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Solve the given problems
Problem I: What is the coefficient of performance of an ideal heat pump that extracts heat from 7.0oC air outside and deposits heat inside a house at 22oC?
Problem II: If this heat pump operates on 1100 W of electrical power, what is the maximum heat it can deliver into the house each hour?
Show the process and each step.
An outside loudspeaker (considered a small source) emits sound waves with a power output of 120 W. Find the intensity level in decibels at that distance
A hoop (I = MR^2) of mass 2.0 kg and radius 0.50 m is rolling at a center-of-mass speed of 15 m/s. What is the new speed of the center of mass of the hoop?
A car starts from rest and travels for 10.0 s with a uniform acceleration of +3.0 m/s2. How far has the car gone
A cannon ball was fired at a wall that was 300 m away. The ball was fired from an incline of 40 degrees what timewill it take for the ball to hit the wall when the initial velocityof the cannon ball was 68 m/s. At what height did the ball hit the ..
the nuclei of the hydrogen and chlorine atoms in an hcl molecule are 0.13 nanometer nm apart. how far from the nucleus
it takes 7500 J of work to slide a crate a distance of 15 m across a floor. A force of 650 N was applied to the rope. what angle did the rope make with the ground
Imagine you have a meter stick whose mass is 250 gram and whose center of gravity is exactly at 50 centimeter. Find what force is required to be exerted at the 90 centimeter mark to have the system in equilibrium
A 200-N beam is held horizontally by a vertical steel cable at each end. The beam is 18 m long. A 650-N box sits 3.0 m from the left end. What is the tension in the right cable
A rifle is aimed horizontally at a target 50.0 m away, What was the bullet's flight time and What was the bullet's speed as it left the barrel
birds resting on high-voltage power lines are a common sight. the copper wire on which a bird stands is 2.5 cm in
three capacitors of capacitance 6 6 and 4 microf respectively are connected in series to a 2 v battery. what is the
A Gas of diatomic molecules is in equilibrium at a temperature of 340K. what is the rms angular speed of the molocules
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