When energy is transferred from one part of a system to another, some of the
energy is lost during the transfer and cannot be used as it was intended.
Which two sentences describe examples of this?
A. An electric motor hums as it powers a conveyor belt
B. Stereo speakers emit sound when powered by electrical energy.
O C. Sunlight strikes a solar panel, generating electricity.
O D. A car engine heats up while the car is being driven.
E. Wind moves a turbine, generating electricity.

Answers

Answer 1

Answer:

A. An electric motor hums as it powers a conveyor belt

D. A car engine heats up while the car is being driven.

Explanation:

Energy inefficiency usually involves loss of energy as other forms when they are being converted from one form to another.

The two choices that fit the description includes;

An electric motor humming as it powers a conveyor belt. This energy conversion is supposed to be from electrical to mechanical energy but there is a loss due to the sound energy produced by the motor. Heat energy produced as the car is driven also results in energy inefficiency.

Other choices do not show this inefficiency.  

Answer 2

Answer:

A. An electric motor hums as it powers a conveyor belt

D. A car engine heats up while the car is being driven.

Explanation:


Related Questions

describing motion with position distance vs time graphs

Answers

Answer:

In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below, then the slope is zero and so is the velocity. The position of the object is not changing.

Explanation:

The speed of a fishing boat is 15 km/hr. How far will the boat travel in 6 hours?

Answers

Answer: 90 Km

Explanation:

15 Km/hr X 6/hr = 90Km

What micro wave used for?

Answers

Answer:

Microwaves are widely used in modern technology, for example in point-to-point communication links, wireless networks, microwave radio relay networks, radar, satellite and spacecraft communication, medical diathermy and cancer treatment, remote sensing, radio astronomy, particle accelerators, spectroscopy, industria.

Explanation:

Which of these warnings refers to a chemical property of the material?

Answers

Answer:

Please show the warning's

Explanation:

The warning refers to the chemical property of the material or object that is flammable.

What is Chemical Property?

A chemical property is a feature that pertains to how a component, such as an ingredient or a compound, can alter as a result of a reaction. Due to bonding and other atomic structural characteristics, a substance develops these qualities as a result of its chemical identity.

Tactile or visual changes may occur in conjunction with chemical qualities. Chemical reactions commonly involve popping, fizzing, or the release of brilliant light. The emission of heat may also be a sign of a chemical reaction or chemical conversion that is taking place. Because the connections in the atomic structure are changing or breaking, these sensory clues appear.

Therefore, the warning refers to a chemical property of the material is flammable or combustible.

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Determine how far a vehicle moved if it started at 12 m/s and accelerated up to 47 m/s in a time of 34s. ​

Answers

Answer:

[tex] s = 1,003 \: m[/tex]

Explanation:

[tex]s = \frac{1}{2} (u + v)t = \frac{1}{2} (12 + 47)34 \\ s = 1,003 \: m[/tex]

How many times larger is the mass of a proton compared to the mass of an electron?

Answers

Answer:

1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.

URGENT WILL GIVE BRAINLIEST TO BEST ANSWER
In a windy day,
(pick one)
high and low pressure are the same
low pressure is greater than high
air temperature is greater than the air pressure
high pressure is greater than low pressure
high pressure is less than low pressure
low pressure is less than high pressure

Answers

Answer:

D, high pressure is less than low pressure low pressure is less than high pressure

Explanation:

Answer:

a

Explanation:

Two football players have a head-on collision and grab onto each other's uniforms. The 80
kg Pennridge Ram was moving at 3 m/s, while the 70 kg Souderton player was moving in
the opposite direction at 2.5 m/s. What is their final velocity after impact?

Answers

You need to calculate the momentum of each. 80x3 = 240 Kg m/s and 70x2.5 = 175 kg m/s

A wave has a speed of 23 m/s and a frequency of 13 Hz. What is the wavelength?

Answers

Answer:

1.76923077 meters

Explanation:

wavelength is denoted by the letter lambda it is equal to the speed (v) of a wave in a medium (air , water, light) divided by frequency , equals wavelength . so wavelength = v/f or = 23m/s ÷13hz

Two trains are on separate but parallel tracks running east and west. One has a speed of 90 km/h, the other 80 km/h. Initially, the trains are 5 km apart and are approaching each other. How long will it take the two trains to have the same position along the east-west direction?

Answers

Answer: 4 hours

Explanation: Their approach rate is 100+140 or 240 km/h and 960/240 which equals 4 hours

if 270 watts of power is used in 42 seconds, how much work was done

Answers

Answer: W = 11340J

Explanation:

Hey there! I will give the following steps, if you have any questions feel free to ask me in the comments below.

