« previous next »

Author Question: A mirror lies flat on a table. A beam of light strikes the mirror with an angle of incidence or 15, ... (Read 111 times)

Capo

  • Hero Member
  • *****
  • Posts: 545
on: Jul 28, 2018
A mirror lies flat on a table. A beam of light strikes the mirror with an angle of incidence or 15, the reflected ray being to the right of the incident beam. The right edge of the mirror is then lifted so that the mirror now makes a 5 angle with the horizontal. What is the resulting angle between the incident beam and the reflected beam?
 a. 25
  c. 35
  b. 20
  d. The angle is not given.

Question 2

A hot (70C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/gC. John drops the metal into a 500-g calorimeter containing 40 g of water at 20C. The calorimeter is constructed of a material that has a specific heat of 0.10 cal/ gC. When equilibrium is reached, what will be the final temperature? (cwater = 1.00 cal/gC.)
 a. 114C
  c. 40C
  b. 72C
  d. 37C


emily12345

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Capo

  • Hero Member
  • *****
  • Posts: 545
Reply #2 on: Jul 28, 2018
Thanks


emily12345

  • Sr. Member
  • ****
  • Posts: 321
Reply #3 on: Jul 28, 2018
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?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Periodic Table Periodic Table
Light-Gathering Power Light-Gathering Power
The biochemical reactions of near-infrared light The biochemical reactions of near-infrared light
Interactions of Light and Matter Interactions of Light and Matter
With the arm placed on the table, apply effleurage over the entire upper limb as a reconnecting and ... With the arm placed on the table, apply effleurage over the entire upper limb as a reconnecting and ...
Major bone (tan) and cartilage (light blue) elements of the human skeleton. Inset shows regions of v Major bone (tan) and cartilage (light blue) elements of the human skeleton. Inset shows regions of v
Video: Electrocardiogram Examination

For a complete list of videos, visit our video library