« 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 37 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?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Pulse oximetry with the sensor probe applied securely, flush with skin, making sure that both sensor Pulse oximetry with the sensor probe applied securely, flush with skin, making sure that both sensor
Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f
The proportion of obese and extremely obese adults in the United States has increased over the past The proportion of obese and extremely obese adults in the United States has increased over the past
Mobilize neck in wavelike motion. Return the head to a neutral position facing upward. Apply ... Mobilize neck in wavelike motion. Return the head to a neutral position facing upward. Apply ...
Humburger is a good source of niacin , vitamin B6 and pantothenic acid Humburger is a good source of niacin , vitamin B6 and pantothenic acid
Palpating the radial pulse Palpating the radial pulse
Video: Effect of blood chemistry - stimuli, hyperventilation response and hypoventilation response

For a complete list of videos, visit our video library