In the early universe, the electromagnetic and strong nuclear forces were joined together to make the electrostrong force

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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One of the curators at the art museum is tilting a large cylinder backward. At what angle ? will the cylinder of height h and radius r be in unstable equilibrium?

A.

.

B.
.

C.
.

D.
.

E.
.

Physics & Space Science

What is the difference between weather and climate?

A) Weather refers to short-term changes in wind, rain, and temperature; climate refers to the long-term average of weather. B) Weather refers to atmospheric conditions in the troposphere; climate refers to atmospheric conditions in the stratosphere. C) Weather is something that we can control, and climate is not. D) Weather refers to small storms; climate refers to large storms.

Physics & Space Science

A hydrogen atom is excited to the n = 10 stated. It then decays to the n = 4 state by emitting a photon which is detected in a photographic plate

What is the frequency of the detected photon? The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 3.46 × 1014 Hz B) 0.865 × 1014 Hz C) 1.27 × 1014 Hz D) 4.05 × 1014 Hz E) 1.73 × 1014 Hz

Physics & Space Science

A mass of 0.150 kg is attached to a spring with a force constant of 3.58 N/m and undergoes simple harmonic oscillations with an amplitude of 7.50 cm. What is the total mechanical energy of the system?

A) 0.0201 J B) 0.0101 J C) 0.269 J D) 0.134 J E) 0 J

Physics & Space Science