3 years ago

Design an experiment (Fair Test) to find out what would be a good insulator for a dog house.

1 answer:

4 0

Have 5 (or any number) doghouses each with a different insulator. Make sure the other variables are controlled so the experiment if fair. Put a thermometer inside the doghouse and record the temperature inside each doghouse. Whatever doghouse has the highest temperature is the best insulator.

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3 years ago

You lift a large bag of flour from the floor to a 2.5m high counter, doing 400J of work in 2 seconds. How much force did you app

oksian1 [2.3K]

<h2>The man have to apply force of 160 N</h2>

Explanation:

The work done to lift the bag of weight mg through height 2.5 m is 400 J

The work done can be found by relation W = mg x h

Thus mg = $\frac{W}{h}$ = $\frac{400}{2.5}$ = 160 N