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A drop of water on a countertop reflects light from a flower held 3.6cm directly above it. The flower's diameter is 2.2cm, and diameter of the flower's image is 0.14cm. What is the focal length of the water drop, assuming that it might be treated as a convex spherical mirror?
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 26.7 m/s. Find the airplane\'s acceleration
a generator has a dome of radius 2.0 m. a motor causes a charged insulating belt to travel continuously between
A speeder is racing down the road at a constant speed of 90mi/h. A police officer is having coffee while the speeder zips past her. How Far down the road does the officer catch the speeder
A horse drags a 100 kg sled a distance of 4 km in 20 minutes. What is the coefficient of sliding friction between the sled and the ground
At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 1.8 m/s2. How fast will the automobile be traveling at that instant
A stone is thrown horizontally at 70.0 m/s from the top of a very tall cliff. Calculate its horizontal position and vertical position at 2.00 s intervals for the first 10.0s
A person travels by car from one city to another. She drivesfor 21.1 minat 66.4km/h, 14.3min at 86.1km/h, 51.4at 46.8km/h, Determine the distance between the cities along this route
A dc motor is connected to a constant emf of 13.9 V. The resistance of its windings is 2.0 ?. What current does it draw at normal operating speed
a wire is 1.2 m long and has a mass of 0.027 kg. the wire is stretched between two points and when driven by an
a soccer ball is kicked from the ground with an initial speed of 19.6 ms at an upward angle of 33.4deg. a player 60 m
A charge +q is at the origin. A charge -2q is at x = 9.10 m on the +x axis. (a) For what finite value of x is the electric field zero? (b) For what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V =..
Two point charges totaling 7.00 µC exert a repulsive force of 0.100 N on one another when separated by 0.719 m. What is the charge on each? smallest charge largest charge (b) What is the charge on each if the force is attractive? smallest charge l..
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