The temperature of an object is changed when heat is added to or extracted from it. determine the final temperature (in °c) of a 65.0 g mass of aluminum initially at 60.0°c if 1,050 j of heat energy is extracted from it. the specific heat of aluminum is 900 j/(kg · °c).

Explanation:

The heat extracted from the aluminium is given by:

where we have

Q = -1050 J is the heat extracted

m = 65.0 g = 0.065 kg is the mass

Cs = 900 J/kgC is the specific heat of aluminum

is the initial temperature

By solving for , we find the final temperature:

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.