A projectile is fired from ground level on a horizontal plain. If the initial speed of the projectile is now doubled, and we neglect air resistance,
A) its range will be increased by .
B) its range will double.
C) its range will be decreased by a factor of two.
D) its range will quadruple.
E) its range will decrease by a factor of four.
D
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A bullet moving at 244. m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. Assuming a constant acceleration, how long did it take the bullet to stop?
What will be an ideal response?
Single-slit diffraction is characterized by
A) a distance between fringes which is independent of wavelength. B) decreasing angular separation of fringes as the order (m) increases. C) narrowing of diffraction pattern as slit width is reduced. D) rapid decrease in intensity of higher order fringes.
An electron-volt is
A) the charge of one electron. B) the energy of one electron. C) the energy jump between the first and second energy levels of hydrogen. D) an amount of energy much smaller than a joule. E) an amount of energy much larger than a joule.
Planetary rings are found around
A) all of the planets B) the planet Saturn only C) all of the Jovian planets D) all of the terrestrial planets