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When water freezes, it expands about 9 percent. What would be the pressure increase inside your automobile engine block if the water in there froze? The bulk modulus of ice is 2.0 109 N/m2, and 1 atm = 105 N/m2.
a. 18 atm b. 360 atm c. 1080 atm d. 1800 atm e. 600 atm
The wavelength of light visible to the human eye is on the order of 5 10–7 m. If the speed of light in air is 3 108 m/s, find the frequency of the light-wave.
a. 3 107 Hz b. 4 109 Hz c. 5 1011 Hz d. 6 1014 Hz e. 4 1015 Hz
The velocity of sound in sea water is 1533 m/s. Find the bulk modulus (in N/m2) of sea water if its density is 1.025 103 kg/m3.
a. 2.6 109 b. 2.2 109 c. 2.0 109 d. 2.4 109 e. 2.8 109
Determine the heat capacity (in calories/°C) of a lake containing one million gallons (approximately 4 million kilograms) of water at 15°C.
a. 4 106 b. 4 109 c. 4 103 d. 1 103 e. 4 102
A coil is wrapped with 300 turns of wire on the perimeter of a circular frame (radius = 8.0 cm). Each turn has the same area, equal to that of the frame. A uniform magnetic field is turned on perpendicular to the plane of the coil. This field changes at a constant rate from 20 to 80 mT in a time of 20 ms. What is the magnitude of the induced emf in the coil at the instant the magnetic field has a magnitude of 50 mT?
What is the inductance of a series RL circuit in which R = 1.0 K if the current increases to one-third of its final value in 30 µs?
a. 74 mH b. 99 mH c. 49 mH d. 62 mH e. None of the above
A concave mirror has a focal length of 20 cm. What is the position (in cm) of the resulting image if the image is inverted and four times smaller than the object?
a. 15 b. 25 c. 50 d. 100 e. –15
Two slits separated by 0.050 mm are illuminated with green light ( = 540 nm). How many bands of bright lines are there between the central maximum and the 12-cm position? (The distance between the double slits and the screen is 1.0 m).
a. 1111 b. 111 c. 11 d. 1 e. 11111
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