Theories are backed up with lots of data, evidence, and observations from many people over time.

Question 7 options:
True
False

Answer:

Paper and pulp are made from cellulosic fibers and other plant materials. Some synthetic materials may be used to impart special qualities to the finished product. Paper is made from wood fibers, but rags, flax, cotton linters, and bagasse are also used in some papers.

Answer:

Graph D

Explanation:

Answer:

b

Explanation:

Answer:

[tex]i_A[/tex] = 3 A

[tex]i_B[/tex] = 1.8 A

[tex]i_C[/tex] = 1.2 A

Explanation:

Combined resistance of the resisters B and C,

[tex]\frac{1}{R'}=\frac{1}{R_1}+\frac{1}{R_2}[/tex] [Since [tex]R_1[/tex] and [tex]R_2[/tex] are attached in parallel]

[tex]\frac{1}{R'}=\frac{1}{4}+\frac{1}{6}[/tex]

[tex]\frac{1}{R'}=\frac{10}{24}[/tex]

R' = 2.4 Ω

Since, R' and resistor A are in series therefore, total resistance of both the resistors = 2 + 2.4

= 4.4 Ω

Now the current flowing in the circuit 'i' = [tex]\frac{E}{R+r}[/tex]

Here, E = E.M.F. of the cell

R = Total resistance of all resistors attached

r = Resistance of the cell

'i' = [tex]\frac{9}{2.4+0.6}[/tex]

i = 3 A

Current flowing in resistor A = 2 A

And Current in combined resistance of B and C = 3 A

Current flow in the resistors B and C will be in the ratio of C : B,

[tex]\frac{i_C}{i_B}=\frac{B}{C}[/tex]

[tex]\frac{i_C}{i_B}=\frac{4}{6}[/tex]

[tex]\frac{i_C}{i_B}=\frac{2}{3}[/tex]

Therefore, [tex]i_C[/tex] = [tex]\frac{2}{(2+3)}\times 3[/tex] = 1.2 A

[tex]i_B=\frac{3}{(2+3)}\times 3[/tex] = 1.8 A

Answer:

9.6 m/s

Explanation:

Equation is v=d/t so plug 120m to d (distance) and 12.5 sec to t (time).

v=120/12.5

v=9.6 meters per second

Answer: I Believe Its A. :)

Відповідь:

30%

Пояснення:

Ефективність машини виражається за допомогою виразу:

Ефективність = Вихід / Робоча потужність × 100%

Результат роботи = 1,89 × 10 ^ 6 Джоулів

Вхідні дані = 1,5 × 4,2 × 10 ^ 6

Вхідні дані = 6,3 × 10 ^ 6

Підставимо у формулу:

Ефективність = (1,89 × 10 ^ 6) / (6,3 × 10 ^ 6) × 100%

Ефективність = 1,89 / 6,3 × 100

Ефективність = 189 / 6,3

Ефективність = 30%

Отже, ефективність двигуна трактора становить 30%

Answer:

need help search it up

Explanation:

hehe..

Answer:

d. According to the previous theorem:

(kh^2)/2-mgh-(m(2v)^2)/2=0,

126h^2-2.577h-8.236=0,

h=0.266 m.

Explanation:

The maximum compression of the spring should be 0.266 m.

Given that,

Based on the above information, the calculation is as follows:

[tex](kh^2)\div 2-mgh-(m(2v)^2)\div 2=0\\\\126h^2-2.577h-8.236=0,[/tex]

h=0.266 m

Learn more: brainly.com/question/16911495

Answer:

9996kg.m/s

Explanation:

∆p=mv. 1200kg*8.33m/s

The approximate momentum of this car is 9,996 Kgm/s.

Given the following data:

To determine the approximate momentum of this car;

Momentum refers to the product of the mass possessed by an object and its velocity.

Mathematically, momentum is giving by the formula;

[tex]Momentum = mass \times velocity[/tex]

Substituting into the formula, we have;

[tex]Momentum = 1200 \times 8.33[/tex]

Momentum = 9,996 Kgm/s.

Read more on momentum here: https://brainly.com/question/15517471

Answer:

The answer to this question is D

Explanation:

Also all the answers are..

1. B

2. D

3. B

4. D

5. B

Answer:

they both use power how much it has

Explanation:

i think

Answer:

1 horsepower is a unit of power equal to 746 watts 1 watt is a unit of power equal to 1 joule per second.

Explanation: Working on it for homework right now and using my textbook

Answer:

Since you are asking for magnitude only, 12.6 units is the resultant. If you were looking for the full answer, 12.6 units North would be your answer

Explanation:

There there are 2 forces acting in the north direction add them up 5.4+9.3

this equals 14.7 since there is also something acting in the opposite direction, subtract that from the  total of the previous two, 14.7-2.1,

and your final answer will be 12.6 units

Answer:

The graph line that doesn't change in amounts.

Explanation:

Meaning if its a straight line horizontally across it is in equilibrium. If you don't know what I mean, search up equilibrium graph, and it will show you what I am talking about.

Answer:

I don't really know much about the whole stars thing, but I've written a lot of paragraphs in science

Explanation:

Remember:

Include:

Explanation:

Scientists define these charges as “+1” and “−1.” In an uncharged, neutral atom, the number of electrons orbiting the nucleus is equal to the number of protons inside the nucleus. In these atoms, the positive and negative charges cancel each other out, leading to an atom with no net charge.

