Phil Physiker standing at the edge of a cliff throws one ball straight up and another ball straight down, both with the same speed. Both balls hit the ground at
A) different speeds.
B) the same speed in the same time.
C) the same speed in different times.
D) none of the above
Answer: C
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In a polarized plug, the large slit connects to the hot side and the small slit connects to the neutral, or ground, side
Indicate whether the statement is true or false
In order to cool a cup of hot tea, someone adds some cold milk and then waits 5 minutes. Would the tea have been cooler at the end of the 5-minute period if the person first waited 5 minutes and then added the cold milk? Assume that the temperature of the milk is the same whenever it is to be added
1.No, the tea would be cooler after 5 minutes if the cold milk were added as soon as possible. 2.Yes, the tea would be cooler after 5 minutes if the cold milk were added at the end of the 5-minute period. 3.The final temperature of the tea would be the same in either case. 4.The one that would be cooler depends on the actual temperatures and amounts of the tea and the milk.
Which of the following is farthest from the Sun?
A) Pluto B) Neptune C) an asteroid in the asteroid belt D) a comet in the Kuiper belt E) a comet in the Oort cloud
Light of different colors in a glass prism travel at
A) different speeds. B) the same speed. C) the same speed in prisms and all materials.