Questions from College Physics

Q: The deepest place in the ocean is the Marianas Trench in the

The deepest place in the ocean is the Marianas Trench in the western Pacific Ocean, which is over 11.0 km deep. On January 23, 1960, the research sub Trieste went to a depth of 10.915 km, nearly to th...

Q: A source and an observer are each traveling at 0.50

A source and an observer are each traveling at 0.50 times the speed of sound. The source emits sound waves at 1.0 kHz. Find the observed frequency if (a) the source and observer are moving toward eac...

Q: A 62 kg woman takes 6.0 s to run up

A 62 kg woman takes 6.0 s to run up a flight of stairs. The landing at the top of the stairs is 5.0 m above her starting place. (a) What is the woman’s average power output while she is running? (b)...

Q: The pressure in a water pipe in the basement of an apartment

The pressure in a water pipe in the basement of an apartment house is 4.10 × 105 Pa, but on the seventh floor it is only 1.85 × 105 Pa. What is the height between the basement and the seventh floor? A...

Q: Blood flow rates can be found by measuring the Doppler shift in

Blood flow rates can be found by measuring the Doppler shift in frequency of ultrasound reflected by red blood cells (known as angiodynography). If the speed of the red blood cells is v, the speed of...

Q: The body of a 90.0 kg person contains 0.

The body of a 90.0 kg person contains 0.020 m3 of body fat. If the density of fat is 890 kg/m3, what percentage of the person’s body weight is composed of fat?

Q: The pitch of the sound from a race car engine drops the

The pitch of the sound from a race car engine drops the musical interval of a fourth when it passes the spectators. This means the frequency of the sound after passing is 0.75 times what it was before...

Q: Near sea level, how high a hill must you ascend for

Near sea level, how high a hill must you ascend for the reading of a barometer you are carrying to drop by 10 mmHg? Assume the temperature remains at 20°C as you climb. The reading of a barometer on a...

Q: A ship is lost in a dense fog in a Norwegian fjord

A ship is lost in a dense fog in a Norwegian fjord that is 1.80 km wide. The air temperature is 5.0°C. The captain fires a pistol and hears the first echo after 4.0 s. (a) How far from one side of th...

Q: If you watch water falling from a faucet, you will notice

If you watch water falling from a faucet, you will notice that the flow decreases in radius as the water falls. This can be explained by the equation of continuity, since the cross-sectional area of t...