The specific heat capacity of water is about twice the specific heat capacity of ice. From this information, the amount of heat required to boil 1 kg of water is ________ the amount of heat required to melt 1 kg of ice
a. 1/2 c. 2 times
b. equal to d. unrelated to
D
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During the month of June the north celestial pole points towards Polaris, but during the month of December it points
a. just north of Polaris. b. just south of Polaris. c. towards the star Vega. d. towards the star Thuban. e. still towards Polaris.
You conduct the following three ball drops, in each case measuring the time it takes for the ball to fall to the ground; the mass is the mass of the ball and the height is the height from which you drop the ball:
Ball Drop 1. Mass 0.5 kilograms, height 20 meters Ball Drop 2. Mass 5.0 kilograms, height 20 meters Ball Drop 3. Mass 0.5 kilograms, height 30 meters Which pair of ball-drops will best test whether mass affects the acceleration of gravity? A) ball drops 2 and 3 B) ball drops 1 and 3 C) ball drops 1 and 2
The position of an object is given by where and x and t are in SI units. What is the instantaneous acceleration of the object when
A) -13 m/s2 B) 2.9 m/s2 C) 4.6 m/s2 D) 13 m/s2
A thin film appears cyan when illuminated with white light. The color being cancelled by destructive interference is
A) red. B) green. C) white. D) blue. E) none of the above