The expression(s) indicating the number of protons in a nucleus is
a. A
b. N
c. Z
d. Z + N
e. A – Z
C
You might also like to view...
The metric prefix for one one-hundredth is
A) milli. B) centi. C) kilo. D) mega. E) giga.
In another solar system, a planet has a moon that is 4.0 × 105 m in diameter. Measurements reveal that this moon takes 3.0 x 105 s to make each orbit of diameter 1.8 × 108 m. What is the mass of the planet? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 3.4 × 1024 kg B) 4.8 × 1024 kg C) 1.2 × 1024 kg D) 1.7 × 1024 kg E) 2.4 × 1024 kg
The sky is blue because
a. of the reflection of the oceans. b. blue is the color of oxygen gas. c. blue is the color of nitrogen gas. d. the blue light in sunlight scatters more than the red light. e. of clouds.
A spring (k = 200 N/m) is suspended with its upper end supported from a ceiling. With the spring hanging in its equilibrium configuration, an object (mass = 2.0 kg) is attached to the lower end and released from rest. What is the speed of the object after it has fallen 4.0 cm?
a. 90 cm/s b. 79 cm/s c. 96 cm/s d. 83 cm/s e. 57 cm/s