How long does a shower have to be, to use the same amount of water as a bath?

Tuesday 18th January 2011
Submitted by Jack Serle
Lawrence Berry, by email

A bath filled about a third of the way up (which takes the water level over your belly button when you lie down) requires around 75 litres. An ordinary electrically heated shower puts out four litres per minute. So a 19-minute shower is just more than a bath. If you have a power shower, flow rates could be doubled and you’d need just 10 minutes.

GOT A QUESTION?

Scratching your head over a burning scientific conundrum? submit your question and we'll get our esteemed panel of experts to answer it for you.

 

Is it true that a son will always grow to be taller than his mother?
previous qanda Article
How does salt melt snow?
next qanda Article
Q&A Tabs

Your DNA is arranged into chromosomes, which are grouped into 23 pairs. When a sperm cell is manufactured, the father’s genome is split in two, so that each sperm receives one chromosome...

If you put diesel in a petrol engine, it’d cause knocking, which would eventually cause serious damage. As for diesel engines, they use the fuel itself as a lubricant. Using petrol would...

A lunar month is slightly shorter than a calendar month, so every two to three years, there is an extra lunar cycle above the usual 12. This additional moon is called the ‘blue moon’...

There are currently around 6,000 different languages spoken around the world. Using statistical techniques to analyse the rate at which words and dialects mutate, it has been calculated that it...

Bacteria evolved in environments where the concentration of sugars and salts is the same as or lower than those inside the cell. High sugar concentrations cause the bacterium to lose water by...

All female mammals have a clitoris, the sole purpose of which is to react to sexual stimulation, and presumably this stimulation has evolved to be pleasurable for most species. But establishing...

To create a sound, we have to set matter - whether it's a gas like air, a liquid or even a solid material - in regular motion, creating a wave of specific frequencies, which we hear as a sound of...

Mirrors don’t reverse left and right either – that’s just our interpretation of what happens. Your reflection in the mirror is actually reversed front to back – if you have...

Discovered by an American student named Gary Flandro in the mid-1960s, the slingshot manoeuvre usually involves spacecraft briefly 'coat-tailing' a planet orbiting the Sun, extracting some of the...

The ice disappears because the wind blows away water molecules that have evaporated or 'sublimed' from the ice, so the ice slowly shrinks in size. The molecules that escape are those with the...

We use cookies to improve your experience of our website. Cookies perform functions like recognising you each time you visit and delivering advertising messages that are relevant to you. Read more here