A truck weighs twice as much as a car, and is moving at twice the speed of the car. Which statement is true about the truck's kinetic energy (K) compared to that of the car?
A) The truck has 4 times the K of the car.
B) All that can be said is that the truck has more K.
C) The truck has twice the K of the car.
D) The truck has 8 times the K of the car.
E) The truck has times the K of the car.
D
You might also like to view...
Many of the mechanical applications of copper alloys are due to high thermal conductivity and excellent _________resistance.
Fill in the blank(s) with the appropriate word(s).
A conducting sphere contains positive charge distributed uniformly over its surface. Which statements about the potential due to this sphere are true? All potentials are measured relative to infinity. (There may be more than one correct choice.)
A) The potential is lowest, but not zero, at the center of the sphere. B) The potential at the center of the sphere is zero. C) The potential at the center of the sphere is the same as the potential at the surface. D) The potential at the surface is higher than the potential at the center. E) The potential at the center is the same as the potential at infinity.
Express the result of the following calculation to the proper number of significant figures: 50.19 - 7966 × 10-3
What will be an ideal response?
A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the paper. Directed out of the plane of the paper is a magnetic field of 0.06 T. The field out of the paper decreases to 0.02 T in 12 milliseconds
(a) What is the magnitude of the change in magnetic flux enclosed by the coil? (b) What is the average voltage induced in the coil as the flux is changing? (c) If the coil has a resistance of 4.0 ohms, what is the magnitude of the current in the coil?