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A block hangs from a string from the outside rood of a van. When the van rounds a corner of radius equal to 150cm at a speed of 28m/s,the block swings to the outside and makes and angle theta with the vertical. Determine the angle
A boy scout starts a fire by using a lens from his eyeglasses tofocus sunlight on kindling 4.6 cm fromthe lens. What is the maximum magnification that can be achieved
If a 120g mass was placed at the 25cm mark, and a 20 g mass at the 12 cm mark, where must a 500 g mass be placed to balance the system?
What is the net force exerted on the skier, assume his acceleration is constant.
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons).
A 25 kg projectile is fired by accelerating it with anelectro magnetic rail on the earths surface. The rail makes a 30degree angle with the horizontal, and the guns applies a 1250 Nforce on the projectile for a distance of 7.50 m along the rail.
26g of copper pellets are removed from a 300 C oven and immediately dropped into 110mL of water at 25 C in an insulated cup
An airtight box has a removable lid of area 2.0 10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.75 x10^5Pa. The inside of the box is completely evacuated. What is the magnitude of force nece..
Through a pipe 17.0 cm in diameter,water is pumped from the Colorado River up to Grand Canyon Village,located on the rim of the canyon. The river is at an elevation of564 m and the village is at an elevation of 2093 m.
A stone thrown off a bridge 20 m above a river has an initial velocity 14m/s of at an angle of 45 degrees above the horizontal. At what velocity does the stone strike the water
Four identical particles, each with mass m = 10-6 kg and charge Q = 10-6 C, are initially at the four corners of a square with side-length a = 0.01 m. what is the final speed of the released particle once it is very far away
A student sitting on a frictionless rotating stool has rotational inertia 0.95 about a vertical axis through her center of mass when her arms are tight to her chest. what's her new rotational velocity
A coin placed on a turntable rotating at 33.6 rev/min will stay there if its center is placed no further than 8.3 cm from the axis of rotation. compute coefficient of friction between the coin and turntable
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