Radio, microwaves, infrared, and visible light are all used for communications.
Answer:
1.48 kg
Explanation:
mass of copper = 4 kg
Decrease in temperature of copper = 36.9°C
increase in temperature of water = 9.20°C
Let the mass of water is m.
Specific heat of water = 4181 J/Kg°C
Specific heat of copper = 385 J/kg°C
According to the principle of caloriemetery
Heat lost by copper = heat gained by water
mass of copper x specific heat of copper x decrease in temperature = mass of water x specific heat of water x increase in temperature
4 x 385 x 36.9 = m x 4181 x 9.20
56826 = 38465.2 m
m = 1.48 kg
Thus, the mas of water is 1.48 kg.
mas of water
C: if it senses unequal currents
For a given resistance value or for a given capacitance value, the time rate at which a capacitor is charged or discharged is affected.
Therefore, the product of the value of the resistance for the value of the capacitance is what is called the "time constant"
It is represented with the Greek letter "tau" τ
τ=R*C