if a tree falls in the woods and nobody is there to hear it, does it really make noise

Answer:

1. What is not considered a cardiovascular workout?

A. Jogging

B. Sit ups

C. Jump Ropes

D. Burpees

Explanation:

I am sorry, I am in middle school and I only have one question.

Answer:

10 m

Explanation:

200 g convert to kg = 0.2 kg

v = 50 m/s

F= ma

= 0.2(50)

= 10

Answ40x-50 =2334

Explanation:

idk

Answer:

B. You would weigh the same on both planets because their masses and the distance to their centers of gravity are the same.

Explanation:

Given that Planets A and B have the same size, mass.

Let the masses of the planets A and B are [tex]m_A[/tex] and [tex]m_B[/tex] respectively.

As masses are equal, so [tex]m_A=m_B\cdots(i)[/tex].

Similarly, let the radii of the planets A and B are [tex]r_A[/tex] and [tex]r_B[/tex] respectively.

As radii are equal, so [tex]r_A=r_B\cdots(ii)[/tex].

Let my mass is m.

As the weight of any object on the planet is equal to the gravitational force exerted by the planet on the object.

So, my weight on planet A, [tex]w_A= \frac {Gm_Am}{r_A^2}[/tex]

my weight of planet B, [tex]w_B=\frac {Gm_Bm}{r_B^2}[/tex]

By using equations (i) and (ii),

[tex]w_B=\frac {Gm_Am}{r_A^2}=w_A[/tex].

So, the weight on both planets is the same because their masses and the distance to their centers of gravity are the same.

Hence, option (B) is correct.

Answer:

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{20}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

XD

Explanation:

XD furry friend

Furry's muck eachother

Answer: Is that a question?

Explanation:

Answer:

Terrorists:scary,ruthless,morbid. Pretty:beautiful,sweet. Gay:happy,sweet,nice

Explanation:

Reeee

Answer:

786.2m/s²

Explanation:

Given parameters:

Force  = 114N

Mass  = 0.145kg

Unknown:

Acceleration of the baseball  = ?

Solution:

According to newton's second law of motion, the product of mass and acceleration is the net force on the body;

   Force  = mass x acceleration

Insert the parameters and find the acceleration;

    114  = 0.145 x acceleration

   Acceleration  = [tex]\frac{114}{0.145}[/tex] = 786.2m/s²

Answer:

Atoms

Explanation:

An atom is the smallest particle of an element that still has the properties of that element

Answer:

[tex] \huge{ \boxed{ \bold{ \sf{Atom}}}}[/tex]

✎ Let's explore about Atoms :

⟶ The smallest particle of an element which takes part in a chemical reaction without its division is called an atom. All the atoms of an element are the same. The atoms of different elements are different. All the atoms of iron in an iron nail are the same. But the atoms of iron are different from the atoms of copper. All the atoms of elements except hydrogen are made up of electron , proton and neutron. A hydrogen atom is made up of only electron and proton. Most of the atoms of elements do not exit independently except the atoms of inert gases like helium , neon , krypton etc.

____________

✑ EXTRA INFO :

STRUCTURE OF THE ATOM :

⟶ According to scientists , an atom is a sphere with a diameter of approximately [tex] \sf{ {10}^{ - 10}} [/tex] m. In the [tex] \sf{ {19}^{th} }[/tex] century , it was found that there are other smaller particles in an atom. These smaller particles are called subatomic or elementary or fundamental particles. The main subatomic particles are electrons , protons and neutrons. Among three subatomic particles of an atom , protons and neutrons are located at the centre of the atom called nucleus. The nucleus shows the positive charge due to the positive charge of protons. It also helps to find atomic weights . Electrons are revolving around the nucleus in their respective orbits or shells. The number of electrons present in an atom determines the size of the atom as it occupies more space as compared to the nucleus. In any atom , the number of negatively charged electrons in the orbits is equal to the number of positively charged protons in the nucleus. So, An atom is electrically neutral.

Hope I helped!

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Answer:

Explanation:

Scientific modelling is a scientific activity, the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate by referencing it to existing and usually commonly accepted knowledge.

Answer:

The system software is a collection of programs designed to operate, control, and extend the processing capabilities of the computer itself. System software serves, the interface between the hardware and the end users. Some examples of system software are Operating System, Compilers, Interpreter, Assemblers.

Explanation:

A computer software is a collection of computer programs that provides instructions for a computer on what to do and how to do it. There are two types of software:

1. System Software       2. Application software

1. System software controls the various operations performed by the computer hardware. It helps the user operate the computer system.

2. An application software is used to perform operations for a specific task.

Answer:

Option (B) is correct.

Explanation:

Given that the molecules of hydrogen gas ([tex]H_2[/tex]) react with molecules of oxygen gas ([tex]O_2[/tex]) in a sealed reaction chamber to produce water ([tex]H_2O[/tex]).

The governing equation for the reaction is

[tex]2H_2 +O_2 \rightarrow 2H_2O[/tex]

From the given, the only fact that can be observed that 2 moles of [tex]H_2[/tex] and 1 mole of [tex]O_2[/tex] reacts to produce 2 moles of [tex]H_2O[/tex].

As the mass of 1 mole of [tex]H_2 = 2[/tex] grams ... (i)

The mass of 1 mole of [tex]O_2 = 32[/tex] grams ...(ii)

The mass of 1 mole of [tex]H_2O = 18[/tex] grams (iii)

Now, the mass of the reactant = Mass of 2 moles of [tex]H_2[/tex] + mass 1 mole of  [tex]O_2[/tex]

[tex]= 2 \times 2 + 32[/tex]  [ using equations (i) and (ii)]

[tex]=4+32 = 36[/tex] grams.

