How much heat, in joules, is required to convert 1.00 kg of ice at 0°C into steam at 100°C? (Lice = 333 J/g; Lsteam = 2.26 × 10^3 J/g.)
a. 3.35 × 10^5
b. 4.19 × 10^5
c. 2.36 × 10^6
d. 2.69 × 10^6
e. 3.01 × 10^6
e
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Venus has an unusual rotation rate because
a. it is very slow. b. it is very slow and retrograde. c. its obliquity is 90 degrees. d. it is very fast. e. it is very fast and retrograde.
A girl lifts a ball by means of a string attached to the ball. The string exerts a 20 newton force on the ball. The ball weighs 8 newtons. The net force on the ball is
A) zero. B) 28 newtons. C) 12 newtons. D) 20 newtons. E) 8 newtons.
A body is oscillating up and down at the end of a spring. Let's consider when the body is at the top of its up-and-down motion.The net force on the body
a. is zero. b. has its largest magnitude. c. points up. d. points down.
When a metal is illuminated by light, photoelectrons are observed provided that the wavelength of the light is less than 520 nm. What is the metal's work function? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 2.4 eV B) 2.6 eV C) 2.8 eV D) 3.0 eV