HSA Physical Science 3

Question 1

Two magnets are brought near each other with their north poles facing. What will happen?

Accepted Answer

They will repel each other

Answer

They will attract each other

Answer

They will have no effect on each other

Answer

The magnets will lose their magnetism

Question 2

A 10 kg object is moving at 2 m/s. What is its kinetic energy? (KE = ½mv²)

Accepted Answer

20 J

Answer

10 J

Answer

40 J

Answer

100 J

Question 3

Which of the following is an example of converting electrical energy into light energy?

Accepted Answer

A light bulb glowing

Answer

A fan spinning

Answer

A battery charging

Answer

A car engine running

Question 4

At what temperature does water boil at standard atmospheric pressure?

Accepted Answer

100°C

Answer

0°C

Answer

50°C

Answer

212°F only

Question 5

An inclined plane reduces the effort needed to move an object by:

Accepted Answer

Spreading the work over a longer distance

Answer

Increasing the speed of the object

Answer

Decreasing the distance traveled

Answer

Eliminating friction completely

Question 6

Which of the following is NOT a property used to identify a pure substance?

Accepted Answer

Mass

Answer

Melting point

Answer

Density

Answer

Boiling point

Question 7

Which type of wave requires NO medium to travel through?

Accepted Answer

Electromagnetic waves

Answer

Sound waves

Answer

Water waves

Answer

Seismic waves