Units and Measurement

This answer has been deduced from Einstein's mass energy equivalence E = mc². The student may have made some mistakes while calculating.

The Volt is the SI unit for electric potential difference. Joule measures energy, Ohm measures resistance, and Coulomb measures electric charge.

SI units for specific heat capacity is joule per kilogram kelvin (J/kg.K)

A 'therm' is a unit of heat energy, equivalent to 100,000 British thermal units (BTUs).

A light-year sometimes written light year or lightyear is a unit of length used in astronomy, though it is often mistaken for a unit of time. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year.

This is the correct option. The amount of atmospheric ozone is expressed in Dobson units. The Dobson unit is the most common unit for measuring ozone concentration. One Dobson unit is the number of molecules of ozone that would be required to create a layer of pure ozone 0.01 millimeters thick at a temperature of 0 degrees Celsius and a pressure of 1 atmosphere.

An electron volt (eV) is a unit of energy equal to the amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt.

Resolution is typically measured in pixels per inch (PPI) or dots per inch (DPI).

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Noise intensity is measured in decibels (dB). Note that the option provided contains a spelling error ('decibal' instead of 'decibel'), but it is the intended answer.

The Pascal (Pa) is the SI derived unit of pressure.

One calorie is defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius, which is approximately 4.2 joules.

An angstrom is a unit of length equal to 10^-10 meters, commonly used to measure wavelengths of light and atomic distances.

1. The amount of a substance that contains as many atoms, molecules, ions, or other elementary units as the number of atoms in 0.012 kilogram of carbon 12.