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0.5m side wooden cube floats on the lake surface with 2/3 of the cube submerged under the water. calculate the minimum work down on the cube that would sink it?
An injured monkey sits perched on a tree branch 3.0 m above the ground, while a wildlife veterinarian is kneeling down in the bushes 88.5 m away attempting to subdue the monkey with a tranquilizer gun.
A glider moves frictionlessly along an air track that has been tilted by 1.5 inches over a span of 1.00 meters. Illustrate what is the expected acceleration of the glider.
A playground merry-go-round has a radius of 4.20 and a moment of inertia of 255, What is the work done by the child
Halley's comment moves in an elliptical orbit around the sun with eccentricity e=0.967. Its distance from the sun at perihelion is rmin=8.9 x 10^7 km. Calculate the orbital period of Halley's comet
A silicon solar cell looks like a battery with a 0.48V terminal voltage. what percentage of the energy incident on the cell is converted to electric energy
A string with a length of 3.0 m has two adjacent resonances at frequencies 112 Hz and 140 Hz. What is the wavelength of the first harmonic
An automobile starter motor has an equivalent resistance of 0.0660 ? and is supplied by a 12.0-V battery with a 0.0170-? internal resistance. What is the current to the motor
What is the terminal speed of a 5.6 kg spherical ball with a radius of 3.0 cm and a drag coefficient of 1.55? The density of the air through which the ball falls is 1.2 kg/m3
A planet's moon travels in an approximately circular orbit of radius 5.4 107 m with a period of 7 h 21 min. Calculate the mass of the planet from this information
A beam of light in air strikes a slab of glass (n= 1.50) and is partially reflected and partially refracted. Find the angle of incidence
Laser light of wavelength 632.8 nm falls normally on a slit that is 0.0250 mm wide. The transmitted light is viewed on a distant screen where the intensity at the center of the central bright fringe is 8.50 W/m2.
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, and hits the ground one second after that. how tall is the building? how fast did the ball strike the ground?
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