A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = -2.3 N/C, Ey = Ez = 0 . If the position and velocity of the particle at t = 0 are given by x = y = z = 0 and vz = 20 m/s, vx = vy = 0, what is the distance from the origin to the particle at t = 2.0 s?
a. 60 m
b. 54 m
c. 69 m
d. 78 m
e. 3.2 m
B
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Constant Acceleration Kinematics: A car is moving with a speed of 32.0 m/s. The driver sees an accident ahead and slams on the brakes, causing the car to slow down with a uniform acceleration of magnitude 3.50 m/s2. How far does the car travel after the driver put on the brakes until it comes to a stop?
A. 4.57 m B. 9.14 m C. 112 m D. 146 m E. 292 m
Which answer below is not a statement of the second law of thermodynamics?
A. Real processes proceed in a preferred direction. B. Energy does not flow spontaneously by heat from a cold to a hot reservoir. C. The entropy of the universe increases in all natural processes. D. In theory, heat engines working in a cycle employ reversible processes. E. You cannot construct a heat engine, operating in a cycle that does nothing but take heat from a reservoir and perform an equal amount of work.
Compared with the voltage input to a transformer, the voltage output can be
A) greater. B) less. C) greater or less.
Newton's First law holds in all reference frames, including inertial reference frames
Indicate whether the statement is true or false