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Two 10-cm-diameter charged rings face each other, 21.0cm apart. Both rings are charged to + 50.0nC. What is the electric field strength at the midpoint between the two rings?
The left face of a bioconvex lens has a radius of curvature of 10.3 cm, and the right face has a radius of curvature of 15 cm. Calculate the focal length of the lens
If the water in the river is flowing at 3.0 m/s, explain how long does it take the boat to make a round trip consisting of a 250 m displacement downstream followed by a 250 m displacement upstream?
An electron of mass, m, collides with an atom of mass M. The atom is initially at rest, What is the minimum speed of the electron in order to excite the atom
A stone is dropped into a river from a bridge 41.9 m above the water. What is the initial speed of the second stone
Suppose that a disk rotates through two revolutions in 4.2 seconds. What is its displacement in radians in this time
A performer at the Cirque de Dartmouth is shot by a cannon elevated at 30 degrees from the horizontal. What was the highest point in his trajectory
an electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate, What is the kinetic energy of the electron just as it reaches the positive plate
An object is initially placed on the optical axis 21.2 cm to the left of a convex lens that has a focal length of 12.1 cm. what is the new image distance
A 211kg rock sits in full sunlight on the edge of a cliff 4.90m high. The temperature of the rock is 30.2?C. what is the final temperature of the rock-water system
Electrons are accelerated through a potential difference of 39.0 V. The beam of electrons then passes through a single slit. estimate the width of the slit
A student sits on a rotating stool holding two 3.0 kg objects. When his arms are extended horizontally, Find the new angular speed of the student
A three-step cycle is undergone by n moles of an ideal diatomic gas: (1) the temperature of the gas is increased from T_1 to T_2 at constant volume, compute the efficiency of the cycle in terms of T_1 and T_2
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