1 poir 4) A ray of light passes from a medium X to another
medium Y. No Bending/refraction of light occurs if the
ray of light hits the boundary of medium Y at an angle
of:
(a) 120°
(b) 90°
(c) 45°
(d) 0°

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

Aparticle moves in a circle 1.50 m in radius . through what angle in radians does it rotate if it moves through an arc length of 2.50m? what is the angle in degrees?

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.