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The weight of the atmosphere above 1 m^2 of Earth's surface is about 100,000 N. Density of course, become less with altitude. But suppose the density of air were a constant 1.2 kg/m^3. Calculate where the top of the atmosphere would be.
A shell is launched at 140m/s 56.0 degrees above the horizontal. find the maximum height about the ground that the projectile reaches
A 5.00 kg chunk of ice is sliding at 13.0 m/s on the floor of an ice-covered valley when it collides with and sticks to another 5.00 kg chunk of ice that is initially at rest. how high above the valley floor will the combined chunks go
The track near the top of your favorite roller coaster has a circular shape with a diameter of 29 m. What is the speed of the roller coaster
A stone has a mass of 9.00 x 10 ^-3 kg and is wedged into the tread of an automobile tire. The coefficient of static friction between the stone and each side of the tread channel is 0.70. determine the radius r of the tire
A system does 112 J of work on its environment and gains 72 J of heat in the process. What is the change in the internal energy of the environment
Two small metallic spheres, each of mass m = 0.180 g, are suspended as pendulums by light strings of length L, How long are the strings
An alpha particle and beta^ {-} particle, each with kinetic energy 35 {rm keV}, are sent through a 1.10 {rm T} magnetic field. The particles move perpendicular to the field. Find the curvature radius for alpha particle's trajectory. Hint: The kine..
A positive point charge q is fixed in position at the center of a square. A second point charge is fixed to corner B, C, or D. At which corner is the second charge located
You are to build a box whose height is 0.280 times its length. In order for the box to have a given volume while using a minimum amount of cardboard, what should be the ratio of the width of the box to its length.
Galaxy mergers in a rich cluster could impede their use as standard candles over time as they tend to brighten. What is the mean number density of galaxies within the half mass radius
Two charged bodies exert a force of .145N on each other. If they are now moved so they are one fourth as far apart, what force is exerted.
A 9.0-g piece of Styrofoam carries a net charge of -.65mC, What is the charge per unit area on the plastic sheet
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