General Physics

Question 1

State the 7 base/SI quantities with their units

Answer 1

• distance/length (metres = m)
• temperature (kelvin = K)
• mass (kilogram = kg)
• time (seconds = s)
• current (ampere = A)
• amount of substance (moles = mol)
• luminous intensity (candela = Cd)

Question 2

x10^3 - prefix and letter used to represent

Answer 2

kilo (k)

Question 3

x10^6 - prefix and letter used to represent

Answer 3

Mega (M)

Question 4

x10^9 - prefix and letter used to represent

Answer 4

Giga (G)

Question 5

x10^12 - prefix and letter used to represent

Answer 5

Terra (T)

Question 6

x10^-3 - prefix and letter used to represent

Answer 6

milli (m)

Question 7

x10^-6 - prefix and letter used to represent

Answer 7

micro (μ)

Question 8

x10^-9 - prefix and letter used to represent

Answer 8

nano (n)

Question 9

x10^-12 - prefix and letter used to represent

Answer 9

pico (p)

Question 10

x10^-2 - prefix and letter used to represent

Answer 10

centi (c)

Question 11

What is precision in data

Answer 11

• how close the values are to each other

- the consistency of the values together

Question 12

What is accuracy in data

Answer 12

close to the true/agreed value

Question 13

What is validity in data

Answer 13

• when the measurements relate and are to do with what you are trying to find out

Question 14

Valid results mean a ….

Answer 14

fair test - keeping all the control variables the same

Question 15

Important things you should do when collecting a set of data

Answer 15

• take multiple readings and find a mean

- Identify and remove anomalies

Question 16

what are the common mistakes made during calculations

Answer 16

• not converting
• rounding incorrectly or before the question is finished
• putting the wrong values into and equation
• rearranging an equation incorrectly
• giving the answer to the wrong significant figures or decimal places

Question 17

what is the equation for the area of a triangle

Answer 17

0.5 x base x height or 0.5 x a x b x sin c

Question 18

what is the equation of the circumference of a circle

Answer 18

2 x π x radius

Question 19

what is the equation of the area of a circle

Answer 19

π x radius^2

Question 20

what is the equation of the surface area of a cylinder

Answer 20

2 x π x radius x height + 2 x π x radius^2

Question 21

what is the equation of the volume of a cylinder

Answer 21

π x radius^2 x height

Question 22

what is the equation of the surface area of a sphere

Answer 22

4 x π x radius^2

Question 23

what is the equation of the volume of a sphere

Answer 23

4/3 x π x radius^3