What does an electroscope do?
a. Measures the amount and sign of the charge of a given object.
b. Takes on the opposite charge to an object brought in contact with it.
c. Detects if an object is charged.
d. Charges nearby objects.
e. Responds only to negatively charged objects.
c
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A single circular (radius = R) loop of wire is located in the yz plane with its center at the origin. The loop has a clockwise current as seen from the point (+R, 0, 0). The direction of the magnetic field at the point
A.
and at the point (+R, 0, 0) is ?
.B.
and at the point (0, +2R, 0) is ?.C.
and at the point (+R, 0, 0) is +.D.
and at the point (0, +2R, 0) is +.E.
__________ is transferred from a substance if it is exposed to something that has a lower temperature
Fill in the blank(s) with correct word
A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the string is horizontal, the speed of the mass is 8.0 m/s. What is the magnitude of the force of the string on the mass at this position?
a. 16 N b. 17 N c. 21 N d. 11 N e. 25 N
The kinetic friction force that a horizontal surface exerts on a 60.0-kg object is 50.0 N. If the initial speed of the object is 25.0 m/s, what distance will it slide before coming to a stop?
A) 15.0 m B) 30.0 m C) 375 m D) 750 m