A certain light bulb consumes 200J of electrical energy per second, but only emits 25J of light energy per second. Calculate the efficiency of this bulb.

Answers

Answer 1

Answer:

The answer is 12.5%

Explanation:

The efficiency of a light bulb is:

Light energy comes out of the bulb / Electrical energy that was put in

= 25J / 200J = 12.5%

Answer 2
12.5% it told me that it had to be 20 characters long to submit it so there

Related Questions

What is a healthy way to cope with distress

Answers

Sleeping and eating

When a cup of water, held upright, is dropped on the moon, the air makes the
cup fall faster than the water.
O A. True
B. False

Answers

Answer:

False

Explanation:

They both posses constant acceleration

B - False

hope this helps

Use the drop-down menus to answer the questions.
Which type of mirror curves outward?

Which type of mirror always has an image that is smaller than the object?

Which type of mirror is used to focus light rays?

Which type of mirror has a flat surface?

Answers

Explanation:

1. Convex mirror is curved outward.

2. Convex mirror forms an image that is smaller than the object.

3. Concave mirror is used to focus light rays. That's why it is also known as a converging mirror.

4. Plane mirror has a flat surface. It forms the same size of the image as that of the object.

The reflective surface of a convex mirror, also known as a curved mirror, bulges toward the light source.

Thus, A curved mirror's surface can be convex, meaning it bulges outward, or concave, meaning it bulges inward. Since a convex mirror reflects light outward, it cannot be utilized to concentrate light.

Because the focus and center of curvature are fictitious positions inside the mirror and are therefore unreachable, convex mirrors or curved mirrors always produce a virtual image.

As a result, convex mirror images cannot be projected onto a screen. The picture is also smaller than the projected object, but it grows larger as it goes closer to the convex mirror.

Thus, The reflective surface of a convex mirror, also known as a curved mirror, bulges toward the light source.

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How many kilograms are in 2.5 grams ?

Answers

Answer:

0.0025 kilograms

Explanation:

There are a 1000 grams in 1 kilogram, so that means that there are

0.0025 kilograms in 2.5 grams.

Answer:

Below

Explanation:

● 1 kg = 1000 g

Divide both sides by 1000

● 1/1000 kg = 1000/1000 g

● 0.001 kg = 1 g

Multiply both sides by 2.5

● 2.5 g = 0.001 × 2.5 kg

● 2.5 g = 2.5 × 10^(-3) kg

● 2.5 g = 0. 00 25 kg

Guys I really need help with this question ): can someone give me the answer to this thanks

Answers

Answer:

the answer is

D) -1.5

Explanation:

[tex] \frac{ - 1.5}{1} [/tex]

move -1.5 down

then 1 right

The answer is D I hope this helps you

Contrast electron movement within conductors and insulators.

Answers

Answer:

Electrons surrounding a nucleus are attracted to the protons within it because electrons and protons have opposite charges. Electrons closest to the nucleus are attracted with such a force that they can’t escape from the atom. These electrons tend to shield the protons from electrons that are farther away because electrons have the same charge and repel each other. Electrons that are farther away have less attraction to the protons within the nucleus and are more likely to be detached from the atom.

Electrons can be transferred from atoms of one body to atoms of another body through friction. This can occur when one body is rubbed against another or when a liquid flows across a solid. In either case, one body may be given a positive charge while the other body is given a negative charge of the same magnitude. Both charges are developed at the same time. Electrons can also be transferred from one body to another when a charged body comes into contact with an uncharged body. The electrons move in the direction that will equalize the charges; thus, the uncharged body will be given the same charge as the charged body.

Free electrons move from points of negative charge to points of positive charge. When these electrons move freely from one point to another with little resistance, the material they’re traveling through is said to be a conductor. Conductors have a large number of free electrons. Insulators, on the other hand, have very few free electrons and offer great resistance to the movement of these electrons. Electric charges produced on one end of a body composed of insulating materials will most likely not spread throughout the body. In a conductor, this charge would spread throughout the entire body. Metals are generally conductors; oils, rubber, air, porcelain, and plastics are good insulators.

Lightning is produced by the rapid transfer of free electrons when one of the following conditions exist:

One part of a cloud is positively charged and a neighboring part of the same cloud is negatively charged.

A positively charged cloud comes near a negatively charged cloud.

A cloud with either a positive charge or a negative charge comes near the earth.

Explanation:

Free electrons are abundant in conductors. Conversely, insulators provide a high level of barrier to the movement of these free electrons, since they have some of them. In a body made of insulating materials, electric charges generated on one end are likely to remain localized there.

