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2 years ago

If you had a planet to choose from to live in what would it be?

Physics

2 answers:

Alja [10]2 years ago

8 0

I would personally like to live on mars because it is like our temperature, but a little bit colder.

postnew [5]2 years ago

4 0

I personally would live on Mars cuz that is red cuz

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How many 1140 nm long molecules would you have to line up end to end to stretch a distance of 158 miles?

dezoksy [38]

Answer:

221754385964.9123

Explanation:

Convert miles to nanometer

1 mile = 1.6 km

1 km = 1×10³×10³×10³×10³ nm

1 mile = 1.6×10¹² nm

So,

158 miles = 158×1.6×10¹² = 252.8×10¹² nm

Length of each molecule = 1140 nm

Number of molecules = Total length / Length of each molecule

$\text{Number of molecules}=\frac{252.8\times 10^{12}}{1140}\\\Rightarrow \text{Number of molecules}=221754385964.9123$

There are 221754385964.9123 number of molecules in a stretch of 158 miles

3 0

3 years ago

An object of unknown mass is initially at rest and dropped from a height h. It reaches the ground with a velocity v1 . The same

Hatshy [7]

Answer:

$v_2=\sqrt{2}v_1$

Explanation:

The velocity v₁ can be calculated with the kinematic formula:

$v_1^{2} =v_0^{2} +2gh$

Since the object is initially at rest, v₁ becomes:

$v_1=\sqrt{2gh}$

Where g is the acceleration due to gravity. Now, the velocity v₂ can be calculated with the same formula, but now the initial velocity is v₁:

$v_2^{2}=v_1^{2} +2gh$

Substituting v₁ in this expression and solving for v₂, we get:

$v_2^{2}=(\sqrt{2gh} )^{2} +2gh=4gh\\\\\implies v_2=\sqrt{4gh}=2\sqrt{gh}$

Now, dividing v₂ over v₁, we get the expression:

$\frac{v_2}{v_1}=\frac{2\sqrt{gh} }{\sqrt{2gh}}=\sqrt{2}\\ \\\implies v_2=\sqrt{2}v_1$

It means that v₂ is √2 times v₁.

4 0

3 years ago

What is kepler-10b ?

Stolb23 [73]

Answer:

is the first confirmed terrestial planet to have been discovered outside the solar system by the kepler space telescope

Explanation:

3 0

2 years ago

Read 2 more answers

9/10 in percents. Examples please, at least 2.

Len [333]

Answer:

90/100%, 9/10%

Explanation:

These represent 9 of 10 parts.

Hope this answer helps you out.

8 0

3 years ago

Read 2 more answers

A swimmer can swim 4.00 km/h in still water. He heads south across a river that flows east at 2.00 km/h. The river is 0.500 km w

sveticcg [70]

I don't really feel like doing the work, but in essence you have to find the y-component of the water's velocity and subtract that from 4

8 0

2 years ago