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An electric motor rotating a workshop grinding wheel at a rate of 98 rev/min is switched off. Suppose the wheel has a constant negative angular acceleration of magnitude 2.00 rad/s2.
(a) Find how long does it take for the grinding wheel to stop?
s
(b) Determine through how many radians has the wheel turned during the interval found in (a)?
rad
A 26 kg gun is standing on a frictionless surface. The gun fires a 55.2 g bullet with a nmuzzle velocity of 320 m/s. Calculate the momentum of the gun immediately after the gun wasfired
A 200?F defibrillator capacitor is charged to 1500 V.When fired through a patient's chest, it loses 95% of its charge in 40 ms
A traveling sinusoidal electromagnetic wave in vacuum has an electric field amplitude of 57.1 V/m. Find the intensity of this wave and calculate the energy flowing during 16.9 s through an area of 0.0217 m2
An ideal gas expands isothermally, performing 2.59E+3J of work in the process. Compute the change in internal energy of the gas.
A gas with a volume of 4.0 L is at a pressure of 1.0 atm at a temperature of 300 K. It is compressed adiabatically to a volume of 1.0 L. The gas has gamma = 1.4.
A car starts from rest at a stop sign. It accelerates at 4 for 6.4, coasts for 1.5, and then slows down at a rate of 3.5 for next stop sign. How far apart are the stop signs.
A 2.354 kg block is on a horizontal surface with ?k = 0.170, and is in contact with a lightweight spring with a spring constant of 526 N/m which is compressed. What is the velocity of the mass as it breaks contact with the spring
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A 130g oscillator has a speed of 124cm/s when its displacement is 2.10cm, What is the oscillator's maximum speed
A certain β-decay process has three components, with maximum energies 0.672, 0.536, and 0.256 MeV. find the mass difference between the nuclear ground states
Starting from rest, a 5.2-kg blockslides 2.40 m down a rough 30.0°incline. The coefficient of kinetic friction between the block and the incline is µk = 0.436. Determine the work done by the force of gravity.
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