Answer:
The potential difference across the source is 30.45 V.
Explanation:
In this setup we have a voltage divider, we were given the voltage difference on one of the resistors, we know that the difference pottential from the source in this case is the sum of the voltage in each individual resistor, so we can use the following equation to solve this problem:
V_resistor5.4 = (V_source)*(R_5.4)/(R_5.4+R_8.3)
V_source = (V_resistor5.4)*(R_5.4+R_8.3)/(R_5.4)
V_source = (12)*(5.4+8.3)/5.4
V_source = (12)*(13.7)/5.4 = 30.45 V
he potential difference across the source is 30.45 V.
Answer:
power will three times decrease (one-third)
Explanation:
P = W / t
thus when work is constant, power is inversely proportional to time
so, when time is tripled, power is decreased to one-third
Last choice: It's inversely proportional. So if you move the plates farther apart, the capacitance decreases.
Answer;
-Exothermic reaction;
-The sign of the energy change is negative (-)
Explanation;
2CuO(s) + C(s) --> 2Cu(s) + CO2(g)
ΔH = ΣΔHf(products) - ΣΔHf(reactants)
ΔH = -393.5kJ - 2(-155.2kJ) = -83.1 kJ
The reaction is exothermic.
-An exothermic process or reaction releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings.