An object moves in a circular path with constant speed v. Which of the following statements is true concerning the object?
1.Its velocity is constant, but its acceleration is changing.
2.Its acceleration is constant, but its velocity is changing.
3.Both its velocity and acceleration are changing.
4.Its velocity and acceleration remain constant.
3
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A dielectric material such as paper is placed between the plates of a capacitor holding a fixed charge. What happens to the electric field between the plates?
A) no change B) becomes stronger C) becomes weaker D) reduces to zero E) cannot be determined without additional information
A coil of 160 turns and area 0.20 m2 is placed with its axis parallel to a magnetic field of 0.40 T. The magnetic field changes from 0.40 T in the x-direction to 0.40 T in the negative x-direction in 2.0 s
If the resistance of the coil is 16 ?, at what rate is power generated in the coil?
A 5.0-kg object is suspended by a string from the ceiling of an elevator that is accelerating downward at a rate of 2.6 m/s2. What is the tension in the string?
a. 49 N b. 36 N c. 62 N d. 13 N e. 52 N
The celestial equator always passes directly overhead
Indicate whether the statement is true or false