Define work What is the unit for work? For Physics, thanks.

Answers

Answer 1

Answer:

Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement

Explanation:


Related Questions

Will an object experience a greater force of gravity on the earth or moon? Why?

Answers

Answer:

Earth’s gravitational force is stronger

Explanation:

Earth’s gravitational force is stronger than the moon because of the presence of more massive objects in earth; on the flip side, the moon’s gravity is weaker than the earth due to smaller in size as compared to the earth. Earth gravity is denoted by g; conversely, moon gravity is denoted by gm

Answer: The greater an object's mass, the more gravitational force it exerts. So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. That's why the moon isn't pulled out of Earth's orbit by the gravity of larger planets or by the sun.

Explanation:

Calculate the energy used by a 0.011 kW lightbulb in 1 minute. Use the formula: energy (J) = power (W) × time (s)

Answers

Answer:

660

Explanation:

0.011kW = 11W

energy = 11 x 60

            = 660J

The baser would be 660 do u need steps

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?

Answers

Answer:

45 Ampere

Explanation:

R=V/I I=V/R V = 9 R=0.2 I = 9/0.2 = 9×10/0.2×10 =90/2 ie, I =45 A

The current produced by a 9-volt battery flowing through a resistance of 0.2 ohms would be  45 Ampere.

What is resistance?

Resistance is the obstruction of electrons in an electrically conducting material.

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

As given in the problem we have to find the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms.

current produced by a 9-volt battery  = voltage /resistance

                                                              = 9 volt /0.2 ohms

                                                              = 45 Ampere

Thus, the current produced would be 45 Ampere.

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Any change in an object's velocity is caused by
A. the object's mass
B. a balanced force
C. an unbalanced force
D. the object's direction

Answers

C. An unbalanced force

Answer:

C. an unbalanced force

Explanation:

I hope it helps ❤❤

Which is considered a dark green vegetable?
A.
Carrots
B.
Broccoli
C.
Squash
D.
Green peas

Answers

Answer:

Broccoli

Explanation:

Answer:

b. broccoli

Explanation:

took the quiz

hope this helps

pllllllllllllllllllssssssssss help me will give brainiest if correct

Answers

Answer:

I believe it is the same as before-Electrical energy is transformed into heat and light energy.

Explanation:

Hope this helps'-'

Chemical energy (in his muscles) ===> kinetic energy ===> electrical energy ===> light energy and a little bit of heat energy

What forces act to pull the poles of a magnet together, or to push them apart?​

Answers

Answer:

Gravity,

I hope this correct

What is another name for the rare earth elements?
a.
Group 1
c.
Group 6
b.
Lanthanide
d.
Alkaline Earth

Answers

Explanation:

lanthanide is another name for the rare earth

elements.

Answer:

use common sense

Explanation:

Es aquel tipo de pensamiento que surge en un proceso individual, personalizado, fomentado por la indagación y el cuestionamiento.

Answers

Answer:

Pensamiento crítico.

Explicación:

El pensamiento crítico es ese tipo de pensamiento que surge en un individuo o en un proceso, fomentado por la indagación y el cuestionamiento. Desde el punto de vista de un estudiante, el aprendizaje basado en la indagación se centra en investigar un problema utilizando un método científico. En este tipo de aprendizaje, el razonamiento se realiza a la luz de la evidencia y se resuelve el problema para extraer una conclusión, la cual debe ser defendida mediante un razonamiento fuerte. Este tipo de indagación ayuda al individuo a aprender cosas nuevas.

How is velocity different from speed? Based on distance and/or direction

Answers

Answer:

Speed is solved with time and distance but has no direction

Average velocity is solved with Δx/Δt and has a direction

Write 3 things you want to learn about the ocean.

Answers

Answer: How it was created, The frequency of the waves, and is the water salty enough to kill someone.

Explanation:

Just from my brain.

Answer: the ecosystem , differnt species of fish, and ship wrecks

Explanation:

:)

Explain two negative effects of friction

Answers

disadvantages

Explanation:

releases heat when not required

opposes motion

Advantages- you have friction
Disadvantages- at one point it will end and you will not longe have friction

Find focal length of a concave mirror having 40 cm radius of curvature​

Answers

Answer:

The focal length of the given spherical mirror is 20cm.

