A person weighing 645 N climbs up a ladder to a height of 4.55 m what is the increase in gravitational energy

Answer:

B: Solids

Explanation:

I have notes from EDG and I looked it up on the internet

I hope this helps

In the solids, convection can not occur. Convection can only be done in the fluids.

Under the effect of gravity, hotter, less dense material rises while colder, denser stuff sinks, resulting in heat transfer"Convection is the ultimate mode of energy transmission to the surface"

There are three modes of the heat transfer;

1. Conduction

2. Convection

3. Radiation

Convection occurs in the fluid which is liquid and gases. Convection never occurs in the solid.

Hence option B is correct.

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Answer:

Elastic collision

Explanation:

An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions. Supposed two similar trolleys are traveling toward each other with equal speed.

Answer: Newton’s Third Law of Motion

Explanation:

USATestPrep❤️

Answer:

Examples. Weight, height, and length of organisms are examples of continuous variation while the color of petals, blood groups of animals, the gender of animals, etc. are examples of discontinuous variation.

Explanation:

Hope it helps

Answer:

temperiture or annual wind speed.

Explanation:

Answer:

f=1/t is the equation of frqency

Answer: Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant

Explanation:

Answer:

The answer would be 5.6 kg of a mass.

Explanation:

p= mv

m= p/ v

The explanation of that is:

momentum = mass× velocity

mass= momentum / velocity

Hope this helped!

Answer:

Living things are highly organized and structured, following a hierarchy that can  A molecule is a chemical structure consisting of at least two atoms held In larger organisms, cells combine to make tissues, which are groups of  An organ system is a higher level of organization that consists of functionally related organs.

Explanation:

Living things are highly organized and structured, following a hierarchy that. A molecule is a chemical structure consisting of at least two atoms held In larger organisms.

Cells combine to make tissues, which are groups of  An organ system is a higher level of organization that consists of functionally related organs.

The fact that all living things are composed of cells—which are regarded as the foundation of life—is what first distinguishes them from other types of organisms. The remarkable thing about cells is that, despite their small size, they can join together to build extremely vast structures.

Multicellular organisms are extraordinarily sophisticated creatures with amazing cellular organization. This organization starts deep within your DNA and reaches all the way up to you as an individual.

Therefore, Living things are highly organized and structured, following a hierarchy that. A molecule is a chemical structure consisting of at least two atoms held In larger organisms.

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Answer:

0.255m

Explanation:

The total mechanical energy of the ball is given 25 J. The potential energy of the ball is 8 J. Then, the height of the ball above the ground is 0.25 m.

Kinetic energy of an object is the energy generated by virtue of its motion whereas potential energy is generated by virtue of its position at a height from the ground.

The sum of kinetic and potential energy of the object is called its mechanical energy.

given Ke of the ball = 17 J

mechanical energy = 25 J

then potential energy = 25 J - 17 J = 8 J.

We have the relation between potential energy, mass and height h as :

p = mgh .

given the mass m = 3.2 kg

g = 9.8 m/s²

then, h = p / (mg)

h = 8 J / (3.2 kg× 9.8 m/s² )

  = 0.25 m.

Therefore, the height of the ball above the ground is 0.25 m.

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Answer:

1. A copper piece cannot be changed into magnets, because -

• Only the ferromagnetic metals (the metals which have magnetic properties) can be changed into electromagnets or permanent magnets.

• But,copper is not a ferromagnetic metal and that's why we cannot change the copper into any kind of magnets

Explanation:

Answer:

Your education back ground

Answer:

I would wanna meet juice if he was still alive ofc

Explanation:

With the use of wave speed formula, below are the answers to the questions

1. C

2. C

3. D

4. B

All the question centered on wave speed, wavelength and wave frequency. The relationship between these three quantities is;

wave speed = wavelength x frequency

That is,

V = Fλ

1. The given parameters are;

V = 1,500 m/s

F = 5 Hz

wavelength λ = V/F = 1500/5 = 300 m

2.) Given that the wavelengths ranging from 2.75 to 16.5 meters and the speed of sound is approximately 330 m/s

