It is 292.5 m because you do 4.5 hours times 65. (please give me brainliest)
The inverted cone, hope it helps .
Explanation:
The density of a substance can be found by using the formula

From the question
mass of block = 5 g
volume = 15 mL
The density of the block is

We have the final answer as
<h3>0.33 g/mL</h3>
The block will float on water since it's density is less than that of water which is 1 g/mL
Hope this helps you
Answer:
Electric engines have efficiencies of roughly 90% whilst combustion engines about 10% to 30%. This is because combustion engines emit much more heat, which is always energy that is not used as work, and thus increases inefficiency.
Explanation: