Practice PIEAS Science General questions with answers and explanations.
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The metre is the SI base unit of length.
Other metric length units are derived from it using prefixes.
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The kilogram is the SI base unit of mass.
The gram is one-thousandth of a kilogram.
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The second is the SI base unit of time.
Minutes and hours are accepted non-SI units derived from it.
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A scalar has magnitude only.
Speed has no associated direction.
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A vector has both magnitude and direction.
Acceleration describes the rate and direction of velocity change.
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Both sides of a valid physical equation must have the same dimensions.
Dimensional analysis can reveal inconsistent formulas.
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The newton is derived from base units as kg·m/s².
Metre, kilogram, and second are base units.
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The sum is 12 + 18 + 20 + 30 = 80.
Dividing by 4 gives an average of 20.
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Convert each value to decimals: 5/8 = 0.625, 0.60 = 0.60, 59% = 0.59, and 3/5 = 0.60.
Therefore, 5/8 is the greatest.
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Total equals average multiplied by the number of values.
Thus, 24 × 5 = 120.
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Multiply 2 × 3 = 6 and count three decimal places in total.
The product is 0.006.
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Multiply both numbers by 10 to remove decimals.
Then 48 ÷ 6 = 8.
