a ball is projected with a certain angle with initial velocity u. it covers horizontal range R. With what initial velocity it must be projected keeping the angle of projection same so its horizontal range becomes 2.25R

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm

Acar is traveling 35 mph on a smooth surface . if a balanced force is applied to the car what happens?