of the step? Now suppose the cross sectional area of the hose at the top of the step is ...
*November 14, 2012 by Chong*

**physics**

A student drops a ball from the top of a tall building; the ball takes 2.4 to reach the ground. What was the ball’s speed just before hitting the ground? (this is excluding everything like air resistance, etc)
*September 3, 2010 by Brittany*

**physics**

Workers who wash windows or paint the outside of buildings use an interesting contraption known as a painter's lift. This consists of a harness that the worker wears suspended by a rope. The rope runs through a pulley mounted on the roof of the building and back down to hang ...
*June 4, 2013 by keshav*

**Physical Science-Can someone check my answers?**

1) The kinetic energy of an object depends on which of the following? A. the object’s mass and direction B. the object’s speed and mass---------- C. the object’s work and direction D. the object’s speed and work 2) In the following situations, which one does not have kinetic ...
*February 18, 2014 by dark1*

**physics**

A ball is thrown horizontally, with a speed of 20 m/s from the top of a 6.2 m tall hill. How far from the point on the ground directly below the launch point does the ball strike the ground?
*October 28, 2010 by Ryan*

**physics**

A ball is thrown horizontally, with a speed of 20 m/s from the top of a 6.2 m tall hill. How far from the point on the ground directly below the launch point does the ball strike the ground?
*October 28, 2010 by Ryan*

**Physics**

A spring (k=302 N/m) placed vertically on a surface has a 548 g ball placed on top of it. How far must the spring be compressed in order for the ball to be traveling at a speed of 2.8 m/s when it is located 438 cm above its initial position?
*December 15, 2013 by Megan*

**Physics**

A spring (k=302 N/m) placed vertically on a surface has a 548 g ball placed on top of it. How far must the spring be compressed in order for the ball to be traveling at a speed of 2.8 m/s when it is located 438 cm above its initial position?
*December 15, 2013 by Bart*

**Physics**

A ball (m = 250g) on the end of string swings in 1.2 m radius that tolerates 20 N. At what speed does the string breaks if a) the rings swings horizontally ? b) the rings swing vertically? I think I got a) right: T=mv2/r ---> v=(sqr)Tr/m v=(sqr) 20x1.2/0.25= 9.8 m/s Given ...
*May 18, 2014 by Physics: Circular Motion?*

**algebra**

a long distance runer started running a course, running at an average speed of 2 mph. 1.33 hrs later, a cyclist travelde the same course at an average speed of 4 mph. how many hrs after the runner started did the cyclist overtake the runner? round answer to the nearest tenth.
*February 2, 2008 by tina*

**Critical Thinking**

If anyone could please help me with this!!Jane or Tom will wake up Tanner this evening. Compound: Yes Conditional: Yes Antecedent: Jane or Tom Consequent: Will wake up Tanner this evening. Contradictory: Neither Jane or Tom will wake up Tanner. Contrapositive: ?
*November 16, 2007 by Diane*

**physics**

A solid uniform sphere is released from the top of an inclined plane .25 m tall. the sphere rolls down the plane without slipping and there is no energy lost from friction. What is the translational speed of the sphere at the bottom of the incline?
*April 30, 2014 by Anonymous*

**Econ MC**

Dick owns a dog whose barking annoys Dick's neighbor Jane. Suppose that the benefit of owning the dog is worth $500 to Dick and that Jane bears a cost of $700 from the barking. Assuming Dick has the legal right to keep the dog, a possible private solution to this problem is ...
*March 17, 2007 by Anonymous*

**physics**

At what speed do you approach your image if you walk towards a plane mirror at 1 m/s ? I am not looking for this to be answered for me. I am just looking for how to figure it out. Is there a specific formula to use?
*January 30, 2012 by Jonathon*

**physics**

At what speed do you approach your image if you walk towards a plane mirror at 1 m/s ? I am not looking for this to be answered for me. I am just looking for how to figure it out. Is there a specific formula to use?
*January 30, 2012 by Jonathon*

