Look at the Sankey diagram for a filament light bulb below. If the bulb is used in a desk lamp, what is the efficiency of the bulb?

Look At The Sankey Diagram For A Filament Light Bulb Below. If The Bulb Is Used In A Desk Lamp, What

Answers

Answer 1

Answer:

The question does not state how the answer is to be entered. I would use 10% because that is most common.

Explanation:

You are using 300 J of energy to get 30 J of light energy. The fact that you can account for the left over energy is not relevant.

Efficiency = Work Out / Work In

Efficiency = 30 J / 300 J  = 0.1

If you need this as a %, you can multiply by 100

Efficiency = 0.1 * 100 = 10%


Related Questions

How far has a ball traveled after 3.6 seconds when thrown downward at a
velocity 3.75 m/s?

Answers

ball traveled 13.5 m/s after 3.6 seconds

Explanation:

u=3.75m/s, t=3.6s, g=9.8m/s².

Therefore, according to the formula,

S=ut+½gt².

S=(3.75×3.6)+½×9.8×(3.6)²

S= 13.5+63.504

S= 77.004m (approximately 77 m)

therefore the distance traveled by the ball is 77m.

hope this helps you

Please help I'll mark brainliest

Answers

Answer:A) Oven D) voltage increases, the current decreases

Explanation:

Electromagnetic Equipment

An electromagnet is a type of magnet with a magnetic field produced by an electric current. Electromagnets are often used in electrical devices that induce heat for cooking such as an oven (OPTION A).

Capacitor

As the voltage increases, the current decreases (OPTION D).

As the capacitor charges up, the potential difference across its plates begins to increase, and by extension circuit current decreases.

CAN U PLS CHECK IF IT CORRECT I'LL MARK YOU BRAINLIST

Answers

Answer:

l think that the answer is 10.hope this helps . Can you mark me the brainest pliz.lt's LAURA RAYS AMIRA.

Answer:

Explanation:

700-40 = 760

760/10 = 76

It will take her 76 days to finish the book

how long does it take the star and planet to complete one orbit around their center of mass?

Answers

Answer:

i think about 225-250 million years

Explanation:

Bottom line: The planets in our solar system orbit (revolve) around the sun, and the sun orbits (revolves) around the center of the Milky Way galaxy. We take about 225-250 million years to revolve once around the galaxy's center. This length of time is called a cosmic year.

If you pull on a car with 200N of force, what does Newton’s 3rd Law says will happen?

Answers

When the force of 200N is being exerted, the road the car is being driven on will exert an equal force in the opposite direction on the car.

An Eider duck is flying Northeast at 25 m/s at an angle of 36.9 degrees to the ground (from the positive
X-axis). What are the horizontal and vertical velocities, respectively, of the duck's flight?

Answers

Answer:

Horizontal = 19.99212 m/s     Vertical = 15.0151 m/s

Explanation:

Horizontal = Cos(36.9) x 25

Vertical = Sin(36.9) x 25

what is the use if having a control condition in an investigation​

Answers

Answer:

Thus, including a control condition allows researchers to compare the way things are in the presence of an independent variable with the way things would have been in the absence of an independent variable.

Explanation:

Thus, including a control condition allows researchers to compare the way things are in the presence of an independent variable with the way things would have been in the absence of an independent variable.

what is needed to know in a physics exam?

Answers

Answer:

Review what you have done for that unit. Skim over it if you dont have enough time because it would greatly help. If you have mathamatics involved learn or make sure you are perfect at doing the equations you need to do. Just dont cheat because if you get caught you are going to get an imediete F which will be worse then getting half of them wrong. Good luck

1. a conductor carries a current that is decreasing exponentially with time. the current is modeled as where is the current at time and is the time constant. how much charge flows through the conductor between and ?

Answers

Explanation:

what is the colour of our blood

Answer:

Q = Q0exp -t/RC

Explanation:

Q0 initial chage

RC time constant

t time

The ______ describes the number of wavelengths that pass through a fixed point in a given period.