When wavelength = 2.75 m

F = V/ λ = 330 / 2.75 = 120 Hz

When wavelength = 16.5 m

F = V/ λ = 330 / 16.5 = 20 Hz

Therefore, the frequencies of thunder humans hear ranges from 20 Hz to 120 Hz

3.) Since the two waves are similar, they will be travelling at the same speed. That is,

Wave speed of X = Wave speed of Y

For wave X and Y respectively;

F = 200 Hz and 700 Hz

λ = 35 m and λm

Find λ of Y by equating the two wave speed. That is,

Fλ for X = Fλ for Y

200 x 35 = 700 λ

λ = (200 x 35)/ 700

λ = 7000 / 700

λ = 10 m

Therefore, The wavelength for wave Y is 10 m

4.) Given that the sea lions  frequencies are ranging from 500 to 4,000 hertz. And the speed of sound in sea water is approximately 1,500 m/s

By using the same formula,

V = Fλ

Make wavelength the subject of formula

λ = V / F

When F = 500 Hz

λ  = 1500/500 = 3 m

When F = 4000 Hz

λ =  1500/4000 = 0.375 m

Therefore,  the approximate wavelengths of sound with which the California sea lions communicate is of the range 0.375 m to 3 m

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Answer:

1120

Explanation:

power =force ×velocity

=700*1.6=1120

Answer: I = 9.0 A

Explanation: Ohm's Law is defined as the relationship between voltage and current: in a circuit, the voltage accross a conductor is directly proportional to the current.

The constant of proportionality is Resistance, whose unit is ohm (Ω).

so, Ohm's Law is

V = R.I

It is asked for the current, so, rearraging:

[tex]I=\frac{V}{R}[/tex]

When added two more batteries, the voltage of the circuit triples:

[tex]V_{final}=3V_{initial}[/tex]

Since they are directly proportional, if voltage triples, so does current:

[tex]I_{final}=3I_{initial}[/tex]

[tex]I_{final}=3(3.0)[/tex]

[tex]I_{final}=[/tex] 9.0

The new current, when driven by 3 batteries is 9.0 A.

Answer:

.1 seconds per meter

Explanation:

I am going to assume they are asking for the average time per 1 meter.

Because it took 10.23 seconds to run 100 meters, we are going to divide 10.23 by 100. This number will be the time per 1 meter.

To divide by 100, we will move the decimal point over by two. That will give us .1023 seconds.

The question asks to round to the nearest tenth, so we round it to .1 seconds.

*Just some trivia: Danie van Blerk does in fact have a time of 10.23 seconds. He has the 1073rd best 100 meter dash time. First place, Usain Bolt, has a time of 9.58 seconds.

Answer:

gravitational force

Explanation:

an object with mass attractive another object with mass

ANSWER:

GRAVITATIONAL FORCE

EXPLANATION :

Gravitational force -an attractive force that exists between all objects with mass; an object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.

Answer:

Weight, W = 125 N

Explanation:

Pressure, P = 5 Pa

Area, A = 25 m²

We need to find how much must a man weigh (force) if the pressure he exerts while standing on one foot which has an area of 25 m² exerts a pressure of 5 Pa. So,

Pressure = force/area

So,

[tex]F=P\times A\\\\F=5\times 25\\F=125\ N[/tex]

So, the weight of the man is 125 N.

The main differences between the manual, oscillate and pulse functions are;

A pulse can be regarded as a signal processing which is  is rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value.

The Oscillate function works with automation and it requires some automated system.

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Answer:

A-500 N

Explanation:

The computation of the tension in the chain is shown below

As we know that

F = ma

where

F denotes force

m denotes mass = 7

And, a denotes acceleration

Now for the acceleration we have to do the following calculations

The speed (v) of the hammer is

v = Angular speed × radius

where,

Angular seed = 2 × π ÷ Time Period

So, v = 2 × π × r ÷ P

v = 2 × 3.14 × 1.8 ÷ 1

= 11.304 m/s

Now

a = v^2 ÷ r

= 70.98912 m/s^2

Now the tension is  

T = F = m × a

= 7 × 70.98912

= 496.92384 N

= 500 N

Explanation:

(Sorry but we can prosses your answer)

Answer:

Amplitude

The amplitude ( ) of a wave is the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough .

