An ac series circuit consists of a voltage source, an 880-? resistor, and an inductance L
(There is no capacitance in the circuit.) The current amplitude is 0.60 A, and the phase angle between the source voltage and the current has a magnitude of 41°
(a) Does the source voltage lag or lead the current?
(b) What is the voltage amplitude of the source?
(a) The source voltage leads the current.
(b) 700 volts
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Jamal pulls a 150-N sled up a 28.0° slope at constant speed by a force of 120 N. Near the top of the hill he releases the sled. With what acceleration does the sled go down the hill?
a. 1.20 m/s2 c. 2.22 m/s2 b. 1.36 m/s2 d. 2.67 m/s2
The temperature of a quantity of ideal gas in a sealed container is increased from 0°C to 819°C. What happens to the speed of the molecules with average kinetic energy of the gas as a result of this temperature increase?
a. It does not change since this speed is independent of temperature. b. It increases but it is less than double the original speed. c. It doubles. d. It quadruples.
Consider a very small hole in the bottom of a tank that is in diameter and filled with water to a height of Find the speed at which the water exits the tank through the hole
A) 44.1 m/s B) 17.64 m/s C) 4.20 m/s D) 48.3 m/s
Fission and fusion reactions have in common _______
a. absorption of energy in the nuclear reaction b. high temperature requirements c. liberation of neutrons d. loss of mass of products over reactants e. gain in mass of products over reactants.