IB Physics

In the 1910's Vesto Slipher analysed the spectra of “spiral nebulae” and found they were ___

• dimmer than expected

• missing spectral lines

• highly blueshifted

• highly redshifted

Tags

NGSS.HS-ESS1-2

In the 1920s Georges Lemaître proposed on theoretical grounds that the universe was ___

• contracting

• expanding

• static

• dying

Tags

NGSS.HS-ESS1-2

Lemaître imagined everything in the cosmos squeezed into one infinitely dense blob called ___

• a “primeval atom” or the “cosmic egg”

• a “first speck” or the “universal onion”

• a “pristine point” or the “measureless cell”

• an “original crumb” or the “vast seed”

Tags

NGSS.HS-ESS1-2

When the Universe was a tiny dot it would’ve been unimaginably, ___

• highly blueshifted

• highly redshifted

• chillingly cold

• hellishly hot

Tags

NGSS.HS-ESS1-2

What is the unit of electrical resistance?

• Volt

• Ampere

• Ohm

• Watt

Which of the following is a correct representation of Ohm's Law?

• All of the above

What is the term used to describe the opposition that a device or material offers to the flow of direct current?

• Resistance

• Capacitance

• Inductance

• Conductance

The sudden expansion of the Universe from a dense point was coined “the Big Bang” by which astronomer?

• Arno Penzias

• Fred Hoyle

• Robert Wilson

• Edwin Hubble

Tags

NGSS.HS-ESS1-2

How long does it take light from the Sun to reach the Earth?

• about 8 seconds

• about 8 minutes

• about 8 hours

• about 8 days

Tags

NGSS.MS-ESS1-1

When we look at Alpha Centauri, the nearest star system to us, we see it as it was ___

• 4.3 minutes ago

• 4.3 hours ago

• 4.3 days ago

• 4.3 years ago

Tags

NGSS.HS-PS4-3