When an object moves, stops moving, changes speed, or changes direction, how do scientists describe that condition?

Physics

2 answers:

FromTheMoon [43]3 years ago

8 0

Those are all "acceleration", caused by
unbalanced forces acting on the object.

dalvyx [7]3 years ago

8 0

The correct answer to this question is D) Unbalanced forces.

EXPLANATION:

From Newton's first laws of motion, we know that everybody continues to be at state of rest or of uniform motion in a straight line unless and until, it is compelled by some external unbalanced forces acting on it.

Hence, it is the unbalanced force which is responsible for creating the motion in a body, changing the direction of motion or speed of the body.

No balanced force can change the state of the body. The body will be either in dynamic equilibrium or in static equilibrium due to the balanced forces.

Hence, the correct option of this question is unbalanced forces.

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Suppose you read in the newspaper that a new planet has been found. Its average speed in its orbit is 33 kilometers per second (

Harlamova29_29 [7]

Answer:

E. Kepler's second law says the planet must move fastest when it is closest, not when it is farthest away.

Explanation:

We can answer this question by using Kepler's second law of planetary motion, which states that:

"A line connecting the center of the Sun with the center of each planet sweeps out equal areas in equal intervals of time"

This means that when a planet is further away from the Sun, it will move slower (because the line is longer, so it must move slower), while when the planet is closer to the Sun, it will move faster (because the line is shorter, so it must move faster).

In the text of this problem, it is written that the planet moves at 31 km/s when is close to the star and 35 km/s when it is farthest: this is in disagreement with what we said above, therefore the correct option is

E. Kepler's second law says the planet must move fastest when it is closest, not when it is farthest away.

5 0

3 years ago

What is the connection between electrons and protons

TEA [102]

Answer:

Electrons and protons are connected with one another in term of charge and size.

Explanation:

The size of electron and proton is always same in any atom but they possess opposite charge.
Electron in any atom carries negative charge where as proton carries the positive charge.
In any neutral atom the charge between electron and proton is balanced along with the size.
The nucleus of any atom bounds only proton and neutron but the electron is present revolving around the nucleus.