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An electric trimmer blade has rotational inertia 1.85×10^-4 kg*m^2.
A) What torque is needed to accelerate this blade from rest to 645 rpm in 1.35 seconds ?
B) How much work was done to accelerate the blade?
A -49nC charge is distributed uniformly along the x-axis from x= -1.2m to x= 4m. Consider a point at y= 1.9m on the y-axis, What is the total magnitude of the electric field at the point
A 2.0 cm tall object is placed 5.0 cm in front of a +12 diopter lens. What is the linear magnification
the motion of a projectile fired at t0. it initial speed is 50 ms and its initial projection angle is 45 degree from
A 200 W speaker is playing at full power. The speaker is at the center of a 1 m radius spherical chamber. What is the total sound power that reaches the walls
The two liquids do not mix. What is the difference in height between the top surface of glycerine and top surface of the alcohol.
A gardener feels it is taking him excessively long to water a garden with a 0.952cm diameter hose. By what factor will his time be shortened, if he uses a 1.58 cm diameter hose.
Coffee filters behave like small parachutes, with a drag force that is proportional to the velocity squared, Fdrag = Kv2. Find the time for the combined filters to reach the ground
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air, that the patient and platform start from rest, determine the recoil velocity
A 3.0m length of straight wire carries a current of 18A in a uniform magnetic field of 70mT whose direction is at an angle of 36o from the direction of the current.
A 7.9-m long string is moved up and down with simple harmonic motion with a frequency of 91 Hz. Determine the velocity of the wave on the sting
Some extreme sport enthusiasts have been know to jump off the top of El Capitan, It is very important that the parachute be far away from the cliff when opened. How far is the jumper from the cliff when opening the parachute
A 1.050 kg air-track glider is attached to each end of the track by two coil springs. Find the effective spring constant of the system
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