Question

I'm in AP Physics, and this question is stumping me. Any help? The problem...

"When submerged in water, the apparent mass of 1 cubic meter of pure gold is 18,300 kg. What is its mass in air?

A. 16,300 kg
B. 17,300 kg
C. 18,300 kg
D. 19,300 kg
E. 20,300 kg"

Any and all help is greatly appreciated!! (Medal up for grabs)

Answer 1

D

Answer 2

It's D? Not so much that I'm in disbelief... I just have no flipping idea how to find that. :) ...Explanation?
And as a side note- Thank you soo much for answering! I've been waiting all day, reposting and Bumpin...

Answer 3

@ne

Answer 4

@neluthenoodle

Answer 5

You're welcome and sure I'l give you the explanation right now give me a few mins to write it.

Answer 6

Lol, sounds good. :)

Answer 7

1 m3 volume cube under water displaces 1m3 of water. This weight of water = pVg =
1000(1)(10) = 10000 N which is equivalent to the buoyant force. The apparent weight in
water is mappg = 18300(10) = 183000 N. This apparent weight is lessened by the buoyant
force pulling up with 10000 N of force. So outside of the water, this upwards force would
not exist and the actual weight would be 193000 N which equal 19300 kg of mass.

Answer 8

Jesus I feel dumb...
Okay, thank you so much!! :)

Answer 9

Make that SOOOO muc.

Answer 10

*much
I hate using mobile devices sometimes...

Answer 11

I noticed you used 10 as gravity... Are you in AP Physics too?

Answer 12

@neluthenoodle

Answer 13

Yes I am, I started taking it this year.

Answer 14

Sweet! I'm going to remember that in case I ever need help. Only in the context of asking for it (help), not that I'm considering you an abusable tool or anything, lol.

P.S. I never want to go back to 9.8... Ever... ;p

Answer 15

The class is pretty easy to be honest, if you have a long attention span. I hope you do great on your test if these questions are for a test, and good night.

Answer 16

Yeah, it's my favorite class, when it comes right down to it. Aye, it's for a test. Take-home over break.
Goodnight!