« previous next »

Author Question: A cup that is 6.0 cm tall is in front of a concave lens. The image of the cup is 2.5 cm tall and 7.5 ... (Read 54 times)

washai

  • Hero Member
  • *****
  • Posts: 523
on: Jul 29, 2018
A cup that is 6.0 cm tall is in front of a concave lens. The image of the cup is 2.5 cm tall and 7.5 cm from the lens. What is the focal length of the lens?
 
  A) -6.0 cm
  B) -7.5 cm
  C) -13 cm
  D) +18 cm
  E) +6.0 cm

Question 2

An 84-kW AM radio station broadcasts at 1000 kHz. How many photons are emitted each second by the transmitting antenna? (h = 6.626  10-34 J  s)
 
  A) 1.3  
  B) 2.9  
  C) 6.3  
  D) 1.4
Physics ¦ Walker ¦ 5th Edition
Buy Test-Bank


Kimmy

  • Sr. Member
  • ****
  • Posts: 342
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

washai

  • Hero Member
  • *****
  • Posts: 523
Reply #2 on: Jul 29, 2018
TY


Kimmy

  • Sr. Member
  • ****
  • Posts: 342
Reply #3 on: Jul 29, 2018
You're welcome


« previous next »
 

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

electron microscope image of a pyralidae moth electron microscope image of a pyralidae moth
Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. ( Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (
front muscle figure front muscle figure
Label the cutbank and point bar on this image. Label the cutbank and point bar on this image.
Image Image
A little part of textbook image A little part of textbook image
Video: Gastrulation: cross section of the frog

For a complete list of videos, visit our video library