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Find the coefficient of kinetic friction between a 4.55-kg block and the horizontal surface on which it rests if a 93.0-N/m spring must be stretched by 6.30 cm to pull it with constant speed. Assume that the spring pulls in the horizontal direction.
an air-filled parallel plate capacitor with a plate spacing of 1.20 cm has a capacitance of 4.20 uf. the plate spacing
As the earth rotates, what is the speed of a physics student in Miami, Florida, at latitude 26°? What is the speed of a physics student in Fairbanks
A player bounces a 0.47 kg soccer ball off her head, changing the velocity of the ball from i = (9.2 m/s) + (-2.7 m/s) to f = (6.1 m/s) + (5.5 m/s). The ball is in contact with the player's head for 6.70ms.
You have a spring attached to the bottom of a container. The spring is aligned vertically. The container is filled with water (density 1.0 x 103 kg/m3). How much does the block compress the spring
A lead ball is dropped into a lake from a diving board 5.0 mabove the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.0 s after it is..
An electric dipole lies on the x-axis, consisting of a -2.7nC charge at x = -11cm and a +2.7nCcharge at x = 11cm. Find the magnitude of the electric field
A chair of weight 85.0N lies atop a horizontal floor; the floor is not frictionless. Using Newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair
An elevator with a mass 2000kg rises with an acceleration of 1m/s^2. What is the tension in the supporting cables
A microscope has a 2.5-cm focal length eyepiece and a 0.90 cm objective. Assuming a relaxed normal eye. Compute the total magnification. Compute the position of the object if the distance between the lenses is 20.5cm.
A child of mass 28.0 kg is sliding on ice with a velocity of 2.25 m/s in the positive x direction. She is holding a 2.4 kg ball in her hand. She throws the ball straight ahead of her with a velocity of 2.70 m/s (in the + x direction.) What is her ..
A laser beam is reflected by a plane mirror. It is observed that the angle between the incident and reflected beams is 22 degrees.If the mirror is now rotated so that the angle of incidence increases by 5.0 degrees, what is the new angle between t..
The length of the B string on a certain guitar is 62.0 cm. It vibrates at a fundamental frequency of 246.0 Hz. what should the tension be when the string is in tune
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