Plane waves of ultrasound, f = 51.0 kHz, impinge on a flat plane with a 1.00 cm-wide slit. What is the total angular width (2q) of diffracted sound waves when the speed of sound in air is 340 m/sec
a. 167°
b. 83.6°
c. 19.5°
d. 41.8°
e. 0.11°
B
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A balloon containing 2.0 m3 of hydrogen gas rises from a location at which the temperature is 22°C and the pressure is 101 kPa to a location where the temperature is -39°C and the pressure is 20 kPa
If the balloon is free to expand so that the pressure of the gas inside is equal to the ambient pressure, what is the new volume of the balloon? A) 4.0 m3 B) 6.0 m3 C) 8.0 m3 D) 10 m3 E) 12 m3
The most concentrated form of energy is
A) wind. B) fossil fuel. C) geothermal. D) nuclear.
You carry a 20 N box 5 m horizontally across a room. The work you do is 100 N-m
Indicate whether the statement is true or false
The huge sheet of galaxies that spans 70 × 200 Mpc is called the ________
Fill in the blank(s) with correct word