The amount of gravitational potential energy released as an object falls depends on
A) its mass, the distance it falls, and the acceleration of gravity.
B) its mass and its speed at the time it begins falling.
C) its mass and its speed when it hits the ground.
D) only its mass and the acceleration of gravity.
E) only the acceleration of gravity.
A) its mass, the distance it falls, and the acceleration of gravity.
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A planar loop consisting of four turns of wire, each of which encloses 200 cm2, is oriented perpendicularly to a magnetic field that increases uniformly in magnitude from 10 mT to 25 mT in a time of 5.0 ms. What is the resulting induced current in the coil if the resistance of the coil is 5.0 ??
A. 60 mA B. 12 mA C. 0.24 mA D. 48 mA E. 6.0 mA
A Boeing-737 airliner has a mass of 20 500 kg. The total area of the wings is 105 m2 . What must be the pressure difference between the top and bottom of the wings to keep the airplane up?
a. 1.91E+3 Pa b. 1.99E+1 Pa c. 1.95E+2 Pa d. 1.92E+3 Pa e. 1.81E+3 Pa
Jupiter's mass is about ________ times that of Earth, and its diameter is ________ times Earth's.
A. 300; 10 B. 100; 300 C. 10; 300 D. 30; 10
The activity of a radioactive source is often
measured in a unit called? a) the joule b) the u c) the microgram d) the cpm