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A solid block of copper (p = 8920 kg/m^3) with a volume of 0.2 m^3 is submerged in water.
(a) What is the buoyancy force on the block?
(b) Then, the copper block is formed into a boat so that it now floats. What is the minimum volume of the boat that will allow it to float?
A large electromagnet coil is connected to a 121 Hz ac source. The coil has a resistance 410 ohms , and at this source frequency the coil has an inductive reactance 260 ohms. What must the rms voltage of the source be
The international space station is orbiting at an altitud of 370km above earth's surface. The mass of the earth is 6x10^24kg, Assuming a circualr orbit, whit is the orbital speed of the space station
A 1380-kg racecar is driving around a circular track of radius 157 m, What is the magnitude of the net force acting on the vehicle at this time and the force's direction relative to the velocity
A horizontal 792-N merry-go-round is a solid disk of radius 1.43 m, Find the kinetic energy of the disk after 2.92 s
A Geiger counter consists of a tube of radius r and legnth L centered around a positively charged filament of equal length. What answer do you get for the linear charge density of the filament if you approximate its length to be infinite
A 200 keV electron strikes a copper target and is brought to rest producing a single X-ray photon. What is the Compton scattering angle relative to the direction of the incident X-ray
Show that the Earth's orbit will be a parabola (and so the Earth will escape to infinity) and If the Sun's mass suddenly doubles, what will be the Earth's orbital period?
An electric eel delivers a current of 0.85A to a small pencil-thin prey 15cm long. Estimate the energy delivered to the fish
How does hydrogen bonding affect large molecules like proteins? What shapes do proteins take because of this effect?
q1. a persons heart and head are 1.2m and 1.7m above the feet respectively. find out the potential energy associated
A meter stick is supported on a fulcrum at the 17 cm mark. A 0.70 kg object is hung from the zero end of the meter stick, What is the mass of the meter stick
Niagra Falls has a typical flow rate of 4 million cubic feet per minute. This water falls 165 feet. What is the average force of the water on the rock
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