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A cooling fan is turned off when it is running at 850rev/min. It turns 1500 revolutions before it comes to astop. What is the fan's angular acceleration, assume d constant?
The wall of a house consists of three layers: a wooden outer wall with an R factor of 1.0, a 3in layer of fiberglass insulation with an R factor of 11, what is the rate of heat loss throug an 8ft by 15ft section of this wall
Plane monochromatic waves with wavelength 520 nm are incident normally on a plane transmission grating having 350 slits/mm
a 15.0-cm-iong solenoid with radius 2.50 cm is closely wound with 600 turns of wire. the current in the windings is
The figure below shows the horizontal forces acting on a sailboat moving north at constant velocity, seen from a point straight above its mast. At the particular speed of the sailboat, the water exerts a = 389-N drag force on its hull and ? = 36.0°.
A 0.200-kg block along a horizontal track has a speed of 1.40 m/s, What is the spring's maximum compression if the track is frictionless
q1. when a surface is irradiated with light of wavelength 4950 a a photo current appears that vanishes if a retarding
Two musicians are comparing their clarinets. The first clarinet produces a tone that is known to be 442Hz, If the second clarinet produces a higher pitched tone than the first clarinet, what is the second clarinet's frequency
Two skaters are studying collisions on an ice-covered(friction-less) lake. Skater 1, (m1=85 kg) is initiallytraveling with a speed of 5.0 m/s, and skater 2 (m2=120kg) is intially at rest. Skater 1 then "collides" with skater 2 and they lock arms an..
A(n) 1340 kg car moving with a speed of 16.6 m/s collides with a utility pole and is brought to rest in 0.299 s
A device used in radiation therapy for cancer contains 6.20×10-1 g of cobalt 2760Co (59.9333819 u). Determine the activity of the radioactive material
A lost shipping container is found resting on the ocean floor and completely submerged. The container is 6.2 m long, 2.5 m wide, and 2.8 m high, What is the mass of the container
An element in its solid phase has mass density 2100kg/m3 and number density 4.39×1028atoms/m3. What is the element's atomic mass number
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