An object is moving with constant non-zero velocity on the +x axis. The position 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.
C
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A box is pushed across a horizontal table at constant speed. Of the forces on it, which pair do we know are equal in magnitude because of Newton’s third law?
A. Normal force on the box and the weight of the box. B. Normal force on the box and the normal force on the table by the box. C. The force of kinetic friction on the box and the force applied to the box by the one pushing it. D. None of these are interaction pairs.
A rifle is aimed horizontally at the center of a large target 60 m away. The initial speed of the bullet is 240 m/s. What is the distance from the center of the target to the point where the bullet strikes the target?
A. 48 cm B. 17 cm C. 31 cm D. 69 cm E. 52 cm
Two glass plates, each with an index of refraction of 1.55, are separated by a small distance D. The space between the plates is filled with water (n = 1.33) as shown. What is the minimum thickness of D that will cause the reflected light appear green? Note: The wavelength of green light is 460 nm in vacuum.
Chromatic aberration can be corrected by combining two or more lenses to form a compound lens
Indicate whether the statement is true or false