ER. Calcula.
a) (f+g) (3).
b) (f+g+h) (15).​

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?