A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC. What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?

a. 22 V
b. 19 V
c. 16 V
d. 25 V
e. 12 V


c

Physics & Space Science

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When Mars is located directly behind the Earth with respect to the Sun in its orbit, it is

a. at the midpoint in the sky between east and west at sunset. b. at the midpoint in the sky between east and west at midnight. c. at the midpoint in the sky between east and west at sunrise. d. at the midpoint in the sky between east and west at noon. e. not visible in the night sky.

Physics & Space Science

The image below shows a rock formation nicknamed “the face on Mars” that was taken by the Viking 1 orbiter in 1976. Given the clear resemblance to a face, what is an appropriate scientific reaction to this image?

The image shows an area of Mars's landscape. Several craters and hills are shown. One of the hills shows a clear resemblance to a face due to the pattern of its dark and illuminated parts.

A) Assume it is most likely a coincidental result of light and shadow, and plan higher resolution follow-up observations.
B) Assume that the image is probably evidence of an advanced civilization, and develop plans to attempt radio communication wit the civilization.
C) Conclude that the resemblance to a human face is so clear that it cannot have been made by nature and that this geological feature must have been built by an advanced civilization.
D) Assume that NASA's spacecraft must have been hacked by someone perpetrating a hoax, and therefore ignore the image

Physics & Space Science

In the inner solar system, the largest surface features are found on the largest planets

Indicate whether the statement is true or false

Physics & Space Science

The closest planet to Earth is

a. Mars. b. Venus. c. Mercury. d. Saturn.

Physics & Space Science