« previous next »

Author Question: A radar pulse sent out to an airplane at a distance of 20.0 km will return as an echo to the source ... (Read 91 times)

Sportsfan2111

  • Hero Member
  • *****
  • Posts: 585
on: Jul 28, 2018
A radar pulse sent out to an airplane at a distance of 20.0 km will return as an echo to the source in what time interval? (c = 3.00  108 m/s)
 a. 33.3  10-6 s
  c. 66.7  10-6 s
  b. 133  10-6 s
  d. 0.0333  10-6 s

Question 2

A 500-Hz whistle is moved toward a listener at a speed of 10.0 m/s. At the same time, the listener moves at a speed of 20.0 m/s in a direction toward the whistle. What is the apparent frequency heard by the listener? (The speed of sound is 340 m/s.)
 a. 473 Hz
  c. 533 Hz
  b. 485 Hz
  d. 545 Hz


alexisweber49

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Sportsfan2111

  • Hero Member
  • *****
  • Posts: 585
Reply #2 on: Jul 28, 2018
TY


alexisweber49

  • Sr. Member
  • ****
  • Posts: 311
Reply #3 on: Jul 28, 2018
You're welcome


« previous next »
 

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

This squirrel, who was looking for a treat, has become desensitized to humans. The distance between This squirrel, who was looking for a treat, has become desensitized to humans. The distance between
A simulated-color map of the surface of Venus as measured by synthetic aperture radar on the Magella A simulated-color map of the surface of Venus as measured by synthetic aperture radar on the Magella
X-15 Airplane X-15 Airplane
Electrophoresis gel in a densitometer. (a) The green light from the slit light source is visible ... Electrophoresis gel in a densitometer. (a) The green light from the slit light source is visible ...
Place sheet or towel over area to be heated. Use sufficient heat barrier for the heat source used. ... Place sheet or towel over area to be heated. Use sufficient heat barrier for the heat source used. ...
Airplane kids drawing SK Airplane kids drawing SK
Video: Sex-Linked Traits! How are eye colors inherited in fruit flies?

For a complete list of videos, visit our video library