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zavuch27 [327]
3 years ago
5

Define centre of mass​

Physics
1 answer:
Murljashka [212]3 years ago
8 0

Answer:

a point representing the mean position of the matter in a body or system.

Explanation:

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What is the surface area to volume ratio of this cube
tamaranim1 [39]

I can't see that cube from here.

But if the length of the side of the cube is ' K ' units,
then the surface area of the cube is  6K² units², and
the volume of the cube is  K³ units³.

The ratio of the surface area to the volume is

               (6K² units²) / (K³ units³)  =  (6) / (K units) .

So for example, if the side of the cube is 2 inches, then
the ratio of surface area to volume is  "3 per inch".

That's the answer.  I did the whole thing in order to earn
the points, but I don't expect you to understand much of it,
because I see from your username that you suck at math.
I'm sorry you decided that.  Now that you've put up the
brick wall, it'll be even harder for any math to find its way
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3 0
3 years ago
An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. The heavie
leva [86]

To solve the problem it is necessary to apply conservation of the moment and conservation of energy.

By conservation of the moment we know that

MV=mv

Where

M=Heavier mass

V = Velocity of heavier mass

m = lighter mass

v = velocity of lighter mass

That equation in function of the velocity of heavier mass is

V = \frac{mv}{M}

Also we have that m/M = 1/7 times

On the other hand we have from law of conservation of energy that

W_f = KE

Where,

W_f = Work made by friction

KE = Kinetic Force

Applying this equation in heavier object.

F_f*S = \frac{1}{2}MV^2

\mu M*g*S = \frac{1}{2}MV^2

\mu g*S = \frac{1}{2}( \frac{mv}{M})^2

\mu = \frac{1}{2} (\frac{1}{7}v)^2

\mu = \frac{1}{98}v^2

\mu = \frac{1}{g(98)(5.1)}v^2

Here we can apply the law of conservation of energy for light mass, then

\mu mgs = \frac{1}{2} mv^2

Replacing the value of \mu

\frac{1}{g(98)(5.1)}v^2  mgs = \frac{1}{2}mv^2

Deleting constants,

s= \frac{(98*5.1)}{2}

s = 249.9m

7 0
3 years ago
______ help keep plants from being eaten by animals.
yanalaym [24]
Thorns help keep plants from being eaten by animals.


8 0
3 years ago
Read 2 more answers
An electromagnetic wave can be described as a transverse magnetic wave moving
neonofarm [45]

Answer:

(B) perpendicular to and in the same direction as the transverse electric wave

5 0
3 years ago
CONVERT 5 SOLAR DAYS INTO SECOND​
zhannawk [14.2K]

Answer:

5 solar days is 432,000 seconds

Explanation:

One solar day is the time the meridian of the Sun crosses passes through a specified place.

Due to the elliptical orbit of the Earth round the Sun, one average solar day on Earth is equivalent to 24 hours with some days longer and some days shorter each by a few minutes

Therefore, we have;

5 solar days = 5 × 24 hours × 60 minutes/hour × 60 seconds/minute = 432,000 seconds

5 solar days = 432,000 seconds

7 0
3 years ago
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