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OverLord2011 [107]
3 years ago
6

Scientific laws and theories cannot change. They are absolute fact. True or false?

Physics
1 answer:
VladimirAG [237]3 years ago
3 0
The answer would be False, because theories change all the time.
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A load of 250 kg is hung by a crane's cable. The load is pulled by a horizontal force such that the cable makes a 30 angle to th
Anna [14]

Answer:

1250\sqrt{3}

Explanation:

Let's look at this in a simple manner, because it is.

The crane weights 250Kg. Okay.

Since it is hung, there is the acceleration of gravity being applied on it (10m/s²)

Since F = m * a

F = 250 * 10

F = 2500

Now we know that the downward Force is 2500N.

To find the force that is being applied on that 30° angle, we can multiply our 2500N by cos30°, which happens to be \frac{\sqrt{3}}{2}.

Therefore, the force pulling the box in the cable's direction is:

\frac{2500\sqrt{3} }{2}  = 1250\sqrt{3}

<em />

<em>If you have any questions feel free to comment.</em>

<em />

<em>Have a great one and mark brainliest if it helped, please</em>

8 0
2 years ago
A long wire carries a current 5 A from west to east. A magnetic compass pointing North is placed underneath the wire at a distan
Gemiola [76]

Answer:

no deflection

Explanation:

current is flowing from west to east. As the magnetic field of a long wire carrying current is circular, its direction will be north below the wire and south above the wire (according to the right hand rule). So, when the compass is placed underneath the wire, it will still point towards the north direction.

6 0
3 years ago
*PHYSICS HELP*
sveta [45]
My calculator is about 1cm thick, 7cm wide, and 13cm long.

Its volume is (length) (width) (thick) = (13 x 7 x 1) = 91 cm³ .

The question wants me to assume that the density of my calculator
is about  the same as the density of water.  That doesn't seem right
to me.  I could check it easily.  All I have to do is put my calculator
into water, watch to see if sinks or floats, and how enthusiastically. 
I won't do that.  I'll accept the assumption.

If its density is actually 1 g/cm³, then its mass is about 91 grams.

The choices of answers confused me at first, until I realized that
the choices are actually 1g, 10² g, 10⁴ g, and 10⁶ g.

My result of 91 grams is about 100 grams ... about 10² grams.

Your results could be different.
3 0
3 years ago
If a motorcycle covers 5km in 10 minutes , how far does it move in 1 second ?​
marissa [1.9K]

Answer:

A motorcycle moves 5km in 10 minutes(10×60s=600 seconds)

A motorcycle moves 5/600 km in 1 second.

A motorcycle moves 1/120 km in 1 second.( 5/600 = 1/120)

4 0
3 years ago
Visible light is the smallest band in the electromagnetic spectrum true or false.
bearhunter [10]
False, Gamma Rays are the smallest because gamma rays have the shortest wave length
4 0
3 years ago
Read 2 more answers
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