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A 24-hp electric motor provides power for the elevator in a 6 story building. If the total weight of the loaded elevator is 2200 lb, how long a time does it take to rise 96ft from the first to the sixth floor?
A small piece of dust of mass m = 2.5 µg travels through an electric aircleaner in which the electric field is 447 N/C. The electric force on the dust particleis equal to the weight of the particle. What is the charge on the dustparticle?
A pump uses a piston of 15 cm diameter which moves 2 cm/s. What is the fluid velocity of a tube 3mm in diameter
The radius of the hydrogen atom is 0.053 nm. find the Coulomb force between the electron and the proton in the atom
A 15m length of wire consists of 6.0m of copper followed by 9.0m of aluminum, both diameter 1.4mm. A voltage difference of 70mV is placed across the composite wire, What is the total resistance (sum) of the two wires
Just by the impact, the clay has speed v0 = 9 m/s, and the disk is rotating clockwise with angular speed w0 = 0.4 rad/s. Just following the impact, what is an angular speed of the combined system of wheel plus clay.
A 0.70kg piece of lead at a temperature of 160C is dumped into 800mL of water at a temperature of 22C , How much heat flowed in this process
What is true of the net force when 3 or more forces are in a state of equilibrium, and If a force (F) make an angle (theta) with the x-axis, what are the formulas used to the x and y components of this force
If the value of the linear charge density is ? = 40.5 ?C/m and the distance between the two cables is D = 40.5 m, calculate the electric field midway between the two cables
During a very quick stop, a car decelerates at 7.2 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires, How long does the car take to stop completely in seconds
a velocity selector has its electric field directed vertically downward with magnitude 130nc .a find the magnitude of
a uniform electric field of magnitude 7.5times105 nc points in the positive x direction.find the change in electric
A fisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. What is the amplitude of each wave
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