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A 4.9 kg block is initially at rest on a horizontal frictionlesssurface when a horizontal force in the positive direction ofan x axis is applied to the block. The force isgiven by (x) = (2.8- x2) N, where x is inmeters and the initial position of the blockis x = 0. (a) What is the kinetic energy of the block as it passesthrough x = 2.8m? (b) What is the maximum kinetic energy of the block between x = 0and x = 2.8 m?
Two 29.0%u2212cm -focal-length converging lenses are placed 14.0cm apart. An object is placed 39.0cm in front of one lens. Where will the final image formed by the second lens be located
The circular top of a can of soda has a radius of 0.029m. The pull-tab has an area of 4.13 10-4m2. The absolute pressure of the carbon dioxide in the can is 1.4 x10^5Pa. Find out the force that this gas generates.
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 84.4, Calculate the weight of the rod
An electron moving along the x axis has a position given by x = 20te-4t m, where t is in seconds. How far is the electron from the origin when it momentarily stops
A 5-kg fish swimming 1 m/s swallows an absentminded 1-kg fish swimming toward it at a speed that brings both fish to a halt immediately after lunch. What was the speed of the smaller fish
q1. a 2700-kg satellite is in a circular orbit around a planet. the satellite travels with a constant speed of 6270 ms.
On an essentially frictionless horizontal ice-skating rink, a skater moving at 3.1m/s encounters a rough patch that reduces her speed by 42% to a friction force that is 24% of her weight
When the power is turned off on a turntable spinning at 71.0 rpm , you find that it takes 12.6 revolutions for it to stop while slowing down at a uniform rate. find the angular acceleration (in rad/s^2 ), of this turntable
White light is the incident from air onto a transparent material at an angle of 40 degrees. What are the indices of refraction for the two colors
question1there is three vectors and another vector must be added to the following three vectors.a sketch a vector
On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.
assume that the tale applies a constant force of friction of 0.5 N block. if the block compresses the spring by 3cm after hitting it, what was the speed of the ball(hit spring)
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