3 The Sun emits ultraviolet photons of energy 1.6 x 10" from a relatively thin layer called the chromosphere.
3 (a)
(1) Calculate the wavelength of a photon of this energy.
3 (a) (i) The photons are emitted by atoms of hydrogen gas at a temperature of 15 000 K.
Calculate the mean kinetic energy of an atom of a gas at this temperature.

The functions q and r are defined as follows. q(x)= -2x+2 r(x)= x^2 - 1 find the value of r(q(

If square root x = -7, then x= -49 true or false

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in