a student does 100 j of work on the handle of a bicycle pump. the pump does 40 j of work pushing the air into the tire. what is the efficiency of the pump? show your work.

Answers

Answer 1

Answer:

40%

Explanation:

Student -> Pump = 100j

Pump -> Tire = 40j

Between the two, 60j of energy were lost.

Efficiency = 40/100 = 40%

Answer 2
30g y y y tvtt t tccycfciughjjji

Related Questions

How do atoms of different non metals stabilize themselves?
Pls help

Answers

Answer:

by taking other atoms that have one shell and putting it i the spot that they need t in

Explanation:

Light travels in a transparent material at 2.5 x 10 m/s. Find the index of refraction of the
material.

Answers

I would say 5.6 to the 4 and I’ll I did was add it to both side

We have that for the Question "Light travels in a transparent material at 2.5 x 10 m/s. Find the index of refraction of the material." it can be said that

From the question we are told

Light travels in a transparent material at 2.5 x 10 m/s. Find the index of refraction of the  material.

Generally the equation for the  index of refraction  is mathematically given as

[tex]n=\frac{C}{v}\\\\Therefore\\\\n=\frac{3*10^8}{2.5 * 10 }\\\\n=12000000\\\\[/tex]

Therefore

The  index of refraction  of the material is

n=12000000

For more information on this visit

https://brainly.com/question/23379286

name the metal which form the filament of an electric bulb. what is the function of contact wire in bulb.​

Answers

Incandescent light bulbs consist of an air-tight glass enclosure (the envelope, or bulb) with a filament of tungsten wire inside the bulb, through which an electric current is passed. Contact wires and a base with two (or more) conductors provide electrical connections to the filament.

Answer:

tungsten wire

Incandescent light bulbs consist of an air-tight glass enclosure (the envelope, or bulb) with a filament of tungsten wire inside the bulb, through which an electric current is passed. Contact wires and a base with two (or more) conductors provide electrical connections to the filament.

Which surface applied the greatest force of friction on the object?

Answers

Answer:

Which surface applied the greatest force of friction on the object?

Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force.

I hope you helped>_<

Follow me for more answers

Which device converts chemical energy directly into electrical energy?




A.

A battery


B.

A generator


C.

A light bulb


D.

A motor

Answers

Answer:

A

Explanation:

Name me brainliest plzzzzz

A battery has it's energy stored in form of chemical energy which is active in it's materials, and can be converted into electric energy on demand . electrical energy then flows in form of a current in circuits. The correct answer is A battery.

please help me quickly

Answers

Answer:

not moving

Explanation:

Could you pick up a nail using the curved part of the horseshoe magnet farthest from the poles?

Answers

Answer & Explanation:

One can pick up a nail using the curved part of the horseshoe magnet farthest from the poles. A horse shoe magnet has magnetic fields all around it. In the presence of magnetic force fields, any magnetic object will be attracted to it.

One can pick up a nail using the curved part of the horseshoe magnet farthest from the poles.

What is magnet?

A substance which is negative charged at one end and positive charged at another end creating the magnetic field around it.

A nail is a magnet which can attract the particle which are charged.

A horse shoe magnet also has magnetic fields around it. In the presence of magnetic force fields, any magnetic object will be attracted to it.

Thus. one could pick up a nail using the curved part of the horseshoe magnet farthest from the poles.

Learn more about magnet.

https://brainly.com/question/2841288

#SPJ2

You see I am having issues with my Cart and think a thunder strike has burnt all my spark plugs and a banana has gotten stuck some where

Answers

Answer:

umm??????? i dont understand

Explanation:

Can someone tell me how we got this answer please like what rule should I use?

Answers

Answer:

W = V Q          energy = work / charge * charge

Q = I t            charge = current * time

V = W / (I * t)

V = 3 * 10E8 J / (1.5 * 10E4 amps * 2 * 10E-4 sec)

V = 10^8 volts

A rocket, initially at rest on the ground, accelerates straight upward from rest with constant (net) acceleration 53.9 m/s2 . The acceleration period lasts for time 6.00 s until the fuel is exhausted. After that, the rocket is in free fall.

Find the maximum height ymax reached by the rocket. Ignore air resistance and assume a constant free-fall acceleration equal to 9.80 m/s2 .

Answers

Answer:

maximum height reach by rockect =970.2metre

Explanation:

The output of a solar panel powers a small pump. The pump operates a garden water fountain. The output of the solar panel is 10 V and the current supplied to the pump is 0.25 A. Calculate the electrical power generated by the solar panel.

Answers

That’s tuff ima get in give me a min

The power generated by solar panel will be "2.7 W".

