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The drag force acting on a sphere moving through a liquid like water is given by F=6?vr? where F is the drag force, v is velocity of the sphere, r is radius of the sphere, and ? is the viscosity of the liquid. Force has dimensions of (mass * length)/(time2). What are the dimensions of viscosity?
An RLC circuit has a resistor of 300 W, a 1.0 µF capacitor, and an inductor of 450 mH connected to an alternate power source with a voltage, calculate the rms current flowing through the circuit
David is driving a steady 25 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.8 m/s^2 at the instant when David passes.
King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, 13m above the moat. The rock is launched at a speed of 27m/s and an angle of 40oC above the horizontal.
(a) What is the velocity of the boat at t = 18.89 s? (b) Find the total displacement of the boat.
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
Illustrate what current through the wire, and in which direction(LtoR OR R to L)will allow the wire to float in the magnetic field.
A 23 g ball is fired horizontally with initial speed toward a 110 g ball that is hanging motionless from a 1.1m long string. The balls undergo a head on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle theta m..
A person walks first at a constant speed of 5 m/s along a straight line from point A to point B, How much distance does the person cover on her trip
How many electrons would have to be added to one of these spheres to make it electrically neutral?
Assume that you exhale the air at your body's temperature of 37 oC with relative humidity of 80%. Will you see your breath
define the hazards for astronauts inside any spacecraft moving in the vicinity of a pulsar.
Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but last far longer and use much less electricity.
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