If you leave your desk, walk 25 meters west down A hall, turn left and head 55 meters south down B hall, turn left again and head 15 meters east down D hall, turn left and head 55 m
north up B hall, turn right and head 10 m east down A hall and return to your seat, what is
the magnitude of your displacement?

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?