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Points A and B have electric potentials of 257 V and 129 V, respectively. When an electron released from rest at point A arrives at point C its kinetic energy is KE1. When the electron is released from rest at point B, however, its kinetic energy when it reaches point C is KE2 = 4KE1. What is the electric potential at point C?
A dentist uses a small mirror of radius 44mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is magnification of the image.
As observed from Earth, the wavelength of Hβ in the spectrum of the star Megrez in the Big Dipper is 486.112 nm. Laboratory measurements demonstrate that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or mo..
A constant horizontal force Fa pushes a 2 kg FedEx package across a frictionless floor on which an xy coordinate system has been drawn. It gives package's x and y velocity components versus time t. What is the magnitude of Fa.
A boy on board a cruise ship drops a 30.0 g marble into the ocean. If the resistive force proportionality constant is 0.500 kg/s, what is the terminal speed of the marble in m/s?
How many 65W light bulbs can be connected in parallel across a potential difference of 85 V before the total current in the circuit exceeds 2.10A.
Calculate the location of the center of mass of the Earth-Moon-Sun system during a full Moon. A full Moon occurs when the Earth, Moon, and Sun are lined up. make Use of a coordinate system in which the center of the sun is at x=0 and the Earth and..
A hawk flies in a horizontal arc of radius 14 m at a constant speed of 5 m/s. (a) Find out its centripetal acceleration. (b) It continues loftly along the same horizontal arc but increases its speed at the rate of 1 m/s2. Find out the acceleration..
Draw a free body diagram for the skydiver in the instant after he jumps.(Assume that at this point his velocity is near zero so that air resistance is still negligible.)
A meat baster consists of a squeeze bulb attached to a plastic tube. While the bulb is squeezed and free, with the open end of the tube under the surface of the basting sauce.
She notices a group of workers down the walkway who have suddenly blocked her path, and she makes a quick stop in 1.8 seconds. What is Suzies average acceleration
A rescue helicopter lifts a 90-kg person straight up by means of a cable, What is the tension in the cable and How much work is done by the tension in the cable
A 3.10 kg steel ball strikes a wall with a speed of 10 m/s at an angle of 60 ° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.190 s, what is the average force exerted on the ball by th..
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