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bazaltina [42]
2 years ago
11

Plzzzzzzzzzzzzzzzzz help

Physics
1 answer:
makkiz [27]2 years ago
3 0

Answer:

a or b

Explanation:

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Jake calculates that the frequency of a wave is 230 hertz, and its wave is moving at 460 m/s. What is the wavelength of the wave
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Wavelength = (speed) / (frequency) = (460 m/s) / (230/sec) = <em>2 meters</em>


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3 years ago
A vertical spring stretches 4.0 cm when a 12-g object is hung from it. The object is replaced with a block of mass 28 g that osc
marin [14]

Answer:

Time period of the osculation will be 0.0671 sec  

Explanation:

It is given a vertical spring is stretched by 4 cm

So change in length of the spring x = 4 cm = 0.04 m

Mass which is hung from it m = 12 gram = 0.012 kg

Sprig force will be equal to weight of the mass

So kx=mg

k\times 0.04=0.012\times 9.8

k = 244.7 N/m

Now new mass is m = 28 gram = 0.028 kg

So time period with new mass will be

T=2\pi \sqrt{\frac{m}{k}}

=2\times 3.14 \sqrt{\frac{0.028}{244.7}}=0.0671sec

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3 years ago
If a rock sample has a mass of 1.17 g and a volume of 0.33 cm3, what type of rock is it?
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The correct answer is diamond

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If you drop a silver dollar off a building and it hits the ground in 10 seconds, how fast was the coin going just before?
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V = u + at 
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Which layer of the earth can be seen from the open hole
umka21 [38]

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the inner core

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