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What are energy and work

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Answer 1

Answer:

In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

Explanation:

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Related Questions

A charged particle of 5.1 nC and another with 2.6 nC are separated by a distance of 5.5 m. What is the electric potential energy between the particles?

Answers

Answer:

The electric potential energy between the particles is 2.167 x 10⁻J

Explanation:

Given;

a charged particle, q₁ = 5.1 nC

another charged particle, q₂ = 2.6 nC

distance between the charged particle, r = 5.5 m

The electric potential energy between the charged particles is calculated as;

[tex]U_E = \frac{kq_1q_2}{r}[/tex]

where;

[tex]U_E[/tex] is the electric potential energy between the particles

k is coulomb's constant = 8.99 x 10⁹ Nm²/c²

Substitute the given values and solve for electric potential energy;

[tex]U_E = \frac{kq_1q_2}{r} = \frac{8.99*10^{9}*5.1*10^{-9}*2.6*10^{-9}}{5.5} \\\\U_E = 2.167 *10^{-8} \ J[/tex]

Therefore, the electric potential energy between the particles is 2.167 x 10⁻J

En la etiqueta de un bote de fabada de 350 g, leemos que su aporte energético es de 1630 kj por cada 100 g de producto a) La cantidad de fabada que tiene que comer un hombre si su necesidad energética diaria es 2500 kj para sobrevivir b) El aporte calórico del bote de fabada en calorías

Answers

Answer:

(a) 153.37 g

(b) 5705 kJ

Explanation:

(a) To find the amount of bean needed by a man you first calculate the equivalence in beans to 2500kJ

[tex]2500kJ*\frac{100g}{1630kJ}=153.37\ g[/tex]

Thus, 153.37 g has the energy needed by a man that needs 200kJ per day.

(b) The amount of energy per pot of bean is given by:

[tex]E=350g*\frac{1630kJ}{100g}\\\\E=5705\ kJ[/tex]

Thus, the energy is 5705kJ


What is power?

A. a magnitude of a force needed to move an object
B. how much work can be done in a given time
C. the distance over time that an object moves
D, The energy needed to create work

Answers

Answer:

The answer is B.

Explanation:

The formula of power is :

[tex]power = \frac{work \: done}{time} [/tex]

* Work done can be "Energy"

the answer is a. a magnitude of a force meeded to move an object

explain how muscles and bones work together to help bend the arm.

Answers

Answer:

Bones make sure the arms structure is stable while the muscle is the one actively moving it and carrying out actions.

Which of the following metric system units is used when measuring large quantities of water?

Gallons
Liters
mL
Cup

Answers

Answer:

I want to say Liters but not 100% sure

Which of the following statements about developing a personal fitness program is NOT true?
A When developing a personal fitness program, it is important to implement strategies that will help
maintain the program as well as give it a successful start
B. Personal factors such as age, health concerns, and likes are important to consider when developing
a personal fitness program
C. The starting skill level of the physical activities included in a personal fitness program should be
determined from other individuals' fitness programs
D. The FITT principle should be used when developing a personal fitness program,
Please select the best answer from the choices provided
A
B
Save and Exit
Next

Answers

Answer:

C

Explanation:

The starting skill level of the physical activities included in a personal fitness program should be determined from other individuals' fitness programs is a statement which is not true. Everyone starts their personal fitness journey at a different level which should be regarded . A fitness test should be taken to determine where an individual should start their new lifestyle.

Answer:

C. I got it right :)

Explanation:

Oliver builds a circuit connecting a light bulb to a battery with wires, leaving a gap in one of the wires. He places several objects across the gap to close the loop. He wants to see which objects allow electricity to flow and turn on the light bulb. Why do some materials allow electricity to flow through while others do not?



A. Electricity will flow if the atoms in the material are bound tightly to each other.

B. Electricity will flow if the atoms in the material are bound loosely to each other.

C. Electricity will flow if the electrons are bound tightly to their atoms in the material.

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

Answers

Answer:

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

Explanation:

The continuous flow of charges is known as electricity (current). The flow of these charges are due to free or mobile electron within the atoms of the conductors. The materials which will allow current to pass through them, must have free or mobile electrons which are loosely bound to their atoms.

