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A 2.0 kg mass is projected from the edge of the top of a 20mtall building with a velocity of 24m/s at some unknown angle above the horizontal. Disregard air resistance and assume the ground islevel. What is the kinetic energy of the mass just before itstrikes the ground?
A charged cork ball of mass 0.50 g is suspended on a light string in the presence of a uniform electric field, Find the charge on the ball
A 2.55-cm-diameter parallel-plate capacitor with a spacing of 0.38 mm is charged to 300 V. What is the total energy stored in the electric field
A physicist uses a cylindrical metal can 0.210m high and 0.075m in diameter to store liquid helium at 4.22 K; How much helium is lost per hour? The emissivity of the metal can is 0.200
The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of 0.7 m and an outer radius of 1.3m. Find the magnitude of the magnetic field inside the toroid
A particle with a mass of 3.65×10?24 kg and a charge of 6.40×10?19 C starts at rest and is accelerated for a distance of 0.104 m through a uniform electric field having strength E = 7.25×104 N/C
A person drops an object from a bridge spanning a rushing river, falling a distance h before hitting the water. what would be the object's speed at the moment of impact
The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Suppose that only static friction supplies the centripetal force, & find the radius r of the tyre.
A 15,000?metric ton battle cruiser at rest fires a salvo of six 8?inch shells at a 45o angle with a muzzle velocity of 350 m/s. how far has the cruiser recoiled by the time its salvo hits their target
A bar is used to lift a 100 kg block of concrete. The pivot is 1.00 m from the block. Find the mechanical advantage
An undersea research chamber is spherical with an external diameter of 3.90m . The mass of the chamber, when occupied, is 30800kg. What is the buoyant force on the chamber
A 20 g ball is fired horizontally with initial speed v_0 toward a 110 g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle t..
A 5.0 µC point charge is placed in an external uniform electric field of 2.00 104 N/C. At what distance from the charge is the net electric field zero
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