What are conductors?

Electrons can move freely between particles when they are in conductors, which are substances. The charge can be transported across the whole surface of an object constructed of a conducting substance.

Because distant electrons have the same charge as these nearby ones and resist one another, these electrons usually act as a shield for protons. Further distant, electrons are less attracted to the nucleus's protons and are therefore more prone to break away from the atom.

Free electrons migrate from negatively charged to positively charged locations. The substance these electrons are passing through is referred to as a conductor when it allows them to go easily from one location to another with little resistance. Electrons are abundantly free in conductors.

A body made of insulating materials will likely not conduct electricity when it generates charges on one end. This charge would permeate the entire body of a conductor. Oils, rubber, air, porcelain, and plastics are effective insulators while metals are typically conductors.

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At what distance from the centre of the earth its acceleration due to gravity becomes one third only? [Mass and radius of earth = 6x10 24 kg & 6.4x10 6 m resp.]

Answers

Answer:

235

Explanation:

235 is the answer sir

A TV set shoots out a beam of electrons. The beam current is 10A. How many electrons strike the TV screen in a minute.

Answers

Answer:

600 mC

Explanation:

The charge of an electron is 1.6 x 10-19C so for a current with 10 mA, the charge going to screen in one second is 10 mC

so number of electrons, n = (10 x 10-3)/(1.6 x 10-19) = 6.25 x 1016  so in a minute the charge is 10 * 60 = 600 mC

Answer:

Total charge, q = It = 10 A x 60 s = 600 C

We know that, q = ne

So no. of electrons, n = q/e = 600 / (1.6×10-19) = 375x1019

What kind of information would be published in the Occupational Outlook Handbook (OOH)?


training guides for a chosen field

religious demographics of workers in a chosen field

current job openings in a chosen field

prospects for growth in a chosen field

Answers

Answer:

Explanation:growth of field is according chatestrophic reactions in physics due to radiation of sun

C would be the right answer

When an object is fully magnetized, all of its magnetic domains will be ?
A
Facing random directions,
B
Facing opposite directions, split down the middle of the object.
С
Facing opposite directions every-other domain
D
All facing the same direction.

Answers

the answer is to this question D
The answer would be D

Which statement is true of the electric field at a distance from the source charge?
O A. It is independent of the source charge.
OB. It is directly proportional to the source charge.
OC.
It is inversely proportional to the source charge.
OD.
It is directly proportional to the distance.

Answers

Answer:

the correct answer is B. it is directly proportional to the source charge.

Answer:

B is the correct answer.

What percent of the gross domestic product (GDP) is currently generated by the service industry?


68 percent

71 percent

82 percent

95 percent

Answers

The answer is 71 percent. To be more exact, it is 70.38.

The global economy is heavily reliant on the service sector, which accounts for more than two-thirds of global GDP, over three-quarters of foreign direct investment in advanced nations, the majority of worker employment, and the majority of job growth. Thus, option B is correct.

What GDP is generated by the service industry?

The service sector, often known as the tertiary sector, makes up the third tier of the three-sector economy. Instead of creating products, this sector provides training, consulting, and maintenance and repairs.

The GDP of the nation is significantly impacted by the service sector. Through trade in services, it not only generates many jobs, but also significantly improves the country's economic performance.

Therefore, 70% of GDP is made up of consumer expenditure. The retail and service sectors are important to the American economy.

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PLS HELP. I WILL MARK U THE BRAINLIEST IF U ANSWER EVERYTHING STEP BY STEP AND CORRECTLY.

Answers

distance is the length of his trip so 15( 3+4+8)

displacement is how far he is from his original point ( -5)( -4^2 + 3^2 = 5^2) he was displaced 5 meters from his start position

the distance covered would be 15m and the displacement is 5m . Mark me brainliest bro

Johnathan wants to lift a 200N box onto a 5m ledge. How much work is done?
a. 1000 J
b. 40 J
c. 0.025 J
d. 195 J

Answers

Answer:

1000 J which agrees with answer a in your list of options

Explanation:

Recall the formula for work (W) as the force (F) applied times the distance (d) covered in the same direction of the force:

W = F * d

W = 200 N * 5 m = 1000 J

the answer is - a - 100 j

HELP PLSSSSSSS ASAP FIRST CORRECT ANSWER WILL GET BRANLIST. A bunny accidentally knocks a basket of eggs off of a table. Luckily the basket lands safely on the floor with all the eggs unbroken. Air resistance is negligible. What is the acceleration of the egg-basket system in midair? A)The acceleration cannot be determined without knowing how hard the basket was pushed. B) Acceleration is downward and less than g because the eggs are light. C) The acceleration fluctuates because of the rolling of the eggs. D) Acceleration is downward with a magnitude of g because the system is a projectile.

