Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is
a. radiation.
b. a stream of particles.
c. a wave.
d. heat.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

What are the north and south poles of a solenoid change with?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.