State the principle of conservation of charge
What will be an ideal response?
The net charge of an isolated system remains constant.
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A horizontal disk rotates about a vertical axis through its center. Point P is midway between the center and the rim of the disk, and point Q is on the rim
If the disk turns with constant angular velocity, which of the following statements about it are true? (There may be more than one correct choice.) A) P and Q have the same linear acceleration. B) Q is moving twice as fast as P. C) The linear acceleration of Q is twice as great as the linear acceleration of P. D) The linear acceleration of P is twice as great as the linear acceleration of Q. E) The angular velocity of Q is twice as great as the angular velocity of P.
Earth exerts a gravitational force of 7000 N on one of the communications satellites. What force does the satellite exert on Earth?
A. more than 7000 N B. 7000 N C. less than 7000 N D. zero
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The quantity mv is
a. the kinetic energy of the crate. b. the potential energy of the crate. c. the linear momentum of the crate. d. the work you do on the crate. e. the power you supply to the crate.
The isobaric compressibility or thermal expansion for a material is
What is the air’s isobaric compressibility at 300K?