3 years ago

How is the number 15,000 written in scientific notation?

Physics

1 answer:

morpeh [17]3 years ago

6 0

Answer:

Correct answer: D. 1.5 · 10⁴

Explanation:

Extremely large or extremely small numbers are written in the form

r · 10ⁿ

where r is a one-digit number in decimal notation and has values from 1 to 9

and n has values ±1, ±2, ±3 .........

God is with you!!!

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An object is traveling on a circle with a radius of 6 feet. If in 80 seconds a central angle of 9/4 radians is swept out, then f

trapecia [35]

Answer:

The angular speed of the object is 0.0281 rad/s

The linear speed of the object is 0.169 ft/s

Explanation:

Given;

radius of the circle, r = 6 ft

time of motion of the object around the circle, t = 80 s

central angle formed by the object during the motion, θ = 9/4 rad = 2.25 rad

The angular speed of the object is calculated as;

$\omega = \frac{\theta }{t} = \frac{2.25 \ rad}{80 \ s} = 0.0281 \ rad/s$

The linear speed of the object is calculated as;

v = ωr

v = 0.0281 rad/s x 6ft

v = 0.169 ft/s

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3 years ago

If the mass of a 1.8 g paperclip was able to be completely converted to energy, how much energy would you obtain?

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Answer:

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Explanation:

Given that,

The mass of the paperclip, m = 1.8 g = 0.0018 kg

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$E=mc^2$

Where

c is the speed of light

So,

$E=0.0018\times (3\times 10^8)^2\\\\E=1.62\times 10^{14}\ J$

So, the energy obtained is $1.62\times 10^{14}\ J$ .

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Twenty is the _________________ of potassium

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