This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A radar installation operates at 9 000 MHz with an antenna (dish) that is 15 meters across. ... (Read 73 times)

ETearle

  • Hero Member
  • *****
  • Posts: 580
on: Jul 28, 2018
A radar installation operates at 9 000 MHz with an antenna (dish) that is 15 meters across. Determine the maximum distance (in kilometers) for which this system can distinguish two aircraft 100 meters apart.
 a. 7.4 km
  b. 370 km
  c. 3700 m
  d. 37 km
  e. 740 km

Question 2

A binary star system in the constellation Orion has an angular separation between the two stars of 1.2  10-5 radians. If l = 5  10-7 m, what is the smallest aperture (diameter) telescope that may be used to resolve the two stars?
 a. 10 cm
  b. 5 cm
  c. 50 cm
  d. 1 m
  e. 4 cm


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ynlevi

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

B


ETearle

  • Member
  • Posts: 580
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

ryhom

  • Member
  • Posts: 366
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

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.

Postage meters are used for large mailings. Postage meters are used for large mailings.
Swabbing a Petri dish to spread apart colonies. Bacitracin disk is used to prove the presence or ... Swabbing a Petri dish to spread apart colonies. Bacitracin disk is used to prove the presence or ...
An air ratchet is a very useful tool that allows fast removal and installation of fasteners, ... An air ratchet is a very useful tool that allows fast removal and installation of fasteners, ...
Shoulder Installation Shoulder Installation
A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the ... A certain car traveling at 34.0 mph skids to a stop in 29 meters from the point where the ...
Cuban Steak Dish Cuban Steak Dish
Video: Methods that regulate pH

For a complete list of videos, visit our video library