Explanation:

Hope it helps

The distance traveled by a wave crest in a given time is defined as: D. speed.

A wave can be defined as a disturbance in a medium that progressively transport energy from a source to another location, especially without the transportation of matter.

Some examples of the characteristics of a wave include the following:

In Science, speed refers to the distance traveled by a wave crest in a given time.

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Answer:

The British were determined to crush the rebellion.

They were criminals and made achieving independence more difficult.

Explanation:

Mau-mau were rebellions and wanted to push out British and other Europeans out of Kenya. Mau mau were also the members of the Kikuyu and were making independence more difficult, due to their rebellion attitude. They were a secret society of Kikuyu.

2) The British were determined to crush the rebellion.

3) They were criminals and made achieving independence more difficult.

After British victory in World War II, Kenyatta received a request to return to Kenya in September 1946, sailing back that month. He decided not to bring Edna—who was pregnant with a second child —with him, aware that if they joined him in Kenya their lives would be made very difficult by the colony's racial laws. On his arrival in Mombasa, Kenyatta was greeted by his first wife, Grace Wahu and their children. He built a bungalow at Gatundu, near to where he was born, and began farming his 32-acre estate.

(a) The British were determined to crush the rebellion.

(b) They were criminals and made achieving independence more difficult.

Mau-mau were rebellions and wanted to push out British and other Europeans out of Kenya. Mau mau were also the members of the Kikuyu and were making independence more difficult, due to their rebellion attitude. They were a secret society of Kikuyu.

2) The British were determined to crush the rebellion.

3) They were criminals and made achieving independence more difficult.

After British victory in World War II, Kenyatta received a request to return to Kenya in September 1946, sailing back that month. He decided not to bring Edna—who was pregnant with a second child —with him, aware that if they joined him in Kenya their lives would be made very difficult by the colony's racial laws.

On his arrival in Mombasa, Kenyatta was greeted by his first wife, Grace Wahu and their children. He built a bungalow at Gatun, near to where he was born, and began farming his 32-acre estate.

Thus the British were determined to crush the rebellion.They were criminals and made achieving independence more difficult.

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Answer:

In English traditional grammar, a phrasal verb is the combination of two or three words from different grammatical categories: a verb and a particle, such as an adverb or a preposition — to form a single semantic unit on a lexical or syntactic level. Examples: turn down, run into, sit up.

Explanation:

Answer:

i) The reactants are sodium sulphate and barium chloride

ii) The products are barium sulphate and sodium chloride.

Explanation:

In chemistry, a chemical reaction occurs when one or more chemical substances usually referred to as REACTANTS undergoes some processes and is converted to one or more different substances known as PRODUCTS.

From the question:

Na2SO4 + BaCl2 ⟶ 2NaCl + BaSO4

​The above balanced equation represents the chemical reaction between sodium sulphate and barium chloride. Both are the reactants because they where the substances that passed through a process ( this involves the breaking of bond that held them together).

The PRODUCTS are barium sulphate and sodium chloride because they are the substances that presented at the end of the chemical reaction.

Answer:

The fountain is 3.43 m high.

Explanation:

Circumference of the pool = 15 m.

C = 2[tex]\pi[/tex]r

where C is the circumference and r its radius.

r = [tex]\frac{C}{2\pi }[/tex]

 = [tex]\frac{15}{2(\frac{22}{7}) }[/tex]

r = 2.3864

radius of the pool = 2.40 m

So that the height of the fountain, h, can be determined by applying trigonometric function.

Tan θ = [tex]\frac{opposite}{adjacent}[/tex]

Tan 55 = [tex]\frac{h}{2.4}[/tex]

h = Tan 55 x 2.4

  = 1.4282 x 2.4

  = 3.4277

h = 3.43 m

The height of the fountain is 3.43 m.

Answer:

Biodiesel or biogas vehicles are seen as an element on the path towards energy independence from fossil fuels and relief from unstable oil prices. ... CIVITAS cities test for example the use of biodiesel, biogas, compressed natural gas (CNG) and hybrid vehicles.

Explanation: