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A horrifying room contains 1000 really stupid flies. This room has dimensions of3m X 3m X 3m, and it has one open window with dimensions of 1m X 0.5m. The thickness of the window frame (the distance from the inside of the room to the outside) is 30cm. The flies buzz around with a constant speed of 2 m/s, and they fly in straight lines until they bump into each other or a wall. They bump into each other or the wall after traveling 0.5m. After the collision they fly off in a random direction. Outside the room there are essentially no flies. At what rate (flies/s) would you expect the flies to be exiting the room through the window?
Recall the relation between angular and linear acceleration! After 0.5 sec by what angle has the disk spun and what is its angular speed at that moment.
What is the mass of the heaviest book this person can hold onto vertically before it slips out of his or her fingers? The coefficient of static friction of the surface between the fingers and the book cover is 0.65. Answer is not 0.397 kg.
The quantity of charge q (in coulombs) that has passed through a surface of area 1.92 cm2 varies with time according to the equation q = 4t3 + 5t + 6, What is the instantaneous current through the surface at t = 1.02 s
Find the flow rate of sludge and thickened sludge, salt concentration, water flow rate and pumping rate of a reservoir.
two large parallel conducting plates are 12 cm apart and have charges of equal magnitude and opposite sign on their
A dropped rubber ball hits the floor with a speed of 8.0 m/s and rebounds to a height of 0.25 meter. Determine what fraction of the initial kinetic energy was lost in the collision
In a certain toy telescope front lens (the objective lens) has a focal length of 75 mm and the objective lens has a focal length of 10 mm. What is the magnification of the telescope
wo small identical conducting spheres are placed with their centers 0.65 m apart. Find the electrostatic force exerted on one sphere by the other
A uniform aluminium rod in the shape of a long cylinder of initial length of 4 meters and a radius of 0.01 m is clamped in place at one end and is pulled with a machine parallel to its length at the other end. If the density does not charge, is it po..
A 60 kg person jumps from rest off a 5m high tower straight down into the water. obtain the average force that the water exerts on the diver
Consider a 53-cm-long lawn mower blade rotating about its center at 3400 rpm. Calculate the linear speed of the tip of the blade
How massive an object can be supported by a 6.0cm -diameter suction cup mounted on a vertical wall, if the coefficient of friction among cup and wall is 0.64? Suppose normal atmospheric pressure.
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