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A spherical mirror is polished on both sides. When used as a convex mirror, the magnification is +1/7. Find the magnification when used as a concave mirror, the object remaining the same distance from the mirror?
A 13 kg child on a playground swing moveswith a speed of 2.9 m/s when the 6.0 mlong swing is at its lowest point. What is the angle that the swingmakes with the vertical when the child is at the highest point?
You are standing at rest with respect to the earth holding a lance which you measure as 10 meters long. Which lance hits the other person first
a steam pipe is covered with 1.50 cm thick insulating material with a thermal conductivity of 0.200
A block slides down an inclined plane, starting from rest and being pushed with a constant acceleration of 5.35 m/s2 over a distance of 18.8 cm. Find the total time the block is in motion
Two equal point charges of magnitude 4.0 ?C are situated along the x-axis at x1 = -2.0 m, compute the electric potential energy of this system of charges?
A cylinder contains 3.5 {\rm L} of oxygen at350 {\rm K} and 2.4 {\rm atm}. The gas is heated, causing a piston in the cylinder to move outward. The heating reasons the temperature to rise to 610 {\rm K} and the volume of the cylinder to increase to 9..
A diverging lens has a focal length of 40.7 cm. If an object is 31 cm from the lens, what is the image distance? Answer in units of cm. Also, What is the magnitude of the magnification for this lens?
The magnetic force on a straight 0.37 meter segment of wire carrying a current of 4.5 Amp is 1.0 N. Find the magnitude of the component of the magnetic field
A fly wheel with a radius of 0.400m starts from rest and accelerates with a constant angular acceleration of 0.300 rad/sec^2. find the resultant acceleration of a point on its rim after 2 sec
An astronaut on the space shuttle traveling at a speed of 0.70 c is holding a meter stick parallel to the direction of motion
q1. a combined cycle gas turbine power plant can run at 50 percent efficiency. assume such a plant delivers 1 gw of
A seasoned mini golfer is trying to make par on a tricky hole #5. The golfer can complete the hole by hitting the ball from the flat section it lays on, at what speed must the golfer hit the ball to land the ball in the hole
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