Water moves past a 10cm board in 1.3 seconds.
Evaluate and write the FORMULA to figure out how far the water will travel in a second.
Please Help, I forgot the formula -_-
2007-10-08 08:41:26 · 5 answers · asked by ajkid 1 in Science & Mathematics ➔ Mathematics
For this question, you're looking at how the distance the water travels relates to the amount of time it takes and the rate at which it travels that distance. So essentially you are given the distance it moves past the board and the amount of time it takes to travel that far, but now you have to find "how far the water will travel in a second," meaning the rate it travels per second. The formula you're thinking of is:
distance = rate x time
The only difference is that now you are looking for the rate since you know the other two parts. So you just rearrange this equation first for rate:
rate = distance/time
rate = 10 cm/1.3 sec
rate = 7.69230.. cm/sec
So the water travels about 7.7 cm/sec according to the information given.
Hope that helps!
2007-10-08 08:47:48 · answer #1 · answered by skm4usa 3 · 0⤊ 0⤋
Water moves 10 cm in 1.3 seconds and what is needed is the velocity (distance moved in 1 second)
10 / 1.3 = 7.7 cms rounded off to the first decimal. Distance / time is the formula for speed.
2007-10-08 15:45:23 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
10cm over 1.3 seconds = x cm over 1 second.
Cross multiply.
10x cm=1.3 seconds
Divide by 10
x=.13 cm
.13 cm per second
2007-10-08 15:49:09 · answer #3 · answered by Anonymous · 0⤊ 0⤋
10cm over 1.3 seconds = x cm over 1 second.
Cross multiply.
10x cm=1.3 seconds
Divide by 10
x=.13 cm
.13 cm per second
2007-10-08 15:45:13 · answer #4 · answered by Amber 3 · 0⤊ 0⤋
wow! thats 5th grade math?!?!?!?!?!
im in 7th grade and that even seems pretty hard!!!
2007-10-08 15:45:43 · answer #5 · answered by Anonymous · 0⤊ 0⤋