Questions from College Physics

Q: A sound wave arriving at your ear is transferred to the fluid

A sound wave arriving at your ear is transferred to the fluid in the cochlea. If the intensity in the fluid is 0.80 times that in air and the frequency is the same as for the wave in air, what will be...

Q: (a) In Problem 49, find the beat frequency between

(a) In Problem 49, find the beat frequency between the outgoing and reflected sound waves. (b) Show that the beat frequency is proportional to the speed of the blood cell if v ≪ u. [Hint: Use the bin...

Q: Bats of the Vespertilionidae family detect the distance to an object by

Bats of the Vespertilionidae family detect the distance to an object by timing how long it takes for an emitted signal to reflect off the object and return. Typically they emit sound pulses 3 ms long...

Q: A jetliner flies east for 600.0 km, then turns

A jetliner flies east for 600.0 km, then turns 30.0° toward the south and flies another 300.0 km. (a) How far is the plane from its starting point? (b) In what direction could the jetliner have flown...

Q: A bicycle has wheels of radius 0.32 m. Each

A bicycle has wheels of radius 0.32 m. Each wheel has a rotational inertia of 0.080 kg·m2 about its axle. The total mass of the bicycle including the wheels and the rider is 79 kg. When coasting at co...

Q: The orange jewelweed (Impatiens capensis) has seed pods that explode

The orange jewelweed (Impatiens capensis) has seed pods that explode when lightly touched, launching the seeds as projectiles to disperse them. Suppose a seed is launched at 1.2 m/s from a height of 1...

Q: At 0.0°C and 1.00 atm,

At 0.0°C and 1.00 atm, 1.00 mol of a gas occupies a volume of 0.0224 m3. (a) What is the number density? (b) Estimate the average distance between the molecules. (c) If the gas is nitrogen (N2), th...

Q: Horseshoe bats use the Doppler effect to determine their location. A

Horseshoe bats use the Doppler effect to determine their location. A Horseshoe bat flies toward a wall at a speed of 15 m/s while emitting a sound of frequency 35 kHz. What is the beat frequency betwe...

Q: Sand is composed of SiO2. Find the order of magnitude of

Sand is composed of SiO2. Find the order of magnitude of the number of silicon (Si) atoms in a grain of sand. Approximate the sand grain as a sphere of diameter 0.5 mm and an SiO2 molecule as a sphere...

Q: According to a treasure map, a treasure lies at a depth

According to a treasure map, a treasure lies at a depth of 40.0 fathoms on the ocean floor due east from the lighthouse. The treasure hunters use sonar to find where the depth is 40.0 fathoms as they...