What is a device made by joining two different materials to form a circuit that produces an electric current?

a. convertor

b. resistor

c. semiconductor

d. thermocouple

A liquid is cooled if a. evaporation exceeds condensation. b. condensation exceeds evaporation. c. evaporation and condensation proceed at equal rates. d. condensation occurs at twice the rate of evaporation

Calculate how far a ball will travel horizontally if the ball reaches a high of 1.5 m above the ground and is thrown at a horizontal velocity of 45.0 m/s.

Select the true statement regarding Amplitude Modulation (AM). a. An increase in message amplitude, Am, results in a higher AM Index, µAM. b. An increase in message amplitude, Am, results in an increase in occupied frequency bandwidth. c.

Two car horns are sounded creating two sound waves with frequencies that differ by a factor of three. How does the speed of the higher frequency sound wave compare to the lower frequency sound wave?

How was the gravitational force related to the distance between two objects

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

The hinge at A and cable BDC support beam ABC. Cable BDC passes over the pulley D that is pinned to the ceiling. (Assume that the + x-axis is to the right and the + y-axis is up along the page.

The "zone of avoidance" a) Accounts for the absence of any planet between the orbits of Mars and Jupiter Prevents collisions between planets in the Solar System.

Electric current is ...