What type of galaxy is the Milky Way?
a. Spiral
b. Elliptical
c. Regular
d. Irregular
a
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A block is placed in oscillation on a frictionless horizontal surface attached to a spring that is also attached to a wall. If, when stretched away from equilibrium by 15 cm and released, it oscillates with a period of 0.25s, and if the mass of the block is 15 kg, what force was required to stretch the spring by the initial 15 cm?
A. 230 N B. 450 N C. 710 N D. 360 N E. 1400 N
In composition and density, the asteroids most resemble:
A) comets. B) the Sun. C) jovian moons. D) pieces of terrestrial planets. E) Kuiper Belt objects like Pluto.
If you double the frequency of the light in a laser beam, but keep the number of photons per second in the beam fixed, which of the following statements are correct? (There could be more than one correct choice.)
A) The power in the beam does not change. B) The energy of individual photons doubles. C) The energy of individual photons does not change. D) The intensity of the beam doubles. E) The wavelength of the individual photons doubles.
A series circuit consists of a 0.440-H inductor, a 380.0-? resistor, a 5.70-?F capacitor, and an ac voltage source of amplitude 250V. Find the rms voltage across the capacitor when the circuit operates at resonance
What will be an ideal response?