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The aurora is caused when electrons and protons, moving in the earth's magnetic field of 5x10^-5 , T collide with molecules of the atmosphere and cause them to glow. What is the radius of the circular orbit for (a) an electron with speed 3.0×10^6m/s and (b) a proton with speed 5.0×10^4m/s
A 3.00-g copper penny at 25.0 C drops 50.0 m to the ground. (a) If 60 percent of the initial potential energy of the coin earth system goes increasing internal energy of the coin determine the coin's final temperature (b) does the result depends on m..
An RC circuit with C = 38.8 µF and R = 6.5 has a 27 V source in it. With the capacitor initially uncharged, an open switch in the circuit is closed. What is the voltage across the capacitor at that time
During a severe storm in Palm Beach, Fla., on January 2, 1999, 33 inches of rain fell in a period of nine hours. estimate the average upward force exerted by one square meter of ground to stop the falling raindrops during the storm
An object 0.680cm tall is placed 18.5cm to the left of the vertex of a convex spherical mirror having a radius of curvature of 25.0cm. Calculate the position of the image
A solid spherical target which weighs 10 kg and has a radius of 25 cm rests on a frictionless table. What is the angular speed of the sphere after the collision
A 0.17- kg block on a wooden table is given a sharp blow with a hammer. The block then slides across the table to a stop. How far does the block go
The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5
An ice block is pushed horizontally on a frictionless surface with initial velocity v0. At some point, it comes to the nearly semicircular bump with a radius R=0.42m and the height h=0.33m above the ground.
the membrane that surrounds a certain type of living cell has a surface area of 7.3 x 10-9 m2 and a thickness of 1.9 x
Find out kinetic energy of the merry-go-round
You are using a standard microscope with a 0.10NA 4x objective and switch to a 0.65NA 40x objective. What are the acceptance angles for each
A charging cell phone battery requires a current of 1.60 A and power is dissipated in the battery at 7.52 W. Determine the current drawn from the wall by the charger
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