TRUE OR FALSE?? 1.Light travels faster in liquid than in air.

2.Optical fiber light has the ability to travel long distances.

3.Light travels more slowly in water and glass materials.

4.Light always travels in a straight line when going through a single medium.

5. Laser is used by doctors in treating ailments in the internal organs such as the eyes. ​

What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?