Answers

Answer: i think is C

Explanation:

Because eggs do not have a good weight and the basket swings because not all eggs weigh the same there are small and large in the basket

I think it's this good luck :)

Answer:

Acceleration is downward with a magnitude of g because the system is a projectile.

Explanation:

If the cross-sectional area of a wire is decreased while all other factors remain the same, how will the resistance change?
OA
It will increase
OB.
It will decrease.
OC. It will go to zero.
OD
The cross-sectional area does not affect the resistance.

Answers

Answer:

The answer is OA it will increase.

Explanation:

OA I just answer that question

In order to stop experimental subjects from trying to confirm the scientist's hypothesis, psychologists sometimes obtain written promises from participants to be honest maintain subject confidentiality deceive participants about the true purpose of the experiment allow people to choose when they want to leave the study remove participants from the study before it starts

Answers

Answer:

C deceive participants

Explanation:

It is ethical practice to come clean or tell the truth about being deceptive at the end of the study.  They need to be told that they were deceived.  

In order to stop experimental subjects from trying to confirm the scientist's hypothesis, psychologists sometimes deceive participants about the true purpose of the experiment. The correct option is C.

What is psychologists?

Psychologists can help people learn to cope with stressful situations, overcome addictions, manage chronic illnesses, and administer tests and assessments that can aid in the diagnosis of a condition or reveal more about a person's thoughts, feelings, and behaviors.

Psychotherapy can be aided by both psychologists and psychiatrists.

However, most psychiatrists treat patients primarily through medication, whereas psychologists primarily treat patients through talk and/or behavioral therapy.

People seek the help of a clinical psychologist to deal with mood-related issues such as depression, mania, anger, or anxiety.

Psychologists sometimes deceive participants about the true purpose of the experiment in order to prevent experimental subjects from attempting to confirm the scientist's hypothesis.

Thus, the correct option is C.

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In the diagram, q1= +8.0 C, q2= +3.5 C, and q3 = -2.5 C. q1 to q2 is 0.10 m, q2 to q3 is 0.15 m. What is the net force on q2? Label sign for charges (+ or -). (Unit = N). pls help?

Answers

Answer:

f(t) =  28,7 [N]

Explanation: IMPORTANT NOTE: IN PROBLEM STATEMENT CHARGES ARE IN C (COULOMBS) AND IN THE DIAGRAM IN μC. WE ASSUME CHARGES ARE IN μC.

The net force on +q₂  is the sum of the force of +q₁  on +q₂ ( is a repulsion force since charges of equal sign repel each other ) and the force of -q₃ on +q₂ ( is an attraction force, opposite sign charges attract each other)

The two forces have the same direction to the right of charge q₂, we have to add them

Then

f(t) = f₁₂ + f₃₂

f₁₂ = K * ( q₁*q₂ ) / (0,1)²

q₁  = + 8 μC     then   q₁ = 8*10⁻⁶ C

q₂ =  + 3,5 μC  then  q₂ = 3,5 *10⁻⁶ C

K = 9*10⁹  [ N*m² /C²]

f₁₂ = 9*10⁹ * 8*3,5*10⁻¹²/ 1*10⁻²   [ N*m² /C²]* C*C/m²

f₁₂ = 252*10⁻¹ [N]

f₁₂ = 25,2 [N]

f₃₂ =  9*10⁹*3,5*10⁻⁶*2,5*10⁻⁶ /(0,15)²

f₃₂ =  78,75*10⁻³/ 2,25*10⁻²

f₃₂ =  35 *10⁻¹

f₃₂ =  3,5 [N]

f(t) =  28,7 [N]

Answer:

facts

Explanation:

How many millimeters are 120 meters ? Help ! Please <3

Answers

The answer is 120000

3. There are twice as many people in the household, but your income has also doubled. Is your new

tax liability about twice as much as when you were single, more than twice as much, or less than

twice as much? Tell whether you think this difference-or the lack of one-seems fair.

Answers

Answer:

The answer is less than twice as much.

Explanation:

When the income doubles, the personal tax liability also doubles. However, because I have more dependents on my household, I'm able to get tax reductions to take care of the dependents.