Answer:

See the answer below

Explanation:

The two correct options are:

1. The student traveled the fastest between 4 and 5 minutes

2. The average speed of the student is 4 meters per minute

Between 4 and 5 minutes, the approximate distance of 7 meters covered by the student is the longest of all the distances covered per minute. Since speed is a measure of distance covered relative to time, it means that the student traveled the fastest between these periods.

The average speed is calculated by dividing the total distance traveled by a body by the total time taken to cover the distance.

From the graph:

Total distance covered = 20

Total time taken = 5

Average speed = 20/5 = 4 meters per minute

All the remaining conclusions are incorrect or indeterminate going by the information on the graph.

Answer:

X - component = v2 = 0.650 m/s

Y - component = v2 = 0.447 m/s

Explanation:

Given that :

Conservation of momentum

m1u1 + m2u2 = m1v1 + m2v2

m = mass of pool ball ; u = initial velocity ; v = final velocity

Since the masses are identical

x - component

u1 + u2 = v1 + v2

u1 = 1.33 m/s

u2 = 0

Final speed of first ball = 0.814 m/s at an angle of 33.3° ;

v1 = 0.814*cos33.3 = 0.814 * 0.8358073 = 0.6803471 m/s

v2x = u1x + u2x - v1

v2x = 1.33 + 0 - 0.6803471

v2x = 0.6496529 m/s

v2x = 0.650 m/s

Y - component :

v1sinθ= 0.814*sin33.3 ; 0.814 * 0.5490228 = 0.4469045 m/s

v2y = 0.447 m/s

Answer:

the y component is -0.477

Explanation:

u1+u2=v1+v2

u1=1.33, u2=0, v1= 0.814sin(33.3)= 0.477, v2=?

so, 1.33+0=0.477+x =

-0.477

Answer:

Um okay? thank you for the points have a good say and be careful out there!

Explanation:

Answer:

hello

Explanation:

Answer:

LOL i did this in 5th grade. Here is the one i made then. (its very short)

"Space! Its outta this world.. the phases of the moos and the constellations!

space, space, space, space. Science! its made up of physics! gravity holds us down and nobody see it! science... science... science... science...

OMG that was the worst rap ever lol. it probably will not help but still.

Answer: Kinematics is the movement of things that aren't anomalies

Don't do type 2 unless you're cool with trigonometry

It gives us the notion that we can study stuff's motion

Newton made laws, not just a potion

'Cause gravity causes downward acceleration

Of course it's easier to use energy conservation

Impulse is force times time, but don't be fooled

Inelastic collisions don't conserve no Joules

Collisions and explosions have conservation of momentum

Rotational motion disturbs my duodenum

Apply force to some metal and you get a neat fork

Add theta to that force and end up with mad toque

[Chorus]:

Physics concepts make the world go 'round

But try to apply them and watch your grade go down

When you get the warm fuzzies man you feel fantastic

They call me Young Modulus 'cause my raps are elastic

Solid are just springs that can be compressed

Apply a perpendicular force, call it tensile stress

Shoutout to Yosef for giving me the name

He be doing mad problems like it's all a game

[Verse 2]:

I travel at high speeds, call it special relativity

I might not be as long, but girl, you know you're into me

Magnetism positively fills me with satisfaction

Add a negative and there will be a great attraction

Amp up your circuitry and you'll score a slam dunk

You'll be resisting those Ohms like a Buddhist monk

Row, row, row your boat

'Cause Rho equals density, which is needed to float

Sucking is a vacuum of pressure disparity

Add so many variables that you'll be begging me for clarity

Cut the supporting rope and loosen the tension

There are many topics that I have yet to mention

[Chorus]:

Physics concepts make the world go 'round

But try to apply them and watch your grade go down

When you get the warm fuzzies man you feel fantastic

They call me Young Modulus 'cause my raps are elastic

Solid are just springs that can be compressed

Apply a perpendicular force, call it tensile stress

Shoutout to all of you for listening to this song

We're almost done now, I won't keep you too long

[Bridge]:

Nothing can hold back my rhymes, they're so phonetic

No force nor friction: static or kinetic

They say the Bulk Modulus can hold the most pressure

But it can't live up to Young 'cause I fill you with pleasure

Now for a lesson in acoustics, the study of sound:

Put your hands in the air and scream real proud!

*Physics chant*

[Chorus]:

Physics concepts make the world go 'round

But try to apply them and watch your grade go down

When you get the warm fuzzies man you feel fantastic

They call me Young Modulus 'cause my raps are elastic

Solid are just springs that can be compressed

Apply a perpendicular force, call it tensile stress

Shoutout to Mr. Fisher for inspiring this rap

He's got mad teaching skills so I'll give him a clap

*Claps*

Answer:

Your answer is the following...

(b)"Many valence electrons are shared between the atoms"

Explanation:

Answer:

b

Explanation:

edge 2020

Answer:

36km

Explanation:

Answer:

Explanation:

The simultaneous expansion and contraction of the layers should nonstick even the most stubborn glassware!!

Because "velocity" means the speed and direction of the motion.

In circular motion, or motion on any curved path, the direction is constantly changing.  So even if the speed isn't changing, the velocity is.

Answer:

gravity

Explanation:

it pulls everything down and the futher it goes the faster it accelerates gaining lots of speed and gravity is the only force that pulls thangs down

Answer:

3.451L

Explanation:

you divide by 1,000

Answer:

310000

Explanation:

mass (m) = 6,200kg

speed (v) = 10m/s

kinetic energy = 1/2 × mass × speed 2

KE = 1/2 × m × v2

KE = 1/2 × 6200× (10)2

KE = 3,100 × 100

KE = 310,000 S