
package of mass 10 kg sits at the equator of an airless asteroid of mass 6.8 105 kg and radius 46 m, which is spinning so that a point on the equator is moving with speed 4 m/s. We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid...

A person skateboarding with a constant velocity

Consider a frictionless track as shown in the figure below. A block of mass m1 = 5.40 kg is released from A. It makes a head on elastic collision at B with a block of mass m2 = 12.0 kg that is initially at rest. Calculate the maximum height to which m1 rises after the collision. height = 5m

A rotating cylinder about 16 {\rm km} long and 8.0 km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it will experience the same acceleration due to gravity as on Earth?

An 82kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25 m. What is the net force exerted on the skier, assuming his acceleration is constant?

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. Neglecting air resistance, calculate the ve locity of the ball after 2.97 s. The acceleration of...

A 7400 boxcar traveling at 16.0 strikes a second boxcar at rest. The two stick together and move off with a speed of 6.0 .What is the mass of the second car?

A dog pulls on a pillow with a force of 2.4 N at an angle of 20.1 above the horizontal a) What is the x component of this force? Answer in units of N. b) What is the y component of this force? Answer in units of N.

A laser emits a single, 3.0ms pulse of light that has a frequency of 2.83 1011 Hz and a total power of 65 000 W. How many photons are in the pulse?

Romeo is standing 8m below Juliets window by a rose garden 9m away. How fast will the pepples hit her window?(only in a horizontal component of velocity)
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Sample Questions
 The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
 (a) What is the average angular acceleration of the Earth?
 (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
1. Can you show me step by step how to solve this problem?:
 A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the 1.5m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19kg/m^3. Find the absolute pressure of the helium gas
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?