2 years ago

Check my answers for the physics questions above...

Physics

1 answer:

3241004551 [841]2 years ago

6 0

I believe you've answered them correctly :)

Good luck with your quiz!

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A wave has a wavelength of 9 mm and a frequency of 14 hertz. What is its speed?

lesantik [10]

Wavespeed = frequency x wavelength
= 14 x 9
= 126 mm/s
= 0.126 m/s

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2 years ago

The presence of which phenomenon proved the predictability of the big bang theory?

Law Incorporation [45]

The measurement of the expansion of the universe was what gave rise to the big bang theory and it's predictions.

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A car begins at rest at a stoplight. After the light turn green, the car begins to accelerate 5 m/s2 over the span of 3.6 second

trasher [3.6K]

Answer:

d=9m

Explanation:

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Elias observed a sample in the classroom. The sample was a liquid at room temperature. He performed a conductivity test and foun

Liula [17]

Answer:

Explanation:

Nonmetals are poor conduster to heat and electricity

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A 4.4 kg marble (really big heavy marble) is accelerating down an incline. When it reaches level ground it slows down to a stop

KengaRu [80]

Mass=4.4kg

acceleration=-1.74m/s^2

Use newtons second law

$\\ \rm\longmapsto Force=ma$

$\\ \rm\longmapsto Force=4.4(-1.74)$

$\\ \rm\longmapsto Force=-7.656N$

initial velocity=u

Final velocity=v=0

Acceleration=a=-1.74m/s^2

Time=t=1.27s

$\\ \rm\longmapsto a=\dfrac{v-u}{t}$

$\\ \rm\longmapsto u=v-at$

$\\ \rm\longmapsto u=0-(-1.74)(1.27)$

$\\ \rm\longmapsto u=1.74(1.27)$

$\\ \rm\longmapsto u=2.2m/s$

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2 years ago