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A gas is compressed inside a cylinder. An average force of 100n acts to move the piston 0.2m. During the compresion, 5j of heat are conducted away from the gas. What is the change in internal energy of gas?
A softball pitcher throws an underhanded pitch with the arm fully extended (straight at the elbow). What force did the muscles exert to cause the arm to rotate
A block of mass m1 = 3.90 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, What is the magnitude of the tension in the cord
Two railroad cars, each of mass 7850kg and traveling 85km/h in opposite directions, collide head-on and come to rest. How much thermal energy is produced in this collision
On a weekend archeological dig, you discover an old club-ax thatconsists of a symmetrical 10.0 kgstone attached to the end of a uniform 3.5 kg stick. You measure the dimensions of the club-ax as shown in the figure
A circuit contains six 219 O lamps with 60-W bulbs and a 9.4 O heater connected in parallel. The voltage across the circuit is 126 v. What is the current in the circuit if six lamps and the heater are operating?
Two parallel plates having charges of equal magnitude but oppositesign are separated by 12cm. Each plate has a charge density of 36nC/m2. A proton is released from rest at the positive plate. The potential difference across the plates
Two equal point charges of magnitude 4.0 µC are situated along the x-axis at x1 = -2.0 m and x2 = -2.0 m. What is the electric potential energy of this system of charges
A sinusoidally varying voltage is represented by V(t) = (75 V)sin(120?t). What are its frequency and peak voltage
Three moles of an ideal monatomic gas expands at a constant pressure of 2.60 atm, Calculate the amount of heat added to the gas
A quarterback throws a pass that is a perfect spiral. In other words, the football does not wobble, but spins smoothly about an exis passing through eaach end of the ball. how many revolutions has the ball made while in the air
q1. a 2.30-kg object attached to a spring moves without friction b 0 and is driven by an external force given by the
The output voltage of an AC generator is given by Δv= 780 V sin (30πt). The generator is connected across a 0.900 H inductor.Find the following. frequency of the generator. rms voltage across the inductor. inductive reactance. rms current in the in..
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