You hold one end of a solid rod in a fire, and the other end becomes hot. This is an example of __________
Fill in the blank(s) with correct word
heat conduction
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If a = 30 cm, b = 20 cm, q = +2.0 nC, and Q = ?3.0 nC in the figure, what is the potential difference VA ? VB?
a.
+60 V
b.
+72 V
c.
+84 V
d.
+96 V
e.
+48 V
The image formed by a single concave lens
A) is always real. B) is always virtual. C) could be real or virtual, depending on whether the object distance is smaller or greater than the focal length. D) could be real or virtual, but is always real when the object is placed at the focal point. E) is always inverted.
Refrigerator magnets are typically
A) short range. B) long range. C) none of these
A thermally isolated system is made up of a hot piece of aluminum and a cold piece of copper, with the aluminum and the copper in thermal contact. The specific heat capacity of aluminum is more than double that of copper
Which object experiences the greater magnitude gain or loss of heat during the time the system takes to reach thermal equilibrium? A) the aluminum B) the copper C) Neither one; both of them experience the same size gain or loss of heat. D) It is impossible to tell without knowing the masses. E) It is impossible to tell without knowing the volumes.