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A driver in a car, originally moving at 12.9 m/s, applies the brakes until the car comes to a stop. The car moves a distance of 34.8 m while braking. How much time did it take for the car to stop? Assume constant acceleration during braking.
A glass lens has a convex surface with radius 25.0 cm and a concave surface with a radius of 50.0 cm. The glass has index of refraction of 1.51. Calculate the focal length of this lens
A 20 g plastic ball is moving to the left at 35 m/s. How much work must be done on the ball to cause it to move to the right at 35 m/s
An electronic flash unit for a camera contains a capacitor with a capacitance of 840F. When the unit is fully charged and ready for operation, the potential difference among the capacitor plates is 340V.
To stretch a certain spring by 2.50cm from its equilibrium position requires 9.00J of work, What was the maximum force required to stretch it by that distance
They are 15.0 m above a fire-fighters safety net. When landing jumper stretches the net 1.0 m before coming to rest. A. what was the average acceleration experienced by the jumper when slowed to rest by the net? B. Is this acceleration positive or ne..
A roller coaster (385 kg) moves from A (5.00 m above the ground) to B (27.0 m above the ground). What is the change in the car's kinetic energy
what uniform magnetic field applied perpendicular to a beam of electrons moving at 3.59 x 106 ms is required to make
A laser emits light at power 3.00 mWand wavelength 633 nm. The laser beam is focused (narrowed) untilits diameter matches the 1266 nm diameter of a sphere placed in itspath. What is the beam intensity at the sphere's location
An electron is released near a (a) point charge, (b) an charged line of infinite length, or (c) an infinite charged plane. In which of these cases does the electron undergo constant acceleration?
A novice skier, starting from rest, slides down a frictionless 34° incline whose vertical height is 128 m. How fast is she going when she reaches the bottom.
The speed of a light wave in a certain transparent material is 0.501 times its speed in vacuum, what is its wavelength in nanometers
A parallel-plate capacitor has plates with an area of 750 cm2 separated by 0.6 mm. What is the electric field between the plates
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