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Calculate the energy (in MeV) released when α decay converts thorium 228Th (atomic mass = 228.028715 u) into radium 224Ra (atomic mass = 224.020186 u). The atomic mass of an α particle is 4.002603 u.
A 75 kg ladder that is 3.0 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at a point 1.2 m from the base of the ladder. find the static frictional force between the floor and the ladder
King Arthur's knights fire a cannon from the top of the castlewall. The cannonball is fired at a speed of 54 m/s and at an angle of 30 °. What is the fired ball's maximum height above the ground
A bungee cord is 45.0m long when un-streched. A 1.70m tall jumper (mass 70kg), with both feet tied to the cord, falls from a bridge 85m above the river. what is the speed of the jumper
Calculate the minimum angle above the horizontal at which Hiawatha must aim in order to outrun the arrow.
A football is kicked off at a speed of 24 m/s at 30 degree about the horizontal and lands on the field. What is the horizontal distance from the starting point
A 2.38 mol sample of an ideal gas expands reversibly and isothermally at 278 K until its volume is doubled. What is the increase in entropy of the gas
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 5900 V/m, Calculate the radius r of the path for a singly charged ion
batteries are rated in terms of ampere-hours a middot h. for example a battery that can produce a current of 2.00 a for
When a fish looks up at an angle of 45 degrees with the horizon, does it see the sky or the reflection of the bottom beneath? Explain why.
a crane drops a 1.0 kg steel ball onto a steel plate. the ball's speed just before impact is 2.0 m/s. what is the bounce back speed right after the impact
The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is one-twentieth of an atmosphere. how far below the water can she swim
a barefoot field-goal kicker imparts a speed of 42 meters per second to a football initially at rest. obtain the force exerted by the ball on the kicker's foot
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