4 years ago

Which travels at the greatest speed?

1 answer:

6 0

Light through a vacuum. According to an official government sight, <em>nothing</em> travels faster than light through a vacuum.

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The total momentum of two marbles before a collision is 0.06 kg-m / s. no outside forces act on the marbles. what is the total m

SpyIntel [72]

Hi my friend, since momentum is always conserved without external forces, the momentum after the collosion will still be 0.06 kg*m/s. Hope it helps☺

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3 years ago

A ball is launched from the ground with a horizontal speed of 30 m/s and a vertical speed of 30 m/s. How far horizontally will i

IceJOKER [234]

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It will travel Vx * t = 30 m/s * 2 s = 60 m

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3 years ago

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A consistent tendency for forecasts to be greater or less than the actual values is calledâ€‹ ________ error.

stepladder [879]

The Answer is: Bias Error

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3 years ago

How can wasted energy be made useful?

murzikaleks [220]

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by using it in a such place or thing which needs it or which can work with it

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2 years ago

A right triangle has base b = 100 plusminus 1 ft and adjacent angle theta = 30 degree plusminus 0.5 degree. Calculate the height

aivan3 [116]

Answer:

The height h of this right triangle is 57.74±1.74ft.

Explanation:

Knowing that this is a right triangle, if one of the angles adjacent to the base, θ is 30º, the other angle is 90º. Therefore we can calculate the height h can be calculated with the tangent:

$tan(\theta)=\frac{h}{b}\leftrightarrow h=tan(\theta)b=tan(30^\circ)100ft=57.74ft$

For the uncertainty we use the partial derivatives:

$\Delta h=|\frac{dh}{db}|\Delta b+ |\frac{dh}{d\theta}|\Delta \theta\\\Delta h=|tan(\theta)|\Delta b+ |\frac{b}{cos^2(\theta)}|\Delta \theta$

We have to be careful to use Δθ in radians:

$\Delta h=|tan(30^\circ)|1ft+ |\frac{100ft}{cos^2(30^\circ)}|\frac{0.5^\circ2\pi}{360^\circ}=1.74ft$

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3 years ago