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3 years ago

The sticky substances in cigarettes that coat the lining of the lungs are _____.

Physics

2 answers:

Svetach [21]3 years ago

5 0

Answer:

Tar

Explanation: Tar is a big ingredient in cigarettes and can cause the sticky substance

rosijanka [135]3 years ago

5 0

Answer:

Tar

Explanation:

tar is a sticky substance consisting of inorganic and organic compounds.

Tar is very toxic and can cause cancer when deposited on the lungs

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A ship maneuvers to within 2500 m of an island's 1800 m high mountain peak and fires a projectile at an enemy ship 610 m on the

Ne4ueva [31]

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

t=(0-(250sin75)^2)/-9.8
the distance one is (2500+610)- (250m/s*cos75)*t=Dh Dh=horizontal distance 

the max height one is d=0.5*9.8*t^2 
d= max height subtract 1800-d

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2 years ago

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A ball is thrown upwards at an unknown speed. in a time of

alexandr402 [8]

Answer:

a) Initial speed of the ball = 14.45 m/s

b) At height 6 m speed of ball = 9.55 m/s

c) Maximum height reached = 10.65 m

Explanation:

a) We have equation of motion $s=ut+\frac{1}{2} at^2$ , where s is the displacement, u is the initial velocity, t is the time taken and a is the acceleration.

s = 6 m, t = 0.5 seconds, a = acceleration due to gravity value = -9.8 $m/s^2$

Substituting

$6=u*0.5-\frac{1}{2} *9.8*0.5^2\\ \\ u=14.45m/s$

Initial speed of the ball = 14.45 m/s

b) We have equation of motion $v^2=u^2+2as$ , where v is the final velocity

s = 6 m, u = 14.45 m/s, a = -9.8 $m/s^2$

Substituting

$v^2=14.45^2-2*9.8*6\\ \\ v=9.55m/s$

So at height 6 m speed of ball = 9.55 m/s

c) We have equation of motion $v^2=u^2+2as$ , where v is the final velocity

u = 14.45 m/s, v =0 , a = -9.8 $m/s^2$

Substituting

$0^2=14.45^2-2*9.8*s\\ \\ s=10.65 m$

Maximum height reached = 10.65 m

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3 years ago

If you were given distance and period of time, what can you calculate?

antiseptic1488 [7]

If you were given distance & period of time, you would be able to calculate the speed.

Hope this helps!

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3 years ago

Can someone please help me with science.

kherson [118]

Answer:

Yes

Explanation:

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ki77a [65]

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