An electroscope is charged by induction using a glass rod that has been made positive by rubbing it with silk. The electroscope leaves:
A) gain electrons
B) gain protons
C) lose electrons
D) lose protons
E) gain an equal number of protons and electrons
A) gain electrons
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Blackbody radiation is caused by an object's ____
a. chemical structure b. binding energy c. excitation level d. absolute zero e. thermal agitation
Conservation of Momentum: A 14-cm diameter champagne bottle rests on its side on top of a frictionless horizontal table. Suddenly, the cork pops and the bottle slides backward, covering a distance of 22.0 cm in 0.44 s. If the mass of the bottle is 500 times the mass of the cork, find the distance from the original position that the cork will land on the table. Neglect air resistance and assume that the cork is very small compared to the bottle.
A. 3000 cm B. 60 m C. 85 m D. 8.5 cm
Light spreads out when it passes through a narrow slit because of interference
a. True b. False Indicate whether the statement is true or false
A flat coil is wrapped with 200 turns of very thin wire on a square frame with sides 18 cm long
A uniform magnetic field is applied perpendicular to the plane of the coil. If the field changes uniformly from 0.50 T to 0.00 T in 8.0 s, find the emf induced in the coil. A) 2.1 mV B) 4.1 mV C) 0.21 V D) 0.41 V