This type of drawing is given to the Master Electrician from the Lighting Designer and shows where lighting instruments are hung; at what angle and what color gel should be used for each instrument?

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

Rohit is trying to tune an instrument

Which notation is used to represent an alpha particle? a. b. c. d.