Explanation:

plz follow me

Find the following answer based on the image.

Answers

We are given:

Mass of Neptune = 1.03 * 10²⁶ kg

Distance from the center of Neptune (r) = 2.27 * 10⁷

now, computing the value of the acceleration due to gravity (g)

Finding g:

We know the formula:

g = G(mass of planet) / (r)²

g = [6.67 * 10⁻¹¹ * 1.03*10²⁶] / (2.27*10⁷)                      [since G is 6.67*10⁻¹¹]

g = (6.87 * 10¹⁵) / (5.15 * 10¹⁴)

which can be rewritten as:

g = (6.87 * 10¹⁵ * 10⁻¹⁴) / 5.15

g = (6.87 * 10¹⁵⁻¹⁴) / 5.15

g = (6.87/5.15) * 10

g = 1.34 * 10

g = 13.4 m/s² (approx)

Can someone help me solve this?

Answers

Answer:

so the answer is number one which is A

True or False

Chemical reactions in batteries produce a voltage difference between the positive
and negative terminals.

Answers

Answer:

true

Explanatiohope this helps

Which of these can spread a pathogen?

Answers

Where is the image? Because I dnt see anything

Answer:

there is no image to go off of. If you could share that I would be happy to help.

Explanation:

Please share the image!

The mass of an object is the measure of what characteristic of the object?
O A. its volume
OB. the space it occupies
O c. the amount of matter it has
O D. its weight
please help asap

Answers

Mass is a measure of the amount of matter in a substance or an object.

A projectile is shot horizontally from the edge of a cliff, 400 m above the ground. The projectile is traveling horizontally at 65 m/s the moment it leaves the cannon.

What is the initial vertical velocity of the projectile?

Determine the time taken by the projectile to hit the ground.

How far does the projectile land from the base of cliff?

Find the vertical component of the velocity just before the projectile hits the ground.

What is the magnitude of the final vector velocity the instant before it hits the ground?

What is the direction of the final vector velocity the instant before it hits the ground?

Answers

Answer:

a)  [tex]v_{oy}[/tex] = 0,  b)  t = 9.035 s, c) x = 587.275 m, d)  v_y = -88.54 m / s,

e) v = 109.84 m / s,  f)  θ = -53.7º

Explanation:

This exercise is a projectile launch

a) as the projectile is launched horizontally, its initial vertical velocity is zero

          [tex]v_{oy}[/tex] = 0

b) let's use the relation

          y = y₀ + v_{oy} t - ½ g t²

when reaching the ground y = 0 and the initial vertical velocity is v_{oy}=0

         0 = y₀ + 0 - ½ g t²

         t = [tex]\sqrt{ \frac{2 v_o}{g} }[/tex]

         t = [tex]\sqrt{ \frac{ 2 \ 400 }{ 9.8} }[/tex]

         t = 9.035 s

c) the horizontal distance is

         x = v₀ₓ t

         x = 65  9.035

         x = 587.275 m

d) the vertical speed when touching the ground

         v_y = [tex]v_{oy}[/tex] -gt

         v_y = 0 - 9.8 9.035

          v_y = -88.54 m / s

the negative sign indicates that the velocity is directed downwards

e) the velocity at this point

          v = [tex]\sqrt{ v_x^2 + v_y^2}[/tex]

          v = [tex]\sqrt{65^2 + 88.54^2}[/tex]

          v = 109.84 m / s

f) the direction of the velocity

let's use trigonometry

          tan θ = v_y / vₓ

          θ = tan⁻¹1 v_y / vₓ

          θ = tan⁻¹ (-88.54 / 65)

          θ = -53.7º

this angle is measured clockwise

A driver pushes on a car with a force of 8000 N for 15 seconds but is unable to move it. How much work is done

Answers

Answer:

the work done is zero.

Explanation:

Given;

applied force, F = 8000 N

time of force application, t = 15 s

Work done is given as the product of force and displacement. Since the car is unable to move, then the displacement is zero and the work done is zero.

Work done = Force x displacement

Work done = 8000 N x 0

Work done = 0

Therefore, the work done is zero.

How might electric fields be involved in a levitation device?

Answers

Answer:

When a magnet is moving relative to a conductor in close proximity, a current is induced within the conductor. This induced current will cause an opposing magnetic field. This opposing magnetic field can be used to levitate a magnet.

