Tag: dynamics - explaining motion
Questions Related to dynamics - explaining motion
1 kilometer is ____ decimeter.
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$10^{4}$
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$10^{5}$
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$10^{3}$
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$10^{6}$
$1$ kilometer $=10^3$ meter and $1$ decimeter $=10^{-1}$ meter
1 nanometer is ___ femtometer.
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$10^{5}$
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$10^{6}$
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$10^{7}$
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$10^{4}$
$1$ nanometer $=10^{-9}$ meter and $1$ femtometer $=10^{-15}$ meter
1 yotta is ____ yocto
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$10^{48}$
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$10^{-48}$
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$10^{47}$
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$10^{49}$
Yotta is the largest decimal unit prefix and yocto is the smallest decimal unit prefix in the metric system.
1 millimeter is ____ terameter.
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$10^{-15}$
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$10^{-14}$
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$10^{-13}$
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$10^{-16}$
$1$ milimeter $=10^{-3}$ meter and $1$ terameter $=10^{12}$ meter
1 nanometer is ____ centimeter.
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$10^{-8}$
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$10^{-7}$
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$10^{-9}$
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$10^{-6}$
$1$ nanometer $=10^{-9}$ meter and $1$ centimeter $=10^{-2}$ meter
1 MeV is equal to
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$1.6\times 10^{13} Joules$
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$1.6\times 10^{13} cal.$
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$1.6\times 10^{13} ergs$
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None of these
An electronvolt is a unit of energy equal to the work done on an electron accelerated through a potential difference of $1$ volt.
Electron volt is the unit used to represent
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energy
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power
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intensity
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charge of electron.
Electron volt, unit of energy commonly used in atomic and nuclear physics, equal to the energy gained by an electron (a charged particle carrying unit electronic charge) when the electrical potential at the electron increases by one volt. The electron volt equals $1.602\times 10^{-12}\,erg$ or $1.602\times 10^{-19}\,joule$.
If the units of length and force are increased four times, then unit of energy will
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becomes 8 times
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becomes 16 times
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decrease 16 times
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increase 4 times
Unit of Energy $= kg. m^2/ s^2$
Unit of Force $= kg. m/s^2$
Unit of Length $= m$
Thus, unit of energy in terms of unit of force and length is given by
Unit of Energy $= (kg. m/s^2) \times (m)$
If the units of length and force are increased by four times,
the unit of energy will be:
Unit of Energy $= (4 .kg. m/s^2) \times (4m)$
Unit of Energy $= 16 (kg. m^2/s^2)$
Therefore, if the units of length and force are increased by four times, the unit of energy will change by $16$ times.
If 1 mg $ns^{-1}$ = $10^x \mu g ps^{-1}$, then the value of x is _________.
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1
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2
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-1
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0
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True
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False