ALL CIE PHYSICS DOUBTS HERE !!!

[WARRIOR]

What will happen to the water level if someone was sitting in a boat floating on a very small pond and then he take the anchor  out of the boat and drop it into the water? ( assuming the anchor reached the bottom of the sea  and the boat stops )

[$!$RatJumper$!$]

W04 Q1 (b)(ii) please

[$!$RatJumper$!$]

And may someone please put the values of all the frequencies & wavelengths in the electromagnetic spectrum.

Thankx

[Deadly_king]

What will happen to the water level if someone was sitting in a boat floating on a very small pond and then he take the anchor  out of the boat and drop it into the water? ( assuming the anchor reached the bottom of the sea  and the boat stops )

The level of water will rise.

But we may not note this rise due to the large surface area covered by the pond, even if the pond is very small.

The volume displaced by the anchor upon sinking may be negligible compared to the total volume of water in the pond.

[TJ-56]

W04 Q1 (b)(ii) please

If the percentage uncertainty of the diameter is (0.02/0.50)*100% = 4%
Area is pi* r^2 , so to calculate the uncertainty of a squared value, we multiply it by the power, and here the power is 2, so 4% *2 = 8%
Hope that was helpful

[TJ-56]

And may someone please put the values of all the frequencies & wavelengths in the electromagnetic spectrum.

Thankx

[Deadly_king]

If the percentage uncertainty of the diameter is (0.02/0.50)*100% = 4%
Area is pi* r^2 , so to calculate the uncertainty of a squared value, we multiply it by 2m so 8%
Better?

Good job dude

You may look here as well for the electromagnetic spectrum. (click on electromagnetic spectrum in the index on your right )

[SpongeBob]

If anyone could help me with this? (:

[ruby92]

I will give you a tip try it

Internal energy = PEs + KEs

since ideal gas does not have intermolecular forces of attraction PE =o

Internal energy= KEs
                     = number of gas molecules * KE of one atom

thanks

[TJ-56]

Can someone solve s07 qp2 q4 (d) both parts, literally driving me crazy, and if u can pls post the vector diagram,
thanx for the help

[$!$RatJumper$!$]

Can someone solve s07 qp2 q4 (d) both parts, literally driving me crazy, and if u can pls post the vector diagram,
thanx for the help

Hope this helps

[TJ-56]

thanx
+rep

[Hypernova]

The level of water will rise.

But we may not note this rise due to the large surface area covered by the pond, even if the pond is very small.

The volume displaced by the anchor upon sinking may be negligible compared to the total volume of water in the pond.

wait a sec.

First the anchor is on the boat. It exerts a downward force on the boat, forcing the boat down, so displacing alot of water.

When the anchor is released, less of the ship is in the water therefore less water diplacement. The volume diplaced by the anchor is small.

The higher the water displacement, the higher the water level.

Since water displacement decreased the water level should also decrease.

Imagine yourself in a bathtub. Imagine that the anchor is on you, you will go deeper into the water, the water will rise. when the anchor is released, less of you will be in the water, so the water level will decrease.

[astarmathsandphysics]

If anyone could help me with this? (:

Need part i) of the question.

[astarmathsandphysics]

If the anchor doesnt reach the bottom the overall water level will not change cos the weight of water displaced equals weight of boat + weight of anchor.
If the anchor hits the bottom then archimedes principle only applies to the boat. The weight of water displaced equals the weight of the boat only, so less water is displaced and the water level falls.