Answers

Answer:

frequency

Explanation:

Frequency refers to the number of waves that pass a given point in a given time period and is often expressed in terms of hertz (Hz), or cycles per second. Longer wavelengths will have lower frequencies, and shorter wavelengths will have higher frequencies ([link])

Answer: Frequency



Step by step Explanation:

True or False: Parasites use the host's fluids/tissues for nutrients.

Answers

Answer:

true

Explanation:

its true becuse i did this at school today.

Parasites are plants or animals that live in or on another living thing, getting their food from it while it is still alive. The organisms that they live on are called hosts. Hosts never benefit from parasites.

A ball of mass 0.50 kg was thrown directly up at a speed of 6.0m/s.Calculate. A.its kinetic energy at 6ms^-1b.its maximum gain of potential energy. C.its maximum height gain.​

Answers

ヘ(。□°)ヘヘ(。□°)ヘヘ(。□°)ヘヘ(。□°)ヘヘ(。□°)ヘ

A) Its kinetic energy be 9.0 Joule.

B)  Its maximum gain of potential energy is 9.0 Joule.

C) Its maximum gain in height be 1.91 m.

What is speed?

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Given parameters:

Mass of the ball: m = 0.50 kg.

Initial speed of the ball: v = 6.0 m/s.

A) its kinetic energy at initial = 1/2mv² = 1/2 × 0.50 × 6.0² Joule  = 9.0 Joule.

B) As total energy is conserved., when the ball reaches its maximum height its initial kinetic energy fully transforms into potential energy. Its maximum gain of potential energy is  its kinetic energy, that is, 9.0 Joule.

C)  Its maximum gain in height be = √(v²/2g) = √(6.0²/2×9.8) m = 1.91 m.

Learn more about speed here:

https://brainly.com/question/28224010

#SPJ2

inattention hyperactivity and impulsivity are characteristics of

Answers

Answer:

ADHD, also called attention-deficit disorder, is a behavior disorder, usually first diagnosed in childhood, that is characterized by inattention, impulsivity, and, in some cases, hyperactivity.

Explanation:

Please help I'll mark brainliest NO LINKS

Answers

Answer:

D

Explanation:

I had the question on an exam, I answered D and I got 97% on the test, I got it correct with the answer of D. TO be fair I guessed on the test and got it right, lucky guess I suppose.

Answer:

According to electrostatic concept the electric potential will be toward the negative charge and the coulomb force will be directed towards the negative charge.

Due to that 4 is the correct option.

That's what I think, all the best!

INQUIRY LAB
HOW DO You Breathe?
Use and manipulate an improvised breathing apparatus similar to the
one shown at the right in answering the following questions:

Pull down the string attached to the center Of the large balloon.
1.What happened to the two small balloons attached to the capillary tube?
2.When the large balloon is not yet stretched or pulled down, how do the two small balloo
appear?
3.How does the improvised breathing apparatus simulate the breathing process?

plss can u help me with thiss its realy a lot of help THANK YOU SO MUCHH

Answers

Answer:

u breathe lol nice ok bro


A car travels 90m north and 50 m south. What is the total displacement?

Answers

Answer: 40 m

Explanation:

90 - 50 = 40 m

please give me a brainliest answer

Answer is 90m - 50m = 40m

An atom loses an electron. What will happen when it approaches a positively-charged ion?
a
The ions will repel each other.
b
The ions will attract each other.
c
The ions will cancel each other out.
d
The ions will neither attract nor repel each other.

Answers

B. One needs an election it has one less and one wants to get rid of an electron. Atoms always want to be perfectly stable

Describe what happens when there is no Friction and you stop pushing on that object?



Describe what happens when there is Friction and you stop pushing on an object?


Are your answers to questions 1 and 2 the same? Why or why not? What causes that to be the same or different?

I give Brainliest!

Answers

Answer: see below

Explanation:

1) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Friction opposes relative motion. In its absence, a moving object will not stop.

2) If you stop pushing, the force of kinetic friction will produce an acceleration in the opposite direction of the velocity, and the object will slow down and stop.

3) No they are not the same, as one has friction and the other has no friction.

Please help I'll mark brainliest NO LINKS

Answers

Answer:

As a capacitor is charging it takes up charging current and there's significant drop of current as the voltage increases in the capacitor.

Thus, D is the correct option.

