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3 years ago

What is occurring when two waves traveling along the same medium meet and cancel each other out?

Physics

1 answer:

liberstina [14]3 years ago

5 0

Answer:

Destructive interference

Explanation:

Destructive interference occurs when two waves traveling along the same medium meet and cancel each other out. The resultant wave has a smaller amplitude than the individual waves. In this case, the maxima of two waves are 180 degrees out of phase.

Hence, the correct option is (A) "destructive interference"

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A satellite in the shape of a solid sphere of mass 1,900 kg and radius 4.6 m is spinning about an axis through its center of mas

algol [13]

Answer:

6.3 rev/s

Explanation:

The new rotation rate of the satellite can be found by conservation of the angular momentum (L):

$L_{i} = L_{f}$

$I_{i}*\omega_{i} = I_{f}*\omega_{f}$

The initial moment of inertia of the satellite (a solid sphere) is given by:

$I_{i} = \frac{2}{5}m_{s}r^{2}$

Where $m_{s}$ : is the satellite mass and r: is the satellite's radium

$I_{i} = \frac{2}{5}m_{s}r^{2} = \frac{2}{5}1900 kg*(4.6 m)^{2} = 1.61 \cdot 10^{4} kg*m^{2}$

Now, the final moment of inertia is given by the satellite and the antennas (rod):

$I_{f} = I_{i} + 2*I_{a} = 1.61 \cdot 10^{4} kg*m^{2} + 2*\frac{1}{3}m_{a}l^{2}$

Where $m_{a}$ : is the antenna's mass and l: is the lenght of the antenna

$I_{f} = 1.61 \cdot 10^{4} kg*m^{2} + 2*\frac{1}{3}150.0 kg*(6.6 m)^{2} = 2.05 \cdot 10^{4} kg*m^{2}$

So, the new rotation rate of the satellite is:

$I_{i}*\omega_{i} = I_{f}*\omega_{f}$

$\omega_{f} = \frac{I_{i}*\omega_{i}}{I_{f}} = \frac{1.61 \cdot 10^{4} kg*m^{2}*8.0 \frac{rev}{s}}{2.05 \cdot 10^{4} kg*m^{2}} = 6.3 rev/s$

Therefore, the new rotation rate of the satellite is 6.3 rev/s.

I hope it helps you!

5 0

4 years ago

Fix this problem please.

Vinil7 [7]

Answer:

In my knowledge....

Option E.........

Explanation:

I have no doubts it is option E 350N

4 0

3 years ago

An object in motion will have a speed which is a scaler , or ( blank ) which is a vector .

mylen [45]

Answer:

Velocity

Explanation:

Objects in motion usually have a speed which is scalar or velocity which is a vector.

A scalar quantity is one with magnitude but has no directional attribute.

A vector quantity is one with both magnitude and directional attribute.

Speed is a scalar quantity that describes the magnitude of motion a body accrues.

Velocity is a vector quantity that describes both the magnitude of motion and the direction of motion in a body.

3 0

3 years ago

What’s the correct answer, d is false .

Alina [70]

I'd Say B :) Your Welcome LOL!!!!!

4 0

4 years ago

Requirement 3. If Sierra Design wants to earn profits equal to 20% of sales revenue, how much (what total fee) should the co

oksano4ka [1.4K]

Answer:

sales revenue = total costs/0.8 ; Client 1 Sales revenue = $177,550/- ; Sales revenue = $10,691/-

Explanation:

Assumptions:

As total job costs are not provided so they would be assumed(using similar question) as:

client 1 = T.C ; total job costs = $142,040.00

client 2 = G.G.Com ; total job costs = $8553.00

Given Data:

Profit = 20% of sales revenue

Solution:

As we know that

total cost = sales revenue - profit

total cost = sales revenue - 0.2*sales revenue (given: profit=0.2sales revue)

By arrangiing this equation, we get

sales revenue = total costs/0.8

Now for Client 1(T.C)

Sales revenue = total costs/ 0.8

= 142040/0.8

Sales revenue = $177,550/-

Now for Client 2 (G.G.Com)

Sales revenue = total costs/ 0.8

= 8553/ 0.8

Sales revenue = $10,691/-

6 0

3 years ago