Which of the terrestrial planets has the most difficult time retaining an atmosphere?

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


A

Physics & Space Science

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Some large clusters of galaxies do not appear to contain enough mass to hold themselves together

Indicate whether the statement is true or false

Physics & Space Science

If a light source is approaching you at a speed very close to the speed of light, it will appear:

A) redder than it is. B) bluer than it is. C) brighter than it is. D) fainter than it is. E) lower temperature than it is.

Physics & Space Science

To find the equivalent resistance of the combination of resistors shown below by the method of possibly repeated applications of combining resistors in series and /or combining resistors in parallel, the first step would be which of the following?



a.
Combine the 6.0 ? and the 7.0 ? in series.

b.
Combine either the 4.0 ? and the 10.0 ? in parallel or the 7.0 ? and the 10.0 ? in parallel first, since either could be the first step with the other the second step.

c.
Combine the 4.0 ? and the 10.0 ? in series.

d.
Combine the 6.0 ?, the 4.0 ?, and the 10.0 ? in series in a single step.

Physics & Space Science

You have three dice and you roll them simultaneously. What is the chance that all three dice will end up with the same value?

1.1/6 2.3/6 3.1/36 4.1/216

Physics & Space Science