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If the rubber of the balloon itself has a mass of 2.00g and the balloon is filled with helium (density 0.166kg/m^3 ), calculate the net upward force (the "lift") that acts on it in air. Express your answer with the appropriate units.
Two test charges are located in the x-y plane. If q1 = -2.30 nC and is located at x = 0.00 m, y = 1.040 m and the second test charge has magnitude of q2 = 4.00 nC and is located at x = 1.20 m, y = 0.750 m, calculate the x and y components
On a humid day, an electric field of 2.00 * 10^4 N/C is enough to produce sparks about an inch long. Suppose that in your physics class, use Coulomb's law to calculate the electric field at the surface of the sphere
An airplane starting from airport A flies 280 km east, then 365 km at 29.0° west of north, and then 130 km north to arrive finally at airport B.
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotati..
An electromagnetic wave in a vacuum has an instantaneous magnetic field strength of 0.000000735 T at a certain point. What is the instantaneous electric field strength of the wave at this point
Three +3.0-?C point charges are at the three corners of a square of side 0.50 m. Find the magnitude of the electric field at the center of the square
According to one set of measurements, the tensile strength of hair is 196MPa , which produces a maximum strain of 0.380 in the hair. What is the magnitude of the force giving this tensile stress
A 130 horizontal beam is supported at each end. A 310 piano rests a quarter of the way from one end. What is the vertical force on each of the supports
A spring gun is used to launch a metal ball horizontally from a height h1=75.0cm above the floor, What is the height h2 of this taller table
A 1.50 ? 103-kg car starts from rest and accelerates uniformly to 16.5 m/s in 12.4 s. Find the average power developed by the engine
An air bubble has a volume of 1.49 cm3 when it is released by a submarine 110 m below the surface of a lake. What is the volume of the bubble when it reaches the surface
A rectangular loop of wire carrying a 4.0-A current is placed in a magnetic field of 0.60 T. What is the area of this loop
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