**physics**

At what speed do you approach your image if you walk towards a plane mirror at 1 m/s ? I am not looking for this to be answered for me. I am just looking for how to figure it out. Is there a specific formula to use?
*January 30, 2012 by Jonathon*

**Physics**

A 79.0-kg fullback running east with a speed of 4.00 m/s is tackled by a 93.0-kg opponent running north with a speed of 3.00 m/s. (a) Why does the tackle constitute a perfectly inelastic collision? (b) Calculate the velocity of the players immediately after the tackle. ...
*October 4, 2011 by Allie*

**Trigonometry**

a flagpole 25 feet tall stands on a top of a building. from a point in the same horizontal plane with the base of the building. The angle of elevation of the top and the bottom are 61°30' and 56°20' respectively. How high is the building?
*July 11, 2013 by Paul*

**Trigonometry**

a flagpole 25 feet tall stands on a top of a building. from a point in the same horizontal plane with the base of the building. The angle of elevation of the top and the bottom are 61°30' and 56°20' respectively. How high is the building?
*July 11, 2013 by Paul*

**simple equations ( math)**

Mary has $38 and Jane has $12. How much must Mary give Jane so that they both have the same amount>?
*January 10, 2010 by vanessa*

**Math**

If Jane had $0.58 in quarter(s), dime(s), nickle(s), and pennies she has a total of 9 coins. What coins does Jane have?
*January 4, 2009 by Sharika*

**Math Ratios**

Mary, Jane and Sally shared 756 sweets in the ration of 6:3:5 respectively. How many sweets did Jane get?
*September 8, 2012 by Dottie*

**physics**

if the rolling ball represents the running vaulter and the ruler represents the pole in the model, how does the amount of bend in the pole depend on the vaulters running speed? record your data and response in your log.
*March 6, 2011 by dana*

**phusics**

A ball is thrown vertically upward from top of a building with speed of 20m/s. On the way back ball misses the building and lands on the ground. Total time the ball is in air is 6 seconds. Determine the height of the building.
*February 14, 2011 by mark matat*

**Physics**

A load of 54 N attached to a spring hanging vertically stretches the spring 4.9 cm. The spring is now placed horizontally on a table and stretched 14 cm. What force is required to stretch it by this amount?
*November 23, 2010 by Kristen*

**Physics**

A load of 54 N attached to a spring hanging vertically stretches the spring 4.9 cm. The spring is now placed horizontally on a table and stretched 14 cm. What force is required to stretch it by this amount?
*November 23, 2010 by Kristen*

**Physics**

A load of 59 N attached to a spring hanging vertically stretches the spring 5 cm. The spring is now placed horizontally on a table and stretched 14 cm. What force is required to stretch it by this amount?
*November 22, 2012 by Maleka*

**PHYSICS **

Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 28.0 in a direction 60.0 west of north. Jane walks 10.0 in a direction 30.0 south of west. They then stop and turn to face each ...
*February 29, 2012 by Sharefa*

**physics**

Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 24.0 in a direction 60.0 west of north. Jane walks 10.0 in a direction 30.0 south of west. They then stop and turn to face each ...
*February 13, 2013 by meme*

**science **

A big plane mirror is fixed vertically on the back of bicyce. A boy standing in front of the mirror can see his image clearly in the plane mirror. The bicycle starts moving with the sepeed of 6 ms–1 and the boy also starts running with 4 ms–1 in the direction of bicycle motion...
*January 9, 2012 by PRAMIT*

**science**

A big plane mirror is fixed vertically on the back of bicyce. A boy standing in front of the mirror can see his image clearly in the plane mirror. The bicycle starts moving with the sepeed of 6 ms–1 and the boy also starts running with 4 ms–1 in the direction of bicycle motion...
*January 9, 2012 by aaaa*