According to the question,

The values are:

Output of solar panel,

10 V

Current,

0.25 A

The electrical power generated will be:

→ [tex]P = VI[/tex]

By substituting the given values is the above formula, we get

→     [tex]= 10\times 0.27[/tex]

→     [tex]=2.7 \ W[/tex]

Thus the above answer is right.

Learn more about power here:

https://brainly.com/question/16642746

If you are in a car at a stop sign and then the driver
presses on the gas pedal really hard, which way is the car
accelerating?

Answers

Answer:

it wont be because the hand brake would be on

The car is accelerating forward.

Which form of energy does Theodore Roosevelt Lake have as the water collects in the
reservoir behind the dam?

A.heat
B.mechanical kinetic
C.mechanical potential
D.solar

Explain why

Answers

c. because the energy is potential

Stefan has to drive 8 miles south and 3 miles east to get to work. Find his distance and displacement.

Answers

Stefan's distance and displacement are 11 miles and 8.54 miles southeast

The distance can be calculated directly by adding up the individual distance.

d = 8+3d = 11 miles

To calculate the displacement of Stefan, we make use of the Pythagoras theorem.

From Pythagoras theorem,

Formula:

a² = b²+c²................ Equation 1

Where:

a = Stefan's resultant displacementb = Stefan's displacement to the southc = Stefan's displacement to the east.

From the question,

Given:

b = 8 milesc = 3 miles.

Substitute these values into equation 1

a² = 8²+3²a² = 64+9a² = 73a = √(73)a = 8.54 mile southeast.

While the displacement is 8.54 miles southeast.

Hence, Stefan's distance and displacement are 11 miles and 8.54 miles southeast.

Learn more about distance and displacement here: https://brainly.com/question/17273444

What is the height of a 50 kg person that has a potential energy of 4900J?

245,000m

98 m

10 m

Answers

Answer:

10 m

Explanation:

PE = mgh

m = 50kg

g= 9.8 m/s^2

h=?

so,

4900= 50×9.8× h

50h = 4900/9.8

50h = 500

h = 10 m

1) A ball is dropped from the Eiffel Tower (300 m), how long would it take for the ball to reach a velocity of 65 m/s? How far did the ball go in that time?

Answers

Answer:

Explanation:

If you drop a ball from

the top of a building it

gains speed as it falls.

• Every second, its

speed increases by

10 m/s.

• Also it does not fall

equal distances in

equal time intervals

• If the acceleration = 0 then the velocity is

constant. [remember that acceleration is

the rate of change of velocity]

• In this case the distance an object will

travel in a certain amount of time is given

by distance = velocity x time

• For example, if you drive at 60 mph for

one hour you go 60 mph x 1 hr = 60 mi.

What is the amount of work required to increase a 1100 kg car's speed from 20.0 m/s to 50.0 m/s?

Answers

La policía de los estados miembros se ha convertido de

LED lights will only work if the current is flowing in one direction. Which type of current would be best for powering an LED light bulb?



A.
Alternating current (AC) because with AC, the current flows steadily in one direction.

B.
Direct current (DC) because with DC, the current flows steadily in one direction.

C.
Direct current (DC) because DC provides more power but over shorter distances.

D.
Alternating current (AC) because with AC, the current periodically reverses.

Answers

Answer:

c

Explanation: i took the same text and got a 90

Direct current (DC) would be best because with DC, the current flows steadily in one direction.  correct   answer be Option (B).

What are direct current and alternating current?

There are two main methods for creating electric current. Direct current (DC) and alternating current (AC) are these (AC).

Direct current is a technique in which electricity consistently flows in the same direction, like the flow of a river. It discusses how electricity generated by solar panels, batteries, and other sources flows.

On the other hand, alternating current (AC) is a method in which the positive and negative sides are alternately switched at regular intervals, thereby altering the direction of the energy flow. This is the electricity that is provided by a plug-in or a generator. Both the electricity generated at power plants and the electricity delivered to homes are transmitted using alternating current.

So, Direct current (DC) would be best for LED lights will only work if the current is flowing in one direction.

Learn more about Direct Current here:

https://brainly.com/question/2625601

#SPJ2

A dumptruck filled with sand moves 1.8 km/h when it begins to accelerate uniformly at a constant rate. After traveling 4.0  102 m, the truck's speed is 24.0 km/h. What is the magnitude of the truck's acceleration?

Answers

The acceleration of the truck is obtained from the calculation done as  0.055 m/s^2.

What is the magnitude of the truck's acceleration?

We know that the acceleration is defined as the rate of the change of the velocity of the object with time and we can be able to obtain the acceleration by the use of the equations of kinematics as usual.

Initial velocity =  1.8 km/h  or 0.5 m/s

Final velocity = 24.0 km/h or 6.67 m/s

Distance covered = 4.0 * 10^2 m

Then;

v^2 = u^2 + 2as

v = final velocity

u = initial velocity

a = acceleration

s = distance covered

a = v^2 - u^2/2s

a = (6.67)^2 - (0.5)^2/2 *  4.0 * 10^2

a = 44.4 - 0.25/800

a = 0.055 m/s^2

Learn more about acceleration:https://brainly.com/question/12550364

#SPJ1

40 points and brainliest plz helppp luv yah thxx
A car moving at 10 m/s slows to a stop. It moves 25 meters forward while braking.
1. What is its braking acceleration?
Explain how you found your answer.

2. How much time does it take to slow to a stop?
Explain how you found your answer.

Answers

Answer:

hey want you to separate the energy’s and put them in the categories they go in like why are They different what is chemically different about them? Etc.why do they act differently.. do they act the same in some ways? Think about that

Explanation:

A player kicks a football into the air. It slows to a stop at its highest point in the air before falling to the ground. Which statement accurately describes the motion of the football?

Answers

Answer:

The answer is "The ball slows down in the air due to an unbalanced force "

Explanation:

If plays kick the ball, its object is mainly controlled by various forces its player's power as well as the other gravitational force, which acts in such a direction often focused from around Earth.  

Its force of its player will decrease because as strength of gravity is consistent, enabling both forces to interfere, therefore slowing the speed of football.

why would a rocket fall vertically downwards if it was launched vertically upwards​

Answers

Answer:

It would because the shape of the rocket is designed to be able to slice through the air as smooth as possible and now you may be thinking that air is already smooth but when you try to push something as large and heavy like a rocket then the shape of the rocket will be very important. The bottom of the rocket is flatter then the top so it is not designed to fly smoothly through the air. So the rocket would fall vertically downward(If it was still in one piece)because of it's shape. It is easier for the top of the rocket to go smoothly through the air then the bottom.

Explanation:

I am 90% sure this is correct but if I'm not please tell me

To solve this we must be knowing each and every concept related to rocket. Therefore, a rocket fall vertically downwards if it was launched vertically upwards​ because the bottom of a rocket is flatter than the top.

What is rocket?

A rocket is indeed a vehicle that accelerates by employing jet propulsion rather than the surrounding air. A rocket engine generates thrust by reacting to high-speed exhaust.

The reason would be that the shape of a rocket is meant to slice through air as smoothly as possible. You may assume that air already is smooth, but when we try to push anything as massive and heavy as a rocket, the shape of a rocket becomes quite crucial.

Because the bottom of a rocket is flatter than the top, it isn't designed to glide through the air gracefully. Because of its form, the rocket will fall vertically downward . The tip of the rocket travels more smoothly in the air than the bottom.

Therefore, a rocket fall vertically downwards if it was launched vertically upwards​ because the bottom of a rocket is flatter than the top.

To know more about rocket, here:

https://brainly.com/question/29070000

#SPJ2

Tyler drives 50km north. Tyler then drives back 30km south. What distance did he cover? What was his displacement?

Answers

Answer:

80 km is distance and 30km north is displacement

Explanation:

distance= 50+30=80km

displacement= 50-20=30

his displacement is 30km north

When Tyler drives 50 km north and then drives back 30 km south, we have:

1. The distance that he covers is 80 km.

2. Tylor's displacement is 20 km.  

1. The distance is a scalar that is given by the sum of the kilometers traveled by Tyler as follows:

[tex] d = d_{1} + d_{2} = 50 km + 30 km = 80 km [/tex]

Hence, the distance traveled by Tyler was 80 km.

2. The displacement is a vector that depends on the direction of travel. Takin the north direction as positive we have:

[tex] x = x_{1} + x_{2} = 50 km + (-30 km) = 20 km [/tex]

Therefore, Tyler's displacement is 20 km.

You can find more about displacement and distance here: https://brainly.com/question/4307551?referrer=searchResults

I hope it helps you!            

Similarities and differences between natural and synthetic for sugar

Answers

Answer:

THE REAL STUFF

For starters, sugar is sugar, no matter how it’s marketed, priced or packaged.  All sugar offers the same number of calories, although some may be less processed. It seems like every third day a “new” natural sugar emerges as the next best thing. Take for example, the increasingly popular coconut sugar or maple sugar, which are actually just fancy names with a heftier price tag for one ingredient: sugar. Your body can’t tell the difference between raw coconut sugar or processed table sugar, all sugar is metabolized and digested the same. While some more natural forms of sugar may contain a bit more minerals and haven’t undergone as much refinement, they really aren’t any healthier.

THE ARTIFICIAL STUFF

The most popular artificial sweeteners include sucralose (Splenda), aspartame (Equal) and saccharin (Sweet’N Low), neotame, and acesulfame-K are found in diet sodas, light yogurts or ice creams, sugar-free chewing gums and candies among other products. They’re oftentimes marketed as diet, sugar-free, calorie-free, low-calorie, skinny or light.

