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2 years ago

A 2-kg bowling ball sits on top of a building that is 40 meters tall.

2 answers:

7 0

A 2-kg bowling ball sits on top of a building that is 40 meters tall possess gravitational potential energy. It is energy an object possesses because of its position in a gravitational field. We calculate as follows:

GPE = mgh = 2(9.8)(40) = 784 J

Dahasolnce [82]2 years ago

6 0

The bowling ball is at rest, so it only has gravitational potential energy.

Ug = mgy
Ug = (2)(9.8)(40) = 784 J

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How many total oxygen atoms are in the compound Molybdenum (V) Dichromate?

alekssr [168]

Answer:

$1.2646\times10^{25}\ atoms$

Explanation:

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-We apply Avogadro's constant to find the number of atoms of oxygen:

$Avogadro's \ Constant=6.022\times 10^{23} \ mol_1\\\\No\ of \ Atoms=Moles\times Avogadro's \ Constant\\\\=21\times 6.022\times 10^{23} \\\\=1.2646\times10^{25}\ atoms$

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2 years ago

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Maru [420]

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2 years ago

You connect a voltmeter to an unknown resistor in a circuit in order to measure the potential difference across that resistor. H

scZoUnD [109]

Answer:

option (a)

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2 years ago

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Tems11 [23]

Work is (force applied) x (distance through which the force moves).

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2 years ago

Which of the following statements does not correctly describe a harmonic plane wave traveling in some medium.

Nostrana [21]

Answer:

Incorrect statement is (b).

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Option (b) : Speed of a wave is given by the product of its frequency and wavelength. It is not necessary that doubling the wavelength of the wave will halve its frequency as speed depends on the medium.

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Option (d) : Since, $v=f\times \lambda$

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2 years ago