physical science eoc review

The half-life of cadimum-109 is 464 days. A scientist measures out 256.0 gram (g) sample.

Approximately how many grams of cadmium-109 would remain after 1,392 days?

• 32.0g

• 64.0g

• 2,048.0g

• 1,024.0g

The elements neon and argon are not reactive. Which hypothesis BEST explains this?

• They are not stable atoms.

• They are not readily available on Earth.

• They tend to give up all of their valence electrons easily.

• They have the maximum possible number of electrons in their outermost shell.

In a longitudinal wave, the compression and rarefactions travel in

• The same direction that the wave travels

• A direction opposite to the wave travel

• Neither

The distance between two consecutive crests of a wave is called the

• Amplitude

• Frequency

• Wave speed

• Wavelength

The speed of any wave depends upon

• its energy

• The medium through which it travels

• Its angle of reflection

• Its amplitude

Which of the following transmit energy without transmitting matter ?

• Protons

• Baseball bats

• Waves

• Electrons

wave interference can occur for

• Sound waves

• Light waves

• Water waves

• All of the above

• None of the above

All waves have

• Amplitude

• Frequency

• Wave length

• Speed

• All of these

The vibrations of a transverse wave more

• In the same direction as the wave travels

• At the right angles to the direction of wave travel

• Above or below the moving wave

• Opposite to the direction of wave travel

Sound waves cannot travel in

• Air

• Water

• Steel

• A vacuum

• Sound can travel in all of these