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stealth61 [152]
3 years ago
7

PLEASE HELP URGENT!!!!!!!!!!!!!

Physics
1 answer:
Nimfa-mama [501]3 years ago
4 0

c i think sorry if wrong

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If we could easily create machines or systems with no friction, what could we use them for?
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Answer:

We could make a frictionless generator.

Explanation:

This would change life by making the cost for energy next to zero

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2 years ago
6. A lumberjack is standing on a log floating on a lake. She starts from rest, then runs along the log to the end, when she jump
scoray [572]

Answer:

a) -3.267 m/s

b) 2.227 m/s

Explanation:

As per the conservation of momentum

m1v1 + m2v2=0

m1= mass of log

m2 = mass of lumber jack

v1 = velocity of log

v2 = velocity of lumber jack

a) Velocity of first log

-\frac{70*7}{150} = -3.267 m/s

b) m1v1 + m2v2 = m3v3

Velocity of log

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3 years ago
Asexual reproduction involves only one parent. The offspring of this type of reproduction have - F DNA identical to the DNA of t
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Answer:

DNA identical to the DNA of the parent

Explanation:

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3 years ago
Please write 4-5 sentences, please!! How would you describe the climate of Colorado? Find 1 piece of evidence from online to def
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Answer:

The climate in colorado is combination of high elevation, midlatitude, and continental interior geography results in a cool, dry, and invigorating climate. The average annual temperature for the state is 43.5 degrees Fahrenheit (F), which is 13.7 degrees below the global mean

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3 years ago
Because of interstellar dust, astronomers can see at most about 5 kpc into the disk of the galaxy at visual wavelengths. What pe
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96%

Explanation

Let A the total area of the galaxy, is modeled as a disc:

A = πR^2 = π (25 kpc)^2

And let a be the area that astronomers are able to see:

a = πr^2 = π(5 kpc)^2

The percentage that can be seen is equal to 100 times the ratio of the areas, of the galaxy and the "visible" part:

P = 100 a/A = (5/25)^2 = 100/25 = 4%

Therefore, the percentage of the galaxy not included, i.e. not seen is:

(100-4)% = 96%

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3 years ago
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