What are some examples of joules?
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What are some examples of joules?
Total energy = 30 j/s x 18000 s = 5.4 x 105 j. So how much energy is saved every day using the compact florescent bulb? Take the difference between the energy used by the two different light bulbs: 1.8 x 10 6 j – 5.4 x 105 j = 1.3 x106 j.
What is the relationship between a KiloJoule and a joule?
Joules and KiloJoules are units of the international system of units (SI) that measure energy. The standard symbol for Joule is J, whereas the symbol for KiloJoule is KJ. 1 J equals precisely 0.001 KJ, therefore there are 1,000 Joules in a KiloJoule.
What is equivalent to a joule?
One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). One newton equals a force that produces an acceleration of one meter per second (s) per second on a one kilogram (kg) mass. Therefore, one joule equals one newton•meter.
What can a KJ do?
A kilojoule (or Calorie) is a unit of energy. In Australia, we use kilojoules (kJ) to measure how much energy people get from consuming a food or drink. The kilojoule content of foods depends on the amount of carbohydrates, fats and proteins present in the food, and the portion size.
What is joules for kids?
A joule refers to the amount of energy transferred to an object when a force of 1 newton is applied on it over a distance of 1 metre (1J = 1N × 1m). It is related to the watt (a unit of power): one watt equals one joule per second.
Which is more joules or kilojoules?
One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter. The kilojoule is a multiple of the joule, which is the SI derived unit for energy.
What smaller a joules or kilojoules?
Thus, a kiloJoule (kJ) is 1000 Joules and a megaJoule (MJ) is 1,000,000 Joules. A related unit is the Watt, which is a unit of power (energy per unit time).
What is kilojoules on Apple Watch?
When monitoring your health and fitness, the Apple Watch and iPhone both have ways of setting your preference for either Calories or kilojoules (kJ) burned. We typically uses Calories (with a capital “C”) to denote the energy the body has burned. Or the available energy in food items.
How many kJ should a child eat?
How many calories do teenagers need?
| Age | Boys | Girls |
|---|---|---|
| 14 | 11,000kJ or 2,629kcal | 9,800kJ or 2,342kcal |
| 15 | 11,800kJ or 2,820kcal | 10,000kJ or 2,390kcal |
| 16 | 12,400kJ or 2,964kcal | 10,100kJ or 2,414kcal |
| 17 | 12,900kJ or 3,083kcal | 10,300kJ or 2,462kcal |
What is an example of a Joule?
Joule Examples. To put the joule into a practical context: One joule is the kinetic energy of a tennis ball moving 6 meter per second. A joule it the amount of energy needed to life a medium tomato up one meter or is the energy release when dropping that same tomato from a height of one meter. A joule is the amount of electricity needed…
What is the kinetic energy of a Joule?
A joule is equal to the kinetic energy of a kilogram mass moving at the speed of one meter per second (one joule is a kg⋅m 2 ⋅s −2 ). Alternatively, it is the amount of work done on an object when a force of one newton acts in the direction of the object’s motion over a distance of one meter…
What are kilojoules and how much energy do they provide?
The food and drinks we eat provide energy, which is measured in kilojoules. How much energy they provide depends on the amount of carbohydrate (sugars/starch), protein, fat and alcohol the food or drink contains, as well as the portion size. Different ingredients in food and how they are prepared mean some have more kilojoules than others.
What is the difference between Joule and Newton?
The joule was now no longer defined based on electromagnetic unit, but instead as the unit of work performed by one unit of force (at the time not yet named Newton ) over the distance of 1 metre. The joule was explicitly intended as the unit of energy to be used in both electromagnetic and mechanical contexts.