Answer:
The correct answer is: 0°C + 0°C = 32°F
Explanation:
We need to remember the conversion equation from Celsius to Fahrenheit:
In our case x = 0, then y will be:
Now 0°C + 0°C is just 0°C because if we add a body at a certain temperature to another body with the same temperature the total temperature will the same.
Then, knowing that 0°C = 32°F we can conclude that:
I hope it helps you!
Answer:
The number of excess electrons are on the negative surface is
Explanation:
Given that,
Distance =1.5 cm
Side = 22 cm
Electric field = 18000 N/C
We need to calculate the capacitance in the metal plates
Using formula of capacitance
Put the value into the formula
We need to calculate the potential
Using formula of potential
Put the value into the formula
We need to calculate the charge
Using formula of charge
Put the value into the formula
Here, the charge on both the positive and negative plates
We need to calculate the number of excess electrons are on the negative surface
Using formula of number of electrons
Put the value into the formula
Hence, The number of excess electrons are on the negative surface is
Answer:
The cost of running the electric water heater for one year is 55.2391 $
Explanation:
The simple rule of 3 helps to quickly solve proportionality problems when you have three known values and one unknown. If two quantities are directly proportional (that is, when multiplying or dividing one of them by a number, the other is multiplied or divided respectively by the same number) the rule of three can be applied as follows:
a ⇒ b
c ⇒ x
So:
where a, b and c are the known values and x is the value you want to find out.
In this case, you can first apply the following rule of three: if 2.5 kW are consumed in 1.9 hours, in 1 hour how many kW are consumed?
kWh=1.316
So an electric water heater consumes 1.316 kWh in one day. You apply another simple rule of three: if the heater in 1 day consumes 1.316 kWh, in 365 days (1 year) how many kWh are consumed?
kWh= 480.34
So an electric water heater consumes 480.34 kWh in a year.
If 1 kWh costs 11.5 cents, 480.34 kWh how many cents does it cost?
cost= 5,523.91 cents
Finally, if 100 cents is equal to 1 dollar, 5,523.91 cents, how many dollars are equal?
cost= 55.2391 $
<u><em> The cost of running the electric water heater for one year is 55.2391 $</em></u>