Artificial sweeteners are man-made, unnatural chemical compounds that our body doesn’t understand or know how to metabolize.  Some scientific evidence suggests artificial sweeteners may cause brain cancer or slow down metabolism – although most of these studies have been tested on animals, never humans.

Or what about the theory that eating alternative sweeteners makes you more inclined to eat a) a whole bag of sugar-free candies at one time, and b) overindulge in junk food later. Plus, certain types of sugar alcohols or sugar substitutes contain hard-to-digest ingredients that can manifest in symptoms of gastrointestinal discomfort, like bloating, gas, cramping, diarrhea, or even constipation.

There is no difference, not in any useful sense. Anything you might call sugar is one of a handful of molecules; sucrose, glucose = dextrose, fructose, maltose, and several others. Sucrose is the molecule most commonly meant by “sugar”.Your body doesn’t know or care where these molecules have come from. The sugar could be largely avoided while still getting the other benefits of plant-based foods.

What are greenhouse gases? Can you name any?

Answers

greenhouse gasses in the upper atmosphere trap heat from the Earth and reflect it back down rather than allow it to escape. This makes Earth progressively warmer.

A fire is burning in a fireplace. Where is the radiation?

A. You touch warm bricks next to the fireplace
B. You can feel the heat from across the room
C. Heat is rising up from the chimney

Answers

I think it’s A.
........

Which of the following best defines speed?
A. It is an objects speed at a specific point in time
B. It is the distance traveled by an object in a specific direction
C. It is a measure of how far an object moves over a certain amount of time
D. It is the total time over the distance

Answers

D. It is the total time over the distance

18.5 miles per second (30 km/sec). Choose the Earth movement that best relates to this description.

Earth rotates once every 24 hours

Earth orbits, with solar system, in the Milky Way Galaxy

Earth orbits the Sun

Earth moves with the Milky Way Galaxy through galactic space

Answers

Answer:

Earth orbits the Sun

Explanation:

HELP PLS HURRY !!!!!!!!!

Answers

The answer is Electrical Energy

Every spring has an equilibrium

Answers

R u asking if thats true or false or what?
Other Questions
This is a science question. What is the acceleration of this helicopter? Hammurabi's Code includes nearly 300 laws. For example, one law reads, "If a man put out the eys of another man, then his eye shall be put out." Although such punishments may sound cruel by mondern standards, they did encourage __________? a.powerb.fearc.social orderd.trade Location A on the surface of Earth bas a much higher temperature than Location Which statement is most likely true A.Both locations are at the poles B.Both are at the equator C.Location A is at the equator and Location B is the poles D.Location at the poles and location B is the equator Hector spent the last three months on a winter fishing boat in Alaska. He was doing research on population levels of fish for conservation efforts. Hector most likely works ina.Plant Systems.b.Agribusiness Systems.c.Natural Resource Systems.d.Environmental Service Systems The Inca empire was conquered by __________.A. CabralB. CortesC. de GamaD. Pizarro led to Spanish successa. one important leader b.Many factorsc. Military campaigns d.People could not control the thing that A system of beliefs or ideas that justifies the social, moral, religious, political, or economic interests held by a group or by society isa.a social movement.c.an ideology.b.a cultural lag.d.a vested interest.Please select the best answer from the choices provided Can someone please help me it's slope Which sentences contain a pronoun shift? Check all that apply. explain how you know the numbers of atoms in your formula. Carbon Monoxide What is water an example of Please answer correctly !!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!!! What attire would be appropriate for an interview for a summer job as a camp counselor?clean khakis and a nice collared shirtlong shorts and your favorite T-shirt a swim suit with cover-upwhatever is clean I need help please ASAP Why did Egyptian pharaohs seek to control the Kingdom of Kush?A. The land in Kush was more fertile.B. The climate of Kush was more pleasant.C. There were many gold mines in Kush.D. Kush was the birth place of Amon-Re Aiman has 6 pizzas to share at a party. If each person will eat 3/8 of a pizza, how many people can share the pizzas?A 48 people B 16 people C 2 people D 6 people Paraphrase the following paragraph (3) from Teaching Versus ActingIndeed, not all teachers are brilliant ones. There are specific skills that good teachers should have. For instance, the true teacher knows how to engage the audience and turn class into and interesting demonstration of knowledge. In other words, a good teacher understands that it is not enough to know the subject, one has to know how to make this subject interesting and attractive to the audience - students. So, teaching and acting are two sides of the same coin. Would you expect manganese(II) oxide, MnO, to react more readily with HF(aq) or NaOH(aq)? plzI will mark brainliest Enlightenment philosophers believed that human civilizations are similar to nature in that they are __________.