So this is the Formula: Power = Work / Time.

Step 1: Find the Formula

P = W / T

Step 2: Make W the subject of the equation.

W = PT

Step 3: Given.

P = 270 Watts, T = 42 seconds

Step 4: Substitute these values into equation 2 .

W = 270(42)

Step 5: Simplify.

W = 11340J

The amount of work done was 11340.

~I hope I helped you! :)~

Answer:

W = 11340J

Explanation:

Which of the following is a characteristic of electromagnetic waves?
A: they are all visible
B: they have a purely particle nature
C: they can travel with or without a medium
D: they cannot travel very fast

Answers

It is C-cannot travel very fast

Convert 360 ns to Ms

Answers

Answer:

the answer is ms no soubtrack360 degree

Explanation:

as if we combine ms with the ful form of ns(no soundtrack) we get ms no soundtrack and a 360 which is 360 degree

Which of these consumers is an herbivore? *

1. lion

2. deer

3. spider

4. snake

Answers

Answer:

2. deer

Explanation:

The lion, spider, and snake eat meat or to an extent.

Deer don't eat meat

Answer:

deer :)

Explanation:

The rest are basically carnivores

How to calculate weight on
mars?

Answers

it takes the weight of an object on earth and converts it to Martian weight, the formula is Weight on Mars= (Weight on Earth/9.81m/s2) * 3.711m/s2. To find the Martian weight, we divide the weight on earth by the earth's force of gravity, which is 9.81m/s2. This calculates the mass of the object. Once we have the object's mass, we can find the weight by multiplying it by the gravitational force, which it is subject to. Being that Mars has a gravitational force of 3.711m/s2, we multiply the object's mass by this quanitity to calculate an object's weight on mars.

So an object or person on Mars would weigh 37.83% its weight on earth. Therefore, a person would be much lighter on mars. Conversely, a person is 62.17% heavier on earth than on Mars.

Question 12 (1 point)
[04.01)
What must happen for liquid water to become water vapor? (1 point)
a
Ob
The water molecules must lose energy and stop moving.
The water molecules must exert less pressure on their container.
The water molecules must gain kinetic energy
The water molecules must lose heat and gain volume.
С
Od

Answers

Answer:

C

Explanation:

help i need step by step awnser​

Answers

Answer:

Gold

Silver

Mixture

Explanation:

Density

The density of an object of mass m and volume V is given by:

[tex]\displaystyle d=\frac{m}{V}[/tex]

We are given the following densities:

Gold: 19.3 gr/cm3

Silver: 10.5 gr/cm3

With the data provided in the table, we can confirm which of the three columns corresponds to gold, silver, or a mix of both.

Calculating the first density: m1=1,930 gr, V1=100 cm3

[tex]\displaystyle d1=\frac{m1}{V1}[/tex]

[tex]\displaystyle d1=\frac{1,930}{100}[/tex]

[tex]d1=19.3\ gr/cm^3[/tex]

This crown is made of gold

Calculating the second density: m2=1,930 gr, V2=184 cm3

[tex]\displaystyle d2=\frac{m2}{V2}[/tex]

[tex]\displaystyle d2=\frac{1,930}{184}[/tex]

[tex]d2\approx 10.5\ gr/cm3[/tex]

This crown is made of silver

Calculating the last density: m3=1,930 gr, V3=150 cm3

[tex]\displaystyle d3=\frac{m3}{V3}[/tex]

[tex]\displaystyle d3=\frac{1,930}{150}[/tex]

[tex]d3\approx 12.9 gr/cm^3[/tex]

Since the value of the density is between gold and silver, this crown is a mixture.

find the difference between the actual values of the two sixes in the number 6036​

Answers

6000 - 6 = 5994 is the difference in their values

If the number of wavelengths that pass a point in a given time increases, what has increased?

A.frequency

B.amplitude

C.intensity

D.wavelength

Answers

A /////////////////////////////
A:))))))))))) ;))))))

Explain the quantization of energy.​

Answers

Answer:

The quantization of energy refers to the fact that at subatomic levels, energy is best thought of as occurring in discreet "packets" called photons. Like paper money, photons come in different denominations. ... Each photon contains a unique amount of discreet energy

1. Given a list of atomic model descriptions:
A: electron shells outside a central nucleus
B: hard, indivisible sphere
C: mostly empty space
Which list of atomic model descriptions represents
the order of historical development from the earliest
to most recent?
A) A, B, CBA, C, B
CB, C, A D) B, A, C

Answers

Answer: A: electron shells outside a central nucleus

B: hard, indivisible sphere

C: mostly empty space

Which list of atomic model descriptions represents

the order of historical development from the earliest

to most recent?

