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A rowboat with a mass of 94 kg carries a 61 kg rower and 34 kg of water that has accumulated in the bottom. It's drifting forward at 0.94 m/s when the rower scoops up 11 kg of water in a bucket of negligible mass and heaves it horizontally over the stern at a speed of 2.3 m/s relative to the boat. What is the subsequent speed of the boat? (Consider the speed of the water in the bucket given above to be measured with respect to the initial speed of the boat.) m/s
t the vertices of a square are located four identical positive point charges. what is the charge on one of the positive point charges
We have a container of compressed air. Assume that air is a diatomic ideal gas. The volume of the container is 1.35 liters. Find the final volume of the gas
A farsighted man uses eyeglasses with a refractive power of 2.10 diopters. Wearing the glasses 0.03 m from his eyes, What is the correct contact lens prescription
A 330g airtrack cart on a horizontal air track is attached to a string that goes over a pulley with a moment of inertia of 5.00*10^-6 kg*m^2 and a radius of 1.35 cm. Write newtons second law for each of the three objects
A sample of hydrogen atoms is irradiated with light of wavelength 50 nm, what is the kinetic energy (in electron volts) of these photoelectrons
A 1500 kg car carrying four 87kg people travels over a rough "washboard" dirt road with corrugations 4.40 m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude while its speed is 19km/h. The car now s..
If the charge of the point charge in the figure were -2Q (instead of +Q), by what factor would the magnitude of the force on the point charge due to the dipole change.
An athlete crosses a 28 m wide river by swimming perpendicular to the water current at a speed of 0.8 m/s relative to the water. What is the speed of the swimmer with respect to a friend at rest on the ground
A 60 kg front seat passenger in a car moving initially with aspeed of 23 m/s (50 MPH) is brought to rest by an airr bag in a time of 0.4s. What is the impulse acting on the passenger
A 3.0 mW laser produces a beam of light with a diameter of 2.6 mm shines its light on a perfectly absorbing surface. What is the radiation pressure exerted by the beam
Two otherwise identical bodies have temperatures of 330K and 3000K , respectively. By what factor does its emission exceed the emission of the other body
create destructive interference between the speakers. Friction provides the force required for a car to travel around a flat, circular race track.
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