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How much work is done by the motor when the position of the arm is moved from x = 0.200 m to x = 0.750 m? If the work is done in 4.50 s, what is the power of the motor in W?
Two ice skaters, Daniel (mass 65.0 kg) and Rebecca (mass 45.0kg), are practicing. Daniel stops to tie his shoelace and,while at rest, find direction of Daniel's velocity after the collision
A particle of mass 4m is placed at a distance of 2.00 m from another particle of mass m. how far will that be orbiting around the earth
A step-down transformer produces a voltage of 6.0V across the secondary coil when the voltage across the primary coil is 140V, What voltage appears across the primary coil of this transformer
What is the friction force that acts on the bear?
An ion accelerated through a potential dif- ference of 177 V experiences an increase in kinetic energy of 6.03 × 10?17 J . Find the magnitude of the charge on the ion.
A small insect is placed 7.90cm from a +8.00%u2212cm -focal-length lens. Calculate the position of the image
Four horses are tethered at 4 corners of a square field of side 70 metres so that they just cannot reach one another. What is the area left ungrazed by the horses
An 24 g rifle bullet traveling 370 m/s buries itself in a 4.8 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. find the maximum vertical displacement of the pendulum.
Consider a car which weighs about 2000 kg and is parked at an elevation of 30 m above the bottom of a hill with a constant slope equal to -.5. what is a horizontal component of the force on the car
A student sets up a double slit interference experiment using light of wavelength λ. The separation between the slits is 25λ. What are the angles for the first three dark fringes
A single-turn wire loop is 3.6cm in diameter and carries a 620mA current. Find the magnetic field strength on the loop axis, 22cm from the center
An electromagnetic wave has the wavelength of 42.6 ?m and intensity of 78.5 W/m^2. Find the momentum of one photon
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