The four fundamental forces that operate in the universe today are
A) strong force, weak force, electromagnetic force, and gravity.
B) strong force, weak force, electric force, and magnetic force.
C) nuclear force, electromagnetic force, gravity, and tidal force.
D) nuclear force, gravity, electric force, and magnetic force.
A) strong force, weak force, electromagnetic force, and gravity.
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A 30-kg girl on friction-free roller blades pushes away a 25-kg boy also on roller blades at 1 m/s. The girl's speed is
A) 0.45 m/s. B) 0.55 m/s. C) 0.83 m/s. D) 1.2 m/s.
It is believed that a giant impact may have taken away some of Mercury's low-density crustal rock and left a small, dense world with a(n) large, dense, and _______________ core
Fill in the blank(s) with correct word
A 17-mm-wide diffraction grating has rulings of 530 lines per millimeter. White light is incident normally on the grating. What is the longest wavelength that forms an intensity maximum in the fifth order?
A) 377 nm B) 352 nm C) 402 nm D) 427 nm E) 452 nm
The condensation sequence suggests that ____________ should condense as solids closest to the Sun
a. hydrogen and helium b. metals and metal oxides c. silicates d. ices of water, methane, and ammonia