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A dentist's drill starts from rest. After 7.28 s of constant angular acceleration it turns at a rate of 31540 rev/min.Find the drill's angular acceleration.Answer in units of rad/s 2.
If the magnitude of vector A is 10.0 m and that of vector B is 12.5 m, what is the range of values allowed for the magnitude of the sum of A and B?
An electron is moving to the north with a speed of 325 m/s when it encounters a magnetic field of 5 x 10^-5 T. What is the direction of the magnetic force acting on this particle
From the Bohr energy levels calculate the x-ray energy for an electron transition from n=3 to n=2 in Calcium? Find how much energy would have to be transferred to an electron in the n=2 level to raise it to the n=3 level
A 23.5 kg gold bar at25.5°C is placed in a large,insulated 0.800 kg glass container at 15.0°C with 2.00 kg ofwater at 25.0°C. Calculate the final equilibrium temperature
a 100g on object is suspended from a spring. When 40 g are added the soring stretches an additional 5.0 cm. with the total mass of 1140 g the spring is set into vertical oscillations with amplitude of 10cm. What is the total energy of the oscillati..
Consider a cargo ship, with a mass of 5.0×10^8kg . If it is pushed by a tugboat motor (force 8.0×10^6 N), what will be the magnitude of its acceleration
Consider the conical pendulum with an 80.0 kg bob on a 10.0 m wire making an angle of 5.00 with the vertical as shown. Determine (a) horizontal and vertical components of the force exerted by the wire on the pendulum and (b) radial acceleration of th..
most of the motion generated by joints in the human body are examples of levers. an example of a third class lever is
If you run the wire between the poles of a strong horseshoe magnet, subjecting 5.00 cm of it to a 1.95 T field (perpendicular to the wire), what force is exerted on this segment of wire
A 6.0-cm-diameter horizontal pipe gradually narrows to 4.0 cm. When water flows through this pipe at a certain rate, What is the volume rate of flow
She then suddenly reverses direction and walks backward with constant speed. Sketch graphs of velocity and acceleration consistent with this description.
Two converging lenses are placed such that they are three focal lengths apart. A final image is projected on a screen which is measured to be 82.0 cm to the right of the final lens. If it is known that the two lenses have the same focal length of 2..
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