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3 years ago

What was the vertical component of her acceleration during push-off? the positive direction is upward?

1 answer:

5 0

The answer of these two problems are : A) a = (F-W)/m = (100-500)/500/g = 9.8*500/500 = +9.8 m/sec^2 B) a1 = +9.8-g = 0

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What is magnetic declination?

sdas [7]

I believe its B , (the direction the north end of a compass needle points, corresponding to the direction of the Earth's magnetic field lines)

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3 years ago

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Sand is pouring out of a pipe and is forming a conical pile on the ground. The radius of the pile is increasing at a rate of 2 f

Anton [14]

Answer:

$a)\ V=3053.628059 \ ft^3$

$b)\ V'=1017.876\ ft^3/day$

Explanation:

Rate of Change

The volume of a cone of radius r and height h is given by

$\displaystyle V=\frac{\pi r^2h}{3}$

The height is said to be 1/2 of the radius, thus

$\displaystyle V=\frac{\pi r^2\cdot r}{2\cdot 3}$

$\displaystyle V=\frac{\pi r^3}{6}$

a) Knowing r=18 feet, the volume is

$\displaystyle V=\frac{\pi 18^3}{6}$

$V=3053.628059 \ ft^3$

b) The rate of change of the volume is computed by taking the derivative of both sides respect to the time

$\displaystyle V'=3\frac{\pi r^2}{6}r'$

$\displaystyle V'=\frac{\pi r^2}{2}r'$

Where r' is the given rate of change of the radius: 2 feet/day.

Now we compute

$\displaystyle V'=\frac{\pi 18^2}{2}\cdot 2=1017.876$

$\boxed{V'=1017.876\ ft^3/day}$

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3 years ago

Select all the correct answers.

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Force is transferred from the moving ball to the stationary ball.

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With the water trap being used, all the possible sources of error would be eliminated.

Phoenix [80]

Answer:

True

Explanation:

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3 years ago

What type of System interact with its environment

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Answer:

System management

Explanation:

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