A 2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kN. What is the frequency of the fundamental mode?
A)
204 Hz
B)
102 Hz
C)
408 Hz
D)
510 Hz
E)
153 Hz
A
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A 5.0-g lead bullet traveling in 19.0°C air at 300 m/s strikes a flat steel plate and stops. What is the final temperature of the lead bullet? (Assume the bullet retains all heat.) The melting point of lead is 327°C. The specific heat of lead is 0.128 J/g/°C. The heat of fusion of lead is 24.5 J/g
a. 278°C b. 186°C c. 445°C d. 327°C e. 371°C
If the radiation curve for an incandescent lamp filament peaks in the green region, the object would appear
A) red. B) yellow. C) green. D) blue. E) white.
The force that holds charged atoms together is
A. gravitational force. B. electromagnetic force. C. weak interaction. D. strong nuclear forces.
Entropy: An ideal gas undergoes an isothermal expansion. During this process, its entropy
A. decreases. B. remains unchanged. C. increases. D. cannot be predicted from the data given.