Which color in the right image represents the highest temperatures?
A) blue
B) green
C) orange
D) red
E) white
C) orange
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Usually one can touch the terminals of a battery (e.g., 1.5 volts) with no dire consequences
Why do hospital intensive care rooms go to great effort and expense to attach "ground wires" to equipment in order to guard against the presence of low potentials? (i.e., why are low voltages hazardous in hospitals?)
If you were to cut a small permanent bar magnet in half,
A) neither piece would be magnetic. B) one piece would be a magnetic north pole and the other piece would be a south pole. C) each piece would in itself be a smaller bar magnet with both north and south poles. D) None of these statements is true.
Electrons with greater potential energies relative to the atomic nucleus are
A) inner electrons. B) outer electrons. C) both the same
A thin uniform rod (length = 1.2 m, mass = 2.0 kg) is pivoted about a horizontal, frictionless pin through one end of the rod. (The rotational inertia of the rod about this axis is ML2/3.) The rod is released when it makes an angle of 37° with the horizontal. What is the angular acceleration of the rod at the instant it is released?
a. 9.8 rad/s2 b. 7.4 rad/s2 c. 8.4 rad/s2 d. 5.9 rad/s2 e. 6.5 rad/s2