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A centrifuge in a medical laboratory is rotating at an angular velocity of 360 revolutions/minute. When it is switched off, it rotates 50 times before coming to rest. Find the constant angular deceleration of the centrifuge
Four 25 kg children are sitting on the edge of a 3 m radius 80kg merry go round that is shaped like a disk. Its frequency is 1/3 Hz, What is the moment of inertia before and after
A typical wall outlet voltage is 120 volts in the United States. calculate the number of turns on the secondary coil of the adapter transformer
An electric field is E = 400 N/C i for x > 0 and E = -400 N/C i for x
Water has a density of 1000 kg/m^3. One atmosphere is 1.013 X 10^5 N/m^2. Find the pressure in the upper pipe
One morning in New York City at 9:AM, Larry looks south and sees the moon is due south. Suppose Curly were to look at the Earth again 7 days later. What would the apparent shape of the Earth be
A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. how fast is the roller coaster traveling at the bottom of the dip
A shopper walks from the door of the mall to her car 310m down the lane of cars, then turns 90° to the right and walks an additional 70m. What is the magnitude of the displacement of her car from the mall door.
A thin rod of length 0.84 m and mass 190 g is suspended freely from one end. find how far above that position the center of mass rises
An air parcel occupied by an ideal gas (T1 = 255 K, V1 = 1500 m3, m1 = 1680 kg) collides and mixes with a second air parcel occupied by a second ideal gas (T2 = 280 K, V2 = 1200m3, m2 = 1392 kg). Assuming the specific heat capacities of the gases in ..
A mass of 145 g of hot coffee at 90.0 oC is poured into an insulated cup containing 240 g of ice initially at 0.0 oC. How many grams of liquid will there be then
fish tank filled with water is made of flat glass walls of n = 1.52. What is the maximum angle of incidence for a light ray
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter and carries a current of 55 A. If the bird's feet are 3.9 cm apart, calculate the potential difference between its feet. (Th..
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