The answer is less than twice as one

PLS HELP. WILL MARK AS THE BRAINLIEST. PLS ANSWER STEP BY STEP.

Answers

Answer:12

Explanation:

its the way u read it

Your answer would be twelve.
Your answer is always depending on how you read your problem.


When an object is fully magnetized, all of its magnetic domains will be ?

Answers

Answer:

magnetically saturated

Explanation:

When all of the domains are aligned, the material is said to be magnetically saturated. When a material is magnetically saturated, no additional amount of external magnetization force will cause an increase in its internal level of magnetization.

hope this helps u :)

There are traits like blood type and eye color, and others like speaking English or having a scar. What are the terms used to describe these different types of traits? How are each defined?
PLEASE ONLY ANSWER IF YOU KNOW
WILL GIVE BRAINLEIST

Answers

depending on Genetics the father genes depend on everything because they give most of the heredity and genetics to the child more than the mother does

hybrid is one out of two ways to describe this

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same?
OA.
Resistance is directly related to length.
OB.
Resistance is directly related to the square of the length.
O c. Resistance is inversely related to the length.
OD.
Resistance is inversely related to the square of the length.

Answers

Answer:

It is proportional or directly related....

HOPE YOU RATE THE ANSWER..
The correct answer to the question is that the resistance and length of the wire are directly proportional to each other. EXPLANATION: The resistance of the wire is defined as the opposition to the flow of current in the wire.

Which of the following could be used to convert chemical energy to heat energy?
a. a chair sitting still
c. a leaf absorbing sunlight
b. a battery powering a flashlight d. a rock hitting the ground

Answers

Answer:

C

Explanation:

Inside a battery there are chemical reactions. When the battery is powering a flashlight, this chemical energy gives a heat one.

your answer will be a battery powering a flashlight

In the diagram, q1 = +6.60*10^-9 C and q2 = +3.10*10^-9 C. Find the magnitude of the total electric field at point P. pls help?

Answers

Answer:

|E(t)| = 1258,46 [N/C]

α = 67,5⁰  (angle with respect x-axis)

Explanation:

E(t)  Electric Field is a vector, so we need to determine module and direction

E(t)  =  E(q₁)  + E (q₂)  Where E(q₁) and E (q₂) are electric fields due to electric charge q₁ and q₂  respectively.

E(q₁) = K * q₁/ (d₁)²         K = 9 *10⁹   [N*m²/C²]    d₁ = 0,350 m

E(q₁) = 9 *10⁹ * 6,6*10⁻⁹ / 0,1225      [N*m²/C²] *C/m²

E(q₁) = 484,9 [N/C]

E(q₂) =  9 *10⁹ * 3,1*10⁻⁹ / 0,024025

E(q₂) = 1161,29

Then

|E(t)| = √ |Eq₁|² + |Eq₂|²

|E(t)| = √ ( 484,9)² +( 1161,29)²

|E(t)| = √ 235128 + 1348594,46

|E(t)| = 1258,46 [N/C]

And tanα = 1161,29/484,9        tanα =  2,395      α = 67,5⁰

The angle of the vector electric field with the x-axis

Answer:

1258.46 N/C

Explanation:

acellus

fill in the term to complete each sentence

a wave carries___ from one place to another.
mechanical waves carry energy through___.

Answers

Energy

A material medium

A wave carries energy from one place to another. Mechanical waves carry energy through a material medium.

What is a wave?

A wave is a phenomenon that flows across a material medium without leaving any lasting mark.

Mechanical or electromagnetic waves can be used to classify them. Transverse and longitudinal are the two main forms.

A wave carries energy from one place to another. Mechanical waves carry energy through a material medium.

Hence the correct options for the fill-in-the-blanks are energy and a material medium.

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if a source of sound waves is rabidly approaching a person the sound heard by the person appears to have?

Answers

Answer:

have a frequency. higher than the frequency actually produced by the source.

Explanation:

Answer:

If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have - a pitch lower than the original pitch.

I need help with this question I added an image so y’all can see !

Answers

Answer:

a) .66

Explanation:

from (0,4) to (3,6)

the slope would be

[tex] \frac{2}{3} [/tex]

when diving the fraction the half slope is .66666...

The way I learned was to count the ”rise over run”. Count how many blocks are between the origin and point 4, obviously 4 blocks. (this is the ”rise”) Next, you count the number of blocks between -6 and the origin, 6. (this is your run). Then you place the rise over run to get 4/6 then divide to get 0.66. ☺️

How many milligrams in 1 gram. ??? HELP !!!

