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3 years ago

What is the best summary for this cartoon?

Physics

2 answers:

Paha777 [63]3 years ago

6 0

Answer:

C: World War I resulted from a chain reaction involving many nations.

Explanation:

Just did the questions and got it right

docker41 [41]3 years ago

3 0

Answer:

Explanation:

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Which of the following statements is true?

Vikki [24]

Answer:

The answer is B.

Explanation:

They are in control of the experiment, they can change it the variables to better help the experiment.

5 0

3 years ago

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After three times the particle half-life of radioactive particle, 1/4 of the particle will remain un-decayed. O True O False

Roman55 [17]

Answer:

False

Explanation:

Let the initial amount is No.

Let t be the half life.

Half life is the time in which the initial amount of the substance becomes half and the remaining amount in teh sample is also half.

After one half life, the remaining amount is No / 2

After two half lives, the remaining amount is No / 4

After three half lives, the remaining amount is No / 8.

So, the statement is false.

6 0

4 years ago

In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested travelin

Vika [28.1K]

Answer:

Explanation:

Let the required velocity of rocket be v .

We shall use the formula of time dilation to find the velocity of rocket .

t = $\frac{t'}{\sqrt{1-\frac{v^2}{c^2} } }$

t = 430

t' = 38

$430=\frac{38}{\sqrt{1-\frac{v^2}{c^2} } }$

$\sqrt{1-\frac{v^2}{c^2} } }=\frac{38}{430}$

$1-\frac{v^2}{c^2}$ = .0078

$\frac{v^2}{c^2}$ =.9922

$\frac{v}{c}$ = .996

v = .996 x 3 x 10⁸ m /s

= 2.988 x 10⁸ m /s

B )

Kinetic energy of rocket

= 1/2 m v²

= .5 x 20000 x (2.988 x 10⁸ )²

= 8.9 x 10²⁰ J .

C )

This energy is 8.9 times the energy requirement of United states in the year 2005 .

7 0

4 years ago

A person on a road trip drives a car at different constant speeds over several legs of the trip. She drives for 10.0 min at 50.0

irakobra [83]

<h2>The average speed for the entire trip is 47.5 m/s .</h2>

It is given that for different time span car have different speed and also the person spend $40\ min=\dfrac{40}{60}\ hrs =0.67\ hrs\ .$ in eating lunch and buying gas.

We know , average speed is total distance covered by total time taken .

Therefore , average speed , $v=\dfrac{total\ distance }{total\ times}$

$v=\dfrac{\dfrac{10}{60}\times 50+\dfrac{19}{60}\times 100+\dfrac{60}{60}\times 55}{\dfrac{10}{60}+\dfrac{10}{60}+\dfrac{60}{60}+ \dfrac{40}{60}}\\\\\\v=47.5\ m/s$

Hence, this is the required solution.

Learn More :

Average speed

https://brainly.in/question/12701198

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3 years ago

NEEED HELP!!!! A hurricane warning has been issued in a location in Florida. What would people in the location most likely do?

siniylev [52]

Head to states farther inland.

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3 years ago

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