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The isotope 218 84 Po (218.008965 u) can decay by eitheralpha or beta emission. What is the energy release in each case?
A uniform magnetic field B is perpendicular to the plane of rotation. What is the potential difference between the ends of the bar
A clean zirconium surface is illuminated by ultraviolet light. What is the work function (in electron-volts) of the metal
a ball of radius 20.0 cm rolls from rest dawn a ramp, how many revolutions does the ball make while it is in the air
The temperature of 3.25 mol of an ideal diatomic gas is increased by 23.5 ?C without the pressure of the gas changing. By how much does the rotational kinetic energy of the gas increase
A 6 kg block slides along a frictionless horizontal surface. The block is acted on by two forces, a 4.5 N force to the left, and a 7.5 N force to the right. At what rate is the 4.5 N force doing work on the block at the instant when its speed is 4..
many masons base the cost for a job on the number of blocks the number of blocks they need to lay. doyel masonry
Two thermal reservoirs are connected by a solid copper bar. The bar is 3 m long, and the temperatures of the reservoirs are 63.0°C and 32.0°C. What is the rate of heat flow through the bar
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.7 m, and the centripetal force acting on the ball, What is the speed of the ball in orbit
Two equally charged particles are held 2.610-3 m apart and then released from rest.The initial acceleration of the first particle is observed to be7.0 m/s2 and that of the secondto be 10.0 m/s2. The mass ofthe first particle is 6.3 10-7 kg.
A box of mass 12.0 kg is sitting on the floor of an elevator which is accelerating upwards at 5.1 m/s2. If the coefficient of static friction between the box and the floor if 0.30, what is the minimum horizontal force needed to just start moving the ..
An electric power station is producing 1.2 x 10+3 W of power that is to be sent to a small town located 11 km away. Find the power lost in heating the wires
A helicopter is lifting two crates simultaneously. One crate with a mass of 112 kg is attached to the helicopter by cable A. what is the tension in each of the two cables
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