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The Kinetic Energy Calculator uses the formula KE = (1/2)mv2, or kinetic energy (KE) equals one half of the mass (m) times velocity squared (v2). The calculator uses any two known values to calculate the third. Enter the units of measure for each value and the calculator converts among the units.

Kinetic Energy is the energy an object has owing to its motion. 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.

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We use Joules, kilograms, and meters per second as our defaults, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour, millimeters per second, etc.) could certainly be used as well - the calculation is the same regardless.

Use the calculator below to estimate electricity usage and cost based on the power requirements and usage of appliances. The amount of time and power that each appliance is used varies significantly between households, so for the best results, adjust the usage for each appliance to most accurately reflect your personal usage.

Watts (W) is a unit of power used to quantify the rate of energy transfer. It is defined as 1 joule per second. A kilowatt is a multiple of a watt. One kilowatt (kW) is equal to 1,000 watts. Both watts and kilowatts are SI units of power and are the most common units of power used. Kilowatt-hours (kWh) are a unit of energy. One kilowatt-hour is equal to the energy used to maintain one kilowatt of power for one hour. Generally, when discussing the cost of electricity, we talk in terms of energy. Energy (E) and power (P) are related to each other through time (t):

Electricity is most often measured and paid for based on the number of kilowatt-hours used. The reason that kilowatts-hours are typically used as a measurement of energy rather than watt-hours is simply because of scale: the amount of energy a typical household in the United States uses in a year is on the order of millions of watts, so it is easier to discuss in terms of kilowatt-hours instead.

British thermal units (BTU) are a measurement of heat used as part of the Imperial and US customary units of measurement. It is defined as the amount of heat that is required to increase the temperature of 1 pound of water by 1 degree Fahrenheit. Heat is a type of energy, so BTU can be directly compared to other measurements of energy such as joules (SI unit of energy), calories (metric unit), and kilowatt-hours (kWh).

BTU/h, BTU per hour, is a unit of power that represents the energy transfer rate of BTU per hour. BTU/h is often abbreviated to just BTU to represent the power of appliances. For example, an AC marked with a label of 12,000 BTU actually has a power requirement of 12,000 BTU per hour.

Below is a table that shows the estimated energy requirements of various appliances (these values can vary significantly depending on the appliance). It is important to note that the requirements listed on the packaging of an appliance generally reflect the maximum energy requirements of an appliance. Typical usage of the appliance likely results in far lower energy use than stated, so it cannot be calculated directly as power requirement time.

I personally always find it difficult to choose the correct weapons for my hunting trips. Even though the game has recommended hit energy values specified for each animal in the encyclopedia it doesn't list this information for any of the weapons, which makes picking the right rifle difficult unless you know all energy ratings at various distances by heart.

The hit energy values for all weapons and distances were acquired by myself on the shooting range in Transylvania and will probably be different for each player by a very small amount depending on the conditions. The deviation should be negligible and will not affect the calculations by much.

A well designed HVAC system ensures building comfort by adjusting internal temperatures, mixing air in rooms, maintaining humidity levels. When the system is properly sized for the building, it will operate unnoticed, and be energy efficient. Unfortunately, many HVAC systems fail to achieve these very basic objectives.

Air leakage is responsible for as much as 30% of all the energy lost in a building. The average building has enough air leakage to add up to a two-foot-square hole, the equivalent of leaving a medium sized window wide open 24 hours a day.

Food calories are a measure of energy in food. One food calorie is equal to 1,000 calories, or 1 kilocalorie. For example, the energy in a 300-food calorie ice cream cone is about the same as the amount of electricity required to light a 100-watt incandescent light bulb for 3.5 hours.

Determining how much electricity your appliances and home electronics use can help you understand how much money you are spending to use them. Use the information below to estimate how much electricity an appliance is using and how much the electricity costs so you can decide whether to invest in a more energy-efficient appliance.

Many appliances continue to draw a small amount of stand-by power when they are switched "off." These "phantom loads" occur in most appliances that use electricity, such as televisions, stereos, computers, and kitchen appliances. Most phantom loads will increase the appliance's energy consumption a few watt-hours, and you can use a monitor to estimate those too. These loads can be avoided by unplugging the appliance or using a power strip and using the switch on the power strip to cut all power to the appliance.

If you want more detailed data on your home's energy use (as well as the ability to measure the energy use of 240-volt appliances), you might consider installing a whole-house energy monitoring system. The features of these systems vary, and the cost and complexity depends on the number of circuits you want to monitor, the level of detail of the data, and the features available. The monitors are often installed directly in the main breaker panel of the home, and some may require an electrician to install. Some monitors must be connected with your home's wireless network and data is viewed on a computer or smartphone, while others come with a dedicated display.

In addition to providing information on the energy consumption of your appliances, these monitors help you understand where and when you use the most energy, allowing you to develop strategies to reduce your energy use and costs.

Select data to convert:There are two options for entering data into this calculator: energy data or emissions data. When you enter energy data, the calculator converts these values into carbon dioxide-equivalent greenhouse gas emissions based on emission factors for energy consumption or electricity reductions. Then, it provides equivalent ways to express those emissions. When you enter emissions data, the calculator provides equivalent ways to express those emissions.

Carbon Dioxide or CO2 Equivalent* Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities. CO2 is naturally present in the atmosphere as part of the Earth's carbon cycle. The main human activity that emits CO2 is the combustion of fossil fuels (coal, natural gas, and oil) for energy and transportation, although certain industrial processes and land-use changes also emit CO2. Link

This tool uses basic information about your driving habits to calculate total cost of ownership and emissions for makes and models of most vehicles, including alternative fuel and advanced technology vehicles. Also see the cost calculator widgets.

Need a quick unit conversion from wavelength (nm) to photon energy (eV)? Need to convert flux (ph/s) to average power (mW)? Simply enter the known value in the boxes below, and the calculator will provide the equivalent value in the appropriate unit.

Power (P) is the rate of energy transfer with the SI unit of 1 Watt = 1 J/s. The power of short wavelength light sources in the EUV to X-ray range are often expressed as photon flux (F) in the units of photons per second (ph/s). Average power is related to flux and photon energy by:

A variable speed pool pump allows you to control the pump over a wide range of RPM, unlike a single- or two-speed pool pump. Variable speed pumps are more energy efficient than conventional pool pumps, which leads to savings for you!

A variable speed pool pump could save you up to 90%* on your energy costs compared to a conventional single- or two-speed pool pump. They are often quiet when running and many offer built-in programming features and better filtering capabilities. Variable speed pumps consume less power and pay for themselves over time; typically in 2 years or less. In addition, it can qualify you to receive public utility rebates. Plus, since July 2021, U.S. Department of Energy (DOE) minimum efficiency regulations made variable speed pool pumps the only option for most pools.

Use the calculator below to calculate the kinetic energy of a bullet. In order to determine the kinetic energy, you must know the velocity of the bullet and the weight of the bullet in grains. You may add items to the list on the right in order to create a bar graph comparing the different items. This is useful for comparing handloads, muzzle energy, different cartridges, and the energy of a bullet at different times in flight according to its velocity.

Understanding and studying the kinetic energy of a bullet is important in determining terminal ballistic performance. Although there are other factors that affect terminal ballistics such as the bullet shape and type, the kinetic energy of a bullet is useful for comparing different cartridges. The kinetic energy of the bullet is the energy that is transferred to the target when hit. It is also the energy that the shooter absorbs through recoil by shooting. e24fc04721