1. Quantative Physics

Question 0

What is the equation for time, distance or speed?

Answer 0

Question 1

What are the fundamental SI units?

Answer 1

• meter • kilograms • second • ampere • kelvin • mole • candela

Question 2

Distinguish between precision and accuracy

Answer 2

Precise = When the data values are close together Accurate = When all the data values are on point

Question 3

Give 3 examples of random error

Answer 3

• Change in experimental conditions, such as temperature or pressure • A different person reading the instrument • Malfunction of a piece of apparatus

Question 4

Give 3 examples of systematic errors

Answer 4

• An observer consistently making the same mistake • Apparatus calibrated incorrectly • Energy converted to heat due to friction on a pulley

Question 5

Distinguish between vector and scalar quantities, and give 3 examples of each

Answer 5

Scalar = Have size or magnitude; almost always needs a unit. e.g. Distance, speed, temperature, mass, all types of energy, work and pressure. Vector = Have magnitude and a direction e.g. Displacement, velocity, acceleration, weight, all forces, momentum and all field strengths