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My moter has effciency of 80% with a flywheel attached to its shaft. The flywheel had a diamter of 2 ft and weighs 40 pounds. It starts not moving then accerates to 200 rpm after 8 seconds. What is the input power in watts.
The distance from the point on the surface of Earth to a point on a surface of the moon is measured by aiming a laser light beam at the reflector on the surface of moon and measuring the time required for the light to make a round trip.
Two thin beams are joined end-to-end to make a single object. The left beam is 11.9 kg and 1.00 m long and the right one is 41.1 kg and 2.00 m long. What is the gravitational torque on the objects about an axis through its left end
Jaime has a 4-kilogram mass on a 3 meter string, and he is swinging it around in a circle. How much force is Jaime using to pull the mass toward himself
a) What power contact lens should an optometrist prescribe to move the myopic far point out to infinity. b) with this correction, can Brian also read a book held at the normal near point, 25 cm from his eye.
q1. an airplane is flying with a velocity of 80.0 at an angle of 26.0 above the horizontal. when the plane is a
A block of mass m = 2.10 kg is pushed a distance d = 4.20 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N, Determine the work done on the block by the applied force
A 10 kg crate (begins 3m off the ground) slides along a smooth horizontal frictionless surface at a constant speed of 4 m/s. What is the kinetic energy as it slides on the upper surface
A spherical blackbody radiator has a temperature of 159°C. Its radius is 0.253 m. what is the net rate of energy radiated from the sphere?
A proton is propelled at 2 x 10^6 m/s perpendicular to a uniform magnetic field. If it experiences a magnetic force of 5.8 x 10^-11 N, find the strength of the megnetic field
A hydrogen atom that is initially at rest absorbs a photon with an energy of 21 eV. What is the momentum of the atom
You are driving south on a highway at 28 (approximately 63 ) in a snowstorm. Estimate the speed of the snowflakes relative to the car
A uniform disk of radius 0.471 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
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