Physics Answers

You own a restaurant that is investigating new ways to deliver beverages to customers. One

proposal is for a tube that will deliver root beer of density 1,090 kg/ m3

throughout the

restaurant. A section of the tube is shown below. The blueprints say that the speed and gauge

pressure of the root beer at point 1 are 3.00 m/s and 12,300 Pa respectively. The root beer at

point 2 is 1.20 m higher than the fluid at point 1 and is traveling at a speed of 0.750 m/s. You

can't make out the number on the blueprints for the pressure of the root beer at point 2. Use

Bernoulli's equation to figure out the gauge pressure of the root beer at point 2.

How many particles are present in a closed container if the energy it contains is 95577.88J, and the diatomic oxygen gas is moving at a velocity of 51.28m/s?

The linear density of a thin rod is given by p =cx, where c is a constant and x is the distance

measured from one end. If the rod is of length b, find the center of mass.

A uniform solid ball has a few turns of light string wound around it. If the end of the string

is held steady and the ball is allowed to fall under gravity,what is the acceleration of the

center of the ball? (Assume the string remains vertical.)

Ball A, with a mass of 1000 g moving in a constant velocity of 30 m/s, hits Ball B with a mass of 4000 g which is at rest. As a result of the collision, Ball A bounced back at 22 m/s. determine the final velocity of Ball B.

A 1305 kg test car travels around a flat circular track that is 2.15 km long (circumference). If the coefficient of friction between the car’s tires and the track is 1.20 will the car be able to drive a speed of 55.7 m/s and stay on the track?

two forces of magnitude 4N and 2.5N acting at a point inclined at an angle of 40 degree to each other find their resultant

What power of spectacle lens is needed to allow a farsighted person, whose near point is 1.00 m, to see an object clearly that is 25.0 cm away? Assume the

spectacle (corrective) lens is held 1.50 cm away from the eye by eyeglass frames.

The emf induced in the armature of a shunt generator is 596 V. The armature

resistance is 0.1Ω

(a) Compute the terminal voltage when the armature current is 460A.

(b) The field resistance is 110Ω. Determine the field current, and the current and power delivered to the external circuit

A shunt motor armature resistance 0.08Ω is connected to 120V mains. With 50A in the armature, what are the back emf and the mechanical power developed within the armature?