Topic 1 - Calculations

Question 1

Calculate total magnification

Answer 1

total magnification = eye piece lens X objective lens

Question 2

Calculate image size

Answer 2

image size = magnification X actual size of specimen

Question 3

Calculate estimated size

Answer 3

estimated size = field of view (in mm) ÷ number of cells you can see across the field of view

Question 4

Calculate the magnification of a light microscope

Answer 4

magnification of a light microscope = magnification of eyepiece lens X magnification of the objective lens

Question 5

Calculate the size of an object

Answer 5

size of object = size of image / magnification

Question 6

Calculate magnification

Answer 6

magnification = image size / actual size of specimen

Question 7

Calculate the actual size

Answer 7

actual size = image size / magnification

Question 8

Calculate the total magnification

Answer 8

total magnification = objective lens magnification X eyepiece lens magnification

Question 9

Calculate the rate of reaction

Answer 9

rate = change / time

Question 10

Calculate energy transferred

Answer 10

energy transferred = mass of water X 4.2 X temperature increase

Question 11

Calculate percentage change

Answer 11

percentage change = change in mass / start mass X 100