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A 200kg projectile is launched with a speed of 50m/s at an angle of 30o from level ground. How much Kinetic Energy will it have when it hits the ground?
An inventor claims to have devised a cyclic engine which exchanges heat with reservoirs at 300 K and 540 K, and which can produce 450 J of work per 1000 J of heat extracted from the hot reservoir. Is his claim feasible.
Estimate the shear stress if this force is ex- erted on a 0.412 cm -thick pine board that is 13.7 cm wide
Two parallet wires separated by 7.0 cm repel each other with a force per unit length of 1.5 x 10^-4 N/m. The current in one wire is 3.0 A
A gas is enclosed in a cylinder fitted with a light frictionless piston and maintained at atmospheric pressure, evaluate the change in internal energy of the gas
A conducting sphere that carries a total charge of -9.1 µC is placed at the center of a conducting spherical shell that carries a total charge of +1.7 µC. Determine the charge on the outer surface of the shell
An aircraft with a mass of 996 kg accelerates from 0 to 87 m/s in 6.2 seconds, at which time the aircraft launches. What is the kinetic energy of the aircraft when the aircraft launches
The spring is aligned with the plane and has a spring constant of 133 N/m. Explain how much does the spring stretch?
An archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 2.20 m/s on a smooth, What is the speed of the arrow after passing through the target
Two point charges of equal magnitude are 7.3cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 40N/C . Find the magnitude of the charges.
A sample of a radioactive isotope is measured to have an activity of 237.1 mCi. how many nuclei of the isotope are there at this time
A projectile is fired at v0 = 407.0 m/s at an angle of ? = 72.0o with respect to the horizontal. How far will the projectile travel in the horizontal direction
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 20.0 m/s at an angle 54.0 degrees; What is the distance between the two girls
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