Imagine that you are pulling your little sister on a sled and that the sled is speeding up. The diagram shown here is the free-body diagram for the sled. The net force on the sled in the vertical (up/down) direction is _________, but the net force in the horizontal direction is _________
a. zero/zero
b. zero/pointing to the right
c. zero/pointing to the left
d. pointing upward/zero
e. pointing downward/zero
b
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A certain bulb with a resistance of 95 ohms and labeled "150 W" is designated for use in a
A) 120-V circuit. B) 240-V circuit. C) either D) not enough information
The weight of a body on the moon is _______________ the weight of the same body on earth
Fill in the blank(s) with correct word
Are cosmic rays electromagnetic waves? Why or why not?
What will be an ideal response?
When it comes near a heavy nucleus, a gamma ray, which is a high energy photon, can "disappear," and in its place there will be produced an electron and a positron, which both have mass. According to special relativity, this pair production is an example of __________
Fill in the blank(s) with correct word