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A mixing beater consists of three thin rods, each 10.0 cm long. The rods diverge from a central hub, separated from each other by 120°, and all turn in the same plane. A ball is attached to the end of each rod. Each ball has cross-sectional area 4.00 cm^2 and is so shaped that it has a drag coefficient of 0.600. Calculate the power input required to spin the beater at 1000 rev/min (a) in air and (b) in water.
A projectile is fired up into the air at a speed of 119 m/s at an angle of 23° relative to the horizontal. Determine the maximum height the projectile will reach.
What is the speed of the second asteroid? Now suppose that the first and second asteroids carry charges of 3.68 C and -3.68 C, respectively. How fast would the second asteroid have to be moving in order to occupy the same circular orbit as before?
A 103.29 cm-long steel string with a linear density of 2.56 g/m is under 240.31 N tension. What is the wavelength of the sound wave that reaches your ear in a 11.65oC room
Sea birds tuck in their wings and dive straight down into the water when hunting for fish near the surface. If a pelican starts a dive from 16.0 m, with what speed will it strike the water
Consider neon, a noble gas whose molecules consist of single atoms of atomic mass 0.02 kg/mol. Avogadro's number is 6.02 × 1023 mol-1, what is the average kinetic energy of a neon atom
A cryogenic storage container holds liquid helium, which boils at 4.2 K. Suppose a student painted the outer shell of the container black, Determine the rate of heat loss due to radiation
q1.a square coil of wire with 15 turns and an area of 0.40 m2 are placed parallel to a magnetic field of 0.75 t. the
Four identical springs are used as part of a car's suspension system, one on each wheel. What will be the frequency at which the car will bounce
A 5kg steel ball is dropped onto a copper plate from a heightof 10m. If the ball leaves a dent 3.2mm deep, what is the average force exerted by the plate on the ball during impact
A uniform 1.3 kg rod that is 0.8 m long is suspended at rest from ceiling by two springs, one at each end of the rod. Both springs hang straight down from the ceiling.
In the afternoon, the decibel level of a busy street is95 dB with 100 cars passing at a givenpoint every minute. What is the late night decibel level
There is force of F = 2.5N i + 3.5N j at r = 1.0m j - 4.0m k. What is the angle between the force vector and the radius vector
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