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.

How does a concave lens affect rays of light?

In order to be sure a grinder used in production is operating properly, what feature of the grinder should be checked daily?

What is an example of chemical potential energy in humans?

In a typical lightning strike, 2.0 c flows from cloud to ground in 0.24 ms. what is the current during the strike?

Threshold potential refers to the membrane potential required to: A. initiate an action potential and open voltage-gated sodium ion channels. B. initiate an action potential. C. open voltage-gated sodium ion channels. D.

A 25kg object moves from left to right at a speed of 30km/h. What net force is required to keep this object moving in a straight line at constant speed

Ganymede is one of the many moons of jupiter. it is nearly a sperical in shape. it is larger than the planet mercury and slightly smaller than the planet mars.

Which of the following statements about two carts rolling on a track and experiencing a completely inelastic collision is TRUE? a. The kinetic energy of the system is conserved to good approximation. b.

If element X has 17 protons, how many electrons does it have?

A 2.0-kilogram laboratory cart is sliding across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.