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2 years ago

If our solar system's Sun was half the mass as it is now, what would happen to the orbit of the Earth

1 answer:

5 0

Essentially, an increase in mass means an increase in gravity, while a decrease in mass means a decrease in gravity. So if the Sun spontaneously lost half its mass (gasp, shudder, the horror!) then its gravitational pull on Earth would lessen as well, ultimately changing the very nature of our orbit around the Sun.
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Explain the differences between a physical and chemical change, and give examples of each.

mrs_skeptik [129]

Chemical change: a reaction/event where the chemicals/elements present before the change are NOT the same molecules present after the change.
For example, combustion reactions such as the burning of wood or rubbing alcohol are examples of chemical change. The reactants before the combustion of rubbing alcohol are CH3O (rubbing alcohol) and O2 oxygen (oxygen). The molecules present after the combustion reaction are CO2 (carbon dioxide) and H2O (water vapor).

Physical Change: a change in structure or state of a substance but, after the change the material is the same material that we started with. One example would be breaking a glass bottle by dropping it. The glass is now in smaller pieces than when we started, but the glass molecules are still glass molecules.

Hope this helped! Leave any questions you still have for me in the comments below!

4 0

3 years ago

Someone please help me for a brainliest but it has to be correct

Katarina [22]

The answer is 34 you have to add the numbers and divide them by how many numbers there are

7 0

3 years ago

Read 2 more answers

How long dose it take to accelerate an object from rest to 12m/s if acceleration was 3m/s2?

lakkis [162]

2 seconds longer because 3m/s is squared and 12m/s isn’t squared I’m pretty sure at least

7 0

3 years ago

Read 2 more answers

Jerome plays middle linebacker for souths varsity football team. In a game against cross-town rival north, he delivered a hit to

Makovka662 [10]

The momentum change of the running back is - 664.2 kg m/s or 664 west.

<u>Explanation:</u>

Momentum is defined as the change in velocity of any object along with its mass. So mathematically, momentum can be derived using the product of mass with the change in velocity.

$\text { Momentum change }=m \times \Delta v$

As here mass is given as 82 kg and the initial velocity was 5.6 m/s and final velocity is 2.5 m/s.

Initial Momentum = $m \times \text { initial velocity }=82 \times 5.6=459.2 \mathrm{kg} \mathrm{m} / \mathrm{s}$

Final Momentum = $m \times \text { final velocity }=82 \times(-2.5)=-205 \mathrm{kg} \mathrm{m} / \mathrm{s}$

Momentum change = Final Momentum - Initial Momentum

Momentum change = - 205 - 459.2 = - 664.2 kg m/s or 664 west

Thus, the changing momentum is -664.2 kg m/s. The negative sign indicates that the momentum is acting in the opposite direction on changing in the direction of velocity.

7 0

2 years ago

The pilot of an airplane traveling 45 m/s wants to drop supplies to flood victims isolated on a patch of land 160 m below. The s

Sidana [21]

Answer:

Explanation:

A object dropped from a plane from a certain height will follow a parabolic trajectory because it has a horizontal velocity equal to plane's velocity.

So, if supplies are to be dropped from a plane from a height of 160 m, let us calculate the time it takes to reach the ground.

$H=\frac{1}{2}gt^{2}\\160=\frac{1}{2}\times10\times t^{2}\\t=\sqrt{32}=4\sqrt{2}\text{ }sec$

So, in this time, the supply moves a horizontal distance of $(4\sqrt{2}\text{ }sec)\times(45\text{ }\frac{m}{sec})=180\sqrt{2}\text{ }m=254.56\text{ }m$ .

∴ The supply must be dropped when the plane is 255 m away.

5 0

2 years ago