Equations

Question 1

Equation to calculate the density

Answer 1

Density (g/cm3 or kg/m3) = mass(g/kg) / volume(cm3/m3)

Question 2

Equation for calculating weight

Answer 2

Weight = mass x gravitational field strength

Question 3

Equation for calculating pressure

Answer 3

Pressure = force / area

Question 4

Equation for calculating speed

Answer 4

Speed = distance / time

Question 5

Word equation for respiration and photosynthesis

Answer 5

Carbon dioxide + water ➡️ glucose + oxygen

Question 6

Equation for calculating how much work is done

Answer 6

Work done(Nm) = force(N) x Distance moved(m)

Question 7

Equation for calculating the moment

Answer 7

Moment = force x perpendicular distance from the pivot

Question 8

Word equation for anaerobic respiration in yeast (fermentation)

Answer 8

Glucose ➡️ ethanol + carbon dioxide (+energy)

Question 9

Word equation for anaerobic respiration in humans

Answer 9

Glucose ➡️ lactic acid (+energy)

Question 10

Equation for aerobic respiration

Answer 10

Glucose + oxygen ➡️ carbon dioxide + water (+energy)

Question 11

Write a word equation to show a reaction between magnesium and oxygen

Answer 11

Magnesium + oxygen ➡️ magnesium oxide