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A constant force of 45 N directed at angle ? to the horizontal pulls a crate of weight 100 N from one end of a room to another a distance of 4 m. Given that the vertical component of the pulling force is 12 N, calculate the work done by the force in moving the crate.
A constant force vector F =(8.0i+9.0j+12.0k)N acts on a small object of mass 95 g. What is the angle between F vector and d vector
The angular speed of an automobile engine is increased from 1540.0 rev/min to 1865.0 rev/min in 17.0 s. How many revolutions does the engine make during this time
need these short essay questions done asap. valid reputable sources are needed as is a works cited. interned sources
The core of an optical fiber has an index of refraction of 1.27, What is the critical angle for total internal reflection at the core-cladding interface
Two particles each have a mass of 5.5 x 10-4 kg. One has a charge of +4.8 x 10-6 C, and the other has a charge of -4.8 x 10-6 C. How fast is each particle moving when the separation between them is one-third its initial value
A trap door, of length and width 2.35 m, is held open at an angle of 65.0° with respect to the floor. what is the torque exerted on the trap door by the rope
A ball of mass 0.30 kg is fired with velocity 160 m/s into the barrel of a spring gun of mass 2.5 kg initially at rest on a frictionless surface. What fraction of the ball's initial kinetic energy is stored in the spring
An unknown substance has a mass of 0.125 kg and an initial temperature of 94.7. calculate the specific heat of the unknown substance
A Carnot engine takes in heat from a reservoir at 470°C and releases heat to the lower-temperature reservoir at 200°C. What is its efficiency.
a 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. if the person and the
After a 0.813 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.46E+6 m/s. Through what angle was the photon scattered
q1. for a damped oscillator with a mass of 280 g a spring constant 140 nm and a damping coefficient of 74 gs what is
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