**Math**

Pete and jan compete as a team in a biathlon. Pete runs at a speed of 9 km/ h for x hours. Jan cycles at twice Pete's running speed for 1 hour and 30 minutes. The total distance of the biathlon is 42 km. Find, in hour and minutes, Pete's running time.
*May 26, 2008 by Ephraim*

**physics**

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +3.62 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +1.66 m/s. The mass of the tackler ...
*July 8, 2013 by ODU*

**Physics**

A golf ball is released from rest from the top of a very tall building. Choose a coordinate system whose origin is at the starting point of the ball, and whose y axis points vertically upward. The acceleration of gravity is 9.8 m/s^2. a.Neglecting air resistance, calculate the...
*February 9, 2014 by Fabricus*

**Math**

It's time to plant a spring vegetable garden 1/3 will be root plants, 1/3 will be stalk plants, and 1/3 will be vine plants. 1/2 of the stalk and vine plants will be grown organically without fertilizer. What fraction of the garden will be grown organically?
*February 2, 2010 by Ana*

**physics 111**

A runner times his speed around a circular track with a circumference of 0.508 mi. At the start he is running toward the east and the track starts bending toward the north. If he goes halfway around, he will be running toward the west. He finds that he has run a distance of 0....
*September 14, 2007 by bob*

**physics**

from the top of a tower P,a ball is thrown vertically upwards.when the ball reaches a distance h below P,its speed is double of what it was at height h above P.show that the greatest height attained by the ball above P is 5h/3.
*August 25, 2011 by armando*

**physics**

Ball A is dropped from the top of a building of height h at the same instant that ball B is thrown vertically upward from the ground. When the balls collide, they are moving in opposite directions, and the speed of A is twice the speed of B. At what height does the collision ...
*August 10, 2014 by Jessica*

**Phyics**

A Rock Is Thrown Vertically upward with a speed of 12m/s. Exactly 1.00s later a ball is thrown up vertically along the same path with a speed of 18m/s. At what time will they strike each other? so far I got this but it does not seem to be working out for me. G=-9.80m/S^2 Y1=0+...
*September 16, 2009 by Joshua*

**physics**

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of 4.5m/s, grabs him. The tackler holds onto the receiver, and and the two move off together with a velocity of 2.6m/s. The mass of the tackler is ...
*March 12, 2012 by Natasha*

**physics**

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.9 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +3.4 m/s. The mass of the tackler is ...
*May 11, 2012 by chelsea*

**physics**

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.4 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +2.9 m/s. The mass of the tackler is ...
*November 6, 2013 by bam*

**Physics**

VERTICAL SPRING A spring of negligible mass, spring constant k = 89 N/m, and natural length l = 1.4 m is hanging vertically. This is shown in the left figure below where the spring is neither stretched nor compressed. In the central figure, a block of mass M = 2 kg is attached...
*October 16, 2013 by Megan*

**Trig**

A 60 ft. antenna stands on top of a building, From a point on the ground, the angles of elevation to the top and bottom of the antenna measure 58 and 44 respectively. How tall is the building
*April 5, 2011 by John*

**trig**

A person stands at a distance from the tower and eyes the top of the tower at 30 degree angle of elevation. He then walks 425 feet towards the tower and eyes the top of the tower at a 58 degree angle of elevation. The person is 5 feet tall. How tall is the tower?
*January 26, 2014 by Lynn*

**Geometry**

A man is sitting by a pool. He looks up at an angle of elevation of 18 degrees at a bird in a nest at the top of a tall tree. Since the man is 200 feet from the bird's tree. How tall is the tree?
*March 9, 2012 by hope*

**physics**

plz anyway help me for the solution of this question. from the top of a tower P,a ball is thrown vertically upwards.when the ball reaches a distance h below P,its speed is double of what it was at height h above P.show that the greatest height attained by the ball above P is ...
*September 10, 2011 by jack*

**physics**

A student drops a ball from the top of a tall building; the ball takes 2.8 s to reach the ground. 1. what was the ball's speed just before hitting the ground? 2. What is the height of the building? help please?
*October 24, 2009 by Fefe*

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