EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.2.1 Measuring Rates Measuring Rates You should be able to describe experiments to investigate the effect of surface area, concentration, t...
Variations in Breathing Rate & Heart Rate During exercise, muscle contraction occurs more frequently, requiring more energy The rate of aerobic respiration increases to meet the increase in ene...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.1.4 Practical: Investigating Temperature Changes Practical: Investigating Temperature Changes Aim: To perform a calorimetry study of the reaction...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.1.3 Energetics Calculations Calculate Heat Energy Change In order the calculate heat energy changes you need to know the mass of the subst...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.1.2 Calorimetry Calorimetry Calorimetry is a technique used to measure changes in enthalpy of chemical reactions There are two types of ca...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.1.1 Exothermic & Endothermic Exothermic & Endothermic The changes in heat content can be determined and measured with a thermomete...
Calculating Cardiac Output Cardiac output (CO) is the term used to describe the volume of blood that is pumped by the heart (the left and right ventricle) per unit of time An average adult has a ca...
ECGs & Diagnosing CVD Electrocardiography can be used to monitor and investigate the electrical activity of the heart Electrodes that are capable of detecting electric signals are placed on the...
Electrical Activitiy in the Heart Control of the basic heartbeat is myogenic, which means the heart will beat without any external stimulus This intrinsic rhythm means the heart beats at around 60 ...
