You short-circuit a 20 volt battery by connecting a short wire from one end of the battery to the other end. if the current in the short circuit is measured to be 15 amperes, what is the internal resistance of the battery? (b) what is the power generated by the battery? w(c) how much energy is dissipated in the internal resistance every second? (remember that one watt is one joule per second.)w(d) this same battery is now connected to a 11 resistor. how much current flows through this resistor? a(e) how much power is dissipated in the 11 resistor? w(f) the leads to a voltmeter are placed at the two ends of the battery of this circuit containing the 11 resistor. what does the meter read? v

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

there are no atoms

friction

explanation:

they us to move forward and backwards