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Rama09 [41]
2 years ago
10

The first element on the periodic table of elements is helium true of false

Physics
1 answer:
makvit [3.9K]2 years ago
8 0

Answer:

false

Explanation:

it's hydrogen. also hydrogen has one proton and stuff and helium two

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The sticky substances in cigarettes that coat the lining of the<br> lungs are _____.
Svetach [21]

Answer:

Tar

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5 0
2 years ago
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Throw two balls from the same height at the same time at an initial speed of 20 m/s. One is thrown vertically down, while the ot
labwork [276]

The time difference between their landing is 2.04 seconds.

<h3>Time of difference of the two balls</h3>

The ball thrown vertical upwards will take double of the time taken by the ball thrown vertically downwards.

Time difference, = 2t - t = t

t = √(2h/g)

where;

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  • g is acceleration due to gravity

Apply the principle of conservation of energy;

¹/₂mv² = mgh

h = v²/2g

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h = (20²)/(2 x 9.8)

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<h3>Time of motion</h3>

t = √(2 x 20.41 / 9.8)

t = 2.04 s

Thus, the time difference between their landing is 2.04 seconds.

Learn more about time of motion here: brainly.com/question/2364404

#SPJ1

6 0
1 year ago
For a cosine function with amplitude A=0.75 and period T=10, what is y(4)?
mixer [17]
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y(4) = 0.75 sin (4π/5) = 0.4408389392... ≈ 0.441</span><span>
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8 0
2 years ago
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Screws and wedges are modified blank
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This is what I know 
<span>Splitting securing A wedge is a triangular shaped tool, a compound and portable inclined plane, and one of the six classical simple machines. </span>
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3 years ago
If light moves at a speed of 299,792,458 m/s, how long will it take light to move a distance of 1,000 km
astra-53 [7]

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1000km=1000000 M

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6 0
2 years ago
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