2 years ago

SELECT ALL THAT APPLY!! Which of the following are considered SIGNS that a chemical reaction occurred?

Physics

1 answer:

MAXImum [283]2 years ago

8 0

Answer:

Formation of a Precipitate

Unexpected Color Change

Formation of a Gas

Explanation:

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A radio station broadcasts its music with waves at a frequency of 7.34 x 10²Hz. These radio waves travel at a speed of 3.00x 10%

Lorico [155]

Answer:

See below

Explanation:

<u>I will use 3 x 10^8 m/s for speed or wave</u>

speed = wavelength * frequency

3 x 10^8 = w * 7.34 x 10^2 <====== are you sure this isn't KILO Hz ?

w = <u>408719. 3 meters </u>

4 0

1 year ago

Can anyone help me with this

Murrr4er [49]

Answer:

event s

Explanation:

the cow gets oxygen from the tree and proceeds to respirate.

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2 years ago

What is the speed of a wave with 3Hz frequency and a wavelength of 9 m

SIZIF [17.4K]

Answer:

Given

Frequency (f) = 3Hz

Wavelength = 9 m

Speed = ?

Explanation:

we know

Speed = wavelength * frequency

= 9*3

= 27 m/ s

7 0

3 years ago

If a sprinter accelerates from rest to 12 m/s north , what is their change in velocity ?

natima [27]

Answer: It would be 12 m/s.

Explanation: It would be this because If you go from rest to sprint it would be 12 m/s. Also, I did this the other day.

5 0

3 years ago

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Two planets have the same surface gravity, but planet b has twice the radius of planet

vampirchik [111]

Planet A;
m = the mass
Let r = the radius

Planet B:
Let M = the mass
The radius is 2r (twice the radius of planet A)

The surface gravitational acceleration of planets A and B (they have the same surface gravity) are
$g= \frac{Gm}{r^{2}} \, and \, g= \frac{GM}{(2r)^{2}} \\\\ m= \frac{M}{4} \\\\ M=4m$

Answer: The mass of planet B is 4m.

3 0

3 years ago

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