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A tangential force acts on the rim of a 2.0 kilogram disk-shaped wheel (0.50 m radius) and gives the wheel an angular acceleration of 4.8 rad/s2. neglect friction and find the magnitude of the force.
A 0.24 meter stick balances at its center. If a necklace is suspended from one end of the stick, the balance point moves 8 toward that end. Is the mass of necklace more than, less than, or the same as that of the meter stick.
A 35.0-kg child swings in a swing supported by two chains, each 2.92 m long. The tension in each chain at the lowest point is 430 N. Find the child's speed at the lowest point. Find the force exerted by the seat on the child at the lowest point.
while driving behind a car traveling at 3.55 ms you notice that one of the cars tires has a small hemispherical bump on
Two speakers emit sound waves with frequency of 418 Hz. They are driven by the same oscillator so that they are in phase with each other. How far apart are the antinodes in that standing wave
Two 2.1-cm-diameter electrodes with a 0.10-mm-thick sheet of Teflon between them are attached to a 9.0 V battery, What is the charge before the Teflon is removed
One of the processes observed among elementary particles is the decay of the pi meson, a particle with the rest energy of 139.57 MeV. It decays into a muon and a neutrino. Find the momentum of the muon after the decay
A base on Planet X fires a missile toward an oncoming space fighter. The missile's speed according to the base is 0.81 c. How fast is the space fighter traveling relative to Planet X
A dolphin in seawater at a temperature of 25 °C emits a sound wave directed toward the ocean floor 246 m below. How much time passes before it hears an echo? (The speed of sound in ocean water is 1533 m/s.)
A scientist notices that an oil slick floating on water when viewed from above has many dissimilar rainbow colours reflecting off the surface. She aims a spectrometer at a particular spot and measures the wavelength to be 750 {\rm nm} (in air). The i..
two point charges lie along the y axis. a charge of q1 -14.0 microc is at y 5.0 m and a charge of q2 -2.0 microc is
a woman and her dog are out for a morning run to the river which is located 4.65 km away. the woman runs at 3.95 ms in
A box of mass 52 kg is pushed up an incline that has a total length of 7.0 m and is tilted 21° away from the horizontal. What is the work done by the weight on the box
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