The specific heat capacity of copper is three times the specific heat capacity of lead. Equal masses of copper and lead are heated from room temperature to the temperature of boiling water. To achieve this, the amount of heat added to the copper is __________ times the amount of heat added to the lead
Fill in the blank(s) with correct word
three
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Indicate whether the statement is true or false
Why is it believed that large parts of the United States were once covered by shallow seas?
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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) 0.41 V C) 4.1 mV D) 0.21 V
How can we tell that some stars are relatively close to us in the sky?
a. Some stars are occasionally eclipsed by the Moon, so they must be nearby. b. Some stars vary in brightness caused by sunspots we can see because they are so close. c. Some stars appear to be extremely bright and must therefore be very close to us. d. Some stars appear to move periodically back and forth against the background stars because of Earth's movement around the Sun.