Physics Girl's 20 Experiments Challenge

What is the main challenge Dianna sets for herself in the video?

• To perform 25 experiments in six minutes

• To perform 20 experiments in five minutes

• To perform 10 experiments in ten minutes

• To perform 15 experiments in three minutes

Which principle is used to move water with a balloon?

• Buoyancy

• Magnetism

• Gravity

• Static electricity

What effect is demonstrated when water rolls around on a hot pan?

• Bernoulli's effect

• Venturi effect

• Leidenfrost effect

• Coriolis effect

What happens to a can when it is turned over into ice water?

• It floats

• It melts

• It crushes

• It expands

How does Dianna pop a closed can using a Sharpie?

• By rubbing with pressure

• By freezing it

• By shaking it

• By heating it

What gas is used to extinguish a candle flame in one of the experiments?

• Oxygen

• Helium

• Nitrogen

• Carbon dioxide

What causes a tea bag to fly when lit on fire?

• Hot air rising

• Cold air sinking

• Electric currents

• Magnetic fields

What happens to needles when they are heated in one of the experiments?

• They melt

• They change color

• They lose their magnetism

• They become more magnetic

What property allows water to travel down a string in one of the experiments?

• Capillarity

• Density

• Surface tension

• Viscosity

What does Dianna encourage viewers to do at the end of the video?

• Ignore the experiments

• Try the experiments and share results

• Buy her merchandise

• Subscribe to her channel