Most of the chemical properties of atoms depend on
a. the neutrons in the nucleus.
b. the electrons closest to the nucleus.
c. the configuration of outer electrons.
d. the configuration of protons in the nucleus.
e. the attraction of protons to neutrons.
C
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Suppose you're an astronaut being paid according to the time you spend traveling in space. You take a long voyage traveling at a speed near that of light. Upon your return to Earth, you're asked how you'd like to be paid: according to the time elapsed on a clock on Earth or according to your ship's clock. To maximize your paycheck, which should you choose?
1.the Earth clock 2.the ship's clock 3.either clock because it doesn't make a difference
Jack pulls a sled across a level field by exerting a force of 120.0 N at an angle of 30.0° with the ground. What are the parallel and perpendicular components, respectively, of this force with respect to the ground?
a. 208 N, 120 N b. 120 N, 208 N c. 104 N, 60 N d. 60 N, 104 N e. 69 N, 208 N
A test rocket is fired straight up from rest with a net acceleration of 20.0 m/s2. After 4.00 seconds the motor turns off, but the rocket continues to coast upward with no appreciable air resistance. What maximum elevation does the rocket reach?
A) 487 m B) 327 m C) 320 m D) 408 m E) 160 m
A 1938 nickel has a diameter of 21.21 mm, a thickness of 1.95 mm, and weighs 0.04905 N. What is its density?
A) 1.37 × 10-4 kg/m3 B) 1.82 × 103 kg/m3 C) 19.3 × 103 kg/m3 D) 3.63 × 103 kg/m3 E) 7.26 × 103 kg/m3