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3 years ago

A standing wave is one which travels through space indefinitely. true or false?

2 answers:

kramer3 years ago

6 0

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.

The statement "<span>A standing wave is one which travels through space indefinitely." is false.</span>

VikaD [51]3 years ago

6 0

false false false false false false, they told me i needed 20 charecters so yea.

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Which statements describe acceleration? Check all that apply.

DiKsa [7]

Answer:

Negative acceleration occurs when an object speeds up in the negative direction.

Positive acceleration occurs when an object speeds up in the positive direction.

Explanation:

This might be wrong but I get some points for a answer..

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3 years ago

What can change shape and volume? PLz help :)

Rasek [7]

Gas has no certain shape However, its Volume can change with Differences in Heat and Pressure.

6 0

3 years ago

Read 2 more answers

a0.155 kg arrow is shot from ground level, upward at 31.4 m/s. what is its kinetic energy (ke) when it is 30.0 m above the groun

swat32

The kinetic energy (KE) of a 0.155 kg arrow that is shot from ground level, upward at 31.4 m/s, when it is 30.0 m above the ground is 30.85 J

Assuming air friction is negligible,

a = - 9.8 m / s²

u = 31.4 m / s

s = 30 m

v² = u² + 2 a s

v² = 31.4² + ( 2 * - 9.8 * 30 )

v² = 985.96 - 588

v² = 397.96 m / s

KE = 1 / 2 m v²

KE = 1 / 2 * 0.155 * 397.96

KE = 0.0775 * 397.96

KE = 30.85 J

Therefore, the kinetic energy ( KE ) when it is 30.0 m above the ground is 30.85 J

To know more about kinetic energy

brainly.com/question/24360064

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5 0

2 years ago

2. A small piece of dust is located in between two oppositely charged parallel plates where there exists a uniform electric fiel

Alla [95]

Answer:

The total charge is $q = 1.6*10^{-4}C$

The change in potential energy is $\Delta U = -4*10^{-2}J$

The height is $h= 8.2cm$

Explanation:

From the question we are told that the

The magnitude of electric field is $E = 5000N/C$

The number of proton is $N_p = 1*10^{15}$

The distance between the plates is $d = 5cm = \frac{5}{100} = 0.05m$

The total charge can be mathematically represented as

$q = N_p * e$

Where e is the charge on one proton which has a value of $=1.6*10^{-19}C$

Substituting values

$q = 1 *10^{15} * 1.6*10^{-19} = 1.6 *10^{-4}C$

The change in potential energy is mathematically represented ads

$\Delta U = -(qE)d$

where the negative sign shows that the work done by the electric force is against the electric field

Substituting values

$\Delta U = - 1.6*10^{-4} * 5000 * 0.05$

$= -4*10^{-2}J$

The mass of the bead is given as 0.05kg

The change in potential due to gravity is mathematically given as

$\Delta U = -mgh$

the negative sign is due to the fact that the height is decreasing

And $g =9.8m/s^2$

Making h the subject

$h = \frac{\Delta U}{mg}$

Substituting values

$h = \frac{4*10^{-2}}{0.05 * 9.8}$

$=0.081m = 0.082 *100 = 8.2cm$

4 0

4 years ago

What is the distance between lines on a diffraction grating that produces a second-order maximum for 760-nm red light at an angl

Nataly [62]

The condition for maximum intensity is the same as that for a double slit. However, angular separation of the maxima is generally much greater because the slit spacing is so small for a diffraction grating. For a diffraction grating with lines/mm = lines/inch, the slit separation is d = micrometers = x10^ m.

8 0

2 years ago