Balanced equations account for the conservation of mass.

Physics

2 answers:

marusya05 [52]3 years ago

7 0

Answer:

True

Explanation:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow

uranmaximum [27]3 years ago

6 0

Answer:

fff

Explanation:

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An object is transported to three different planets in our solar system. Which of the following is true about that object?

Alisiya [41]

-- The object's weight is different on each planet, while it is
apparently weightless during the trips in between.

-- On some if not all of the three planets, the object needs to be
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4 years ago

The rotor blades of a helicopter on the ground with its engine idling rotate at 48rpm. If it takes 12s for the pilot to increase

zhannawk [14.2K]

Answer:

α = 3.59 [rad/s^2]]

Explanation:

First we have to convert the values of the angular speeds of revolutions per minute to radians on second.

wf = final angular velocity = 460 [rpm]

wo= initial velocity = 48 [rpm]

t = time = 12 [s]

$460 [\frac{rev}{min}]* [\frac{2\pi rad}{1 rev} ]*[\frac{1min}{60seg} ] = 48.17[\frac{rad}{s} ]\\48 [\frac{rev}{min}]* [\frac{2\pi rad}{1 rev} ]*[\frac{1min}{60seg} ] = 5.02[\frac{rad}{s} ]$

now we can replace, in the following equation:

$w_{o}=w_{i} +\alpha *t\\where:\\\alpha = angular acceleration [rad/s^{2}]\\replacing:\\\alpha =\frac{w_{o} -w_{i} }{t} \\\alpha alpha =\frac{48.17-5.02 }{12} \\\alpha =3.59[\frac{rad}{s^{2} } ]$