Other Physics Answers

Ashower head has 10 circular openings, each with radius 2.0 mm. The shower head is connected to a pipe with radius 0.70 cm. if the speed of water in the pipe is 4.0 m/s, what is its

speed as it exits the shower-head openings?

A horizontal pipe 20.0 cm in diameter has a smooth reduction to a pipe 7.00 cm in diameter. If the pressure of the water in the larger pipe is 6.0 x 10 Pa and the pressure in the smaller pipe

s 3.0*10^ 4 Pa , at what rate does water flow through the pipes?

You and your friends are playing in the swimming pool with a 60-cm-diameter beach ball. How much force would be needed to push the ball completely under water?

in a completely inelastic collision between two objects, where the objects stick together after the collision, is it possible for the final kinetic energy of the system to be zero? if so, give an example in which this would occur. If the final kinetic energy is zero, what must the initial momentum of the system be? is the initial kinetic energy of the system zero? explain

a window washer is standing on the sacffold supported by a vertical rope at each end. the sacffold weighs 200N and is 3m long. what is the tension in each rope and when 700Nworker stands 1m from one end

A compound pendulum of mass 0.8 kg and length 1.2 m swings about a pivot point located at one end of the pendulum.

(a) Find its frequency of oscillation.

(b) Find the center of oscillation of the pendulum.

A block-spring system has a kinetic energy of 6 J and the spring has an elastic potential energy of 10 J when the block is at +4 cm. The amplitude of oscillation is 6 cm and the mass of the block is 450 gm.

(a) Find the elastic potential energy of the block and kinetic energy of the system when the block is at the equilibrium position, x = 0.

(b) Determine the velocity when the block is at x = 0.

Determine the force of gravity of the meteorites when it reaches one quarter of its distance from the center of Earth if the force of gravity of a meteorite approaching Earth is 50,000 N.

Determine the force of gravity of a person if the distance is 10 times from Earth's center and when the force of gravity of an average person on Earth's surface is about 700 N.

2. Using the table of constant, solve the friction of a 1,500 kg car if the driver applies the brakes on a concrete road (x), (a) on dry road

(b), on wet road