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Nastasia [14]
3 years ago
15

A carpenter uses a crowbar to remove the top of a box. If the top has a resistance of 500 Newtons, and the carpenter applies an

effort force of 100 Newtons, what is the mechanical advantage of the crowbar?
Physics
1 answer:
Jet001 [13]3 years ago
8 0

Answer:

5

Explanation:

MA= load /effort

MA=500/100.

MA= 5

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Explain how artists use monocular cues to depth perception described in the text to create an impression of three dimensions on
lana66690 [7]

Answer:

The relative size of an object serves as an important monocular cue for depth perception. It works like this: If two objects are roughly the same size, the object that looks the largest will be judged as being the closest to the observer. This applies to three-dimensional scenes as well as two-dimensional images.

Explanation:

6 0
3 years ago
How did the theory of plate tectonics come to be a theory?
dolphi86 [110]

Explanation:

Plate tectonics is the idea that the earth's outer solid crust (the lithosphere) is fragmented into a few dozen "plates" that pass relative to each other across the earth's surface, like ice slabs on a lake. 

A scientist named Alfred Wegener in 1915 proposed that the continents rammed through ocean basin crust, which would clarify why the shapes of many coastlines (such as South America and Africa) seem to match together like a puzzle.

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3 years ago
Two students are having a discussion about the Moon. The first student claims that we always see only one side of the Moon and t
iren [92.7K]

Answer:

We should only agree with the first statement of the first student but not with the second part of his statement. While as the statement of the other student is completely wrong.

Explanation:

The earth and the moon are locked in a process known as tidal locking. Tidal locking occurs when any object which revolves around other object takes the same amount of time to rotate around it's own axis as it takes to revolve around the planet.

This is exactly the case with moon and the earth system ,the moon is tidally locked with earth thus we cannot see the other side of the moon but this side is not dark as claimed by the first student but this side of the moon is also illuminated by the sunlight as the face of moon that we are able to see.

The second student is wrong as we cannot see the other side of moon from earth.

7 0
3 years ago
Why do you sometimes get shocked by static electricity? Explain how it happens and give an example.
laiz [17]

Answer:

That tiny shock you feel is a result of the quick movement of these electrons. You can think of a shock as a river of millions of electrons flying through the air. ... Static electricity happens more often during the colder seasons because the air is drier, and it's easier to build up electrons on the skin's surface.

Explanation:

Don't copy excatly but here it is.

5 0
3 years ago
If a 5,000 investment earn $1,575 interest over over 18 years what is the annual interest rate
ss7ja [257]

Answer:

I = 1575 / 5000 = 31.5 % interest on investment

(1 + i)^18 = 1.315      where i interest is earned per year

One can use logs or

1 + i = 1.315^1/18  = 1.0153

So the annual interest rate is .0153   or 1.53%

Or

5000 (1 + i)^18 = 6575

(1 + i)^18 = 1.315

18 log (1 + i) =  log 1.315

log (1 + i) =  .006607

1 + i = 1.0153

i = .0153 = 1.53%

5 0
3 years ago
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