An object is moving with constant non-zero velocity on the +x axis. The velocity versus time graph of this object is
A)
a horizontal straight line.
B)
a vertical straight line.
C)
a straight line making an angle with the time axis.
D)
a parabolic curve.
E)
a hyperbolic curve.
A
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Your friend applies a horizontal force to your 2.0-kg physics textbook, which rests stationary against a vertical wall. The static and kinetic friction coefficients between the book and the wall are 0.20 and 0.15, respectively. With what force must your friend push on the book in order that it doesn’t slip down the wall?
A. 39 N B. 20 N C. 19.6 N D. 25 N E. 98 N
Find the speed of an ocean wave whose vertical displacement y as a function of time t is given by y(x,t) = 3.7 cos(2.2x - 5.6t), where all quantities are in SI units
A) 2.5 m/s B) 1.9 m/s C) 3.5 m/s D) 4.5 m/s
Answer the following statement(s) true (T) or false (F)
Alain Aspect’s experiments support the quantum prediction that superluminal connections do exist between measuring devices, connections which in fact violate the special theory of relativity.
The volume of a gas changes from 0.750 m3 to 0.320 m3 at a constant pressure of 1.5 × 10^5 Pa. How much work is done by the gas on its environment?
a. 4.8E+4 J b. –6.5E+4 J c. –4.8E+4 J d. 6.5E+4 J