« previous next »

Author Question: If we increase the brightness of violet light shining on a photosensitive surface we also increases ... (Read 61 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?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

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.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

This is a still image from an animation of ocean surface currents from June 2005 to December 2007 This is a still image from an animation of ocean surface currents from June 2005 to December 2007
Parts of the Hand Used in Palpation; Dorsal Surface Parts of the Hand Used in Palpation; Dorsal Surface
Relations of Skull to Surface features Relations of Skull to Surface features
Parallel Light Rays from Distant Objects Parallel Light Rays from Distant Objects
Migration of Surface Cyclones Relative to Rossby Waves Migration of Surface Cyclones Relative to Rossby Waves
How wide must a narrow slit be if the first diffraction minimum occurs at 12 with laser light ... How wide must a narrow slit be if the first diffraction minimum occurs at 12 with laser light ...
Video: Hormonal feedback loop components

For a complete list of videos, visit our video library