Mass of the product = Mass of 2 moles of [tex]H_2O[/tex]

[tex]=2\times 18[/tex] [ using equations (iii)]

=36 grams

As the mass of reactants = mass of the product.

So, mass is conserved.

Hence, option (B) is correct.

Answer

4

Explanation:

four rays can also explain the ray diagram if the object is at infinity

Answer:

What are the opinions?

Explanation:

We need to see a question and opinion

Answer:

B. -38.2 m/s

Explanation:

Given parameters:

Time of fall  = 4s

Unknown:

Final velocity of the rock  = ?

Solution:

To solve this problem, we use the expression below;

       V = U + gt

V is the final velocity

U is the initial velocity

g is the acceleration due to gravity  = 9.8m/s²

t is the time taken

Now, insert the parameters and solve;

   V  = 0 + (9.8 x 4) = 39.2m/s

Answer:

acceleration

Explanation:

it is the time rate change in velocity

Answer:

acceleration

Explanation:

Physical changes are not represented by equations because it does not involve rearrangement of atoms.

Therefore, physical changes are not represented by equations because it does not involve rearrangement of atoms.

Learn more about physical change at: https://brainly.com/question/864557

Answer:

225 m//s

Explanation:

It ran 5m/s so 5x45=225

Answer:

225 meters

Explanation:

If it is running 5 meters per seconds, and it ran 45 seconds, you would need to multiple the seconds it ran by the speed per second: 5 • 45

5 • 45 = 225

Given :

The focal length of a concave mirror is 18 cm.

To Find :

The radius of curvature of the concave mirror.

Solution :

We know,

[tex]\text{Focal length}=\dfrac{\text{Radius of curvature}}{2}\\\\F=\dfrac{R}{2}\\\\R = 18\times 2\ cm\\\\R = 36 \ cm[/tex]

Therefore, the radius of curvature of concave mirror is 36 cm.

Hence, this is the required solution.

Answer:

a. arranging from least to higher pressure exerted by object B ,D A, C

b object B exert maximum pressure on surface because pressure is indirectly proportional to the surface area from the above figure we can easily conclude that object a have least surface area so, it exert more pressure on surface.

c.object C exert minimum pressure on surface because pressure is indirectly proportional to the surface area from the above figure we can easily conclude that object a have large  surface area so, it exert less pressure on surface.

Explanation:

Answer:

Alternating

Explanation:

It is alternating because it is easy to distribute long distance.

Direct current is found in batteries and have large voltage drop over distance.

Answer:

alternating

Explanation:

it was right on my quiz

Answer:

because metals a good conductor of electricity.

Explanation:

Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in metals can move through the metal, allowing metals to conduct electricity.

Explanation:

Metals are good conductors of electricity and are ducitile i.e. can be drawn into thin wires hence they are used for making wires.

Answer:

Static Friction

It is the friction that exists between a stationary object and the surface on which it's resting.

Sliding friction

It is the resistance created by two objects sliding against each other.

Rolling friction:-

It is the force resisting the motion when a body rolls on a surface.

Answer:

The answer is C- the atoms have different. A. Topic numbers

Explanation:

if they have the same neutrons and protons but not electrons the atomic numbers cant be the same if they dont have all 3 of the same numbers.

(on edge 2020-2021)

The atoms have different atomic numbers.

The atomic number of an atom is equal to the number of protons in its nucleus. Since Atom A and Atom B have the same number of protons and neutrons, they have the same atomic mass, which is the sum of protons and neutrons in the nucleus.

However, the number of electrons in an atom can vary. An atom is electrically neutral, which means it has the same number of protons and electrons. If Atom A and Atom B have different numbers of electrons, they will have different charges. One atom may have gained or lost electrons, making it either negatively charged (anion) or positively charged (cation), while the other remains neutral.

The chemical symbol of an element represents the identity of the element, and it is determined by the number of protons in the nucleus, which is the atomic number. Since the atoms have different atomic numbers, they will have different chemical symbols.

Therefore, the correct statement is that the atoms have different atomic numbers, as their atomic numbers determine their chemical identity.

To learn more about neutrons, here

https://brainly.com/question/31977312

#SPJ2

Answer:

they provide structure and support, facilitate growth through mitosis, allow passive and active transport, produce energy, create metabolic reactions and aid in reproduction.

Explanation:

they provide six main functions.

Answer:

Newton's third law, if i'm not mistaken.

Explanation:

Any action that occurs will have a opposite and equal action. The greater the force u apply to the wall, the greater the force the wall exerts back at you, hence why ur hands become red if u try pushing extremely hard on the wall.

Explanation:

p=5kw=5000w t=? p=w/t, t=w/p

w=25000j t=25000j/5000w

=5s

Answer: use the step down transformers to reduce these voltages in the power lines before they are supplied to the users.

Explanation:

Answer:

It passes through a step-down transformer.

Explanation:

Electric current in power lines must be stepped down before they enter our homes because they carry a very high voltage.

The voltage can destroy appliances that have very low voltage.

Answer:

The work done is 0.

Explanation:

The reason no work is done is because the equation W = Fs.

W = work

F= force

s= displacement

In this scenario F = 50 and s= 0

Therefore.

W = 50(0)

W = 0