All categories

3 years ago

Why do physicists use models?

Physics

2 answers:

svetoff [14.1K]3 years ago

6 0

To see if the project is actually going to work. Also called prototypes

astra-53 [7]3 years ago

3 0

Answer:

Sometimes the phenomena are too complex to be actually explained in totality. In these cases, in order to explain the phenomena, the scientist needs to "simplify" the phenomena.

They can do it by idealizing some things, supposing that some things do not change, and things like that. This is called a "model" of the phenomena. This model helps to explain and work (to a certain extent) with this phenomena, because makes it a lot simpler to work with (experimental wise and mathematical wise)

You might be interested in

an object near the earth's surface is in a state of free-fall. The object is experiencing a downward force of 194 n. What is the

Paraphin [41]

When an object is under free fall then it means the net force on the object is only due to gravitational attraction force

So here we have

$F_{net} = mg$

so in order to find mass we can use

$m = \frac{F_{net}}{g}$

here given that net force on the object is

F = 194 N

$m = \frac{194}{9.8}$

$m = 19.8 kg$

<em>so the mass of the object must be 19.8 kg</em>

7 0

3 years ago

55 points question<br> please put the answer in order by up to down<br> please help me

wlad13 [49]

Answer:

animal and plant

Explanation:

1st is animal

mitochondria

cell membrane

nucleus

endoplasmic reticulum

golgi body

plant cell

cell wall

cell membrane

chloroplast

nucleus

vacuole

endoplasmic reticulum

mitochondria

golgi body

4 0

3 years ago

A single point on a distance time graph tells the ____ speed

neonofarm [45]

Answer: Instantaneous speed.

Explanation:

3 0

3 years ago

Read 2 more answers

A girl is sitting in a sled sliding horizontally along some snow (there is friction present).

Over [174]

Answer:

159 N

Explanation:

The force of friction, Fr is a product of coefficient of feiction and the normal force. Therefore, Fr=uN where N is the normal force and u is coefficient of friction. Here, we have two coefficients of friction but since it is sliding, then we use coefficient of kinetic energy. Substituting 0.25 for u and 636 N for N then

Fr=0.25*636=159 N

Therefore, the force of friction is equivalent to 159 N

4 0

3 years ago

Match: Substance ....... Definition Lewis base A. Provides H in water Bronsted-Lowry base B. Provides OH - in water Arrhenius ac

algol13

Answer:

A. Provides H in water - Arrhenius acid

B. Provides OH - in water - Arrhenius base

C. Proton donor - Bronsted-Lowry acid

D. Proton acceptor - Bronsted-Lowry base

E. Electron pair donor - Lewis base

F. Electron pair acceptor - Lewis acid.

Explanation:

Definition:

A Lewis base is any substance, such as the OH- ion, that can donate a pair of nonbonding electrons. A Lewis base is therefore an electron-pair donor.

A Bronsted-Lowry acid is a chemical species that donates one or more hydrogen ions in a reaction. Also, a Bronsted-Lowry base accepts hydrogen ions.

An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons. In other words, it increases the number of H+ ions in the water. Also, an Arrhenius base dissociates in water to form hydroxide ions, OH-.

4 0

4 years ago