Thus, the correction for this question is "D"

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

Which of the following is a conversion from light energy to chemical energy?
a. turning on a stove to heat dinner
b. growing an apple tree
c. turning on a lamp
d. Turning on a blender

Answers

Answer:

A

Explanation:

turning on a stove to heat dinner because it undergoes a chemical reaction to transform into other substance

Growing up a tree is a conversion from light energy to chemical energy.

What is law of energy conservation?

Energy can neither be created nor be destroyed , it gets only transferred from one form to another.

What is photosynthesis?The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.In simple words by the process of photosynthesis a tree makes food for itself.

What happens when a tree grows?Tree makes food by absorbing the sunlight.The energy of the sunlight is used in making of ATPs in trees.ATP ( Adenosine triphosphate ) is used in various operations in trees.So, the sunlight is light energy which get converted into ATPs , which is chemical energy.

Thus, Growing up a tree is a conversion from light energy to chemical energy.

Learn more about Photosynthesis here -

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The ____ is a line drawn at a right angle to a barrier. a. normal c. node b. ray d. wave front

Answers

Answer:

a. normal

Explanation:

In the field of physics the normal is a line drawn at a right angle to a barrier. In other words the normal line is the line that is drawn perpendicular (right angle, 90 degrees) to the reflective surface of a mirror, or the particular boundary in which refraction occurs at the point of incidence of a light ray. This can be seen in the picture attached below.

. How does the intensity of sunlight received affect Earth’s temperatures?

Answers

When the sun's rays strike Earth's surface near the equator, the incoming solar radiation is more direct (nearly perpendicular or closer to a 90˚ angle). Therefore, the solar radiation is concentrated over a smaller surface area, causing warmer temperatures.

David delivers meals to elderly people once a week. He uses a cart to move the meals. The cart has four smooth wheels. Which type of friction acts between the cart wheels and the sidewalk?

A. sliding friction
B. rolling friction
C. fluid friction
D. static friction

Answers

Answer:Rolling

Explanation:

Since the wheels roll, the wheels do not rub against the sidewalk, So it cannot be sliding. The wheels are not a liquid, and there shouldnt be any static.

Um joalheiro recebe uma encomenda onde ele deve fazer alguns anéis de prata. Ele dispõe de um pedaço de 100 g de prata mas precisa derrete-lo para colocar a prata em moldes específicos e construir esses anéis. O principal problema desse procedimento é que a temperatura de fusão da prata é muito alta e requer condições especiais. A prata possui temperatura de fusão de 961 ºC, calor latente de fusão de 21 cal/g e calor específico no estado sólido igual a 0,056 cal/gºC. Determine a quantidade de calor aproximada para fundir as 100 g de prata sabendo que sua temperatura inicial é de 20°C. A 2,1 kcal B 0,5 kcal C 7,4 kcal D 5,3 kcal E 6,3 kcal

Answers

Answer:

Correct option: C -> 7.4 kcal

Explanation:

First we need to find the energy necessary to heat the silver from 20°C to 961°. The change in temperature is 961 - 20 = 941, so the energy necessary is:

941 * 0.056 * 100 = 5269.6 cal

Then, for the melting process, we will need:

21 * 100 = 2100 cal

So the total energy needed is:

5269.6 + 2100 = 7369.6 cal = 7.4 kcal

Correct option: C

A paint brush is dropped from the top of a tall ladder and free falls to the ground. What changes, if any, would be observed of the velocity and the acceleration of the brush as it falls? Pick the two answers. The velocity increases. The velocity decreases. The velocity remains a constant value. The acceleration increases. The acceleration decreases. The acceleration remains a constant value.

Answers

Answer:

Explanation:

As the paint brush is dropped from the top of a tall ladder it started free falling

i.e. velocity of brush increases as it falls down due to the acceleration provided by gravity.

