Why is a device never 100% efficient? *


a) Mechanical Advantage

b) Work

c) Friction

d) Speed Ratio


brainliest for best answer, asap plz
for science lovers!!

Answers

Answer 1
I think it’s c, friction
I’m not sure tho

Related Questions

Come up with an example of classical conditioning in your own life or in the real world. Be sure to identify the unconditioned stimulus, unconditioned response, conditioned stimulus, and conditioned response. Also explain, in this example, how extinction would occur.

Answers

Answer:   All learning occurs through interactions with the environment; The environment ... In the before conditioning phase, an unconditioned stimulus is paired with an ... In our example, the conditioned response would be feeling hungry when you heard ... reinforce the salivation response to make sure the behavior is well learned.

Which diagram is the best model for a solid ?

Answers

The answer is substance A

How do you represent an object in a free body diagram?

A)An object is represented in a free-body diagram by an arrow and tail.

B)An object is represented in a free-body diagram by a box with a dot in
the middle, indicating its center of mass.

C)An object is represented in a free-body diagram by a word that says object.

D)An object is represented in a free-body diagram by having the mass labeled.
Clear answer

Answers

Answer: the answer is D

Explanation:

which of the following is equal to an impulse of 9 units​

Answers

Answer:

force=2,time=4.5

Explanation:

Thats the answer

What do we call the quantity force multiplied by distance

Answers

Answer:

When the force is multiplied by the time of its application, we call the quantity impulse, which changes the momentum of that object.

Explanation:

Answer:The quantity force multiplied by distance is called work

Explanation:This is because work is the measure of energy in applying force over a certain distance.

Which of the answers shows three examples of a physical change

Answers

B would be the correct answer. All the other choices consist of physical changes

a bicycle coasts along a flat road. what form of energy does it best demonstrate ​

Answers

Answer:

Kinetic energy

hope this helps:))

There is a large box and a small box on a table. The same force is applied to both boxes. The large box moves two feet and the small box moves one foot. Which movement shows the most work done? The movement of the large box shows more work because the box moved a longer distance. The work done is equal because the same force was applied to both boxes. The movement of the small box shows more work because the box moved a shorter distance. The work done was equal because both boxes moved in the same direction as the force.

Answers

Answer:

The movement of the large box shows more work because the box moved a longer distance.

Explanation:

The way a rock reflects light is called the rock's
A. streak
O B. luster
O C. cleavage
D. specific gravity

Answers

Answer is luster b Because luster defines light or illumination

The way a rock reflects light is called the luster of the rock. Hence option B is the correct answer.

What is Reflection?

When light rays bounce off one surface, transition from one transparent medium to the next, or proceed through a media whose structure is constantly shifting, they change direction.

According to the law of reflection, the angle of the reflected ray when reflecting from a level surface is the same as the angle of the ray. (By practice, all angles in wave propagation are expressed with regards to the normal to the surface, or to the line that is perpendicular to it.

The light beam and the surface normally establish a plane in which the reflected beam is always located. The pictures created by straight and curved mirrors can be understood using the

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I WILL CHOOSE YOU AS THE BRAINIEST PLEASE ANSWER MY QUESTION
Identify that all objects exert a force of gravity on all other objects in the universe

Answers

Answer:

It's like the Earth pulling on you and keeping you on the ground. That pull is gravity at work. Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects.

Explanation:

Ax = 44.4 m and Ay = 25.1 m Find the direction of the vector.

Answers

Answer: 29.5 degree

Explanation: Given that

Ax = 44.4 m and Ay = 25.1 m 

The direction of the vector will be

Tan Ø = Ay/Ax

Substitute Ay and Ax into the formula

Tan Ø = 25.1/44.4

Tan Ø = 0.5653

Ø = tan^-1(0.5653153)

Ø = 29.48 degree

Ø = 29.5 degree approximately.

Therefore, the direction of the vector is 29.4 degrees approximately.

