my big test is on monday

[scubamate]

camuhrun,

The thing I tell my students is to "Read the question, read all the answers, reread the question then start eliminating the wrong answers and this with a little common sense will lead you to the correct answer. Some times more than one answer may be correct so chose the best answer."

knotical's suggestions on the RDP are good ones.

Good luck and take your time! Let us know how you do.

BTW, I don't pass my students unless they score an 80% or higher. This tells me I'm doing my job properly.

 

[miketsp]

The boat displaces a volume of water whose weight is equal to the weight of the brick. Assuming the brick is more dense than water (i.e. it sinks), it displaces less water than than the boat did, and the water level of the lake goes down. And since ice is less dense than water (i.e. it floats), it goes the other way. But as a practical matter your answer is right: you won't be able to measure either difference.

Edit: whoops, too hasty. The ice floats in both places, so it doesn't affect the water level. And when it melts nothing changes.

Well done. :dazzler1:

Throwing the brick into the water makes the water level drop compared to the shore.

Throwing the ice in has no effect.
The ice melting has no effect.