Two motors in a factory are running at slightly different rates. One runs at 825.0 rpm and the other at You hear the sound intensity increase and then decrease periodically due to wave interference
How long does it take between successive instances of the sound intensity increasing?
A) 1.79 s B) 1.43 s C) 1.54 s D) 1.66 s
C
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Ideal Gas Law: On a cold day, you take in 4.2 L of air into your lungs at a temperature of 0°C. If you hold your breath until the temperature of the air in your lungs reaches 37°C, what is the volume of the air in your lungs at that point, assuming the pressure does not change?
A. 4.2 L B. 4.4 L C. 4.6 L D. 4.8 L E. 5.0 L
Which of the following is not a derived quantity?
a. Volume b. Speed c. Mass d. Density
The two stars in a binary star system have an angular separation of 1.0 × 10-5 rad
If the wavelength of the light from the system is 500 nm, what is the smallest diameter aperture telescope that could just resolve this system to show that it contains two stars? A) 0.50 cm B) 0.61 cm C) 5.0 cm D) 6.1 cm
A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current. The current results because
a. the coil acts like a transformer b. the changing magnetic field induces an electric field in the wire c. an electromagnetic wave is generated d. the wire is ferromagnetic e. none of the above