How does a force do negative work on an object

Answers

Answer:

Explanation:  

How does a force do negative work on an object ; This is when the direction of motion is opposite to the direction of the force

To solve this we must be knowing each and every concept related to work. Therefore, a force do negative work on an object,  when the direction of motion is opposite to the direction of the force.

What is work?

A task requiring mentally or physically effort in order to accomplish a goal or outcome is referred to as labor in general. When we lift heavy objects off the ground or push or pull large objects, we are performing labor. When the direction of motion is opposite to the direction of the force, work is negative.

Another word we frequently use is energy. Energy and amount of work performed are typically associated, because a person who's really feeling particularly excited is capable of accomplishing a lot of work.

Therefore, a force do negative work on an object,  when the direction of motion is opposite to the direction of the force.

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10. Almost three-quarters of household energy use is due to the following:

• home furnaces and air conditioners

• water heaters

• washers and dryers
• lighting

For each of these uses of energy, give two reasonable ways to reduce household
energy consumption

Answers

Answer: Energy consumption and sustainability is important so that it remain available for future generation.

Explanation:

1. The home furnaces are likely to require fuel like coal, which will directly emit carbon dioxide and carbon monoxide gases. These should be replaced with the electrical furnaces. The old or more power consuming air conditioners should be replaced with new ones.

2. The water heaters should be tankless so their capacity to heat more water could be possible. The water heaters should be electricity saving.

3. Washer and dryers should be water savy and electricity savy. A front-loading washing machine is useful energy saver.

4. The LED lights are more electricity saving than conventional bulbs. Halogen lights are also electricity saving.

For a reaction to occur what must happen to the energy in order to break the chemical bond

Answers

Energy needs to realease

What does Ohm’s law state?
A. Current equal voltage time resistance
B. Voltage equals resistance divided by current
C. Voltage equals current divided by resistance
D. Voltage equals current time resistance

Answers

Answer:

The answer is D

Explanation:

Giotto used foreshortening in order to:
O A. enhance the importance of his subjects.
O B. make his figures look more realistic.
O C. combine linear and aerial perspectives.
O D. guide the eye of the viewer.
SUBMIT

Answers

Answer:

I think B is the answer.

If you have two waves, one with a frequency of 4.4 x 1010 Hz and one with a frequency of 3.6 x 1014 Hz, which has the highest energy? Justify your answer
with evidence from the lesson and/or mathematically.

Answers

Answer: frequency of 3.6 x 10^14 Hz

Explanation:

If someone have two waves, one with a frequency of 4.4 x 1010 Hz and one with a frequency of 3.6 x 1014 Hz, the one with higher frequency ( 3.6 × 10^14) will have the higher energy.

From electromagnetic spectrum,

E = hf

Where

E = energy

F = frequency

h = Planck constant

The one with higher frequency will have the higher energy since energy is directly proportional to the frequency.

The one with higher frequency ( 3.6 × 10^14) will have the highest energy.

What is the frequency?

Frequency is the number of oscillations per second in the sinusoidal wave.

If someone have two waves, one with a frequency of 4.4 x 10¹⁰ Hz and one with a frequency of 3.6 x 10¹⁴ Hz.

From electromagnetic spectrum, energy associated with the frequency is

E = hf

Where, E = energy, f = frequency and h = Planck constant

The Planck's constant is the constant value. The energy is directly proportional to the frequency.

Thus, The one with higher frequency will have the higher energy since energy is directly proportional to the frequency.

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what type of circuit is shown?
open parallel circuit
closed parallel circuit
closed series circuit
open series circuit​

Answers

Open circuit ......fiend do

Answer:

open series circuit, (c)

Explanation:

A model of an atom is useful when it
Select one:
O a. is shown only as the planetary model
b. shows exactly what an atom looks like
c. helps to visualize processes that cannot be seen with our eyes
d. magnifies what the eye can't see

Answers

the correct answer is letter C
Answer: C. Helps to visualize processes that cannot be seen with our eyes

A vector points 12.0 units along the x-axis, and 9.00 units along the y-axis. Find the direction of the vector

Answers

The resultant points somewhere between the positive x and y axes.

The angle it makes with the x-axis has a tangent of (9/12) = 0.75 .

