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In carbon-nitrogen nuclear fusion cycle, protons are fused to form a helium nucleus. Positrons releases some energy. The number of protons fused and the number of positrons released in this process respectively are
Galileo's great-great-great grandchild stands at the top of a vertical tower 59.0 m tall with a Chianti bottle. How long does it take for the bottle to fall to the ground
A well-insulated container of negligible heat capacity contains 150g of ice at 0 degrees. If 20g of steam is injected into the container, what is the final equilibrium temperature of the system
A brave child decides to grab on to an already spinning merry-go-round. The child is initially at rest and has a mass of 34.5 kg. What is the moment of inertia of the merry-go-round
Two forces, of magnitude F1 = 80.0 N and F2 = 45.0 N, act in opposite directions on a block which sits atop a frictionless surface. Find the work W1 done on the block by the force of magnitude F1= 80.0 N as the block moves from xi = -1.00 cm to xf =..
A car of mass 1790 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 15 m/s, illustrate what is the frictional force between the road and the tires?
A 0.145- kg baseball traveling 34.50 m/s is stopped in 0.183 s by a catcher's mitt. What is the average force on the catcher's mitt
Jack and Jill are standing on a crate at rest on the frictionless, horizontal surface of a frozen pond. What is the final speed of the crate if Jack jumps first and then a few seconds later Jill jumps in the same direction
The speed of the fastest-pitched baseball was 41.0 m/s, and the ball's mass was 145 g. How many joules of kinetic energy did this ball have
A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 3.00 10-23 kg·m/s from 1.30 10-23 kg·m/s in a time of 6.80 10-6 s. What is the magnitude of the electric field?
Velma passes Mort at a speed of 0.75c. At this speed, the "time dilation factor" is 1.5. In other words, Mort observes a 1-second tick of Velma's clock to take 1.5seconds. assume that they are born at the same time, and that Mort observes himself ..
Speedboat A negotiates a curve whose radius is 115 m. Speedboat B negotiates a curve whose radius is 194 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
The filament of a 127 W (116 V) lightbulb is a tungsten wire 0.05 mm in diameter. How long is the filament
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