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Suppose a satellite is in a circular orbit 5.175 Earth radii above the surface of the Earth (6.175 Earth radii from the center of the Earth). By how much does it have to increase its speed in order to be able to escape Earth?
question1an average human body might be considered to have a black surface of area 10m2 and surface temperature is
suppose that they have same internal energy, which will have a higher temperature: a metal knife in thermal equilibrim with a hot griddle or a 1kg block of ice at -25C or seven 12g ice cubes at -25C.
A small rock with mass 0.12 is fastened to a massless string with length 0.80 to form a pendulum, find the tension in the string as it passes through the vertical
How long will it take until the sun has used up all the hydrogen atoms in the core (the central 10%)? That is, what is the main-sequence lifetime of the sun and compare the lifetime of the sun to the current age.
The rotating sprocket tip at the end of the guide bar has a radius of 0.0343 m. Find the angular speed of the sprocket tip
An ultrasonic transducer, of the type used in medical ultrasound imaging, is a very thin disk (m=0.10g ) driven back and forth in SHM at 1.0 MHz by an electromagnetic coil, What is the maximum oscillation amplitude that won't rupture the disk
Eight books, each 3.90 cm thick with mass 1.70 kg, lie flat on a table. How much work is required to stack them on top of each other.
A solid sphere rolls without slipping or sliding along a horizontal surface toward an incline. Calculate the kinetic energy of sphere as it rolls along the horizontal surface
If in Joule's paddlewheel experiment a block of mass 10 kg is allowed to fall through 22.5 meters and the mass of the water is 50 grams
The rotor (flywheel) of a toy gyroscope has mass 0.140 kg. Its moment of inertia about its axis is The mass of the frame is 0.0250 kg. Find the upward force exerted by the pivot
What is Tension in the chain at the point where the chain is attached to the block? What is the tension of the chain midway up the chain? And find out the tension in the chain at the point where the chain is attached to the ceiling.
A uniform plank of length 5.8 m and weight 217N rests horizontally on two supports, with 1.1m of the plank hanging over the right support. To what distance x can a person who weighs 460 N walk on the overhanging part of the plank before it just beg..
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