That angle is 36.9°, rounded to the nearest tenth of a degree.

So the resultant vector points up and to the right, 36.9° above the x-axis.

What are two ways to increase impulse?

Answers

Answer:

increase the time the force acts or you could increase the number of temptations.

hope this helped!

Which of the following planets helped astronomers locate another planet?

Group of answer choices


Mercury


Uranus


Saturn

Pluto

Answers

Answer: Pluto,Mercury

Explanation:

Which statement is true according to Newton's second law of motion?
OA
An object accelerates in the direction opposite to the direction of the force applied.
ОВ.
An object accelerates in the direction perpendicular to the direction of the force applied.
Ос. An object accelerates in the same direction as that of the force applied.
OD An object undergoes no acceleration on the application of force.
O E. An object's acceleration is independent to the force applied.

Answers

Answer: I think is OA.

Refer:

Newton's second law of motion states that the acceleration of a system is directly proportional to and in the same direction as the net external force acting on the system, and inversely proportional to its mass. In equation form, Newton's second law of motion is a=Fnetm a = F net m .

How do you inhibitors work

Answers

Answer:

By binding to enzymes' active sites, inhibitors reduce the compatibility of substrate and enzyme and this leads to the inhibition of Enzyme-Substrate complexes' formation, preventing the catalyzation of reactions and decreasing (at times to zero) the amount of product produced by a reaction.

Explanation:

What is the mass of a 600 gram object on the moon

Answers

The object’s mass will be 600 grams on the moon. If you meant it’s weight, it will be 1/6 that of on Earth while on the moon.
It is 1/6 times that on the moon.

PLEASE HELP THIS IS MY LAST QUESTION!!! HELP ASAP!!
Which of these does NOT have gravity?
A. heat
B. an apple
C. a small moon
D. Earth's atmosphere

Answers

Answer: its A

Explanation: it cant be earths atmosphere because is it was we would be flouting

Answer:

a

Explanation:


A ball is thrown vertically downward with an initial speed of 12.0 m/s from a height of 10.0 m above the ground. Ignoring air resistance, what is the speed of the ball when it reaches the ground?
(A) 18.5 m/s
(B) 14.6 m/s
(C) 14.0 m/s
(D) 12.8 m/s
(E) 12.0 m/s
Can you just take a picture of your work clearly because I have to show work. Thanks.

Answers

Answer:

18.5 m/s

Explanation:

Take down to be positive.

Given:

Δy = 10.0 m

v₀ = 12.0 m/s

a = 9.8 m/s²

Find: v

v² = v₀² + 2aΔy

v² = (12.0 m/s)² + 2 (10 m/s²) (10.0 m)

v = 18.5 m/s

What happens to sound waves after they are received by our ears?

Answers

Answer:

Our ears perceive then sound then it is transmitted to our brain where it is processed into something we can respond to. This all happens in less than a second and we are unaware that we are doing it.  

Explanation:

The sound wave bounces off of the ear drum into the inner ear.

Answer:

Sound waves travel from the outer ear and in through the auditory canal, causing the eardrum to vibrate. This in turn causes three small bones in the middle ear to move. The vibrations move through the fluid in the cochlea in the inner ear, stimulating thousands of tiny hair cells.

A blow dryer transfers thermal energy mainly by
A. conduction
B. convection
C. radiation
D. specific heat

Answers

Answer:

B

Explanation:

Through air

Answer:

thermal conduction I assume

Explanation:

why because the thermal Insulator: a material that conducts thermal energy poorly. Gives off heat

The process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions is called __________.
A. empiricism
B. deductive reasoning
C. scientific method
D. inductive reasoning

Answers

Answer:

Deductive reasoning

Explanation:

deductive reasoning

the process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions about it

Other Questions
Read the quotation by Marcus Garvey. The only wise thing for us as ambitious Negroes to do, is tobuild up for the race a mighty nation of our own in Africa. And this race of ours that cannot get recognition and respect in the country where we were slaves, by using our own ability, power and genius, would develop for ourselves in another country in our habitat a nation of our own. Based on the quotation, which best describes Garveys view on the best way for African Americans to gain respect and recognition? to form their own communities in the US to take pride in their American heritage to use their ability, power, and genius to fight for equality in the US to return to Africa and form a new country I NEAD HELP ASAP The Lewis family dined at a restaurant. Their bill came to $52, and they plan on leaving a 19% gratuity. This means that the total amount they will pay is 119% of the bill. Which calculation results in the best estimate of the total amount they will pay in dollars? Assume there is no tax. (50) (110 percent) = (50) (100 percent + 10 percent) = (50) (100 percent) + (50) (10 percent) = (50) (1.0) + (50) (0.1) = 50 + 5 = 55 (50) (120 percent) = (50) (100 percent + 20 percent) = (50) (100 percent) + (50) (20 percent) = (50) (1.0) + (50) (0.2) = 50 + 10 = 60 (60) (110 percent) = (60) (100 percent + 10 percent) = (60) (100 percent) + (60) (10 percent) = (60) (1.0) + (60) (0.1) = 60 + 6 = 66 (60) (120 percent) = (60) (100 percent + 20 percent) = (60) (100 percent) + (60) (20 percent) = (60) (1.0) + (60) (0.2) = 60 + 12 = 72 The City of Mecca is similar to what City-State of the Fertile Crescent. Explain A solid sphere has a temperature of 556 K. The sphere is melted down and recast into a cube that has the same emissivity and emits the same radiant power as the sphere. What is the cube's temperature in kelvins When an impaired driver's field of view brightens, he or she mayA. adapt to the change faster than other driversB. see only blackC. be temporarily blindedD. None of the above Why might violence be tempting to activists? Why might it be risky to their movements? Pls help me its emergency plzz fast Which of the following statements describes non-communicable diseases? A. They are often long-term diseases B. They are not contagious diseases C. Examples include arthritis, cancer, and diabetes D. All of the above Andy's savings account pays 0.3% more interest than Marty's. What is 0.3% written as a decimal number? A.0.003B.0.3C.0.0003D.0.03 A jar contains 5 red, 4 blue, and 3 yellow marbles. What is the probability of pulling a red marble, then pulling a blue marble, withoutreplacement? Calculate to the nearest tenth.O 15.2 %O 13.9%14%O 17.1% In addition to compiling the list of user access requirements, applications, and systems, the BIA also includes processes that are ____________. These processes safeguard against any risks that might occur due to key staff being unavailable or distracted. A newspaper conducted a survey to find out how many high school students play video games. The two-way table below displays the data from the survey. Based on these data in the table, which statement is true? *A. There were 2,451 boys surveyed, and about 29% of them play video games.B. There were 2,996 girls surveyed, and about 45% of them play video games.C. There were 5,447 students surveyed, and about 54% of them do not play video games.D. There were 2,493 students surveyed, and about 34% of them are girls who do not play video games. The market for plywood is characterized by the following demand and supply equations: QD = 800 10P and QS = 50P 1,000, where P is the price per sheet of plywood and Q measures the quantity of plywood. What is the size of the deadweight loss if the government imposes a price ceiling of $25 per sheet of plywood? 12.0 V car battery has a voltage drop of 3.4 V when the starter draws 93 A of current. What is the resistance of the starter? O 88 m2 84 mg O 80 m2 Select the correct answer.Extreme jealousy and anger areexpressions of love.A.TrueB.False Please help me with 3 more questions ill give good ratings please! Please Help !Find The Length Of AC .Express Your Answer In Terms Of Pi . One car travels 40. meters due east in 5.0 seconds, and a second car travels 64 meters due west in 8.0 seconds. During their periods of travel, the cars definitely had the same Choose the true statement. Receptor tyrosine kinases undergo autophosphorylation. G proteins phosphorylate receptor tyrosine kinases. Receptor tyrosine kinases include seven transmembrane segments. Active receptor tyrosine kinases are monomeric proteins. Why did Japan and the United States begin diplomatic negotiations in March 1941? Werethey successful? Explain