Tagged: temperature sensor
latent heat – salty ice
visitors this year: 351 When it is icy they put salt onto the roads to melt the ice. What the salt does is to depress, or reduce, the freezing point of water. The result...
characteristics of a thermistor
visitors this year: 133 A thermistor is an electronic component whose resistance changes with temperature. The voltage and current of a thermistor can be measured as the temperature changes. Sensors allow you to take...
pressure & temperature
visitors this year: 188 The pressure in a sealed container changes with temperature. These changes can be monitored using sensors attached to the computer. A graph of pressure against temperature can be plotted as...
heat conduction through a window
visitors this year: 34 Get two temperature sensors to measure the temperature inside and outside a window. You may find that over a long period of time it is best to record your data...
heat conduction
visitors this year: 93 You can use a temperature sensor to study the conduction of heat through materials. Two temperature sensors allow you to compare different materials at the same time. In this example,...
insulation of stacked cups
visitors this year: 47 Three plastic cups are stacked inside each other and a temperature probe placed between each cup. Before stacking the final cup hot water (take care) is poured into the middle...
insulation
visitors this year: 217 You can use a temperature sensor to study the insulating properties of materials. Two temperature sensors allow you to compare different materials at the same time. In this example two...
aerobic and anaerobic respiration
visitors this year: 189 When a living thing, such as yeast, respires it produces heat. It may do this in the presence or absence of oxygen. These processes are called aerobic respiration and anaerobic...
warm germinating seeds
visitors this year: 106 When seeds germinate they use energy and give off heat. To test this, you can use temperature sensors which will continuously monitor any heat produced. You will set up some...
energy in food
visitors this year: 45 As food burns it releases energy. This energy can be used to heat up water. If you know how much water you used, and how hot it gets, you can...
monitor fermentation in a compost heap
visitors this year: 60 Is mown grass in the compost heap really dead? When you cut the grass you remove its source of vital materials and the cut leaf ‘dies’. But when you feel...
exothermic reaction of plaster of Paris in water
visitors this year: 578 Plaster of Paris is white powder you mix with water and pour into a mould. You can make models with it while hospitals use it on broken limbs. When you...
freezing a bun or bread roll
visitors this year: 69 We scientists do the strangest of things. We wanted to see the temperature changes when you freeze and thaw things. So we took a ‘bun’ (a bread roll), placed temperature...
heating ice
visitors this year: 261 You would think that when you heat up ice that it gets warmer bit by bit. And maybe that the more you heat it the hotter it gets. Well it’s...
a cooling curve
visitors this year: 4,648 I expect that when something cools, it will get cooler in a plodding kind of way. That’s true, but when something changes state, the cooling is not so steady.The graph...
keep the house warm
visitors this year: 55 We need to keep our homes warm in cold weather. We also need to do this as economically as possible. There are several ways to insulate your home and keep...
day and night light & temperature
visitors this year: 42 What time does it get light in the morning? When does it get dark? Is the central heating working? I just had to know, so I took my data logging...
add the milk to tea now or later?
visitors this year: 131 The dilemma is this: the telephone range as I was making tea. Should I add the milk now or 5 minutes later, after I took the call? One way of...
compare insulated drink beakers
visitors this year: 52 An investigation with insulated and un-insulated beakers – reloaded “I bought a metal mug to carry my coffee for my daily trip to the train station. But twenty minutes down...
exothermic reactions
visitors this year: 48 When quicklime is mixed with water an exothermic reaction takes place. A temperature sensor can collect information about the heat generated over time. Other things being equal, this reaction might...
