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3 years ago

We can block light by placing obstacles in its path, but it’s much more difficult to block sound. Why?

2 answers:

8 0

It's harder to block sound because sound waves and transverse waves, causing the sound to bounce off objects. This isn't the same with light. Hope that helps.

rjkz [21]3 years ago

5 0

All we have to do is focus on what you want to hear and you can tell your mind to block everything out and its very easy to block light than noise all you have to do is focus

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Suppose a yo-yo has a center shaft that has a 0.230 cm radius and that its string is being pulled.

Fofino [41]

Answer:

Part a)

$\alpha = 782.6 rad/s^2$

Part B)

$\omega = 587 rad/s$

Part c)

$a_t = 24.3 m/s^2$

Explanation:

Part a)

As we know that

$a = R \alpha$

so we will have

$a = 1.80 m/s^2$

$R = 0.230 cm$

$\alpha = \frac{a}{R}$

$\alpha = \frac{1.80}{0.230 \times 10^{-2}}$

$\alpha = 782.6 rad/s^2$

Part B)

Angular speed of the yo-yo

$\omega = \alpha t$

so we have

$\omega = 782.6 \times 0.750$

$\omega = 587 rad/s$

Part c)

Tangential acceleration is given as

$a_t = R \alpha$

$a_t = (3.10 \times 10^{-2})(782.6)$

$a_t = 24.3 m/s^2$

6 0

4 years ago

An object in motion will stay in motion unless acted upon by what type of force

coldgirl [10]

An object will stay in motion unless acted upon by an UNBALANCED force.

8 0

3 years ago

Read 2 more answers

Can someone help me answer this pls I’ll give brainliest

hammer [34]

Answer: I think the answer is Non-foliated if it is wrong i am so sorry

don't forget to drop a heart.

Explanation:

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3 years ago

One thing a person can do to reduce his or her water footprint is to use less water every day. If each American was to reduce hi

Gwar [14]

Answer:

Annual water footprint for a typical American in m3 − 2×365 m3

Explanation:

We need the annual water footprint for a typical American first. Then, if each American was to reduce his or her daily water use by 2 m3, this would mean they would reduce his or her annual water use by 365×2 m3, since there are 365 days in a year, and this is the quantity that one needs to substract from the given annual water footprint for a typical American, also measured in m3.

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3 years ago

State the particles of matter

OleMash [197]

Answer:

Matter can exist in one of three main states: solid, liquid, or gas. Solid matter is composed of tightly packed particles. A solid will retain its shape; the particles are not free to move around. Liquid matter is made of more loosely packed particles.

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3 years ago