The density of the cosmos at the end of the lepton epoch was comparable to iron, about ten times denser than water

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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A steady diet of inflowing gas, dust, and an occasional star would keep the supermassive black hole in an active galactic nucleus (AGN) active

Indicate whether the statement is true or false

Physics & Space Science

Find the frequencies of the first three harmonics of a 1.0-m long string which has a mass per unit length of 2.0 × 10^-3 kg/m and a tension of 80 N when both ends are fixed in place

Physics & Space Science

The pressure of an ideal gas is doubled during a process in which the energy given up as heat by the gas equals the work done on the gas. As a result, the volume is:

A. doubled B. halved C. unchanged D. need more information to answer E. nonsense; the process is impossible

Physics & Space Science

A cannon recoils while firing a cannonball. The speed of the cannon's recoil is relatively small because the

A) force against the cannon is smaller than against the ball. B) momentum is mainly concentrated in the cannonball. C) cannon has much more mass than the cannonball. D) momentum of the cannon is smaller.

Physics & Space Science