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Is Newton's statement a law or a theory?
While studying how objects change motion when they
run into each other, Isaac Newton discovered that the
force of an object's impact equals the object's mass
multiplied by its acceleration.
He could not explain why this is, but it was clearly true to
anyone else who conducted experiments, and it remains
just as true today.
O It is a theory because it developed and changed over
time as new technology provided new observations.
O It is a theory because it is a statement of fact that
does not need any more experimental support.
O It is a law because it developed and changed over
time as new technology provided new observations.
It is a law because it is a statement of fact that does
not need any more experimental support.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

a electronegativity decreases beacuse the size of nucleus is bigger.