Tag: matter around us
Questions Related to matter around us
The atmospheric pressure at sea level is:
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1 atm
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10 atm
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100 atm
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1 pascal
The atmospheric pressure at sea level is 1 atm.
Convert $100^oC$ to kelvin :
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$273$
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$373$
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$473$
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$573$
The formula for conversion of centigrade unit to kelvin is :
$=373K$
What is the physical state of water at $125^{\circ} C$?
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Solid
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Liquid
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Gas
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None of the above
Water boils at $100^{\circ}C$ and it converts into vapour above this temperature.
To convert Kelvin scale to Celsius scale:
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add $273$ to Kelvin scale
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subtract $273$ from Kelvin scale
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multiply $273$ with Kelvin scale
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divide $273$ by Kelvin scale
The S.I. unit of weight is:
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kilogram
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gram
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newton
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milligram
The S.I. unit of weight is newton since weight is the reaction force of an object due to gravity.
To convert Celsius scale to Kelvin scale:
-
add $273$ to Celsius scale
-
subtract $273$ from Celsius scale
-
multiply $273$ with Celsius scale
-
divide $273$ by Celsius scale
To convert from Celsius scale to Kelvin scale, add 273 to Celsius scale.
What is the density of a metal which has a mass of $15g$ and a volume of $2mL$?
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$7.5$
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$17$
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$0.15$
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$13$
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$30$
$Density= \cfrac {mass}{volume}= \cfrac {15g}{2ml}= 7.5\quad g/ml$
Which is correct option about the prefix centi is:
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One thousand
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One thousandth
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One hundred
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One hundredth
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One million
Selected Prefixes and Their Meanin
| G | billions (U.S.) | giga |
|---|---|---|
| M | Million | mega |
| k | thousand | kilo |
| h* | hundred | hecto* |
| da* | ten | deka* |
| d* | tenth | deci* |
| c* | hundredth | centi* |
| m* | thousandth | milli |
| $\mu$ | millionth | micro |
| n | billionth (U.S.) | nano |
$10^{-12}$ is called :
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Terra
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Pico
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Giga
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Mega
$10^{-12}$ is called as pico.
Which temperature is hottest?
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$17^oC$
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$58^o F$
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$290 K$
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$16^o C$