Explanation:

3

Atomic models have been proposed throughout history describing the possible arrangements of different particles inside the atoms.

The very first model for atom was given by Dalton known as the solid sphere model that was an indivisible hard sphere.The model given by Rutherford that was known as nuclear model  mostly included empty space.The model given by Shrodinger showed electron shells as being outside the central nucleus.

Thus, the correct order of atom model is B C A. Hence, the correct answer is option C.

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Question 5
The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The
head of a hammer must be strong to resist what force?

Answers

Answer:

the nails

Explanation:

The force of the nail pushing in the opposite direction. The correct option is option D among all the given options.

What is force?

A force in physics is an effect that changes the velocity of a mass-moving object, causing it to accelerate from rest, for example. It is a vector quantity since it can be a push or even a pull and always has magnitude and direction.

The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist the force of the nail pushing in the opposite direction.

Therefore,  the force of the nail pushing in the opposite direction. The correct option is option D.

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Your question is incomplete but most probably your full question was,  

The head of a hammer is often made of steel. This makes the head heavy, which helps create a strong force for driving nails. Steel is also strong. The head of a hammer must be strong to resist what force?

A The force of the air resistance on the moving hammer

B The force of the person using the hammer

C The force of gravity pulling down on the hammer

D The force of the nail pushing in the opposite direction

Select the correct answer.
Which statement is true?
Ο Α. .
The speed of sound in air is inversely proportional to the temperature of the air.
OB.
The speed of sound in air is directly proportional to the temperature of the air.
The speed of sound in air is twice the temperature of the air.
OD
The speed of sound in air is not affected by the temperature of the air.

Answers

Let me think I think it’s B
I'm sure the correct answer is B.

13. Which of the following would have NO momentum?
A person running
A table
A moving bus

Answers

Answer:

a table

Explanation:

Why do humans still think there is a god even though science has proven them wrong every time?

Answers

Answer: everyone has a religious belief

Explanation:

You have a belief as well called Scientology

You believe science is more powerful then religion

They also need it as an excuse to think there is somewhere to go when you die so they make the good place heaven and hell

Answer:

people need to believe that there is a higher power guiding them. to explain events that they don't understand. that there is a reason for their existence. people need something to believe in. and you can't say someone's belief is wrong just because you don't agree with it or share that same belief.  

Explanation:

Lili 57 seconds to walk from Clash of Clan library at the distance between the classroom in library 30am at whatever speed did Lily walk in m/min __m/min​

Answers

Answer:

7mph

Explanation:

What is a chemical reaction

Answers

Answer:

a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

Explanation:

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Find by means of a vector (quantity) diagram,
the resultant of two forces of 7N and 3N acting at
right angle to one another
solve ​

Answers

Answer:

which principle prevents a brach from abusing  its power

Explanation:

When you are standing in a subway train and the train suddenly stops but your body continues to move forward. Which one of Newton's laws is this?
1st law
2nd law
3rd law
4th law

Answers

Answer:

A. 1st law.

Explanation:

Newton's first law of motion states that, an object or body will continue to be at rest or experience a uniform motion in a straight line at constant speed provided there's no action of an external force. Thus, unless compelled to change its state by an external force, a body will continue to be at rest or experience a uniform motion in a straight line.

The Newton's first law of motion is also known as the law of inertia; which is the tendency of a body to be at rest unless acted upon by an external force.

In this scenario, you are standing in a subway train and the train suddenly stops but your body continues to move forward. This is in accordance with Newton's first law of motion.

Hence, the sudden stoppage of the train generates a force which acts on the body thereby causing the passenger to tip or move forward.

3. Let the pen return to its vertical position and suddenly pull the thread.
Q4. What happened to the thread tied on the pen?

Answers

Answer:

The thread will experience a force on it .

Explanation:

When thread is tied to pen it will experience force. Because the pen is Abit heavy , there is a force that is applied to it which will cause it to elongate , after a while the thread will stretch, elongate and can later experience deformation. When it experience that, the thread can break after deformation and it has losses it elasticity.

