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a vector has an x-component ofnbsp -215 units and a y-component of 350 units find the magnitude and direction of the
a motorist travels at a constant speed of 355 ms through a school zone exceeding the posted speed limit a policeman
a man in a maze makes three consecutive displacements his first displacement is 600 m westward and the second is 160 m
three point charges are arranged along the x-axis charge q1 -485 nc is located at x1 0205m and charge q2 275 nc is at
a 4500 kg helicopter accelerates upward at 20ms2 what lift force is exerted by the air on the
a crowbar 2m long is used to lift a rock 800n if the fulcrum is 025m from where the crowbar touches the rock how much
a 4 kg wooden block is at rest on a tabletop a 003 kg bullet enters the block going at 800 ms it passes through the 02
a concave mirror produces an upright virtual image that is 300cm times taller than the object the focal length is 150cm
an elevator with a mass 2000kg rises with an acceleration of 1ms2 what is the tension in the supporting
a pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam we receive
a 50 microc point charge is placed in an external uniform electric field of 160 104 nc at what distance from the charge
a dolphin leaps out of the water at an angle of 361 deg above the horizontal the horizontal component of the dolphins
an electric heater is used to heat a room of volume 66 m3 air is brought into the room at 5degc and is completely
the earth is constantly being bombarded by cosmic rays which consist mostly of protons assume that these protons are
the soccer goal is 2178 m in front of a soccer player she kicks the ball giving it a speed of 1869 ms at an angle of
the threshold or cut-off frequency for sodium is 440x10 14 hz it is subjected to radiation of frequency 900x10 14 hz
two football players are initially 2m apart at the same instant they accelerate towards each other each at different
a 20 kg projectile is fired at an angle of 600 to the horizontal with an initial velocity of 16 x 102 ms at the highest
the venturi tube may be used as a fluid flowmeter suppose the device is used at a service station to measure the flow
a hospital patient has been given 131-i half-life 804 days which decays at 62 times the acceptable level for exposure
1 an electron accelerates from rest through a potential difference of 182 vwhat is its final speed ms2 an electron that
you are arguing over a cell phone while trailing an unmarked police car by 260 m both your car and the police car are
a sled is resting on packed snow the coefficient of kinetic friction is now only 012 if a person weighing 650 n sits on
you select a rental package that includes a car with an average consumption of 600 rm liters of fuel per 100 rm km
a corner reflector is made from a triangular prism with an index of refraction of n254 in a right angle 45 45 90