The <u><em>voltage</em></u> at the input to the hair dryer is
V = (current) · (resistance)
V = (15 A) · (8 Ω)
<em>V = 120 volts</em>
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The <em><u>power</u></em> dissipated by the hair dryer is
P = (current)²· (resistance)
P = (15 A)² · (8 Ω)
<em>P = 1800 watts </em>
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Kinetic energy is the energy of an object that is moving. It is calculated from one-half the product of the mass and the change in square of the velocity of the object. It is the opposite of potential energy which the energy possessed by an object at rest. We calculate as follows:
KE = mΔv^2 / 2 = 45 ( 6^2 - 12^2 ) = -4860 J had been lost by the skater
Total distance is 70 meters and the Resultant displacement is 50 meters.
Electrostatic force between two sphere is given by
here we know that
r = 0.60 m
F = 10.8 N
now we will have
since the two charges are attracting each other so here the two charges must be opposite in nature
now we will use
by solving above equation we will have
now the force between two sphere when connected by wire is to be determine
so here we have net charge on each sphere is half of total charge
so we will have
so force now is given as
this is repulsive force between two charges
T1 = 273 + 22 = 295 Kelvin
T2 = 273 + 4 = 277 Kelvin
V1 = 0.5 liters,
now , we just need to input this to the vormula
295/0.5 = 277/V2
590 = 277/V2
V2 = 590/277
= 2.129 Liter
hope this helps
