Two waves are traveling through a tube. Wave X has an amplitude of 1 cm, and wave Y has twice the amplitude of wave X. The energy of wave Y is A.
four times that of wave X.
B.
two times that of wave X.
C.
one-fourth times that of wave X.
D.
half times that of wave X.

In a load, the load is paralel to the shaft. n a. angular n b. thrust n c radial n d. none of the above

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.