Answers

1,000 milligrams = 1 gram
2,000 milligrams = 2 grams
3,000 milligrams = 3 grams
4,000 milligrams = 4 grams
1,000 milligrams = 1
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An object is placed in a room where the temperature is 20 degrees C. The temperature of the object drops by 5 degrees C in 4 minutes and by 7 degrees C in 8 minutes. What was the temperature of the object when it was initially placed in the room Place the following events in correct chronological order, from earliest to latest: A. Japan invades Manchuria, Tripartite Pact signed, US Oil embargo B. US Oil embargo, Japan invades Manchuria, Tripartite Pact signed C. Japan invades Manchuria, US Oil embargo, Tripartite Pact signed D. Tripartite Pact signed, Japan invades Manchuria, US Oil embargo A 42-year-old realtor comes to your clinic, complaining of "growths" in her vulvar area. She is currently undergoing a divorce and is convinced she has a sexually transmitted disease. She denies any vaginal discharge or pain with urination. She has had no fever, malaise, or night sweats. On examination you see a woman who is anxious but appears otherwise healthy. Her blood pressure, pulse, and temperature are unremarkable. On visualization of the perineum you see two 2- to 3-mm, round, yellow nodules on the left labia. On palpation they are nontender and quite firm. What diagnosis best fits this description of her examination? State any two ideas of the philosophers you consider to be the most important for society to function effectively Help me please sssssssssssssssssssssssssssss Bramble Corp. recorded operating data for its shoe division for the year. Sales$1300000 Contribution margin360000 Controllable fixed costs180000 Average total operating assets720000 How much is controllable margin for the year 88 feet/second = 60 miles/hour. How many feet per second is 1 mile/hour? what should a compare and contrast essay not identify? What combination of substances will give a buffered solution that has a pH of 5.05? (Assume each pair of substances is dissolved in 5.0 L of water.) (Kb for NH3 = 1.8 105; Kb for C5H5N = 1.7 109) Select one: a. 1.0 mole NH3 and 1.5 mole NH4Cl b. 1.5 mole NH3 and 1.0 mole NH4Cl c. 1.0 mole C5H5N and 1.5 mole C5H5NHCl d. 1.5 mole C5H5N and 1.0 mole C5H5NHCl e. none of these In a genetics experiment on peas, one sample of offspring contained green peas and yellow peas. Based on those results, estimate the probability of getting an offspring pea that is green. Is the result reasonably close to the value of that was expected? 350 127 3 4 The probability of getting a green pea is approximately . (Type an integer or decimal rounded to three decimal places as needed.) Is this probability reasonably close to ? Choose the correct answer below. 3 4 A. No, it is not reasonably close. B. Yes, it is reasonably close. Input resistance of a FET is very high due to A) forward-biased junctions have high impedance B) gate-source junction is reverse-biased C) drain-source junction is reverse-biased D) none of the above What are cells and how are they important to maintaining life? An object weighs 980N on the earths surface (i) What is its mass? (ii) If the same object weighs 360N on another planet, find the force of gravity on that planet. Which two social changes of the Magna Carta influenced the US Constitution? 1: It made unreasonable searches and seizures of homes and property illegal. 2: It declared that government taxes were unlawful. 3: It gave the right to defend oneself against the government when needed. 4: It limited the power that the government could hold and use. 5: It guaranteed the right to a trial by a jury of peers. Why do rice plants include starch and protein in their seeds when charted on a graph, production possibilities frontiers tend to curve because they show Suppose a certain laser can provide 82 TW of power in 1.1 ns pulses at a wavelength of 0.24 m. How much energy is contained in a single pulse? An investment offers a total return of 12.0 percent over the coming year. Janice Yellen thinks the total real return on this investment will be only 6.0 percent. What does Janice believe the inflation rate will be over the next year? A 4-pole, 3-phase induction motor operates from a supply whose frequency is 60 Hz. calculate: 1- the speed at which the magnetic field of the stator is rotating. 2- the speed of the rotor when the slip is 0.05. 3- the frequency of the rotor currents when the slip is 0.04. 4- the frequency of the rotor currents at standstill. Factor - 3x - 28ax + bxtcIdentify the values that should be written tocomplete the X diagram.On the top:On the bottom:On the sidesRewrite the expression using the numbers on thesides of the X diagram.Use double grouping to factor the four terms.x2 3x 28