# Shared Flashcard Set

## Details

Physics section 4
IGCSE Physics
14
Physics
06/20/2017

Term
 What are the 2 formulas for pressure?
Definition
 p = F/A p = ρgh
Term
 What do a barometer and manometer do?
Definition
 barometer: measures atmospheric pressure manometer: measures/compares the difference in presssure of 2 fluids
Term
 What is a fluid?
Definition
 - can be a gas or a liquid -we are living in a fluid (air) at the moment - fluids are able to flow or move around
Term
 What are the factors that affect the rate of evaporation?
Definition
 - surface area -temperature -wind
Term
 What is the difference between boiling and evaporating?
Definition
 Evaporation happens at every temperature, while boiling always occurs at a fixed temperature - the boiling point of a liquid (100 degrees).   Evaporation only occurs at the surface of the liquid, while boiling can occur within the body of the liquid as bubbles of steam appear.
Term
 Expansion of different states of matter
Definition
 Gases expand the most.   Liquids do not expand as much as gases.   Solids expand the least when heated.
Term
 Types of thermometers
Definition
 1. Liquid in glass (the liquid is usually mercury) 2. The clinical thermometer (used to measure temperature of humans) 3. Thermocouple thermometers (Consists of 2 wires of different materials)
Term
 Formula for specific heat capacity
Definition
 C = E/mΔT   (E - energy, m - mass, T - degrees)
Term
 Formula for specific latent heat
Definition
 E = mL   (L - latent heat of fusion or evaporation, m - mass)
Term
 What factors do thermometers have to consider?
Definition
 1. Sensitivity 2. Range 3. Linearity 4. Accuracy
Term
 Internal energy
Definition
 The sum of all kinetic and potential energies in a substance
Term
 Formula for specific Heat Capacity
Definition
 C = Q/mΔθ   (Q - thermal energy in Joules, m - mass in kg, Δθ - change in temperature in degrees, c - specific heat capacity in J/kg degrees C)
Term
 Formula for Latent Heat
Definition
 Q = mL   (Q - energy in Joules, m - mass in kg, L - latent heat in J/kg)
Term
 Difference between the sensitivity and precision of a thermometer
Definition
 Sensitivity: amount of time needed for the thermometer to show the correct temperature   Precision: smallest possible temperature difference measured by the thermometer
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