Questions from College Physics

Q: The wavelength of the fundamental standing wave on a cello string depends

The wavelength of the fundamental standing wave on a cello string depends on which of these quantities: length of the string, mass per unit length of the string, or tension? The wavelength of the soun...

Q: Draw a circuit diagram for automobile headlights, connecting two separate bulbs

Draw a circuit diagram for automobile headlights, connecting two separate bulbs and a switch to a single battery so that: (1) one switch turns both bulbs on and off and (2) one bulb still lights up e...

Q: A dc motor has coils with a resistance of 16 Ω and

A dc motor has coils with a resistance of 16 Ω and is connected to an emf of 120.0 V. When the motor operates at full speed, the back emf is 72 V. (a) What is the current in the motor when it first s...

Q: Consider the following equations for traveling waves on two different strings:

Consider the following equations for traveling waves on two different strings: I. y(x, t) = (1.50 cm) sin [(4.00 cm−1)x + (6.00 s−1)t] II. y(x, t) = (4.50 cm) sin [(3.00 cm−1)x − (3.00 s−1)t] (a) Whic...

Q: If the length of a guitar string is decreased while the tension

If the length of a guitar string is decreased while the tension remains constant, what happens to each of these quantities? (a) the wavelength of the fundamental, (b) the frequency of the fundamenta...

Q: Why is it possible to understand the words spoken by two people

Why is it possible to understand the words spoken by two people at the same time?

Q: Akiko rides her bike toward a brick wall with a speed of

Akiko rides her bike toward a brick wall with a speed of 7.00 m/s while blowing a whistle that is emitting sound with a frequency of 512.0 Hz. (a) What is the frequency of the sound that is reflected...

Q: A cello player can change the frequency of the sound produced by

A cello player can change the frequency of the sound produced by her instrument by (a) increasing the tension in the string, (b) pressing her finger on the string at different places along the finge...

Q: A hair dryer has a power rating of 1200 W at 120

A hair dryer has a power rating of 1200 W at 120 V rms. Assume the hair dryer circuit contains only resistance. (a) What is the resistance of the heating element? (b) What is the rms current drawn by...

Q: Consider the tibia (shinbone) for a person of weight 750

Consider the tibia (shinbone) for a person of weight 750 N standing on the ball of one foot as in the following figure. The ankle joint pushes upward on the bottom of the tibia with a force of 2800 N,...