Which is larger, a newton or a pound?
a. a newton
b. a pound
c. This question is nonsense—they don't measure the same physical quantity.
d. They are the same size.
B
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A well-known structure located in Britain and investigated by archeoastronomist is called _______________
Fill in the blank(s) with correct word
When we say that the electromagnetic and weak forces "freeze out" from the electroweak force at 10-10 seconds after the Big Bang, what do we mean?
A) These forces are important only at temperatures below the freezing point of water–a temperature that the universe reached at an age of about 10-10 seconds. B) "Freezing out" was a term coined by particle physicists who think that the Big Bang theory is really cool. C) Prior to this time, the electromagnetic and weak forces could not be distinguished from each other, but they possessed separate identities following this time. D) Following this time, neither the electromagnetic nor the weak force was ever important in the universe again. E) Following this time, the electromagnetic and weak forces starting cooling the universe, which is why it is so cold today.
A brass rod of length L 5 0.75 m is twisted by torques T until the angle of rotation between the ends of the rod is 3.58. The allowable shear strain in the copper is 0.0005 rad. The maximum permissible diameter of the rod is approximately:
(A) 6.5 mm
(B) 8.6 mm
(C) 9.7 mm
(D) 12.3 mm
Our bodies, at 37.°C, emit radiation which peaks at what wavelength?
What will be an ideal response?