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Two long barges are moving in the same direction in still water, one with a speed of 10 km/h and the other with a speed of 18 km/h. While they are passing each other, coal is shoveled from the slower to the faster one at a rate of 460 kg/min. How much additional force must be provided by the driving engines of (a) the faster barge and (b) the slower barge if neither is to change speed? Assume that the shoveling is always perfectly sideways and that the frictional forces between the barges and the water do not depend on the mass of the barges.
a 0.144 kg glider is moving to the right on a frictionless horizontal air track with a speed of 0.700ms . it has a
A graph of position versus time for a spring oscillation is shown below. The mass of the oscillator is known to be 4.00 kg . Answer the following questions concerning the motion of the mass. What is the maximum velocity of the oscillator?
The charge on a capacitor is initially -2 microC and growing linearly with time. what is the resistance of the lightbulb
A 360 kg piano slides 2.5 m down a 28 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline
Drawbridge Exercise and we'll reflect on who may be to blame. In doing so, we'll use our sociological imagination. For our discussion, please address the following:
A weather vane initially at rest has a moment of inertia of 0.122 kg · m2 about its axis of rotation, Find the angular velocity of the weather vane just after it is struck
Find the buoyant force for the two objects when they are placed into water, Next, find the percent difference between the two buoyant forces
Two ball, of equal masses mA = 40g and mB = 60g, are suspendedas shown. What is the velocity of each ball after the elastic collision
a sound waves in air at 20 c has frequency of 150 hz and a displacement amplitude of 5.00 x 10-3 mm. for his sound wave
A small bird's wings can undergo a maximum displacement amplitude of 4.8 cm (distance from the tip of the wing to the horizontal). what is the oscillation frequency of the wing tips
If friction (rolling friction and air drag) results in a retarding force of 321 N at a speed of 50 km/h, what is the minimum energy needed to move the car a distance of 283 m at a constant speed of 50 km/h? (kJ)
Two lightbulbs have cylindrical filaments much greater in length than in diameter. The evacuated bulbs are identical except that one operates at a filament temperature of 2 195°C and the other operates at 2 085°C. Find the ratio of the power emitt..
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