« previous next »

Author Question: If we increase the brightness of violet light shining on a photosensitive surface we also increases ... (Read 58 times)

melina_rosy

  • Hero Member
  • *****
  • Posts: 531
on: Jul 29, 2018
If we increase the brightness of violet light shining on a photosensitive surface we also increases the
 
  A) number of electrons ejected per second.
  B) kinetic energy of the ejected electrons.
  C) threshold frequency.
  D) time lag between the absorption of blue light and ejection of electrons.
  E) none of the above

Question 2

A 400-g piece of metal at 120C is dropped into a cup containing 450 g of water at 15.0C. The final temperature of the system is 40.0C. What is the specific heat of the metal, assuming no heat is exchanged with the surroundings or the cup?
 
  A) 1470 J/(kgK)
  B) 2830 J/(kgK)
  C) 3420 J/(kgK)
  D) 3780 J/(kgK)
  E) 4280 J/(kgK)


carolinefletcherr

  • Sr. Member
  • ****
  • Posts: 313
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Gene duplication increases genetic complexity Gene duplication increases genetic complexity
Trapping of Light by a Black Hole Trapping of Light by a Black Hole
A Model of Surface Dyslexia A Model of Surface Dyslexia
The population of Asia increases rapidly, the demand for food and water is also growing The population of Asia increases rapidly, the demand for food and water is also growing
Variations in the Ocean’s Surface Temperature and Salinity with Latitude Variations in the Ocean’s Surface Temperature and Salinity with Latitude
How high a hill would a 75-kg hiker have to climb to increase her gravitational potential ... How high a hill would a 75-kg hiker have to climb to increase her gravitational potential ...
Video: Methods of carbon dioxide transport - carbaminohemoglobin and bicarbonate ions

For a complete list of videos, visit our video library