Explanation:

Your teacher gives you samples of the following elements. Which sample is shiny but does not conduct heat and electricity well? (DOK 2)

A.
fluorine (F)

B.
silver (Ag)

C.
germanium (Ge)

D.
neon (Ne)

Answers

A. Fluorine
it does not conduct electricity and heat

Fluorine is the sample which is shiny but does not conduct heat and electricity through it. The flow of electricity requires the flow of electrons or charged particles. Thus, the correct option is A.

What are conductors?

A conductor is a substance, chemical element, or a material which allows electricity and heat to flow through it. In a conductor, the electrical charge carriers which are usually electrons or positive and negative ions, move easily from one atom to another atom when a particular amount of voltage is applied.

Fluorine is a shiny element however it does not conduct heat and electricity through it. It is the most electronegative atom and is very reactive in nature. It only gains electrons and does not lose them. And because of this property of fluorine, it restricts the movement of electrons through it and fails to conduct electricity.

Therefore, the correct option is A.

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a man shoveling snow clears his front step using 200 joules in 100 seconds, how much power did he use

2 watts
20,000 watts
100 watts
300 watts​

Answers

Answer:

2 watts

Explanation:

2 watts

200 J divided by 100 S = 2

Identify each part of this chemical equation that describes the burning of methane and oxygen. B (blue box): D (number): E (purple box):

Answers

Answer:

The correct answer is -

A (the entire green box): Chemical Equation

B (the blue box): Reactants

C (the arrow): Reacts to Form

D (the number): Coefficient

E (the purple box): Products

Explanation:

The chemical reaction of burning methane and oxygen is as follows;

Here, the green part A is the chemical equation that includes various parts that are reactants B, methane, and oxygen, C is an arrow that indicates the formation of products.

2 is here coefficient that indicates the moles of the oxygen which forms carbon dioxide and water in box E is products

Answers:

A (the entire green box):  chemical equation

B (the blue box): reactants  

C (the arrow):  reacts to form

D (the number):  coefficient

E (the purple box):  products

Explanation:

As seen in the picture below,

explain why a solid steel ball sinks in water but a steel ships floats in water

Answers

Answer:

floating had to do with the pressure rather than the weight

Explanation:

the water pressure on the bottom of the boat is so hard and pushing that it causes it to float.. And the steel ball has alot of density. which is causing it to sink

Answer:

because of its displacement, a ship displaces water. when a steel ball does not.

LOOK AT PICTURE FOR QUESTION
What is the second daughter element from the nuclear fission reaction shown below? (solve
for x) *
(3 Points)

Answers

Answer:Cs

Explanation: for this one 92-37 is 55

I NEED HELP ASAP!!

What is the path of a projectile (in the absence of friction)?
a.
a wavy line
b.
a parabola
c.
a hyperbola
d.
Projectiles do not follow a predictable path.


Please select the best answer from the choices provided

A
B
C
D

Answers

Answer:

Your answer should be B. a parabola.

Explanation:

The path of the projectile in the absence of friction is a parabola. Therefore, option (b) is correct.

What is the projectile motion?

Projectile motion can be described as a form of motion experienced by a projectile that is projected near the surface of the earth and moves along a curved path under the action of gravity. This curved path is to be a parabola, but may also be a straight line in special cases when the projectile is thrown directly upwards.

The study of such motions is known as ballistics and the only force that is actively exerted is gravity, which acts downward, thus giving the object a downward acceleration toward the Earth’s center of mass.

No external force is required to maintain the horizontal velocity component of the object's motion because of the object's inertia. Other forces, such as aerodynamic drag or internal propulsion need additional analysis.

Therefore, the path of an object or projectile is generally parabola in the absence of friction.

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Change the following back to a standard number... (3.15 x 10-3)

Answers

You mean simplify it? I don’t see how this is a physics question.

What is elementary entities?​

Answers

Are any of several entities such as electrons, neutrons , protons that are less complex than atoms

Answer:

Answer: Elementary Entities are any of several entities, such as electrons, neutrons, or protons, that are less complex than atoms and are regarded as the constituents of all matter.

????????????????what’s the answer

Answers

Answer:

I don't know what do u. mean

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