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A stalactite on the roof of a cave drips water at a steady rate to a pool 3.8 below. As one drop of water hits the pool, a second drop is in the air, and a third is just detaching from the stalactite What is the position of the second drop when the first drop hits the pool What is the velocity of the second drop when the first drop hits the pool?
A metal rod 0.72m long moves with a speed of 2.2m/s perpendicular to a magnetic field. what is the strength of the magnetic field
A charge Q = 23.0 ?C is distributed evenly on a wire bent into an arc of radius R = 47.0 cm, What is the electric field at the center of the arc that subtends ? = ±40.0°
A steel wire of length 1.97 with circular cross section must stretch no more than 0.260 when a tensile (stretching) force of 400 is applied to each end of the wire. What is the minimum diameter necessary.
the siren of a fire engine that is driving northward at 30.0 m/s emits a frequency of 2000 Hz. A truck in front of this fire engine is moving northward at 20.0 m/s. what frequency does the truck driver hear
a sled is moving down an incline plane, the mass of the sled is 40 kg. the angle is 35 degrees, coefficient of kinetic friction is 0.3. Find acceleration of the sled
A rectanglar block of iron 9.68x10^-8 ohms has dimensions 1.20 X 1.60 X 2.50 cm, What is the minimum resistance of the block
Assume that an inexpensive watch runs 0.004% slower than a "perfect watch" (viz., a "time standard") that neither loses nor gains time, what would the perfect watch measure for this time interval
200 Joules of heat flows into a 35 g sample. If the temperature increases by 10°C, then what is the heat capacity of the sample
Two cars start from rest from point A on a circular track of radius r=200 m. Find the angular acceleration of the blue car in rad/sec^2
At one instant, a 0.26 kg particle is located at the position [r=(5.9m)*i+(5.5m)*j]. What is the angular momentum of the particle about the origin, in unit-vector notation
A platform is rotating with an angular speed of 3.00 rad/s and an angular acceleration of 11.0 rad/s2. what is the magnitude of the total acceleration a
A wooden block (mass 0.1kg) is set on a rotating disk. What is the minimum coefficient of friction to ensure the block does not slide outward
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