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2 years ago

Newton’s Third Law:

1 answer:

5 0

If one force acting in one direction is greater than the force acting in the opposite direction, the object will <u>move.</u>

<h3>What is Newton's third law of motion?</h3>

Newton's third law of motion state that every action has an equal and opposite reaction. It is an action-reaction principle. It stated that the force always exists in a pair.

Hence,if one force acting in one direction is greater than the force acting in the opposite direction, the object will <u>move.</u>

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suppose a car manufacturer tested its cars for front end collsion by hauling them up on a crane and dropping them from a certain

IRINA_888 [86]

Initial height: 66.5 m

Explanation:

The problem can be solved by using the principle of conservation of energy.

If we neglect air resistance, the total mechanical energy of the car is conserved during the fall, therefore we can write:

$K_i + U_i = K_f + U_f$

where :

$K_i = 0$ is the kinetic energy of the car at the top (it starts from rest)

$U_i = mgh$ is the gravitational potential energy of the car at the top, with:

m = the mass of the car

g = the acceleration of gravity

h = the heigth of the car

$K_f = \frac{1}{2}mv^2$ is the kinetic energy of the car just before hitting the ground, with

v = 130 km/h final speed of the car

$U_f = 0$ is the gravitational potential energy of the car at the bottom

Re-arranging the equation, we find

$mgh=\frac{1}{2}mv^2$

and we have:

$g=9.8 m/s^2\\v = 130 km/h = 36.1 m/s$

Solving for h, we find the initial height of the car:

$h=\frac{v^2}{2g}=\frac{36.1^2}{2(9.8)}=66.5 m$

Learn more about kinetic energy and potential energy:

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3 years ago

Which of these experiments tests a chemical property of an object??

Ilia_Sergeevich [38]

<span>B. shining a bright light on the objects and testing for decomposition </span> <span>

In explanation, chemical property is a characteristic of a certain substance came from an outcome due to chemical change or reaction. In the situation above, more specifically toxicity is involved in the chemical property/change. Hence, when the object is tested for decomposition. Like for an example of decomposition simply in metals, rusting. Rusting a process of degeneration of metals. Here it works the same. Toxicity is how much damage did a certain entity do to the object. </span>

8 0

3 years ago

Read 2 more answers

Help<br><br><br> What are energy and work

mylen [45]

Answer:

<em>In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.</em>

<em />

Explanation:

<h2><u><em>HOPE THIS HELPS</em></u></h2>

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3 years ago

Sneed with direction is called

Natali [406]

Answer:

abhudbhfbhbyfghsvcbnxzbncmbhdbekhvbfvsvbd bhjcayhvj

Explanation:

fevwygafjdbhsaukchavbgaekh

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3 years ago

A type of energy embodied in oscillating electric and magnetic fields is called

yaroslaw [1]

Answer: Electromagnetic radiation

Explanation:

Electromagnetic radiation is a combination of oscillating electric and magnetic fields, which propagate through space carrying energy from one place to another.

To understand it better:

This radiation is spread thanks to the electromagnetic fields produced by moving electric charges and their sources can be natural or man-made.

It should be noted that the energy of electromagnetic radiation can vary and depending on its frequency it can be useful for various situations.

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3 years ago