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A football is kicked 50.4 meters. If the ball is in the air 4.54 s, with what initial velocity was it kicked?
A plate carries a charge of -4 ?C, while a rod carries a charge of 2.50 ?C. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?
Find the speed of the car when brakes were applied.
What differences exist between Bohr model and the modern theory of an atom and what major flaw is built-in to the Bohr model of the atom
A 80 bike racer climbs a 1500 -long section of road that has a slope of 4.3 degrees. By how much does his gravitational potential energy change during this climb
A 200 gm block of metal is heated to 100 degrees Celcius in boiling water. This block is after placed in an aluminum calorimeter cup (mass - 30gm; c - .22 cal/g degrees C) containing 180 gm of water at 20 degrees C.
how much time in seconds will it take the officer. A 63 resistor is connected in parallel with a 115.0 resistor. This parallel group is connected in series with a 19 resistor. The total combination is connected across a 15.0 V battery. Find the cur..
The membrane that surrounds a certain type of living cell has a surface area of 4.4 x 10-9 m2, The potential on the outer surface of the membrane is +52.2 mV greater than that on the inside surface. How much charge resides on the outer surface
A uniform rod of mass 3.05×10^-2?2kg and length 0.370m rotates in a horizontal plane about a fixed axis through its center, compute the angular speed of the rod after the rings leave it
a vector representing 170 n is oriented at 32 degrees with the horizontal. what is the magnitude of its horizontal
A styrofoam box used to keep drinks cold at picnic has total wall area(including the lid) of 0.80m2 and wall thickness 2 cm. it is filled with ice, water and cans at 0 Celsius. What is the rate of heat flow into the box if temperature of the outsi..
A baseball approaches home plate at a speed of 46.0 m/s, moving horizontally just before being hit by a bat. What is the average vector force the ball exerts on the bat during their interaction
You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. This monument rises to a height of 192 m. You estimate your line of sight with the top of the arch to be 4.5° above the horizontal. Approxim..
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