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3 years ago

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Choose the scientific notation that best represents the standard notation given. 6,840,000,000 m 68.4 x 108 m 6.84 x 108 m 6.84

x 10-9 m 6.84 x 109 m

2 answers:

faust18 [17]3 years ago

8 0

ANSWER

$6.84\times 10^9$

EXPLANATION.

To write in scientific notation means , we write in form,

$k\times 10^n$

Where n is an integer and

$1\le k\:$

The given number is,

$6,840,000,000$

We move the decimal point backward to obtain our k, the n here is 9, because we moved backward 9 times.

This implies that,

$6,840,000,000=6.84\times 10^9$

The correct answer is D

PIT_PIT [208]3 years ago

4 0

Answer:

first question its D 6.84 x 10^9 m Second is B 1.43 x 10^-10 g

Explanation:

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Answer:

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3 years ago

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

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Answer:

a) $v=0.999124c$

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Explanation:

From the question we are told that

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Generally the equation of speed of rocket v mathematically given by

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where

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Therefore

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b)

Generally the equation of the energy E required to attain prior speed mathematically given by

$E=\frac{1}{\sqrt{1-(v/c)^2} }-1(20000kg)(3*10^8m/s)^2$

$E=7.566*10^{22}$

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3 years ago

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KonstantinChe [14]

Answer:

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Explanation:

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$\Delta T$ = Change in temperature

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$Q_1=mL_s\\\Rightarrow Q_1=m(2.256\times 10^6)$

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$Q_2=ms_w\Delta T\\\Rightarrow Q_2=m4186\times (100-0)\\\Rightarrow Q_2=m0.4186\times 10^6$

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$Q_3=mL_i\\\Rightarrow Q_3=m(333.5\times 10^3)\\\Rightarrow Q_3=m(0.3335\times 10^6)$

Total heat released is

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6 0

4 years ago