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National 5 Physics 2018-19

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What did everyone say for the one about time delays

username4623278

Original post by rg2019

What did everyone say for the one about time delays

Time delays?

Was about a beep and a flashing light

Original post by The_RobDob

Time delays?

Original post by rg2019

Was about a beep and a flashing light

The light or whatever had to travel a longer distance in the same time?? Or something along those lines

username4623278

Original post by rg2019

Was about a beep and a flashing light

Ah you had to mention the speed of sound and light and how they compare

Original post by rg2019

Was about a beep and a flashing light

I showed my answer in the form of 4 equations, with a reasoning statement below each.

t = d/v (2 for speed of sound, 2 for speed of light; with a statement comparing the 2)

What did people get for the mass of steam question? Me and my friends got different answers and I want to see what others say

What did you get

Original post by Attle

What did people get for the mass of steam question? Me and my friends got different answers and I want to see what others say

Can’t remember the number but I did the first energy (91000j I think) minus the second energy (can’t remember the number) divide by the latent heat of vaporisation for water

Was it something like 3x10-3 kg

Original post by Attle

Can’t remember the number but I did the first energy (91000j I think) minus the second energy (can’t remember the number) divide by the latent heat of vaporisation for water

Yeah 3.27x10^-3

Yes that was the correct way to do it.

Original post by Attle

Yeah 3.27x10^-3

Ok, thank you

Original post by Fhhdndjdj

Yes that was the correct way to do it.

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