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A roller coaster, loaded with passengers, has a mass of 2,000 kg; the radius of curvature of the track at the TOP point before the dip is 24 m. If the vehicle has a speed of 18 m/s at this point, what force is exerted on the vehicle by the track?
The plates of a parallel-plate capacitor each have an area of 0.1 m2 and are separated by a 0.6 mm thick layer of paper. The capacitor is connected to a 13 V battery. (The dielectric constant for paper is 4.)
A rubber ball of mass 27.5 g is dropped from a height of 1.85 m onto a floor. What impulse was applied to the ball during the collision
An object is located 12.5 cm in front of a convex mirror, the image being 6.90 cm behind the mirror. How far in front of the mirror is the second object located
A 1200N uniform boom at 65 to the horizontal is supported by a cable at an angle of 25. The boom is pivoted at the bottom, find the tension in the supported cable
Suppose you decide to travel to a star 85 light-years away at a speed that tells you the distance is only 10 light-years
what is the rate of heat transfer from the plate to the air? If the free stream velocity if the air is doubled and the pressure are increased to 10 atm, what is the rate of heat transfer.
A box of mass m slides across a horizontal table with coefficient of friction ? . Find the acceleration of the system
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 3.45 × 10-11 m. Determine the magnitude..
A machine is driven by a series of gears. The first gear has 12 teeth and rotates 25.0 times per minute. How many teeth does it have
The electron beam inside a television picture tube is 0.4 mm in diameter and carries a current of 55 µA. What is the power delivered to the screen by the electron beam
question1a 0.225kg sample of tin originally at 97.5 degrees c is dropped into 0.115kg of water firstly at 10.0 degrees
On a safari, you are spearfishing while wading in a river. You observe a fish gliding by you. If your line of sight to the fish is 64.0° below the horizontal in air, and suppose the spear follows a straight-line path through the air and water afte..
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