Light is shone on a diffraction grating with d=7.25x10^-6 m. The third order (m=3) maximum occurs at an angle of 12.2. What is the wavelength of the light in nanometers?
(Hint: The answer will be between 400 and 700.)

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction