3 years ago

Nonmetals in the periodic table have a negative oxidation number. Which statement best explains why?

1 answer:

7 0

They have a negative oxidation number because nonmetals gain electrons, thus making them negatively charged ions (anions). Metals become cations and have a positive charge because they lose electrons.

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Jumping up is work against gravity why

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Answer:

gravitational force attract us towards the ground

Explanation:

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3 years ago

A cat lies on the floor. can you say that no force acts on the cat? or is it correct to say that no net force acts on the cat? e

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Odd though it seems at first, gravity is pulling the cat down while the floor is pushing the cat up - in equal amounts. Forces are absolutely acting on the cat but they balance - so there is no net force.

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3 years ago

An automobile to be transported by ship is raised 8.2m above the dock. If it's GPE is 63,405 J what is the car's mass?

Pepsi [2]

Answer:

m = 788.2[kg]

Explanation:

The potential energy of a body is defined as the product of mass by gravitational acceleration by height. And it can be calculated by means of the following equation.

$E_{pot}=m*g*h$