More Speed Measurements

Today we got some traffic cones and we put them 40 meters apart. I got on my unicycle and dad got out his stopwatch when I past the starting cone at normal unicycling speed he started it and when I past the finishing cone he stopped it. We did the same with dad on a normal bike, me walking, dad walking, me running as fast as I could, and dad running as fast as he could. Here is a commentary of the speeds we were going at.
And we're of, with dad running in the lead going at 22.5 kilometers per hour with a time of 6.4 seconds he looks like a clear winner, but who knows, someone else might catch up, and coming along in second place with a speed of 21.3 kilometers per hour with a time of 6.75 seconds is Leontien running, and here comes dad cycling and oh gosh, just look at him go, he's got a time of 6.65 going at a speed of 21.7 kilometers per hour. and now bring up 4th place is leontien unicycling with a speed of 7.2 kilometers an hour and with a fabulous time of 20 seconds, and here comes dad walking in fifth and just look at him walking at a speed of 6.7 kilometers an hour and with a time of 21.4 seconds and bringing up the rear is leontien walking, and I am sure that she is going to be upset about losing so can everyone in the stadium give her a big round of applause for trying!!!!!! This is Leontien commentating for the weird and random race!!!!

our version of an anemometer (aka toilet paper, a stopwatch and some long legs)

Today, the winds were so strong, that we decided to figure exactly how strong and how fast they actually were, so we built an anemometer (pronounced an-e-mom-e-ter) using a few pieces of tissue paper, a stopwatch, and my dad's long legs. We went on to the mound and dad stood at one end, me at the other and making sure the wind was blowing from him to me. He threw the tissue into the air and at the same time I started the stopwatch. As soon as the tissue was level with me, I stopped the stopwatch and dad counted how many of his meter long steps it took to reach me. It took 3.1 seconds to reach me and it was 39 meters from dad to me.
We need to convert 39 meters in 3.1 seconds into something more useful like how many kilometers per hour.
39 meters per 3.1 seconds
39 ÷  3.1 =12.5
12.5 meters per 1 second
This can be written as 12.5 m/s 
There are 3600 seconds in an hour
12.5 x 3,600 = 45,000meters per hour
45,000 ÷ 1000 = 45

So that means that the wind is going at a speed of 45 km/h.
We looked at the met.ie website predicted that we would be getting winds of of around 45 km/h but would also be getting gust of 90 to 130 km/h.

That is the weather for today, this is Leontien reporting from cloughjordan, have a nice day.

Nana's Fish Tank: Volume Problem

PROBLEM:
If Nana wanted to change all the water in the fish tank, how many large bottles worth of water would it take?

WHAT WE KNOW:
1. One water cooler bottle is equal to 5 US gallons. Using a converter we calculated that this is 18.9 litres.
2. One litre of water weighs 1 kilogram (I found this out with a previous experiment).




SOLUTION:
1. How big is a litre?

• We measured a litre carton of milk, using a tape measure.
• It is 7.3cm x 7.3cm x 20 cm high
• 7.3 x 7.3 = 53.29 cm²
• 53.29 x 20 = 1,065.8, we rounded that off to 1,000cm³
• Conclusion: 1 litre is equal to 1000cm³

2. How big is the fish tank?

• We measured the tank and it was 44cm wide, 52 cm high and 88 cm long
• 44 x 52 x 88 = 201,344 cm³ or aprox 200,000 cm³
• Since one litre equals 1000cm³ then 200,000 ÷ 1000 = 200
• Therefore there are 200 litres in Nana's fish tank

3. How many jugs of water are needed?

• We know that one jug is 18.9 litres so 200 litres ÷ 18.9 = 10.5
• Therefore we will need aprox 10.5 jugs of water.

THINGS WE FOUND OUT:
1. 1 litre is equal to 1000 cm³ , we can use a tape measure to figure out the volume of something in litres.

2. If it is water we can also figure out how much it weighs because we know that 1 litre of water weighs 1 kg.