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Bonnie and Clyde are sliding 270 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 395N of force while Bonnie pulls forward on a rope by N of force.
What is the safe's coefficient of kinetic friction on the bank floor?
people often use the term energy crisis implying that we are running out of energy. how can this be if energy is
a 6.1 microc charge is placed at the origin and a -3.8 microc charge is placed at x 25 cm. at what coordinates can a
When a potential difference of 168 V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of 23.0 nC/cm2. What is the spacing between the plates
the magnitude of the net electric field. A lead ball is dropped into a lake from a diving board 6.40 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water.
Neurons in our bodies carry weak currents that produce detectable magnetic fields. A technique called magnetoencephalography, or MEG, is used to study electrical activity in the brain using this concept.
A 35 mm camera with interchangeable lenses is used to take a picture of a hawk that has a wing span of 1.8 m. What would be the ideal focal length of the lens used
An electron is placed in a uniform electric field of strength 210 N/C. If the electron is at rest at the origin of a coordinate system at t = 0 and the electric field is in the positive x-direction
the density of ice is 917 kgm3 and the density of sea water is 1025 kgm3. a swimming polar bear climbs onto a piece of
A light spring-gun projectile launcher is mounted on an 0.593 kg air track glider. compute the speed of the air-track glider after the gun is fired
The Stanford Linear Accelerator can accelerate electrons to energies of 50 GeV. What is their de Broglie wavelength? Recalling that waves can only probe structure as small as their wavelength divided by 2, what fraction of a proton’s diameter (d = 2 ..
The pilot of an aircraft wishes to fly due west in a 33.10 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190 km/h what must its speed relative to the ground be.
The displacement of a wave traveling in the positive y direction id D(y,t) = 52 cm sin(5.5^-1y-72s^-1t). What is the velocity? What is the wavelength? What is the amplitude?
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