Find the speed of the rock just before it lands
An astronaut on Venus drops a rock straight downward from a height of 1.10 m. If the acceleration of gravity on Venus is 8.93 m/s2, what is the speed of the rock just before it lands?
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The conductor on the stationary train hears a 3.5 Hz beat frequency when the other train approaches. What is the speed of the moving train?
A uniform magnetic field of magnitude B=1.2 teslas is directed toward the bottom of the page in the -y direction.Â Â At time t=0, a proton p in the field is moving in the plane of the page with a speed v=4 x 10^7 meters per second in a
You are a passenger on a spacecraft. For your comfort, the interior contains air just like that at the surface of the Earth. The craft is coasting through a very empty region of space. That is, a nearly perfect vacuum exists just outside the wall.
Light with a wavelength of 633 nm illuminates a single slit and a diffraction pattern of light is viewed on a screen that is 1.50 m behind the hole. The distance between the m = 1 and m = 2 minima in the pattern is 4.75 mm. Find the slit width.
Hubble's constant is about 22 km/s/million light-years, implying an age of about 14 billion years for the universe. If Hubble's constant were 11 km/s/million light-years, the age of the universe would be about _______.
When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.23 m. Calculate the speed ( in m/s)at which the ball leaves the spring.
Gravitational potential energy of a mass m a height h above but close to the surface of the earth is said to be given by the expression ΔPE=mgh. Show that for heights much smaller than the radius of the earth (h« Rearth), that ΔP
A 2.4 kg iron ball is dropped from a height of 14 m onto a concrete roadway, and 2.5% of its kinetic energy at the time it reaches the ground is transformed into internal energy in the ball itself. (The rest of the energy is transmitted to the gro
A paratrooper is initially falling downward at a speed of 33.0 m/s before her parachute opens. How far does the paratrooper fall during this time interval
A speed of 0.045 m/s in the same direction. After the collision, glider A continues in the same direction at 0.035 m/s. What is the speed of glider B?
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