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4 years ago

9

If sounds actually moves like a longitudinal wave, then why did our oscilloscoop on our phone pick up sound waves as a transvers

e wave? What do you think?

1 answer:

SIZIF [17.4K]4 years ago

5 0

Sound from vibrating body produces longitudinal wave in air

Mark as brainlest please

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How do scientist check repeatability of results

tester [92]

Answer:

If research results can be replicated, it means they are more likely to be correct.

4 0

3 years ago

Read 2 more answers

How long does it take the baton to complete one spin

sweet [91]

The time it takes the baton to complete one spin will be 0.56 s. Option B is correct.

<h3>What is centripetal acceleration?</h3>

The acceleration needed to move a body in a curved way is understood as centripetal acceleration.

The direction of centripetal acceleration is always in the path of the center of the course. The total acceleration is the result of tangential and centripetal acceleration.

The entire question is;

"How long does it take the baton to complete one spin?

A twirler’s baton is 0.76 m long and spins around its center. The end of the baton has a centripetal acceleration of 47.8 m/s2.

a.0.31 s

b.0.56 s

c.4.3 s

d.70 s"

The given data in the problem;

Length of baton,L = 0.76 m

Centripetal acceleration, $\rm F_c=47.8 \ m/s^2$

The centripetal acceleration is found by;

$a= \frac{4 \pi^2R}{T^2}$

Substitute the given value:

$\rm 47.82= \frac{4 \pi^2\times 0.38}{T^2} \\\\ 47.82\times T^2 = 4(3.14)^2 \\\\T = 0.56 s$

The time it takes the baton to complete one spin will be 0.56 s.

Hence option B is correct.

To learn more about centripetal acceleration, refer to the link;

brainly.com/question/17689540

#SPJ1

8 0

2 years ago

Assume that Young’s modulus for a new material is known to be 2.25 × 1011 /2

Lady bird [3.3K]

Answer:

Maximum force, $F_{max} = 42 kN$

Explanation:

Maximum Stress, $\sigma_{max} = 2.1 * 10^{7} N/m^{2}$

The diameter of the material, d = 50.5 mm = 0.0505 m

The area of the material, $A = (\pi d^{2} )/4$

$A = \frac{\pi * 0.0505^{2} }{4} \\A = 0.002 m^{2}$

The formula for the maximum stress that the material can take is given by:

$\sigma_{max} = \frac{F_{max} }{A} \\2.1 * 10^7 = \frac{F_{max} }{0.002}\\F_{max} = 2.1 * 10^7 * 0.002\\F_{max} = 4.2 * 10^4 N\\F_{max} = 42 kN$

4 0

3 years ago

A ball is thrown upward at a velocity of 20m/s. What is the velocity after 3 seconds?

Anit [1.1K]

This is a perfect problem to use positive and negative velocities.

Let's call the positive direction the direction that points UP.
Then the negative direction is the one that points down.

The acceleration of gravity on Earth is 9.8 m/s² down. That means
that any object with no forces on it except gravity gains 9.8 m/s of
speed downward every second.

OK. Ready to go to work:

The ball's initial velocity is +(up)20.0 m/s .
Every second after the toss, the ball has -(down)9.8 m/s more velocity.

The ball's velocity after 3 seconds is

+20 + 3(-9.8) =

20 - 29.4 = - 9.4 m/s .

That means it's velocity at that time is 9.4 m/s pointing down.

6 0

3 years ago

Which of the following best describes the location of the

marshall27 [118]

Answer:

The mantle exists above the crust of the earth

8 0

3 years ago