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Three charges make a triangle. Q1 is a 50 uC charge at the origin. Q2 is a -86 uC charge at (.52 m, 0). Q3 is a 65 uC charge at (0, .3). what is the total force on Q3?
Now a peg is placed 4/5 of the way down pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its starting po..
A circuit contains six 290 lamps and a 18 heater connected in parallel. The voltage across the circuit is 120V. If the circuit has a 11A fuse, will the fuse melt if all the lamps and the heater are on.
what time delay Delta t is necessary. A boxcar of mass 600 tons at rest becomes uncoupled on a 5.00 grade. If the track is considered to be frictionless, what speed does the boxcar have after 15 seconds.
A 2.80 kg gold bar at 98 degrees celcius is dropped into 0.34 kg of water at 23 degree celcius. what is the final temperature? assume the specific heatof gold is 129 J/kg
At what angle to the surface must a submerged diver in the lake look toward the surface to see the setting sun just along horizon.
The pilot of an aircraft wishes to fly due west in a 33.10 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190 km/h what must its speed relative to the ground be.
A Volleyball is spiked so that it has an initial velocity of 15 m/s directed downward at an angle of 55 degrees below the horizontal. Find the horizontal component of the ball’s velocity when the opposing player fields the ball?
If a 37.2N horizontal force must be applied to slide a 15.8kg box along the floor at constant velocity what is the coefficient of sliding friction between the two surfaces.
Consider the same situation, but now let the initial speed v_0 of first ball be given and treat the height h of the building as an unknown. What should the height of the building be for both balls to reach the ground at the equivalent time for v_0..
A 282 kg log is pulled up a ramp by means of the rope that is parallel to the surface of the ramp. The ramp is inclined at 23.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.87, and the log has..
If the maximum acceleration the vehicle's brakes are capable of is -5 m/s2, what is the maximum reaction time of the motorist that would allow her or him to avoid hitting the deer.
If a car traveling at 66 km/h will skid 20 m as its brakes lock, how far will it skid if it is traveling at 120 km/h when its brakes lock.
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