Answer:
Current through them, voltage across them.
Explanation:
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
A resistor can be defined as an electronic component that opposes the free flow of current from one point to another in an electrical circuit.
In a series circuit of two resistors, the resistors have the same current through them; in a parallel circuit of two resistors, the resistors have the same voltage across them.
If they're sitting in a chair, blood is never going to pool in their brain/head
The amount of energy needed to increase the temperature of a substance by
![\Delta T](https://tex.z-dn.net/?f=%5CDelta%20T)
is given by:
![Q=m C_s \Delta T](https://tex.z-dn.net/?f=Q%3Dm%20C_s%20%5CDelta%20T)
where
m is the mass of the substance
![C_s](https://tex.z-dn.net/?f=C_s)
is the specific heat capacity of the substance
![\Delta T](https://tex.z-dn.net/?f=%5CDelta%20T)
is the increase of temperature
In our problem,
![m=755 g](https://tex.z-dn.net/?f=m%3D755%20g)
, while
![\Delta T=403 K-283 K=120 K](https://tex.z-dn.net/?f=%5CDelta%20T%3D403%20K-283%20K%3D120%20K)
and the specific heat capacity of iron is
![C_s =0.45 J/gK](https://tex.z-dn.net/?f=C_s%20%3D0.45%20J%2FgK)
if we plug these numbers in the equation, we find the amount of energy needed: