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suter [353]
3 years ago
15

Which waves can travel through space?

Physics
2 answers:
cricket20 [7]3 years ago
7 0

Answer:

A: Electromagnetic waves only

Explanation:

xz_007 [3.2K]3 years ago
4 0

Answer:

electromagnetic waves only

Explanation:

I just took the test, Hope it helps!

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Wнιcн deмonѕтraтeѕ condυcтιon
jekas [21]

C.) cool feet walking across a hot pavement.



The reason because the other ones deals with radiation. Only C.) is the right answer because the feet is touching the hot pavement which is conduction. 
3 0
4 years ago
Plz Help ima fail science... <br> 25 points.
Neko [114]
Search up criterion and look at the examples and then read it and then make it in your own words
8 0
3 years ago
A uniform solid ball with a mass , M, is placed at the top of an inclined plane and released. What will be the velocity of the b
eimsori [14]

Answer:v=\sqrt{\frac{10}{7}\cdot gH}

Explanation:

Given

Mass of ball is M

Height of incline is H

Here conservation of energy will provide the velocity at bottom

Energy at top of incline plane =MgH

Energy at bottom=Kinetic energy+Rotational energy

Assuming Pure rolling we can write

v=\omega R

where v=velocity of ball

\omega=angular velocity of ball

R=radius of ball

E_b=\frac{1}{2}Mv^2+\frac{1}{2}I\omega ^2

where I=moment of inertia of ball

I=\frac{2}{5}MR^2

E_b=\frac{1}{2}Mv^2+\frac{1}{2}\times \frac{2}{5}MR^2\times (\frac{V}{R})^2

E_b=\frac{7}{10}Mv^2

Now ,

MgH=\frac{7}{10}Mv^2

v=\sqrt{\frac{10}{7}\cdot gH}

8 0
3 years ago
Three points A, B, and C of unknown charges are at the corners of an equilateral triangle.
nasty-shy [4]
Answer: option d. 

Q_A= \frac{1}{2} Q_B=- \frac{1}{3} Q_C

Explanation:


1) The direction of the field lines inform about the sign of the charges.

The field lines <span>extend from the positive charges to the negative charges, so you can conclude that the charge C is positve and both charge A and charge B are negative:
</span><span>
</span><span>
</span><span>Charge C: positive
</span><span>
</span><span>Charge A: negative
</span><span>
</span><span>Charge B: netative
</span>

2) The density of the lines (number of lines in a region) inform about the magnitude of the electric field.

Since the charges are at the same distance, the magnitude of the electric field informs directly about the magnitude of the force and that about the magnitude of the charges.

Since, there are the double of lines between C and B than between C and A, the magnitude of charge B is the double than the magnitud of charge A.

From the five options given (a throug e) the only that is consistent with that charges A and B have the same sign, that charge C has different sign, and that charge B is the double of charge A is:

Q_A= \frac{1}{2} Q_B=- \frac{1}{3} Q_C
3 0
3 years ago
What forces keep an air hockey puck hovering motionless above an air hockey table?
Mnenie [13.5K]
<span>C. the puck's weight and the air blowing </span>
4 0
3 years ago
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