A monochromatic light beam with a quantum energy value of 3.0 ev is incident upon a photocell. the work function of the photocell is 1.6 ev. what is the maximum kinetic energy of the ejected electrons?

Which of the following matches a human action with its impact? Construction of bridges : Water pollution Construction of dams : Decrease in carbon dioxide level Use of fertilizers : Increase in population of aquatic plants Decrease in honeybee

If a ball moves along a straight line then it's velocity a) is constant in all cases b) is perpendicular to the straight line c) is along tge straight line d) makes an acute angle with the straight line

The engine of a 2000 kg Mercedes going up Pike's Peak delivers energy to its drive wheel at the rate 100 kW.

Light bends as shown in the illustration due to a change in Intensity Speed Energy Volume Amplitude

Which of the following is a FALSE statement about acceleration?

How are magnet'so magnetic force and magnetic field different

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground? A. A bird sat on a telephone wire. B. A woman moved her child from one place to another in a wagon. C.

What types of mediums are involved in the energy transfer

When two frequencies are added together, the beat frequency and the average frequency are an octave apart?

When sunlight strikes oil on the surface of water, a variety of colors are observed. What is the best explanation for this observation? A) Oil reflects the light and the lens of our eyes break it into component colors.