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Mice21 [21]
3 years ago
8

PLEASE HELP!!!!!!!!!

Physics
2 answers:
Troyanec [42]3 years ago
7 0

Answer: Option (2) is the correct answer.

Explanation:

According to law of conservation of mass, mass can neither be created nor it can be destroyed but it can be converted into one form to another.

For example, when mass of a reactant in a chemical reaction is 15 grams then product formed by it will also weigh 15 grams.

This is means mass of the reactant has now converted into the mass of product according to law of conservation of mass.

Thus, we can conclude that 15 grams of products will be formed by the reaction.

nexus9112 [7]3 years ago
5 0
It’s 10 because when a reaction reacts it then goes down and lowers the reaction? Right
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How many stars are in our solar system?
Annette [7]

Answer:

there are over 100 billion stars in our galaxy.

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3 years ago
A 1,200 kg car travels at 20 m/s. what is it’s momentum ?
Montano1993 [528]

Answer:

24000 kg·m/s

Explanation:

Momentum is Mass x Velocity, so 1200 kg time 20 m/s =  24000 kg-ms/s

5 0
4 years ago
What does the term Milankovitch cycles most closely relate to?
Korvikt [17]
The term Milankovitch cycles most closely relate to periodic changes in Earth’s orbit and angle of tilt relative to sun. So for this question, the correct option is option “c”. Milankovitch affects actually deals with the effect of the changes in the earth’s movements with the change in the climatic conditions. Milankovitch was a Serbian geophysicist and also a great astronomer. His studies actually helped in relating the climatic changes with the changes in the tilt of the earth. He was the first person to mathematically prove this situation.


8 0
4 years ago
A merry-go-round makes one complete revolution in 5.3 s. A 48.5 kg child sits on the horizontal floor of the merry-go-round 2.7
Marianna [84]

Answer:183.94 N

Explanation:

Given

Time Period T=5.3 s

mass of child m=48.5 kg

Radius r=2.7 m

Velocity v=\frac{2\pi \cdot r}{T}

v=\frac{2\pi \cdot 2.7}{5.3}

v=3.20 m/s

Now Centripetal Force will be Balanced by Frictional Force

Centripetal Force F_c=m\cdot \frac{v^2}{r}

F_c=48.5\cdot \frac{3.2^2}{2.7}

F_c=183.94 N

therefore Friction Force is 183.94 N

4 0
3 years ago
On the surface of the earth the weight of an object is 200 lb. Determine the height of the
siniylev [52]

Answer:

The height of the  object is 5007.4 miles.

Explanation:

Given that,

Weight of object = 200 lb

We need to calculate the value of Gmm_{e}

Using formula of gravitational force

F=\dfrac{Gmm_{e}}{r^2}

Put the value into the formula

200=\dfrac{Gmm_{e}}{(3958.756)^2}

200\times(3958.756)^2=Gmm_{e}

Gmm_{e}=3.134\times10^{9}

We need to calculate the height of the  object

Using formula of gravitational force

F=\dfrac{Gmm_{e}}{r^2}

Put the value into the formula

125=\dfrac{200\times(3958.756)^2}{r^2}

r^2=\dfrac{200\times(3958.756)^2}{125}

r^2=25074798.5

r=\sqrt{25074798.5}

r=5007.4\ miles

Hence. The height of the  object is 5007.4 miles.

7 0
3 years ago
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