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kykrilka [37]
2 years ago
15

Conservation of energy

Physics
1 answer:
Aloiza [94]2 years ago
5 0
Find the kinetic energy using the formula E = 1/2(mv^2) where m = 17kg, v=18m/s, h=27m. Once you have found the answer, plug the answer as E, m =17kg, v=?, and h=27m. Now solve for v. Good luck
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Look at the graph below. Which elements together make up seven percent of the Earth’s crust? calcium and iron calcium and sodium
yaroslaw [1]
The graph is missing, however we can answer anyway.

In fact, this is the approximate percentage of the elements listed in the questions in the Earth's crust (data taken from wikipedia):
Iron 5.0 %
Calcium 3.6 %
Sodium 2.8 %
Potassium 2.6 %
Magnesium 1.5 %

of all of these, we see that the combination of two elements that makes up the closest number to 7% is calcium and sodium (3.6% + 2.8%=6.4%), therefore the correct answer is
Calcium and sodium.
4 0
2 years ago
You are pulling a child in a wagon. The rope handle is inclined upward at a 60∘ angle. The tension in the handle is 20 N.How muc
ahrayia [7]

Work is equal to the force applied times the displacement. Since you pull the wagon at constant speed this means that there is no acceleration on the wagon as it does not change speed. F=ma. Since a=0, F=0. Therefore no work has been done in this situation

3 0
3 years ago
I need help with this
mel-nik [20]
It’s 4. Definitely 4. 99% sure it’s 4.
4 0
2 years ago
Please need help with this
Stella [2.4K]

Answer:

D. The objects particles move faster

4 0
3 years ago
Read 2 more answers
If an object's kinetic energy is zero, what is its momentum?
hammer [34]
If the object's kinetic energy is zero, then due to in multiplication factor, it's momentum will also be equal to zero 'cause the velocity of the object must be Nil

In short, Your Answer would be: "Zero"

Hope this helps!
6 0
3 years ago
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