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myrzilka [38]
3 years ago
12

: To determine the focal length of a lens, the following except _ is needed

Physics
1 answer:
mixer [17]3 years ago
4 0
The answer should besiphon
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PLEASEEE HELP ASAP!!!!!
aivan3 [116]

Answer:

h = 2.15 m

Explanation:

We can use the third equation of motion here to find out the height from which the cat fell that is the height of the refrigerator.

2gh = v_{f}^2 - v_{i}^2

where,

g = acceleration due to gravity = 9.81 m/s²

h = height of refrigerator = ?

vf = final speed of cat = 6.5 m/s

vi = initial speedof cat vertically = 0 m/s

Therefore,

2(9.81\ m/s^2)h = (6.5\ m/s)^2 - (0\ m/s)^2\\h = \frac{(6.5\ m/s)^2}{(2)(9.81\ m/s^2)}

<u>h = 2.15 m</u>

3 0
3 years ago
1. If the atomic number is 25, how many protons does it have?
ololo11 [35]
1. 25
2. 55-25 = 30

Hope this helps! :)
7 0
3 years ago
In _______ atomic model, negative electrons orbit the positively charged nucleus.
Shalnov [3]
In (A. Dalton's) atomic model, negative electrons orbit the positively charged nucleus.
8 0
3 years ago
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Answer the Question Correctly and get brainliest and thank you
PtichkaEL [24]

Answer:

D. are made of cell

Explanation:

first , cell simply means the basic and structural unit of life ......All living organisms have cells

It could be Unicellular(amoeba), colonial form ( volvox) , filamentous form(spirogyra) or multicellular .......

3 0
3 years ago
(a) Find the acceleration of B.<br>(b) Find the tensions, T1 and T2, in the strings.
Ann [662]

i believ that the answer would be

the acceleration of B is 0.2

6 0
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