2nd qn,

A is the correct option. Since points B, C and D are points of interaction and the force can be experienced at intervals while at A the forces will be balanced.


5 . W h ic h o f th e fo l lo w in g is N O T a fu n d a m e n ta l S .I u n it? A . M e te r B . A m p e re C . K e lv in D . Radian

Answers

Explanation:

it is an AMPERE

because 1 AMPERE = CHARGE / TIME

WHICH INVOLVES 2 UNITS

Which of the following is not part of the forces that work together to move the tectonic plates?

-mantle convection
-ridge push
-slab pull
-friction

Answers

creo que soy yo pero lo veo en ingles

If a truck weighs 195,000N what is the mass of the truck

Answers

Answer:

19500kg

Explanation:

If you divide 195000N by 10

I WILLL MARK YOUUUUUUU HELPPPP

Acceleration due to gravity on the moon is 1.6 m/s2. If a person has a mass of 65 kg on Earth, what is their weight on the moon? 

Answers

Answer:

10.75 kg

Explanation:

moon = (weight on earth/9.81m/s^2)*1.622m/s^2

Answer:

weight of the moon = mass × gravity

= 65kg × 1•6

=104N/kg

If a 2kg block of copper is heated and a temperature increase of 50C is measured, how much energy has been provided?

Answers

Answer:

...................

saya gk tau

What type of forces are needed in a system for the object to move?​

Answers

Answer:

they are

Explanation:

1.Frictional force

2.Applied force

3.Normal force

Velocity:
How far would a bird travel if it is flying south for the winter at 5m/s for 1 week

Answers

Answer:

Birds in migration can travel as far as 16,000 miles. To reach their destination in time, some travel at speeds of 30mph.

the energy stored in chemical bonds *

Answers

Answer:

Chemical energy (Also considered potential energy)

Explanation:

Isaac attempts to kick a field goal from the 40 yard line. He kicks the football at 38 m/s at a 50° angle above horizontal. If the football reaches the goal post at 3/4 of the horizontal distance kicked, then will it be high enough to cross the goal post that is 3.66 m high?
Please help asap!

Answers

Answer: Solution In photo

What is the quantity that is the same for all masses?

Answers

Answer:

mass: The quantity of matter which a body contains, irrespective of its bulk or volume. It is one of four fundamental properties of matter. It is measured in kilograms in the SI system of measurement.

Explanation:

please give brainliest plz follow

Which type of graph would best show the data collected from measuring time for a ball to fall from varying heights?

bar graph

scatter plot

Frequency table

circle graph



This is due tonight, can someone pls help me ASAP, TYSM.

Answers

Scatter plot, because it has a wide rage
Other Questions
A bag contains 6blue marbles 8 green marbles 9 red marbles and 17 yellow marbles what is the ratio of blue marbles to Total marbles plz help me correct answer gets brainiest thank you! The shortcut for the move gizmo isWEnterSpace barM Place the three pieces of bone side by side. Describe their appearance. Do they look different from one another? Explain how skin can be used as a diagnostic tool for doctors or medical professionals how many defensive positions are there in baseball Select more than 1 please How were enslaved people brought to the colonies? what is the sum of the arithmic series 26+29+32+35+38+41+44 th gii ng vt a dng, phong ph do yu t no Why didn't the temperature of the water and aluminum mixture come out halfway between the temperature of the cold water and hot aluminum cubeeven though you mixed equal masses? To which cataract along the Nile did the southern boundary of the Middld Kingdom reach? Which term best describes the relationship between mass and volume of a substance?(3 Points)DensitySolubilitySpecific HeatMelting Point Describe the history of agriculture and its influence on the global economy. 89 ft/sec to m/sec. Round to the appropriate number of significant digits. The solution of a linear equation with rational coefficients is a rational number. A. Always B. Never C. Sometimes other than living with your parents what is another smart way to keep living expenses down while in college describe kevin explaining the difference between cake and pie. (freak the mighty) Describe the end behavior of y = 5x^4 Match these vocabulary words with their definitions.1. a government of tyranny or oppression led by an absolute ruler 2. the most favorable or best 3. to regard with deep respect 1. optimal2. venerate3. despotism