What r semiconductors?

If you had only one match, and entered a dark room containing an oil lamp, some newspaper, and some kindling wood, which would you light first?

A ball is kicked with an initial velocity of 17 m/s in the horizontal direction and 13 m/s in the vertical direction. (Assume the ball is kicked from the ground.) (a) At what speed (in m/s) does the ball hit the ground

If a rock were dropped from a building it would hit the ground with a certain kinetic energy and velocity. If it fell from a roof 25 times as tall, how would its speed of impact compare? You must show work to receive credit.

Self Esteem is a way of thinking, feeling and acting that implies you- a) Accept others. b) Believe in yourself. c) Believe others. d) All of the above.

Which of the fluids below would produce the highest pressure at the bottom of a tank for the same fluid depth? a. mercury b. air c. water d. helium?

If the abosolute of a gas is 600 k, the temperature in degrees Celsius is

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.

Which of the following is an example of convection? A. hot air rising and cooler air falling B. a hot object transferring heat to a cooler one C. a hot oven warming the air around it D. the rays of the Sun warming the earth

A 50,000 kg locomotive is traveling at 10 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? Assume the track is level.

A rectangular loop of wire with sides 0.262 and 0.401 m lies in a plane perpendicular to a constant magnetic field (see part a of the drawing). The magnetic field has a magnitude of 0.