People can snorkel down to a depth of roughly one meter. This means that the additional pressure on the air in their lungs is roughly
a. 9 800 N.
b. 9 800 Pa. c. 9 800 ATM.
d. 19 600 N.
e. 19 600 N/m2.
B
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You drop a stone down a well that is 9.5 m deep. How long is it before you hear the splash? The speed of sound in air is 343 m/s and air resistance is negligible
A) 1.2 s B) 1.4 s C) 1.3 s D) 1.6 s E) 1.5 s
A 2.00 kg piece of lead at 40.0°C is placed in a very large quantity of water at 10.0°C, and thermal equilibrium is eventually reached. Calculate the TOTAL change in entropy that occurs during this process
The specific heat of lead is 130 J/(kg?K). A) 6.6 J/K B) 190 J/K C) 1.4 J/K D) 100 J/K E) 6.2 J/K
Which is not a fundamental particle?
A) photon B) nucleus C) lepton D) up quark E) electron
A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity a = 4.50 × 10^-3 / °C. When the filament is hot and glowing, its temperature is seven times room temperature (20 °C). What is the resistance of the filament (in ohms) at room temperature?
a. 234 b. 1 350 c. 2 080 d. 4 530 e. 5 630