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If we make the approximation that the Earth's atmosphere is isothermal, with T=290K, what is the mass of the Earth's atmosphere? What is the ratio of the mass of Earth's atmosphere to the total mass of the Earth?
Dan is gliding on his skateboard at 4.0m/s . He suddenly jumps backward off the skateboard, How fast is Dan going as his feet hit the ground
With what minimum speed must you toss a 170g ball straight up to just touch the 12-m-high roof of the gymnasium, With what speed does the ball hit the ground
An initially neutral conductor contains a hollow cavity in which there is a -100 nC point charge. what is the charge on the inner wall of the cavity wall
The length of a simple pendulum is 0.65 m and the mass of the particle (the "bob") at the end of the cable is 0.26 kg. What is the angular frequency of the motion
A rock is thrown with initial velocity of 10 m/s and falls 50 m from the base of the cliff. how far away from the base of the cliff does the rock land
A 85.1 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. How long does it take the astronaut to reach the ship
A planet orbits a star, in a year of length 4.58 x 107 s, in a nearly circular orbit of radius 2.85 x 1011 m. With respect to the star, determine the angular speed of the planet
When light with a wavelength of 228 nm is incident on a certain metal surface, Determine the wavelength of light that should be used to double the maximum kinetic energy of the electrons ejected from this surface
At a dock, a crane lifts a 2094 kg container 14 m, swings it out over the deck of a freighter, and lowers the container into the hold of the freighter, How much work is done by the crane on the container?
A 0.24 kg blob of clay is thrown at a wall with an initial velocity of 23 m/s. what is the average force experienced by the clay
A mass of 8 kg is resting on a horizontal table with a coefficient of kinetic friction of 0.35. Calculate the linear acceleration of the system
A spring of spring constant k = 340 Nm-1 is used to launch a 1.5-kg block along a horizontal surface by compressing the spring by a distance of 18 cm. how far does the block slide
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