The more massive a white dwarf, the ________
A) higher its temperature B) larger its radius
C) smaller its radius D) higher its luminosity
C
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Meteor add approximately what mass to the Earth each year?
A) a few tons B) millions of tons C) thousands of tons D) tens of thousands of tons
To determine the distance to a Cepheid, we must measure its ________ of pulsation
Fill in the blank(s) with correct word
The nucleus of a hydrogen atom, a proton, sets up an electric field. The distance between the proton and electron is about 5.1 × 10^?11 m. What is the magnitude of the electric field at this distance from the proton? [The charge on the proton is +1.6 × 10^?19 C.]
Earth's radius is 6.38 × 106 m, and it completes one revolution every day. What is the magnitude of the centripetal acceleration of a person standing on the equator?
A) 0.00844 m/s2 B) 0.00343 m/s2 C) 0.0337 m/s2 D) 0.343 m/s2 E) 0.000854 m/s2