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A 50-cm-long, 2-mm-diameter electric resistance wire submerged in water is used to determine the boiling heat transfer coefficient in water at 1 atm experimentally. The wire temperature is measured to be 130°C when a wattmeter indicates the electric power consumed to be 4.1 kW. Using Newton's law of cooling, determine the boiling heat transfer coefficient.
A 0.340-kg tennis racket strikes a 57.0-g tennis ball. The tennis ball has an average acceleration of 95.0 m/s2 during the collision. Find the magnitude of deceleration of the racket
When monochromatic light shines perpendicularly on a soap film (n = 1.33) with air on each side, What is the vacuum wavelength of the light in nm
The inlet ducting to a jet engine forms a diffuser that steadily decelerates the entering air to zero velocity relative to the engine before the air enters the compressor. determine the temperature, in degrees Celsius, of the air entering the compr..
A 205 kilogram log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. Evaluate what the tension in the rope
A hockey puck moving along the +x axis at 0.42 meter per second collides into another puck that is at rest. The pucks have identical mass. Obtain the speed and direction of the second puck after the collision
A flywheel in a motor is spinning at 530 rpm when a power failure suddenly occurs. The flywheel has mass 40.0kg and diameter 75.0cm. how many revolutions would the wheel have made during this time
You would like to slow down your aging process by traveling very fast relative to Earth on a spaceship. What is the required speed of the spaceship
In 0.2s, a coil of die with 50 loops experiences an average induced emf of 9v due to a changing magnetic field perpendicular to the plane of the coil. what is the final strength of the field
A 6 N force acts on a 0.3-kg object for 0.3 seconds. By how much does the object's momentum change (in kg-m/s)
a .5 m length of rigid metal rod is connected through two springs with 10 nm spring constants perpendicular to the rod
Consider two blocks attached by a mass less rope that is strung over a frictionless and mass less pulley. Find which direction is the blocks moving and are they accelerating
A point-like mass m=0.5 kg is attached to the rim of a uniform disk of moment of inertia I=0.05kg m^2 and radius a=0.25m. Find the initial angular acceleration and the maximum angular speed
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