primary: make your hot drink cool
Hot things cool because they lose heat to their surroundings. We can help them to cool by making the surroundings cooler (by blowing) or by conducting heat away with a spoon. The greater the difference..
Tagged: heat
primary: keep baby warm
Babies and adults are warmer than their surroundings and constantly lose heat to it. Other things being equal, how quickly they lose heat depends on their size and the surrounding temperature. The
primary: taking temperatures
If a cup of hot water has a higher temperature than the room, it loses heat energy to the room. In contrast, ice water, which has a lower temperature than the room, will gain heat energy from the room. Knowing the temperature of
exothermic reactions
Exothermic reactions A temperature sensor can collect information about the heat generated when lime is mixed with water. Exothermic reactions are used in a glove heating pack. The proportions of this mixture is important....
heat of reaction
Heat of reaction As acid reacts with alkali, heat is evolved. This is the heat of neutralisation. This can be easily monitored using a temperature sensor. In this experiment the temperature is monitored continuously...
absorption of thermal radiation
Absorption of thermal radiation A shiny surface and a black surface absorb heat differently. Using temperature sensors or thermocouple probes it is possible to compare the temperatures on two these different surfaces. Either the...
heat insulation
Heat insulation A temperature sensor can be used to study the insulating properties of different materials. Two temperature sensors allow a simultaneous comparison to be made. In this experiment two beakers of hot water...
heat conduction
Heat conduction A temperature sensor can be used to study the conduction of heat through different materials. Two temperature sensors allow a comparison to be made. In this experiment strips of metal are heated...
heating effect of an electric current
Heating effect of an electric current The temperature, voltage & current of a heating unit are measured over a period of time. This allows us to calculate the power of the heater (voltage x...
latent heat – salty ice
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 is that the ice...
heat conduction through a window
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 remotely. This means that...
heat conduction
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, you heat strips of...
insulation
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 beakers of hot water...
exothermic reaction of plaster of Paris in water
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 mix it with water...
freezing a bun or bread roll
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 sensors in and around...
heating ice
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 not like that. We...
day and night light & temperature
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 equipment and started to...
add the milk to tea now or later?
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 answering this is to...
compare insulated drink beakers
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 the road, I wasn’t...
scientist 49: the building scientist – heat pumps and an eco-home (2012)
Building scientist David Crowther in Cambridge explains how a heat pump, under floor heating and good insulation keep a house warm. He talks to the Science Show’s Nicola Terry 05/02/2012 Tagged engineering, home energy, Nicola Terry, physics, Roger Frost,...
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scientist 29: the eco-home builder – solar panels by Polysolar (2013)
Pete McKeown, director of Cernunnos Homes and Hamish Watson, director of Polysolar tell Chris Creese about their special solar panels and offer some smart ideas for using solar energy. Follow-up link: Cernunnos Homes www.cernunnos-homes.co.uk Polysolar...
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