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A 54.0-kilogram child starts from rest from the top of a frictionless slide that is 4.6 m. tall. The bottom of the slide is 22.8 cm above the ground.
What is the child's speed at the bottom of the slide?
You are trying to overhear a juicy conversation, but from your distance of 15m. It sounds like only an average whisper of 20 dB. So you decide to move closer to give the conversation a sound level of 60 dB instead. How close must you come.
A 2500 kg satellite is to be launched and put in orbit at 750km above the surface of the earth. What gravitational force will the satellite experience? How fast is the Satellite traveling in orbit?
In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.20 x 106 m/s. Compute the force acting on the electron as it revolves in a circular orbit of radius 5.30 x 10-11 meter
Find the time it takes for a telephone call to go by way of satellite between these cities. Ignore the curvature of the earth.
Derive the equation for the linear acceleration of a falling mass m suspended by a string from the rim of a uniform disk of mass M and radius R that is free to rotate without friction about its principal axis. 2. If the hanging mass is doubled, what ..
questionin everyday life we know that something described as white hot is hotter than something described as red hot.
a 0.10 g honeybee acquires a charge of 23 pc while flying.a. the electric field near the surface of the earth is
A solid uniform marble and a block of ice, each with the same mass, start from rest at the same height above the bottom of a hill and move down it. Find the speed of each of these objects when it reaches the bottom of the hill
A boy of mass 50 kg runs up a hill of vertical height 300 m in 20 minutes. calculate the work he does climbing the hill
Tritium has a half-life of 12.3 y and can also be used to date organic matter. If the activity of tritium is determined to be 3% of the expected activity, what is the age of the sample
A plane is flying southeast at 200 km/h. Suddenly, it encounters wind heading 40 degrees north of east at 35 km/h. What is the planes new velocity
questionan astronaut shipwrecked on a remote planet with unidentified characteristics is on top of a cliff which she
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