1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?

Law of refraction of light?

When a gear rotates 20 revolutions, it achieves an angular velocity of 30 rad/s, starting from rest. determine its constant angular acceleration in units of rad/s2?

Why do not we observe space quantization for spinning top?

A ball having momentam p hits a ball and its momentam become - p. what is the change in the momentam of the ball?

Which of the following are correct descriptions of heat flow? Check all that apply. A. Conduction is heat flowing when a liquid or gas carries the heat. B. Radiation is heat flowing in waves. C.

A major obstacle to developing good human relations is that

4.) An apartment building is on fire and a guy is trapped on the fire escape ladder. There is a dumpster that is 6.3m away and is filled full of trash, and he is 7m above it.

Calculate the temperature of and power-per-area radiated from a blackbody if the spectral intensity density peaks at (a) gamma rays, λ = 1.50*10-14 m; (b) x rays, 1.50 nm; (c) red light, 640 nm; (d) broadcast television waves, 1.

How has increased energy use associated with scientific advancements affected society? a. It has led to an increase of the concentration of atmospheric carbon dioxide. b. It has led to an increase in hazardous wastes from mining operations. c.

Water is moving with a speed of 5.7 m/s through a pipe with a cross-sectional area of 4.8 cm2. The water gradually descends 9.2 m as the pipe increases to 8.8 cm2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.