At a point 10 m away from a long straight thin wire, the magnetic field due to the wire is 0.10 mT. What current flows through the wire? (?0 = 4? × 10-7 T ? m/
A)
5.0 kA
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A person on a sled coasts down a hill and then goes over a slight rise with speed 2.7 m/s. The top of this rise can be modeled as a circle of radius 4.1 m
The sled and occupant have a combined mass of 110 kg. If the coefficient of kinetic friction between the snow and the sled is 0.10, what friction force is exerted on the sled by the snow as the sled goes over the top of the rise? What will be an ideal response?
Speed can sometimes be negative
Indicate whether the statement is true or false
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.
Of all the forms of electromagnetic radiation, the one with the lowest frequency is
A) gamma rays. B) ultraviolet rays. C) visible light. D) microwaves. E) radio waves.