EXERCISES
The 9th term of an AP is three times the 5th term
(a) Find a relation between a and d
(b) Prove that the 8th term is five times the 4th

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?