3 years ago

HELP PLEASE HERE IS THE IMAGE

Physics

2 answers:

kari74 [83]3 years ago

3 0

Answer:

I am pretty sure it's E because it splits through every layer

Brums [2.3K]3 years ago

3 0

The answer is e good luck

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4. A metal fork has a density of 7.8 g/cm ³. Is this fork made up of aluminum?

Morgarella [4.7K]

No, aluminum has a density near 2.7 g/cm^3
<span>7.8 g/cm^3 is near the density of iron (or in the case of a fork, steel).
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5 0

4 years ago

You watch a distant lady driving nails into her front porch at a regular rate of 1 stroke per second. You hear the sound of the

Igoryamba

Answer:

λ = 1360 m

Explanation:

Given data:

frequency of driving nails is given as 1 stroke per second mean at every 0.25 sec she hit the nails

speed of sound is given as 340 m/s

we know that the wave equation is given as

Speed = frequency × wavelength,

v = f × λ

where,

v = speed in meters/second (m/s)

f = frequency in Hertz (Hz)

substituing value to get wavelength of her driving nails

$340 m/s = (1Hz)\times \lambda$

$\lambda = \frac{340}{0.25}$

λ = 1360 m

4 0

3 years ago

Read 2 more answers

How are metal bridges built to cope with changes of temperature?

nirvana33 [79]

As the metal expands as does the road bed so neither really effevts those foing over the bridge. as it is hot the metal will expand and so will most tarmac on roads.

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3 years ago

Which nucleus completes the following equation?<br> 212 86 Rn-> 4 2 He+?

Inessa [10]

Answer:

Explanation:

208+4=212

84+2=86

The correct answer is A

3 0

2 years ago

i got the right answer for this question (pretty sure i guessed or just asked me teacher the answer?) but can someone explain ho

Bingel [31]

Well for you to get 980 Hz you divided 344 m/s with .35 m

6 0

3 years ago