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sergeinik [125]
3 years ago
13

Help please! Thanks so much!

Physics
1 answer:
qaws [65]3 years ago
4 0
You pretty much just have to convert and be mindful of significant figures.

5 km = 3 miles
0.3 cm = 0.12 in
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The height of the Washington Monument is measured to be 170 m on a day when its temperature is 35.0°C. What will the change in i
Alecsey [184]

Answer:

The deformation is 0.088289 m

The final height of the monument is 170-0.088289 = 169.911702 m

Explanation:

Thermal coefficient of marble varies between (5.5 - 14.1) ×10⁻⁶/K = α

So, let us take the average value

(5.5+14.1)/2 = 9.8×10⁻⁶ /K

Change in temperature = 35-(-18) = 53 K = ΔT

Original length = 170 m = L

Linear thermal expansion

\frac{\Delta L}{L} = \alpha\Delta T\\\Rightarrow \Delta L=\frac{\alpha\Delta T}{L}\\\Rightarrow \Delta L=9.8\times 10^{-6}\times 53\times 170

The deformation is 0.088289 m

The final height of the monument is 170-0.088289 = 169.911702 m (subtraction because of cooling)

4 0
3 years ago
Which motion listed below matches the graph?
mote1985 [20]
Bro I really think it might be c
7 0
3 years ago
Read 2 more answers
Thiết bị trao đổi nhiệt ngược chiều, nhiệt độ chất lỏng nóng vào là 310°C, ra là 115°c. Nhiệt độ chất lỏng lạnh vào là 25°c và r
Vika [28.1K]

Answer: 129.5 m

Explanation:

310 + 115 + 25 + 68 = 518

518 / 4 = 129.5 m

i think. Sorry if this is wrong

:)

5 0
3 years ago
The fishing pole shown here is an example of a lever. Which statement describes the fishing pole's mechanical advantage?
luda_lava [24]

Answer:

Explanation:

The person will exert a much larger force to take a fish out of the water than the fish itself weighs. The advantage of the fishing pole, however, is that it moves the fish a large distance, from the water to the boat or the shore.

8 0
2 years ago
I need help please please​
Brut [27]

Answer:

See the explanation for the answer.

Explanation:

Question 1: Both

Question 2: E

Question 3: P

Question 4: E

Question 5: E

Question 6: Both

Question 7: E

Question 8: Both

Question 9: E

Question 10: E

Question 11: E

Question 12: Both

Question 13: The three statements that the modern cell theory made were how in all organisms the cell is the smallest living unit, how all living things consist of cells, and that all cells are "created" from already pre-existing cells.

I think that these answers are correct. I'm sorry if they aren't, I tried my best with the assignment.

Have a lovely day!

6 0
3 years ago
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