Other Questions
Peter says there are two distances for which he and Maria charge the same amount. To prove Peter is not correct, Maria graphs a line for her delivery charges and a line for Peters delivery charges. Each line represents the relationship between the amount (y), in dollars, each person charges for a delivery and the distance (x), in miles, each drives for the delivery. Without showing the graph, explain how Marias graph of the two lines proves Peter is not correct. An aluminium atom has a mass number of 27 and a proton number of 13. How many neutrons does this aluminium atom contain? Combat Fire, Inc. manufactures steel cylinders and nozzles for two models of fire extinguishers: (1) a home fire extinguisher and (2) a commercial fire extinguisher. The home model is a high-volume (54,000 units), half-gallon cylinder that holds 2 1/2 pounds of multi-purpose dry chemical at 480 PSI. The commercial model is a low-volume (10,200 units), two-gallon cylinder that holds 10 pounds of multi-purpose dry chemical at 390 PSI. Both products require 1.5 hours of direct labor for completion. Therefore, total annual direct labor hours are 96,300 or [1.5 hours (54,000 + 10,200)]. Expected annual manufacturing overhead is $1,570,706. Thus, the predetermined overhead rate is $16.31 or ($1,570,706 96,300) per direct labor hour. The direct materials cost per unit is $18.50 for the home model and $26.50 for the commercial model. The direct labor cost is $19 per unit for both the home and the commercial models.The companys managers identified six activity cost pools and related cost drivers and accumulated overhead by cost pool as follows. Expected Use of Drivers by ProductActivity Cost Estimated Expected Use ofCost Pools Drivers Overhead Cost Drivers Home CommercialReceiving Pounds $87,100 335,000 215,000 120,000Forming Machine hours 157,500 35,000 27,000 8,000Assembling Number of parts 390,600 217,000 165,000 52,000Testing Number of tests 61,200 25,500 15,500 10,000Painting Gallons 36,806 5,258 3,680 1,578Packing and Pounds 837,500 335,000 215,000 120,000shipping $1,570,7061.) Under traditional product costing, compute the total unit cost of each product. (Round answers to 2 decimal places, e.g. 12.25.)2.) Under ABC, complete the schedule showing the computations of the activity-based overhead rates (per cost driver). (Round your answers to 2 decimal places, e.g. 2.25.)3.) Complete the schedule assigning each activity's overhead cost pool to each product based on the use of cost drivers. (Use rates from part b above and round cost assigned to 0 decimal places, e.g. 12,250. Round overhead per unit to 2 decimal places, e.g. 2.25. Note that due to rounding your total cost assigned will be slightly different than calculated above.)Cost Driver Home ModelCommercial ModelCost Assigned4.) Compute the total cost per unit for each product under ABC. (Round your answers to 2 decimal places, e.g. 12.25.)Home Model $Commercial Model $5.)Classify each of the activities as a value-added activity or a non-value-added activity.ActivityReceiving value-addednon-value-addedForming non-value-addedvalue-addedAssembling value-addednon-value-addedTesting value-addednon-value-addedPainting non-value-addedvalue-addedPacking and shipping value-addednon-value-added Dave earned $12 for mowing 4 lawns. What is the rate earned per lawn mowed? Ashleigh hires a group of security staff. Each worker works an average of 80 hours per month at $14/hour. If her monthly labor cost for security workers is $23,520, how many security workers did Ashleigh hire? a) 15 b) 21 c) 36 d) 47 4 less than a number g equals 9Answer fast I will name you the most Brainly please help This question. Help. HELP Which of the following was not a consequence of the Industrial Revolution?(K12 Answers plz) The story is GideonCheck the boxes that describe the setting of the story.wine pressaltar of Baalwheat fieldsEphraimfarm in OphrahManasseh 10x-6y=-48 standard to slope intercept form in the Jewish 10 commandments, what is the significance of graven images Listen and choose the option that best answers the question.Select the best summary of the advice about safe driving that Paulina follows. Follow the speed limit. Text when at stop signs. Use hands-free phones. Respect traffic signs. Music slowing down is called what?A. ritardandoB. accelerandoC. crescendoD. piano What is an active site? A )a gland that secretes a particular enzymeB) a part of an enzyme molecule into which a substrate molecules fitsC)a part of the substrate to which an enzyme molecule attachesD)a place in the body where an enzyme works what is 0.345 in standard form PLEASE HELP ASAP!! IF YOU CAN please help me fix this sentence! there's 5 mistakes In 1957. tennis player Althena Gibson won the womans championship at Wimbledon later that year, she became the 1st African American woman to win the us open. (5) Letter: 8.5 inches by 11 inches Legal: 8.5 inches by 14 inches Junior legal: 5 inches by 8 inches Tabloid: 11 inches by 17 inches a. Are any of the paper sizes similar? b. The dimensions of government-letter paper are each 0.5 inch less than the dimensions of letter paper. Are these paper sizes similar? Question 2 c. By increasing the shorter side of legal paper by inch, it is similar to the size of junior legal paper. Why does the surgeon draw on the patient before surgery? 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