# Question: How Do You Find The Joules?

## How many joules does it take to heat 1 Litre of water?

The energy needed E=SH times change in temperature times the total mass in grams(Which is 1000gram for a liter of water).

That gives you 4.184•79•1000 which is 330,536J, or 330.54KJ.

Kaiser T, MD.

To heat water takes 4.18 joules (or 1 calorie) per gram degree C..

## How many joules are in a Watt?

1 jouleThe most common unit is the watt (W), defined as 1 joule (J) of energy per second. A 40 W light bulb, then, uses 40 J of electrical energy every second to stay lit.

## How do you find Watts from Joules?

Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s).

## What is the formula of the kinetic energy?

EquationsEquationSymbolsMeaning in wordsK = 1 2 m v 2 K = \dfrac{1}{2}mv^2 K=21mv2K K K is translational kinetic energy, m is mass, and v is the magnitude of the velocity (or speed)Translational kinetic energy is directly proportional to mass and the square of the magnitude of velocity.1 more row

## What is the formula of potential energy?

The formula for potential energy depends on the force acting on the two objects. For the gravitational force the formula is P.E. = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 m / s2 at the surface of the earth) and h is the height in meters.

## How do you solve joules problems?

To calculate Joules of work, first you multiply the mass of the air conditioner (25kg) by acceleration, which in this case is gravity (9.8 m/s²). This gives you 245N of force, which you multiply by the distance you need to move the object (1.3 m). This gives you 318.5 Joules of work.

## What is the difference between potential and kinetic energy?

Kinetic and Potential Energy Difference The capacity to do work is called as Energy. This energy can be stored in different forms. … When an object is at rest, the body is said to possess potential energy. In another case, when the object is in motion, then it is said to possess kinetic energy.

## How many joules did the water absorb?

Example: If 10 kilograms of water are heated from 10 degrees Celsius to 50 degrees Celsius, how much energy (in joules) did they absorb? Answer: The specific heat capacity of water is (roughly) 4.184 kilojoules / kg K. (10 kg) × (40 degrees Celsius temperature change) × (4.184 kJ / kg K) = 1673.6 kilojoules.

## How do you find heat in joules?

To calculate the amount of heat released in a chemical reaction, use the equation Q = mc ΔT, where Q is the heat energy transferred (in joules), m is the mass of the liquid being heated (in kilograms), c is the specific heat capacity of the liquid (joule per kilogram degrees Celsius), and ΔT is the change in …

## How do you find kinetic energy from Joules?

In classical mechanics, kinetic energy (KE) is equal to half of an object’s mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

## How do you calculate joules to heat water?

The specific heat capacity of water is 4.18 J/g/°C. We wish to determine the value of Q – the quantity of heat. To do so, we would use the equation Q = m•C•ΔT. The m and the C are known; the ΔT can be determined from the initial and final temperature.