Look at the simple machine shown below and determine the mechanical advantage.

A. 1.4
B. 0.2
C. 3.0
D. 4.9

Answer:

D. 24 m

Explanation:

Running up - velocity     + 30 m/min

Escalator 's moving down  velocity   - 24 m/min

Sum velocity (30 - 24) = 6 m/min

6 m/min * 4 min = 24 m

Answer:

ggggg72873832737

Explanation:

Answer:

A compound

Explanation:

Compounds are made of two or more atoms of different elements, such as water (H2O) and methane (CH4). Atoms are not drawn to scale. Molecules of compounds have atoms of two or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom.

Answer:

C.Electrical energy to heat and kinetic energy

Answer:

The radius of orbit will increase by 4, the satellite will move away from the Earth

Explanation:

The orbital speed of any body revolving in an orbit around another boyd is given by:

v (orbital) = √(G · M(central body)/R)

Where G is the gravitation constant.

If the body, e.g satellite is moving around the Earth, then the mass of central body M will also be a constant. Therefore, the only thing on which the orbital velocity will depend on will be Radius of the orbit R.

v ∝ 1/√R

√R ∝ 1/v

Take square:

R ∝ 1/v²

If the velocity of satellite is reduce to half, then:

R' ∝ 1/ (v/2)²

R' ∝ 1/(v²/4)

R' ∝ (4)(1/v²)

R' ∝ (4)(R)

The radius of orbit will increase by 4, the satellite will move away from the Earth

Answer:

D. 14 AWG

Explanation:

Ampacity is defined as the maximum current carry by a conductor without increasing the temperature rating.

All branch circuit conductors shall have an ampacity of at least 14 AWG.

That is why 14 AWG electric wire is a stranded copper wire widely used in circuits.

Hence, the correct option is D. 14 AWG.

The flat delta as shown in option C shows a situation of a constant velocity.

A velocity time graph is a graph that shows the velocity of an object plotted against the time. The slope of this graph is regarded  as the acceleration.

Looking at the graphs as shown, we can notice that option C is a delta. This delta is the option that implies that velocity is not changing with time (constant velocity).

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Answer: The pattern of colors that repeat in a thin soap film is a result of the interference of light waves reflecting off the front and back surfaces of the film. The specific colors seen are determined by the thickness of the film, with different wavelengths of light being reflected or refracted at different angles, creating the characteristic rainbow pattern.

Answer:

It increases the time it takes for the person to stop.

Explanation:

Answer:

It increases the time it takes for the person to stop.

Explanation:

Answer:

Dimples help the golf ball convert spin into lift.

But it was quite an accident that this effect was discovered.

Explanation:

Please i need a Brainliest.

Answer: It depends on the material and its purpose.

Explanation:

at a surface level question, I would assume for the most part, less area available for friction.

Answer:

Explanation:

Formula for calculating radius is

r=.529A x n^2 where A=10^-10m

So put n=1,2,3,4............

That statement is false. It's exactly the opposite direction.

In circular motion, the "centripetal" force ... and therefore the centripetal acceleration ... points TOWARD the center.

Answer:

False

Explanation:

Took The Quiz

The correct answer is B) Giving Congress the power to create courts

Explanation:

One of the principles the Constitution mentions in the preamble is Justice, this is mentioned in "We the people of the United States, in order to form a more perfect union, establish justice..." According to this, a priority is to make the country have justice, which is possible through courts, laws, among others. In this context, the action that would be allowed is "Giving Congress the power to create courts" because this might ensure the justice principle is applied in the U.S.

Answer:

D greater possibility of contamination of our food

Explanation:

Slaughterhouses are the places where animals are slaughter to supply food and when these places are consolidated, the few ones that remain receive a higher amount of animals and the meat from those animals can be combined in a batch which increases the chance of it to get contaminated. According to that, the answer is that the negative outcome of consolidation from many slaughterhouses across the US to only 13 is greater possibility of contamination of our food.

The other options are not right because they would be considered positive outcomes.

Answer:

The radius of orbit will decrease by 1/4, the satellite will come closer to Earth

Explanation:

The orbital speed of any body revolving in an orbit around another boyd is given by:

v (orbital) = √(G · M(central body)/R)

Where G is the gravitation constant.

If the body, e.g satellite is moving around the Earth, then the mass of central body M will also be a constant. Therefore, the only thing on which the orbital velocity will depend on will be Radius of the orbit R.

v ∝ 1/√R

√R ∝ 1/v

Take square:

R ∝ 1/v²

If the velocity of satellite will doubles, then:

R' ∝ 1/ (2v)²

R' ∝ 1/4v²

R' ∝ (1/4)(1/v²)

R' ∝ (1/4)(R)

The radius of orbit will decrease by 1/4, the satellite will come closer to Earth

Answer:

B

Explanation:

If  the pilot, who has a mass of 80 kg, decides to eject from the airplane. With the reduced total mass,then the new approximate acceleration of the airplane will be 5.2 m/s²

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.

