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(a) To a closed system we add 28 kJ of heat while its internal energy decreases by 24 kJ. How much work do we gain or perform? (Everything reversible)
(b) If we do not gain/perform work, how much heat is exchanged (internal energy change same as in part (a))?
a 113-kg horizontal platform is a uniform disk of radius 1.75 m and can rotate about the vertical axis through its
Charge and Charge Density Consider the surface ofa conducting sphere of radius 0.12 m who sepotential is 100 V (with V = 0 atinfinity). What is the total charge?
Imagine that we connect a formula36.mml lightbulb and an formula37.mml lightbulb in parallel and connect the set to a 19-V battery
In an EM wave the electric field oscillates 4 X 10^14 HZ at in the North - South direction. In what direction is the magnetic field oscillating
The position of a particle is given in cm by x = (5) cos 5?t, where t is in seconds. Find the maximum acceleration of the particle
A 15.0 mW laser puts out a narrow beam 2.00 mm indiameter. What is the average (rms) value of the electricfield
The air inside a bicycle tire pump has 193 joules of work done on it as 77.3 joules of heat is conducted away from it. What is the change in internal energy of the air
A new plant oil is discovered that is easy to recover from the plant and it might be a useful fuel. A question is the energy density of the fuel. Calculate the energy-density of this "new fuel"
a closed circuit consists of two semicircles of radii 37 and 20 cm that are connected by straight segments. a current
A uniform .20-kN board of length L has two objects hanging from it : 300N at exactly L/3 from one end, What torques are being exerted on the board
What is the magnitude of the auto average acceleration.
A 2.0 kg box of running shoes slides on a horizontal frictionless table and collides with a 1.0 kg box of ballet slippers initially at rest on the edge of the table, at height h = 0.41 m. find their kinetic energy just before they strike the floor
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