Engineers are designing a curved section of a highway. If the radius of curvature of the curve is at what angle should the curve be banked so that a car traveling at 29.0 m/s will stay on the road without the aid of frictional forces?
A) 23.9°
B) 16.7°
C) 21.0°
D) 26.1°
A
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Much of the charge on a conducting cube is
A) uniformly spread over its surface. B) partly beneath the surface. C) mutually repelled toward its corners. D) none of the above
Almost all of Earth's supply of energy comes from
A) the oceans. B) Earth's interior. C) the Sun. D) carbon dioxide.
Faraday's Law: A closed flat loop conductor with radius 2.0 m is located in a changing uniform magnetic field. If the emf induced in the loop is 2.0 V, what is the rate at which the magnetic field strength is changing if the magnetic field is oriented perpendicular to the plane in which the loop lies?
A. 0.16 T/s B. 1.0 T/s C. 0.080 T/s D. 2.0 T/s
Imagine a steel pipe that doesn't leak from the sides and is already filled with water. Water enters at a rate of 2 kg/s but leaves at a rate of 1 kg/s. Which of the following is true?
A. The water pressure inside the tube rises as water is added B. The water flow must be laminar C. The tube is narrower where the water enters than where it leaves D. It is not possible for this situation to occur