Science Equations

Question 1

Moles

Answer 1

Mass / relative atomic mass

Question 2

Relative atomic mass

Answer 2

(Mass number of isotope * percentage of isotope) + (mass number of isotope * percentage of isotope) * 100

Question 3

How do you get between PH?

Answer 3

Multiply or divide by 10 to go up or down

Question 4

Concentration

Answer 4

Concentration = mass / volume

Question 5

Magnification

Answer 5

Image size / actual size

Question 6

BMI

Answer 6

Weight / height^2

Question 7

Waist:hip ratio

Answer 7

Waist size compared to hip size

Question 8

Efficiency

Answer 8

(Useful energy out / total energy in) * 100

Question 9

Gravitational potential energy store

Answer 9

Mass * gravitational field strength * change of height

Question 10

Kinetic energy

Answer 10

1/2 * mass * velocity^2

Question 11

Speed

Answer 11

Distance / time

Question 12

Acceleration 1

Answer 12

(Final velocity - initial velocity) / time taken for change

Question 13

Force 1

Answer 13

(Final momentum - initial momentum) / time

Question 14

Change in velocity

Answer 14

2 * acceleration * distance

Question 15

Force 2

Answer 15

Mass * acceleration

Question 16

Stopping distance

Answer 16

Thinking distance + braking distance

Question 17

Momentum

Answer 17

Mass * velocity

Question 18

Wavespeed

Answer 18

Frequency * wavelength

Question 19

Acceleration 2

Answer 19

Force / mass

Question 20

Resultant force

Answer 20

Mass * acceleration