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A little red wagon with a mass of 4.60 kg moves in a straight line on a frictionless horizontal surface. It has an initial speed of 10.0m/s.
Two reversible heat engines X and Y are arranged in series. The engine X rejected heat directly to Y. Engine X receives 400 KJ of heat at 427 degrees centigrade
Two point charges are arranged along the x axis as shown the figure. At which of the following values of x is the electric potential equal to zero?
Calculate the density of NO2 gas at 0.970 atm and 35 degrees Celsius.
What are the first and second laws of thermodynamics? How do these laws affect ecosystems?
You are supplied with a 1.87% concentration (by weight) hydrogen peroxide solution. Assume the density of your solution is 1.00 g/mL.
A block with a mass m is pulled along a horizontal surface for a distance +x by a constant force F at an angle theta with respect to the horizontal.
Steam enters a turbine with a velocity of 20 ms-1, a pressure of 3 bar, internal energy of 3500 kJ kg-1 and density of 1.7 kg ms-3.
A 230 N sphere 0.20 m in radius rolls, without slipping 6.0 m down a ramp that is inclined at 28° with the horizontal.
Air enters a steady-flow compressor with a specific enthalpy of 293.4 kJ/kg and a velocity of 60m/s, and leaves with a specific enthalpy of 343 kJ/kg
A home builder installs electric baseboard heat and claims, "It is the cheapest and cleanest way to go."
"Energy can be converted to one form or another, but cannot be created or destroyed." This the theory of:
From Introduction to Chemical Engineering Thermodynamics, Smith, Van Ness, & Abbott, Sixth Edition
How much work is required, using an ideal Carnot refrigerator, to change 0.500 kg of tap water at 10.0°C into ice at -20.0°C?
How far would the box have slid if the friction coefficient didn't increase, but instead had the constant value of 0.100?
In moving out of a dormitory at the end of the semester, a student does 1.6 x 10^4 J of work. In the process, his internal energy decreases.
Two equal quantities of water, of mass m and at temperatures T1, and T2, are adiabatically mixed together, the pressure remaining constant
An arrow, starting from rest, leaves the bow with a speed of 25.0 m/s. If the average force exreted on the arrow by the bow were doubled.
Calculate the velocity and the kinetic energy of the hammer/pile combination immediately after impact.
If the person exerted an effort force of 250 newtons to roll the barrel along the ramp, what is the efficiency of the ramp?
What is the work done by the gravitational force when the shot has risen to a height of 2.13 m above the ground.
What is the change in entropy for the following "reactions"? For the purposes of this exercise treat the pennies as if this was about molecules
Does the answer to part b depend on weather the ball is moving up or down at a height of 20m? Please explain.
100 g of ice is melted at 0 degree C, and the resulting water is warmed to room temperature (25 degree C). Calculate delta S (change in entropy)
Suppose we have two blocks composed of 6 harmonic oscillators each and have 3 quanta in each initially.