How do velocity and acceleration differ?
a. They are the same thing.
b. Velocity has direction but acceleration does not.
c. Acceleration is the rate of change of velocity, while velocity is the rate of change of displacement.
d. Average acceleration can be measured but average velocity cannot.
e. Velocity is the rate at which acceleration changes.
c
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A nearsighted person has a far point of 33 cm. What focal length contact lens would allow her to see in the distance?
A. 33 cm B. -33 cm C. 67 cm D. -67 cm E. 3.0 m
Which graph shows an object moving with a constant non-zero acceleration (note the vertical axes differ)?
GRAPH A
GRAPH B
GRAPH C
Why should isotherms and heat flow lines be orthogonal or perpendicular to each other?
What will be an ideal response?
Length Contraction: The figure shows a right-angled construction frame ABC. When measured at rest, it has dimensions as follows: AB = 18.9 m, AC = 10.0 m, and BC = 16.0 m. This frame is now given a new velocity of 0.420c, relative to Earth, in a direction parallel to AC. How long is part BC of this frame with the new velocity as measured by Earth-based engineers?
A. 16.0 m B. 14.0 m C. 12.0 m D. 10.0 m E. 18.0 m