The mathematical expression for Newton's second law is as follows

F = m*a

where F represents the force applied

m is the mass of the object

a is the acceleration of the object

The initial acceleration of an airplane with a total mass of 850 kg has an engine malfunction, causing it to provide a constant horizontal force of 4000 N.

F =m*a

4000 N = 850×a

a= 4.7 m/s²

An acceleration of airplane when the pilot, who has a mass of 80 kg, decides to eject from the airplane. With the reduced total mass,

the horizontal force is the same 4000 N, now the total reduced mass the airplane is 770 kg

F =m*a

4000 =770×a

a = 5.2 m/s²

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Answer: kindly see Explanation

Explanation:

Atoms bond in other to achieve a stable valence electron shell. Through bonding, atoms with incomplete valency in the outer shell may accept, lose or share electrons with another atom in other to achieve a stable outer shell or configuration.

Ionic bonding:

Ionic or electrovalent bonding simply occurs when atoms accept or lose electrons in their outer shell in other to achieve stability. Elements that require 1 atom to achieve stability accepts from elements which requires losing 1 atom in other to achieve a stable outer shell.

Example is Sodium chloride (NaCl) sodium loses one atom, which chlorine accepts and both achieve a stable outer shell.

Covalent bonding simply refers to electron sharing between atoms. Instead of losing or accepting, the atoms bond by sharing electron to achieve stability. Such is the bonding between Hydrogen and Oxygen in the formation of H2O, oxygen requires two electrons to attain stability, each hydrogen atom requires one each to attain stability, through sharing oxygen attains two more electrons, one each from the hygrogen atoms and the oxygen atom also shares one electron with each hydrogen atom. Then all the atoms atoms stability.

Answer:

1.) Atoms bond in order to gain more stability.

2.) They can complete their valence by sharing (taking and giving) electrons for 1.)

Explanation:

Hope This Helps

Answer:

16 ohms

Explanation:

V= I ⋅ R

where,  V  is the net potential difference in the circuit,  I  is the current in the circuit and  R  is the net resistance of the circuit.  

In this case,  V = 240  volts,  I = 15  amperes.

240 = 15 ⋅ R  

⇒ R = 240/ 15 = 16  ohms

Answer:

b-16ohms

Explanation:

If you are using online learning/PLATO the answer is proven to be B-16 ohms

Answer:

D 9.8 m/s^2

Explanation:

The force of gravitational gravity on earth is 9.8 m/s^2

Answer:

answer in photo:

Explanation:

Elements:

Compounds:

A chemical element can be defined as a pure substance that is represented by a symbol and it comprises one type of atom that has the same atomic number (number of protons) in its nuclei.

Basically, a chemical element is a pure substance that can't be broken down, decomposed or transformed into simpler substances by chemical or physical means.

In Chemistry, some examples of a chemical element include the following:

A chemical compound can be defined as a substance that is represented by a formula and it contains two or more types of atoms, which can be chemically broken down.

Some examples of a chemical compound are:

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Answer:

A) 9.8m/s this answer is correct.

The acceleration is increasing by 0.9m/s^2 .

so, in each second it will increase by 0.9m/s^2.

Therefore, in 2 second

0.9 * 2

= 1.8m/s

Now,

8 + 1.8

= 9.8m/s

Given that,

Mass of each washer  = 4.9 g

We need to calculate the mass of two washers in kg

Using conversion of unit

Mass of each washer [tex]m= 4.9\times10^{-3}\ Kg[/tex]

So, Mass of two washers is

[tex]M=2\times m[/tex]

Put the value of m

[tex]M=2\times4.9\times10^{-3}\ k[/tex]

[tex]M=0.0098\ Kg[/tex]

If 4 washer are attached to the spring

We need to calculate the applied force on the car

Using formula of force

[tex]F=mg[/tex]

Put the value into the formula

[tex]F=4\times4.9\times10^{-3}\times9.8[/tex]

[tex]F=0.192\ N[/tex]

Hence, (i), The mass of two washers is 0.0098 kg.

(ii). The applied force on the car is 0.192 N.

Answer:

i just did it

Explanation:

Answer: force = mass x accelegation

Explanation: 15x3 = 45 N

Answer:

A

Explanation:

Answer:

the air within our bodies (in our lungs and stomachs, for example) is exerting the same pressure outwards so there's no pressure difference and no need for us to exert any effort.

Explanation:

Because in our body blood also exerts pressure that's why we don't feel atmospheric pressure.

Answer:

10 mL= 0.01 L

Explanation:

V(water) = 20 mL

V(water + a marble) = 30 mL

V(marble) = V(water + a marble) - V(water) = 30 mL - 20 mL = 10 mL= 0.01 L

I think the answer is Resistance.  If the link i posted int he comment is right.

Answer:

A.4m/s

Explanation:

(4m/s-2m/s)÷0.5s

=2m/s÷0.5s

=4m/s

Answer:

1. Possibility of all life being wiped out

2. Ecosystem being imbalanced.

3. Loss of one species triggers the lost of others as the food chain will collapse.

Answer:

a

Explanation: