A year at the south pole consists of 6 months of darkness and 6 months of daylight
Indicate whether the statement is true or false
TRUE
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Europa has few craters because
a. it is protected from impacts by Jupiter's gravity. b. it does not have a solid surface. c. it has erased craters nearly as fast as they have formed. d. its surface is not strong enough to support craters. e. it keeps one face always pointed toward Jupiter which screens it from incoming meteorites.
Light with a wavelength of 310 nm is incident on a metal that has a work function of 3.8 eV. What is the maximum kinetic energy that a photoelectron ejected in this process can have?
A) 0.62 × 10-19 J B) 0.21 × 10-19 J C) 0.36 × 10-19 J D) 0.48 × 10-19 J E) 0.33 × 10-19 J
When does the full Moon phase occur?
A. when the Moon and the Sun are on the Celestial equator B. when the Sun is between Earth and the Moon C. when the Moon is between Earth and the Sun D. when Earth is between the Sun and the Moon
A proton is accelerated from rest through a potential difference of 150 V. It then enters a region of uniform magnetic field and moves in a circular path (radius = 12 cm). What is the magnitude of the magnetic field in this region?
A. 18 mT B. 12 mT C. 15 mT D. 22 mT E. 10 mT