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Oxygen gas can be produced by decomposing potassium chlorate using the reaction below. If 138.6 g of KClO3 is heated and decomposes completely, what mass of oxygen gas is produced?
In an interstellar gas cloud at 50 K, the pressure is 1.00 x 10-8 Pa. Assuming that the molecular diameters of the gases in the cloud are all 20 nm. Find what is their mean free path
The following objects are released simultaneously from rest at the top of a 1.50m long ramp inclined at 3.50? to the horizontal: Which wins the race
A skateboarder shoots off a ramp with a velocity of 6.6 m/s,directed at an angle of 58° above the horizontal. The end ofthe ramp is 1.2 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take a..
A contact lens is made of plastic with an index of refraction of 1.48. The lens has an outer radiusof curvature of +1.97 cm and an inner radius of curvature of +2.58 cm. What is the focal length of the lens?
What is the coefficient of static friction among the coin and the turntable? Express your answer using two significant figures.
Three equal point charges, each with charge 1.70 µC, are placed at the vertices of an equilateral triangle whose sides are of length 0.450m. What is the electric potential energy U of the system
The belt shown moves over two pulleys without slipping. At the instant shown the pulleys are rotating clockwise and the speed of point B on the belt is 12 ft/s, increasing at the rate of 96 ft/s. Determine, at this instant,
A proud deep-sea fishermen hangs an 61 kilogram fish from an ideal spring having negligible mass. The fish stretches the spring 0.130 meter. Estimate the maximum speed it will reach
a 296 g bird flying along at 6.57 ms sees a 8.8 g insect heading straight toward it with a speed of 34.87 ms. the bird
An underwater scuba diver sees the Sun at an apparent angle of 48.0° above the horizon. What is the real elevation angle of the Sun above the horizon?
q1. a submarine is 306 m horizontally out from a shore and 120 m beneath the surface of the water. a laser beam is sent
A stone is thrown at an angle of 30the degrees above the horizontal from the top edge of a cliff with an initial speed of 12the m/s. What is the height of the cliff
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