Sunday

October 23, 2016
Number of results: 20

**Pyhsics**

what is the speed of the rocket when it is 345 m above the surface of the earth?

*September 9, 2014 by Anonymous*

**Pyhsics**

A 0.02 kg-lead bullet traveling 200 m/s strikes an armor plate and comes to a stop. If all of it's energy is converted to heat that it absorbs, what is the temperature change?

*June 25, 2011 by Anonymous*

**pyhsics**

a coil of wire of cross section 0.75mm2 weighs 125g in air and 115g in water. the length of coil in cm is

*August 29, 2016 by shyambabu*

**AP PYHSICS**

A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?

*October 1, 2012 by Liz*

**Pyhsics**

The force of repulsion that two like charges exert on each other is 3.0 N. What will the force be if the distance between the charges is increased to 3 times its original value?

*March 17, 2012 by Cookie*

**pyhsics**

A 3 kg ball is traveling in a circle of radius 2 meters with a tangential velocity of 2 meters/second. Find the centripetal of the ball and the centripetal force acting on it.

*January 25, 2014 by Dwayne*

**Pyhsics **

What would be the final temperature of a mixture of 50 g{\rm g} of 17∘C^\circ C water and 50 g{\rm g} of 44∘C^\circ C water? I have no clue where I should even begin please help.

*April 10, 2014 by Kimmie *

**Pyhsics **

The weight of the atmosphere above 1 m2{\rm m}^{2} of Earth's surface is about 100,000 N{\rm N}. Density, of course, becomes less with altitude. But suppose the density of air were a constant 1.2 kg/m3{\rm kg}/{\rm m}^{3}. Calculate where the top of the atmosphere would be. ...

*April 10, 2014 by Kimmie *

**pyhsics**

a parachutist of total mass 75 kg jumps from an aeroplane moving at a speed of 60m/s at a height of 900 m above the ground. Her parachute reduce the speed of descent to 5m/s. calculate the decrease in her gravitational potential energy store as a result of her descent.

*October 18, 2016 by PUKKA*

**Pyhsics**

A sled slides down a snow-covered hill at CONSTANT SPEED. If the hill makes an ANGLE of 10degrees ABOVE THE HORIZONTAL, WHAT IS THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE SLED AND THE SNOW? ~>HELP!

*October 19, 2009 by Shane*

**pyhsics**

The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

*April 3, 2014 by Phil*

**pyhsics**

A ball with a mass of 0.8 kg is kicked up the ramp with an initial speed of 22 m/s. What is the speed [m/s] of the ball at the top assuming no friction? Angle from which ball is kicked is 23 degrees and the horizontal leg is 7 feet long.

*October 18, 2011 by Jimmy*

**pyhsics**

A 1kg projectile is fired at 10m/s from a 10kg launcher. The momenta of the projectile and the launcher have the same magnitude, but opposite directions. Show that the KE of the projectile is 10 times gerater that the KE of the recoiling launcher. KE = 1/2mv^2? do you add the ...

*April 6, 2010 by sherri*

**pyhsics**

At t= 1.0s, a 0.61 kg object is falling with a speed of 6.0 m/s. At t= 2.0s, it has a kinetic energy of 25 J. 1. What is the kinetic energy of the object at t= 1.0s? 2. What is the speed of the object at t= 2.0s? 3. How much work was done on the object between t= 1.0s and t= 2...

*March 15, 2011 by Alan*

**pyhsics**

So I already got the answer for the first part: An airplane is flying in a horizontal circle at a speed of 102 m/s. The 80.0 kg pilot does not want the centripetal acceleration to exceed 6.18 times free-fall acceleration. Find the minimum radius of the plane's path. The ...

*November 19, 2012 by julie*

**pyhsics**

A man drops a rock off the side of a cliff, and hears it hit the bottom 2.8 seconds later. If the average speed of sound is 335 m/s, how high is the cliff? I have been able to figure out this much, but I don't know how to solve the problem with the data that I have been given...

*October 24, 2014 by JJ*

**pyhsics**

A cannonball is shot (from ground level) with an initial horizontal velocity of 36.0 m/s and an initial vertical velocity of 21.0 m/s. 1) What is the initial speed of the cannonball? 2) What is the initial angle θ of the cannonball with respect to the ground? 3) What is ...

*September 8, 2012 by ali*

**Pyhsics **

A) On planet X, an object weighs 19.2 N. On planet B where the magnitude of the free-fall acceleration is 1.17 g (where g = 9.8 m/s2 is the gravitational acceleration on Earth), the object weighs 34.9 N. The acceleration of gravity is 9.8 m/s2 . What is the mass of the object ...

*November 28, 2014 by Kim *

**Pyhsics(Stress&Strain)**

1) Calculate the tensile stress in a 33.000mm diameter rod subjected to a pull of 30.000kN. ANS= MPa (Round to 3 decimal places) Diameter = 33.000mm = 0.033m 30.000kN = 30000N Area = pi*d^2/4 = 3.1416 * 0.033^2/ 4 = 3.1416 *0.001089/ 4 = 0.0034212024/ 4 = 8.553006*10^-4 = 0....

*June 29, 2013 by Danny*

**PYHSICS**

Vector A with arrow is directed along the positive y-axis and has magnitude 9.0 units. Vector B with arrow is directed along the negative x-axis and has magnitude 4.0 unit. (a) What are the magnitude and direction of A with arrow + B with arrow? magnitude Incorrect: Your ...

*February 1, 2015 by LAIALI*

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