A certain very bright star has an effective surface temperature of 20 000 K. Assuming that it radiates as a blackbody, what is the wavelength at which () is maximum?

What should the operator of powerboat a do if powerboat b begins to cross on the starboard (right side?

Why does copernicus accuse ptolemy of logical inconsistency?

The energy generated by the sun travels to Earth as electromagnetic waves. Because the radiation from the sun travels to Earth in varying wavelengths, scientists consider them to be a spectrum.

How many LEDs must be combined into one light source to give a total of 3.8 W of visible-light output (comparable to the light output of a 100 W incandescent bulb) ?

A violin string vibrates at 441 hz when unfingered. at what frequency will it vibrate if it is fingered one-third of the way down? (only two thirds of the string vibrates.)

Could a nucleus that has one proton but no neutrons exist?

Which physical quantities has the unit kg·m·s-1?

Can an object travel at the speed of light? Why or why not?

Determine the amount of potential energy of a 5 Newton's book that is moved to three different shelves on a bookcase. The height of the shelves is 1.0 meter, 1.5 meter, and 2.0 meter

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron