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a water droplet 10-2cm diameter caries a negative charge such that electric field at its surface is 60000v/m how strong vertical field is required to keep to the droolet from falling
the period of a pulsating variable star may be estimated by considering the star to be executing radial longitudinal
a bird lands on a bare copper wire carrying a current of 33 a. the wire is 8 gauge which means that its cross-sectional
water drips from the nozzle of a shower onto the floor 203 cm below. the drops fall at regular equal intervals of time
Show that an extremal path is never that of a local maximum for the action. ("Local" means relative to nearby paths). Find an example in which an extremal path is that of a local minimum for the action.
A mass m = 4.4 kilogram is attached to a vertical spring with k = 202 N/m and is set into motion. Evaluate what is the frequency of the oscillation
q1. while exploring a cave a spelunker starts at the entrance and move the lowing distances. she goes 75.0m north 250m
Two resistors by values of 27Ω and 19Ω,respectively, are connected in series and hooked to a 12Vbattery. How much current is in the circuit? How much power is expended in the circuit?
Assume light coming from the air strikes a rectangular slab of material with index of refraction 2.5 and incident angle 60 degrees. At what angle from the normal will it leave the other side of the material?
the drive chain in a bicycle is applying a torque of .850 Nm to the wheel of the bicycle. What is the angular acceleration of the wheel
An 91-g arrow is fired from a bow whose string exerts an average force of 100N on the arrow over a distance of 82cm
What are the magnitude and direction of the net force. how long does it take for the police car to catch up with the speeder.
A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, How long are her feet in the air
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