A parallel beam of light of wavelength 450nm is incident normally on a diffraction grating which has 300lines/mm What is the total number of intensity maxima observed?

The number of electorn is morn than proton in nuclie. why?

In a two-coil system, the induced potential difference in the secondary coil depends on

Your electricity bill says 834-kWh of consumption. With this amount of energy, how many 59-W light bulbs can be powered for an average of 7 hours?

The energy obtained by an object when it gains or loses electrons is what?

A cat jumps horizontally from a couch with a speed of 2.2 m/s. if the cat takes 0.3 seconds to land, how far from the couch does the cat land?

Describe how the competition between invasive and native species might affect a food web

Which vector should be negative? any vector whose magnitude is less than 1 a displacement in the direction North any vector whose magnitude is greater than 1 the velocity of a falling object

Acceleration is a scalar quantity true or false

Find a numerical value for rhoearth, the average density of the earth in kilograms per cubic meter. Use 6378km for the radius of the earth, G=6.67*10-11m3 / (kg⋅s2), and a value of g at the surface of 9.80m/s2.

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.