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A 25 resistor is connected across a 120 source. The resistor is then lowered into an insulated beaker, containing 1.0 of water at 19, for 90 sec
What is the final temperature of water?
The cone of a loudspeaker vibrates in SHM at a frequency of 262 Hz. The amplitude at the center of the cone is xm = 1.5 x 10-4m, What is its maximum velocity and acceleratio
Three blocks of mass m1=1.0 kg, m2=2.0 kg, and unknown mass m3 are on a frictionless forizontal surface, What is the unknown mass m3
In coming to a stop, a car leaves skid marks 76 m long on the highway. Assuming a deceleration of 6.50 m/s2, estimate the speed of the car just before braking. Express in m/s.
An airplane goes North with an average speed of 100m/s, What is the plane's velocity relative to the ground
A plane, diving with constant speed at an angle of 49.0° with the vertical, releases a projectile at an altitude of 560 m. The projectile hits the ground 6.00 s after release. What is the speed of the aircraft
If a car travelling at 52 km/h will skid 18 m when its brakes lock, how far-off will it skid if it is travelling at 120 km/h when its brakes lock.
Two long, straight parallel wires are separated by a distance of 21.1 cm. What is the magnitude of the resulting magnetic field at apoint that is 12.1 cm from each wire
A train is travelling up a 4.0 incline at the speed of 3.25 when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentarily.
A factory worker pushes a 30.0kg crate a distance of 4.4 m along a level floor at constant velocity by pushing downward at an angle of 31 below the horizontal. What is the total work done on the crate
ocean waves with wavelength 1.2 m and period 1.5s are moving past a pier. a boy runs along the pier, in the direction opposite to the motion of the wave, at 3.5 m/s. how many wave crests pass the boy each second?
A 5C charge moves with velocity v = 10i + 3 j - 7 k m/sec in magnetic field B = 5i+ 13j - 1k tesla. find directions of magnetic force on the moving charge
A small sphere with mass 2.60g hangs by a thread between two large parallel vertical plates 5.00cm apart. The plates are insulating and have uniform surface charge densities and . The charge on the sphere is = 8.70×10?6C . What potential differenc..
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