Uniform Circular Motion: When a car goes around a circular curve on a horizontal road at constant speed, what force causes it to follow the circular path?
A. the normal force from the road
B. the friction force from the road
C. gravity
D. No force causes the car to do this because the car is traveling at constant speed and therefore has no acceleration.
Answer: B
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A) 0.06 hours B) 3.3 hours C) 33 hours D) 40 hours E) slightly more than one month
A radar receiver indicates that a pulse return as an echo in 20 ?s after it was sent. How far away is the reflecting object? (c = 3.0 × 108 m/s)
A) 1.5 km B) 3.0 km C) 6.0 km D) 9.0 km
Addition of a metal slab of thickness a between the plates of a parallel plate capacitor of plate separation d is equivalent to introducing a dielectric with dielectric constant ? between the plates. The value of ? is
A.
.B.
C.
D.
.E.
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