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The weight of a book was measured using a scale. The scale showed 15N. Next, the book and the scale were placed in an elevator that does not show the floor number. When the elevator started moving, the reading of the scale has changed, but later was reading 15N again. Using the fact that the scale shows the same value in the elevator, can you tell if the elevator is moving upward or downward? What kind of information would you need to make that assessment? Explain
An object is dropped from rest from a height of 3.9 107 m above the surface of the Earth. If there is no air resistance, what is its speed when it strikes the Earth
It takes 2.40 s for a small ball with a mass of 0.120 kg released from rest from a tall building to reach the ground. Calculate the height from which the ball is released
A 71-kg skier is going down a slope oriented 32° above the horizontal. Determine the pressure that each skier exerts on the snow
a major-league pitcher can throw a baseball in excess of 45.7 ms. if a ball is thrown horizontally at this speed how
A satellite viewing a surface location under cloud free conditions measures a 12um radiance of 6.2 W m^-2um^-1sr^-1. Compute the brightness temp Tb.
You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. If you catch the ball, with what speed do you and the ball move afterwards
Two charges repel each other with a force of 10-6 Nwhen they are 10 cm apart. Find the forces between the samecharges when they are 2 cm and 20 cm apart
A pronghorn antelope has been observed to cover 1.60 km with an average speed of 67.0 km/h. The antelopes speed during the first half of the distance is 88.0km/h. find the antelopes speed during the second half of its run
A force vector points at an angle of 50.4° above the +x axis. It has a y component of +289 Newton's. Calculate the magnitude of the force vector
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
Nicole throws a ball straight up. Chad watches the ball from a window 5.80 above the point where Nicole released it. How fast did Nicole throw the ball
Considered frequency and draw the nodal maps
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