A person in a kitchen notices that the reusable cutlery sometimes gets thrown away by accident. The person wants to use a magnet to catch the cutlery before it falls into the trash can. Cutlery includes forks, spoons, and knives and can be made of metal or plastic.

Question

Figure 1 shows two trash can designs that use magnets in different ways. One trash can has Magnet A around the rim of the trash can. The other trash can has Magnet B placed on a lid where the trash slides into the trash can.

An experiment is done to determine which magnet catches more cutlery.

Select two things that should be done to make sure that the experiment tests which magnet works better.
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2 points
Captionless Image
test both metal and plastic cutlery
use different types of magnets in each trash can
drop the same number of cutlery pieces into each trash can
test forks, spoons, and knives in the trash can with Magnet A
drop the cutlery the same distance away from the magnet in both cans.
Devon was watching an old television show about people stranded on an island. One of the characters wanted to make an electric generator out of a bicycle. What does he need to find?
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2 points
two magnets
a battery
a coil of wire
an electromagnet
a light bulb

Answer 1

To ensure that the experiment tests which magnet works better, you should:

1. Drop the same number of cutlery pieces into each trash can. - This helps control for the variability in the amount of cutlery that could potentially affect the outcome.

2. Drop the cutlery the same distance away from the magnet in both cans. - This maintains consistency in how close the cutlery is to the magnets, allowing for a fair comparison of their effectiveness.

As for the character from the television show wanting to make an electric generator out of a bicycle, he would need to find:

A coil of wire. - A coil of wire is essential for generating electricity in combination with magnets, as it allows for electromagnetic induction to occur when the magnets interact with the movement of the bike.