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A projectile is fired at v0=342.0m/s at an angle of theta=72.3degrees with respect to the horizontal. Assume that air friction will shorten the range bye 35.1%. How far will the projectile travel in the horizontal direction, R?
25% of a radioactive material stays active after 4 hours. What is the half-life of this radioactive material
A 120g ball moving at .30 m/s in the + x-direction is subject to a 0.15N force in the - y-direction for 3.0s. Find the magnitude of the ball's momentum change
A certain current on passing through a galvanometer produces a deflection of 100 divisions. The galvanometer resistance would be
A stone has a mass of 9.00 x 10 ^-3 kg and is wedged into the tread of an automobile tire. The coefficient of static friction between the stone and each side of the tread channel is 0.70. determine the radius r of the tire
If it takes 3 golf balls to equal the mass of one tennis ball, what weight of tennis balls do you require equalling the number of golf balls in one kilogram of golf balls.
A person weighs 670N steps onto a spring scale in the bathroom, and the spring compresses by 0.79 cm. What is the spring constant? And what is the weight of another person who compresses the spring by 0.34 cm.
A positron and an electron each of mass 9.1 x 10-31kg are in the same general vicinity and have very small initialspeeds. They then annihilate each other producting two photons
A certain fuel-efficient hybrid car gets gasoline mileage of 55.0 mpg (miles per gallon). If you are driving this car in Europe and want to compare its mileage with that of other European cars, express this mileage in km/l (liter).
Two ice skaters, with masses of 50.0 kg and 85.0 kg, are at the center of a 60.0 m-diameter circular rink. how long does the lighter skater take to reach the edge
A 140 kg piano is being lifted at a steady speed from ground level straight up to an apartment 16.0 m above the ground. The crane that is doing the lifting produces a steady power of 400W. Explain how much time does it take to lift the piano?
A projectile is fired with an initial speed of 61.7m/s at an angle of 31.9^\circ above the horizontal on a long flat firing range. Determine the maximum height reached by the projectile
A 6.4g lead bullet traveling at 460m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in te..
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