We know acceleration due to gravity is the attraction experienced by the object due to earth attraction

Value of acceleration due to gravity is constant i.e. [tex]9.8\ m/s^2[/tex]

Therefore the correct choice is

velocity is increasing and acceleration is constant

what type of stars can collapse in a supernova explosion and become neutron stars

Answers

Answer:

red supergiants can

A 6.0 cm candle is 30.0 cm from a concave mirror that has a focal length
of 11 cm. What is the distance of the image from the mirror?
7 points
0
.09 cm
17 cm
.06 cm
O
20 cm

Answers

Answer:

23 cm from the mirror

Explanation:

WILL NAME BRAINLIEST!!!!!!
Match each word with its definition. Match the items in the left column to the items in the right column. 1. Nucleus of a helium atom 2. Electron ejected by a nucleus 3. Electromagnetic radiation from a nucleus 4. all emissions from a nucleus 5. Nuclear particle that has no charge 6. Nuclear particle that has a positive charge 7. One of several different nuclei of an element 8. Equivalent to the mass discrepancy in a nucleus 9. Measure of a radioactive materials lifetime 10. Unit of nuclear mass

amu
half-life
beta particle
binding energy
proton
radiation
isotope
neutron
gamma ray
alpha particle

Answers

Answer:

Please see the answers in the picture attached below.

Explanation:

Hope this answer can help you. Have a nice day!

A boat at anchor is rocked by waves whose crests are 28 m apart and whose speed is 7 m/s. How often do these waves reach the boat? State your answer in terms of frequency (Hz) and period T (seconds).

Answers

Answer:

0.25 Hz

4 s

Explanation:

Speed = wavelength × frequency

7 m/s = 28 m × f

f = 0.25 Hz

Frequency = 1 / period

0.25 Hz = 1 / T

T = 4 s

Each gas sample has the same temperature and pressure. which sample occupies the greatest volume? each gas sample has the same temperature and pressure. which sample occupies the greatest volume? 40.0 gar 20.0 gne 20.0 gh2 4.0 ghe

Answers

Answer:

20 gram of H as the greastest volume

Explanation:

Each gas sample has the same temperature and pressure. which sample occupies the greatest volume? each gas sample has the same temperature and pressure. which sample occupies the greatest volume? 40.0 gar 20.0 gne 20.0 gh2 4.0 ghe

Given that,

40.0 g of Ar

20.0 g of Ne

20.0 g of h

24.0 g of he

The ideal gas equation ; Pv = nRT

where P is the pressure, V is the volume, R is the gas constant, T is the temperature, n is the number of mole

which is equal to

n = m / M

where m is the given mass

M is the molar mass

The given gas sample are at the same temperature and pressure,

So, the temperature, pressure and gas constant are fixed.

Therefore the volume is proportional to the given mass and molar mass

V ∝ m/M

Substitute the given mass and molar mass of given masses for comparison

No of mole of Ar = mass / molar mass

= 40 / 40 = 1 mole

No of mole of Ne = mass / molar mass

= 20 / 20 = 1 mole

No of mole of h = mass / molar mass

= 20 / 1 = 20 mole

No of mole of he = mass / molar mass

= 24 / 4 = 6 mole

Hence, 20 gram of H as the greastest volume

How do coal deposits found in the U.S. and Serbia help prove the theory of continental drift?

Answers

Answer:

Wegner's hypothesis met with wide skepticism, but found support and development in ... theory because Wegener could not satisfactorily explain how the continents moved.

Explanation:

Some of his theory was proven wrong, but he was still correct about his hypothesis. The fossils were part of proof for the theory because some of the fossils were found on shore line. And, some of those animals couldn't swim. So, this is proof that some animals lived on the land. And over time the land drifted apart.

The acceleration of gravity means that for each second that passes, falling
objects move 9.8 meters.
A. True
B. False

Answers

Answer:

B.

Explanation:

There are many factors that go into the speed that an object drops. For example, aerodynamics, weight, and other things.

