A bat flying at 5.00 m/s is chasing an insect flying in the same direction. If the bat emits a 40.0-kHz chirp and receives back an echo at 40.4 kHz, (a) what is the speed of the insect? (b) Will the bat be able to catch the insect? Explain.

Categorize the scenarios according to whether the observer would detect the frequency to be higher, lower, or the same as the actual frequency emitted by the source. Higher Lower Same Answer Bank observer and source moving away from each other source and observer moving towards each other source moving towards stationary observer source moving away from stationary observer source and observer moving to the right with the same velocity stationary source and observer

The Doppler effect can be used to measure flow rates in blood. A sound wave is transmitted into a vein or an artery, where it is reflected off the moving red blood cells and then detected by a receiver. A transmitter uses a frequency of 10.0 MHz, and the blood flow rate is 0.50 m/s. What is the expected frequency shift?

A spaceship is approaching a space station at a speed of 1.60 × 105 m/s. The space station has a beacon that emits green light with a frequency of 5.88 × 1014 Hz.  (a) What is the frequency of the beacon observed on the spaceship? (Express your answer to five significant figures.) (b) What is the change in this frequency?

Ocean waves 1.6 meters apart are moving towards the beach with a speed of 3.2 meters/sec. You are in a small boat heading out (against the waves) at 12.7 meters/sec. With what frequency do you hit the waves?

The work function of a surface is given by 3.3X10-19 J. Find the threshold frequency of the surface. 5X1014 Hz 2.5X1014 Hz 7.5X1014 Hz 5.5X10¹2 Hz

Physicians use an EEG (electroencephalogram) to study electrical oscillations in the human brain. So-called Beta oscillations, whose enhancement has been linked to alcoholism, have a typical frequency of 15 Hz.  What is the wave's velocity at 1.00 sec if its maximum amplitude is 0.500 cm?     2.25 cm/sec 2.25 cm/sec -2.25 cm/sec -2.25 cm/sec 47.0 cm/sec 47.0 cm/sec -47.0 cm/sec

Microwaves travel at the speed of light, 3.00 ✕ 108 m/s. When the frequency of microwaves is 7.00 ✕ 109 Hz, what is their wavelength?  m

Police radars determine speed by measuring the shift of radio waves reflected by a moving vehicle. They do so by determining the beat frequency between the reflected wave and the 10.5 GHz emitted wave. Some units can be calibrated by using a tuning fork; holding a vibrating fork in front of the unit causes the display to register a speed corresponding to the vibration frequency. A tuning fork is labeled “55 mph.” What is the frequency of the tuning fork?

Problem 68