Water flows through a multisectional pipe placed horizontally on the ground. the velocity is 3.0 m/s at the entrance and 2.1 m/s at the exit. what is the pressure difference between these two points? neglect friction.

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

The metric unit of electrical power is the watt volt ampere ohm

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?