Gold, quartz, and talc are minerals. Copper and iron are types of ore. What is the difference between minerals and ores?

A mineral is a non-living, solid substance that can be extracted from the ground. Ore is a type of mineral made up of metals.

An ore is non-living and solid with little value unless it occurs in large amounts, in which case it is a mineral.

O A mineral is a valuable form of ore that can be extracted from the ground

O A mineral is a non-living, solid substance made of elements. Ore is a large deposit of one or more valuable minerals in the ground.

Answers

Answer:

A mineral is a valuable form of ore that can be extracted from the ground

Explanation:

Gold, quartz and talc are minerals because they are found in the earth in a valuable form of ore while ores are rocks that contain valuable concentrations of minerals.that can be mined.

An ORE in general term can be said to be a mineral deposit that contains enough Minerals that can be mined in commercial quantities while Minerals are valuable components of an Ore that can be mined ( naturally occurring ) in an ORE.

How did Confucius believe that kings should behave? (Site 1) HURRY!!!!!​

Answers

Answer:

Confucius believe that kings should behave RIGHTLY

Explanation:

CONFUCIUS  believe that kings are supposed to behave rightly and rule justly ( according to the codes of ethics )  of the land and also live a right and just life.

Confucianism is an ancient philosophy established as far back as the fifth century by Confucius it's main aim was to guide the ancient and modern systems of government in the whole of Asia. it is called a religion by some while some call it a code of ethics and way of leadership

Answer:

CONFUCIUS  believe that kings are supposed to behave rightly and rule justly ( according to the codes of ethics )  of the land and also live a right and just life.

Confucianism is an ancient philosophy established as far back as the fifth century by Confucius it's main aim was to guide the ancient and modern systems of government in the whole of Asia. it is called a religion by some while some call it a code of ethics and way of leadership

Explanation:

if the 50 kg objects slows down to a velocity of 1 m/s how much kinetic energy does it have?

Answers

Answer: 25

Explanation:

The kinetic energy of the object moving at the given mass and velocity is 25 J.

The given parameters;

mass of the object, m = 50 kgvelocity of the object, v = 1 m/s

The kinetic energy of the object moving at the given mass and velocity is calculated as follows;

K.E = ¹/₂mv²

K.E = ¹/₂ x 50 x 1²

K.E = 25 J

Thus, the kinetic energy of the object moving at the given mass and velocity is 25 J.

Learn more here:https://brainly.com/question/23503524

The baker needs 9 eggs, 6 cups of flour, 3 cups of sugar, and 3 sticks of butter to make a total of 3 cakes.. The baker only has 2 sticks of butter. That means the butter is the ___________ because the baker can only make 2 cakes!
Question 19 options:


Product


Reactant


Limiting reactant


Spontaneous reactant

Answers

Answer: Limiting reactant

Explanation:

The limiting reactant is a reactant will get completely consumed up in the reaction. This reactant being in low concentration will lead to the formation of limited amount of product.

In the given situation, since the butter cakes are required to be 3 sticks for making 3 cakes but only 2 cakes are available thus the butter stick is the limiting reactant.

What is the critical angle for glass when the refractive index is 1.45

Answers

Answer:43.6°

Explanation:

Refractive index=n=1.45

Critical angle=c

n=1/sinc

1.45=1/sinc

Cross multiply

1.45sinc=1

Divide both sides by 1.45

(1.45sinc)/1.45=1/1.45

sinc=0.6897

c=sin(inverse)(0.6897)

c=43.6°

Critical angle is 43.6°

why are fuels from crude oil so widely used for transportation

Answers

because it was a better oil

Jada’s family pulls into a gas station. Her mother fills up the car’s tank with fuel from a pump. Jada notices this symbol on the pump.

Image shows a pump at a gas station with a symbol of corn on it.

What do you think the symbol indicates?
A. This gasoline is to be used only in farm vehicles.
B. It is not safe to have gasoline around food products.
C. This gasoline can also be used as a fertilizer to help plants grow.
D. A biomass has been used as part of the fuel.

