Defining momentum as ?mv Einstein was able to show

A. that different observers may not agree on the values of velocities or momenta, but they still find that momentum is conserved.
B. that different observers could then obtain the same values of velocities and momenta, and thus show that momentum is conserved.
C. that momentum is not conserved at speeds near light speed.


A. that different observers may not agree on the values of velocities or momenta, but they still find that momentum is conserved.

Physics & Space Science

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How do the densities of the jovian and terrestrial planets compare?

A) Made from the same solar nebula, they are all similar. B) More massive jovians all have high densities, compared to the tiny terrestrials. C) All terrestrials are more dense than any of the jovians. D) The closer a planet lies to the Sun, the less its density. E) No real pattern here; densities vary greatly and are very individual to each world.

Physics & Space Science

In the grapefruit model of the solar system, it would take a few minutes to walk from the Sun to the inner edge of the Kuiper Belt (Pluto)

Indicate whether the statement is true or false

Physics & Space Science

Suppose XL > XC in the figure below and, with both switches open, a piece of iron is slipped into the inductor. During this process, what happens to the brightness of the bulb?

Physics & Space Science

Spherical Mirrors: An object that is 47.5 cm tall forms an image that is 38.6 cm tall and 14.8 cm from a spherical mirror. How far is the object from the mirror?

A. 124 cm B. 47.6 cm C. 18.2 cm D. 12.0 cm

Physics & Space Science