In pair creation, an electron-positron pair is created from
A) a photon. B) a neutron. C) a neutrino. D) a rabbit. E) nothing.
A
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Answer the following statement true (T) or false (F)
What is the difference between a hot Jupiter and a cold Jupiter?
A) Hot Jupiters have fusion reactions; cold Jupiters do not. B) Hot Jupiters orbit close to the parent stars; cold Jupiters do not. C) Hot Jupiters radiate more energy than they receive from their star; cold Jupiters do not. D) Hot Jupiters have observed volcanoes; cold Jupiters do not. E) Hot Jupiters were an exciting discovery; cold Jupiters were not.
A 1.20-kg ball is hanging from the end of a rope. The rope hangs at an angle 25.0° from the vertical when a 15.0 m/s horizontal wind is blowing. If the wind's force on the rope is negligible, what drag force does the wind exert on the ball?
A) 32.3 N B) 24.1 N C) 3.68 N D) 5.48 N E) 11.8 N
The movement of seismic waves through Earth's interior provides evidence of internal layering. The first boundary discovered was between the
A) upper and lower mantle. B) inner and outer core. C) outer core and the mantle. D) mantle and the crust.