Answers

Answer:

D- a biomass has been used as a part of the fuel.

How does the current values in and out of the battery compare to the sum of currents going through the light bulbs?

Note: This is for Parallel circuits.

Answers

The current values in and out of the battery is going to be equal to the sum of the currents going through the light bulbs. In a parallel circuit, the current is divided as it enters different branches and light bulbs. However, the amount of current leaving the battery is always going to be the same as the amount of current entering the battery. Therefore, while current divides in a parallel circuit, the total amount of current always remains the same.


a 25 ohm resistor in an electric circuit draws a current of 5 amperes a certain amount of charge through the resistor in 36 seconds calculate the voltage

Answers

Answer:

V= 125volts

Explanation:

R =25ohms

I = 5 amp

V = ?

t = 36seconds

V = IR

V = 5× 25

V= 125volts

Q = It

Q = 5×36

Q = 180 coulombs

Q is the amount of charge.

How does the temperature of water affect the speed of the sound waves?

Answers

Answer:

Temperature is also a condition that affects the speed of sound. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly.

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Under the allowance method of accounting for uncollectible accounts, a. the cash realizable value of accounts receivable is greater before an account is written off than after it is written off. b. Bad Debts Expense is debited when a specific account is written off as uncollectible. c. the cash realizable value of accounts receivable in the balance sheet is the same before and after an account is written off. d. Allowance for Doubtful Accounts is closed each year to Income Summary. 6) This Egyptian leader united Upper and Lower Egypt and was the firstPharaoh Determine the value of X in the diagram below. Justify your reasoning. The price of a cup of coffee was $2.35 yesterday. Today, the price fell to $2.10. Find the percentage decrease. Round your answer to the nearest tenth of a percent. Which equation demonstrates the additive identity property?(7 + 4i) + (7-4i) = 14(7 + 4i) + 0 = 7 + 4i(7 + 4i) ( 1 ) = 7 + 4i(7 + 4i) + (-7- 4i) = 0 How do u find the unknown angle measure in a triangle When you add fractions is the sum always greater than 1? F(x)=x^2 what is g(x) Do humans have DNA or RNA in the nucleus of your cells? Complete the point-slope equation of the line through (-9,6)(9,6)left parenthesis, minus, 9, comma, 6, right parenthesis and (-7,-8)(7,8)? Divide and answer in simplest form: 4/5 2 Which word equation represents a neutralization reaction? *base + acid salt + waterbase + salt water + acidsalt + acid base + watersalt + water acid + base Compute: 10:00 - 2:30 2 PointsWhat was an effect of careful planning for cities?A. Increased interest in cultural activitiesB. Ending of urban growthO C. Efforts to reduce safety lawsD. Improved lives for all classesSUBMIT please Helps its urgent On December 31, 2017, Berclair Inc. had 560 million shares of common stock and 5 million shares of 9%, $100 par value cumulative preferred stock issued and outstanding. On March 1, 2018, Berclair purchased 168 million shares of its common stock as treasury stock. Berclair issued a 5% common stock dividend on July 1, 2018. Four million treasury shares were sold on October 1. Net income for the year ended December 31, 2018, was $1,050 million. Also outstanding at December 31 were 30 million incentive stock options granted to key executives on September 13, 2013. The options were exercisable as of September 13, 2017, for 30 million common shares at an exercise price of $56 per share. During 2018, the market price of the common shares averaged $70 per share. Required: a. Compute Berclair's basic and diluted earnings per share for the year ended December 31, 2018. In IJK, the measure of K=90, JK = 90 feet, and KI = 54 feet. Find the measure of I to the nearest tenth of a degree. The Dust Bowl caused damage in _____________.a.Central Texas and the Gulf regionb.West Texas and the Panhandlec.West Texas and the Mexican border aread.Southeast Texas and the Louisiana border areaPlease select the best answer from the choices providedABCD A cylinder has a radius of 5 cm and a height of 10 centimeters What is its volume? ill give 17 points for this!