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1. A large power reactor that has been in operation for some months is turned off, but residual activity in the core still produces 150 MW of power. If the average energy per decay of the fission products is 1.00 MeV, what is the core activity in curies?
2. Find the mass converted into energy by a 12.0-kT bomb.
A duck is swimming down a river and passes a slow moving log. If the log had a mass of 35.2 kg, and the duck was swimming at 3.00 m/s, what is the log\'s kinetic energy
A box of mass 25 kg is dragged across a level floor by a rope that makes an angle of 25o above the horizontal. Find the force F that will ensure the box moves with constant speed
If the Earth were compressed to half its diameter, what would the acceleration due to gravity on its surface be
A 280-m-wide river has a uniform flow speed of 1.4 m/s through a jungle and toward the east. How long will the boat take to cross the river and land in the clearing
An airplane has an effective wing surfacearea of 10 m2 that is generating the lift force. What is the weight of the plane
a parallel plate capacitor with plate separation d is connected to a battery. the capacitor is fully charged to q
If an astronomical telescope has the magnification of -32.0 ? and its objective lens has a focal length of 77 cm, what is the focal length of its eyepiece
What is the speed of the stone if it hits the wall
The moon has a period of 27.3 days and has a mean distance of 3.90 x 105 km from the center of Earth. Discover the period of an artificial satellite that is in orbit 6.70 x 103 km from the center of Earth.
A .012Kg bullet is fired horizontally into a 2Kg block that is initially at rest on a table as shown. The bullets initial veloctiy is 300m/s. The coefficient of kinetic friction between the block and the table is .40. what is the initial kinetic e..
Two 10-cm-diameter charged disks face each other, 20 cm apart. The left disk is charged to +55 nC and the right disk is charged to -55 nC. What is the electric field both magnitude and direction, at the midpoint between the two disks
A picture frame hung against a wall is suspended by two wires attached to its upper corners.if the two wires make the same angle with the vertical, what must his angle be if the tension in each wire is equal to 0.75 of the weight of the frame?
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