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const2013 [10]
3 years ago
9

If the Earth was the size of a basketball, about 24 centimeters in diameter, about how thick is the Earth's crust?

Physics
1 answer:
zalisa [80]3 years ago
4 0
C)yea there you go hope that helped
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Which of these scientists had the greatest contribution to early microscopy?
attashe74 [19]

Answer:

b

Explanation:

I think im not really sure tho

7 0
3 years ago
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Explain whether the unit of work is a fundamental or derived unit
klasskru [66]

Answer:

answer here

Explanation:

the unit of work is fundamental unit because it doesn't depend on other units.

__________________

Thx

6 0
3 years ago
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Object is dropped from the top of a building that is 1125 m tall at the point when it’s speed is 30 m/s how far has it fallen
FrozenT [24]

-- Gravity makes a falling object fall 9.8 m/s faster every second.

-- So, it reaches the speed of 30 m/s in (30/9.8) = 3.06 seconds after it's dropped.

-- The distance an object falls from rest is D = 1/2 (acceleration) (time)²

D = 1/2 (9.8 m/s²) (3.06 sec)²

D = (4.9 m/s²) (9.37 sec²)

<em>D = 45.8 meters</em>

Notice that we don't care how high the building is.  The problem works just as long as the object can reach 30 m/s before it hits the ground.  That  turns out to be anything higher than 45.8 meters for the drop . . . maybe something like 13 floors or more.

Now I'll go a little farther for you !  Writing the last paragraph made me a little curious and uncomfortable.  So I went and looked up the world's tallest buildings . . . and I found out that this problem could never happen !

The tallest building in the world now is the Burj Khalifa, in  Dubai.  It has 163 floors, and it's 828 meters high !  That's 2,717 feet.  It's gonna be a long time before there's a building that's 1125 meters tall, like this problem says.  That's close to 3700 feet . . . I've had flying lessons where I wasn't that far off the ground !

4 0
3 years ago
Bob wants to measure the length of the red rectangle above. The ruler has 1 cm tick marks. Bob wants other scientists to have a
klasskru [66]

Answer:

1 cm ± 0.05 cm

Explanation:

A ruler is readable to ±0.05 cm. This implies that any measurement taken using the ruler could be uncertain by 0.05 cm above or below the true value.

Hence, ±0.05 cm  is called the uncertainty or the precision of the ruler.

We obtained this from the fact that the meter rule is graduated in units of centimetres (cm). This implies that the smallest scale division is 1 mm. Thus, the uncertainty of the meter rule is given by; Δx = smallest increment/2 = 1mm/2 = 0.5mm = 0.05cm.

8 0
3 years ago
Please help me! I don’t understand these types of problems.
alina1380 [7]

Answer:

60 m

Explanation:

also if u ever get stuck just look up displacment caculator it can help . Please give me brainlist

8 0
2 years ago
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