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A neutral pie-meson is particle that can be created by accelerator beams. If one such particle lives 1.40 x 10^16 s as measured in the laboratory, and 0.840 x 10^16 s when at rest relative to an observer, what is its velocity relative to the laboratory?
A grindstone of a radius 4 m is firstly spinning with a radius of 8 rad/s. The angular speed is then increased to 12 rad/s over next 4.0 seconds. Suppose that the angular acceleration is constant. What is the average angular speed of grindstone.
Suppose the coefficient of static friction between the road and the tires on a car is 0.60 and the car has no negative lift. What speed will put the car on the verge of sliding
A 3.83 ohm resistor, a 7.53 ohm resistor, and a 9.02 ohm resistor are connected in series with a 15.0 V battery. What is the current in each resistor
Burning a pound of coal produces about 13,000 Btu of energy. How many megajoules of energy are produced by burning 4 pounds of coal?
One of the moons of a planet orbits at a distance of 9375 km from the center of the planet. what is the period of the moon
Dennis, driving his 600 kg car, makes a 90 degree turn. His speed before the turn is 15.0 m/s and after the turn are 20 m/s. What is the magnitude of the change in car's momentum.
A torque of 12 N * m is applied to a solid, uniform disk of radius 0.50 m. I f the disk accelerates at 5.6 rad/s^2, what is the mass of the disk
A student could either pull or push, at an angle of 30? from the horizontal, a 55kg crate on a horizontal surface, Calculate the minimum work required for both pulling and pushing
A chair of weight 74.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 47.0 N directed at an angle of 41.0^circ below the horizontal and the chair slides along floor.
A rectangular coil of wire with an area of 0.218 m2 is situated in a constant magnetic field whose magnitude is 0.450 T, What is the flux through the surface
This time, William Tell is shooting at an apple that hangs on a tree . The apple is a horizontal distance of 20.0m away and at a height of 4.00m above the ground, what is the arrow's initial velocity
A skier with a mass of 59 kg starts from rest and skis down an icy (frictionless) slope that has a length of 44 m at an angle of 32° with respect to the horizontal.
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