A melon is projected into the air with 100 J of kinetic energy in the presence of air resistance. When it returns to its initial level its kinetic energy is
A) less than 100 J.
B) more than 100 J.
C) 100 J.
D) need more information
Answer: A
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Capacitance: If the result of your calculations for a quantity has SI units of C2 ? s2/(kg ? m2), that quantity could be
A. an electric potential difference. B. a dielectric constant. C. an electric field strength. D. a capacitance. E. an electric potential energy.
Work-Energy Theorem: How large a net force is required to accelerate a 1600-kg SUV from rest to a speed of 25 m/s in a distance of 200 m?
A. 1600 N B. 0 N C. 200 N D. 400 N E. 2500 N
Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32.0° from the central spot, how many TOTAL number of maxima can be seen?
A) 5 B) 7 C) 10 D) 11 E) 13
A television advertisement claiming that a product is light-years ahead of its time does not make sense because ________
A) light-years can only be used to talk about light B) it doesn't specify the number of light-years C) it uses "light-years" to talk about time, but a light-year is a unit of distance D) a light-year is an astronomically large unit, so a product could not possibly be so advanced