Calculate the efficiency of a hairdryer that has a total power input of 2000W and a useful power output of 1200W.

Answers

Answer 1
Answer would be 40 w

Related Questions

How are defenders on a baseball team positioned ?

Answers

Answer:

1 (pitcher), 2 (catcher), 3 (first baseman), 4 (second baseman), 5 (third baseman), 6 (shortstop), 7 (left fielder) 8 (center fielder), and 9 (right fielder)

Explanation:

There are nine fielding positions in baseball. Each position conventionally has an associated number, for use in scorekeeping by the official score

there’s 3 outfield , and the rest are infield !

A wave has a period of 4 seconds. Find it’s frequency.

Answers

Answer:

4 x the frequncy

Explanation:

So 4 x the number

A liquid has a specific heat of 9 J/g • °C and a solid has a specific heat of 3 J/g • °C. Which
substance, the solid or liquid will heat up faster? Which will cool down faster?

Answers

Explanation:

substances have been in direct sunlight for up to 60 minutes. ... cool the fastest? ... 0.60 J/g °C. Match & then label each substance with its specific heat capacity ...

Which location, 23 degrees or 48 degrees would experience the same earthquake at stronger intensity?Explain why.​

Answers

Answer:

48 degress

Explanation:

An earthquake causes many different intensities of shaking in the area of the epicenter where it occurs. So the intensity of an earthquake will vary depending on where you are. Sometimes earthquakes are referred to by the maximum intensity they produce. In the United States, we use the Modified Mercalli Scale. Earthquake intensity is a ranking based on the observed effects of an earthquake in each particular place. Therefore, each earthquake produces a range of intensity values, ranging from highest in the epicenter area to zero at a distance from the epicenter.

Tom puts a metallic cover over his car's windshield after parking. How does this control
the sun's rays during a sunny day?

Answers

The metallic cover deflects the suns rays

An ohm is best described as a unit of measure for...



A. electrical resistance


B. electrical current


C. electrical potential difference


D. magnetic field strength

Answers

The answears is b :))

What happens to the force between charged and uncharged objects as the distance between them decreases?

Answers

Answer:Thus, if each of the charges were reduced by one-half, the repulsion would be reduced to one-quarter of its former value. Also In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. ... And decreasing the separation distance between objects increases the force of attraction or repulsion between the objects.

Hope this helps have a awesome night/day❤️✨

Explanation:

Nothing, until those two objects physically touch each other; contact aligns polarity among the now single shared mass.

(Your question never states if both objects are unique or similar polar charges, so I just assumed they were both neutral objects existing within an electric field.)

So a better question would then be, what is gravity’s relationship with an electric field?

You could solve this with the following: confine the electric field’s volume to a set variable (never increasing nor decreasing in size or shape); density is variable and easily definable. This creates the limit to build upon. This density has to be fluid and has electron mass (full of electrons at rest mass, so with substance but no movement). Within, create a closed system (the hard part in this equation; outside interference like ambient light will eschew results) where each variable of kinetic energy then is accounted for or measurable (including heat and light, and the physical movement of the two objects)

Determine the mass for both objects, calculate gravity for both and each body’s inertia on the other as a sum over distance. record results. Polarity is shared across the masses until there is no longer inertia (one mass or contact).

West
East
<

50 Newtons
40 Newtons
What is the net force on the box?
А
10 Newtons West
B
10 Newtons East
с
90 Newtons West
D
90 Newtons East

Answers

The answer is A, 10 newton's west

A . 10 Newton West

that's my Answer

As time goes on, the ENTROPY in a closed system should increase. This is because of which Law?

A) Conservation of Energy
B) Conservation of Momentum
C) 1st Law of Thermodynamics
D) 2nd Law of Thermodynamics
E) None of these

Answers

Answer:

The answer is D

The second law of thermodynamics

rock at the edge of a cliff has kinetic energy because of its position.
True
False

Answers

its false rock is at edge

I need help on this question !

Answers

Answer:

A. Create habitats for coral, but not fish

Empujamos un baúl 3 metros, para ello aplicamos una fuerza de 200 Newton. ¿Cuál es el trabajo realizado?

Answers

Answer:

Trabajo realizado = 600 Nm

Explanation:

Dados los siguientes datos;

Fuerza = 200 Newton

Distancia = 3 metros

Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia

Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3

Trabajo realizado = 600 Nm

What happens to the arrangement of atoms in matter as it is heated?

Answers

Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance.

Explanation:

Atoms speed up and create more energy/heat.

What happens to particles of a substance as its temperature increases? A the average kinetic energy increases B the average kinetic energy decreases C the average kinetic energy stays the same D nothing happens

Answers

the answer is A. When the the temperature increases the kinetic energy increases

PLEASE HELLP ILL GIVE BrAINLY AND HEART

you are visiting a town that is in the middle of a large continent. How would you expect the ocean currents to effect the climate in the town?

A ) More Thunderstorms
B ) Cooler Temperatures
C ) Warmer Temperatures
D ) There is little effect on the town's climate

Answers

Answer:

D

Explanation:

What phase of matter are the particles least energetic, most dense, and best organized?
A. Plasma
B. Gas
C. Liquid
D. Solid

Answers

The answer to your question is D solid
The answer It’s D: solid

Warm air rises because it has less ___________.

Answers

Answer:

because it is less dense than the surrounding air

Explanation:

A hair dryer is rated at 1.2kW. When it is plugged into a standard outlet and turned on, what is the current in the hair dryer?

Answers

Answer:

1200 watts at a standard 120v draws 10 amps

pls help, i really dw fail :(​

Answers

Answer:

Using the Newton equation

V²=U² +2as

Given; V=9.2m/s U = 0m/s( because it starts from rest)

S=26.2m.

9.2²=0²+2(26.2)a

a =9.2²/2(26.2)

a=84.6/52.4

a=1.60m/s²

Answer:

2.A

3.D

Explanation:

HOPE THIS HELPS!! :)

A 2-inch, f/4 reflector has a focal length of:

6 inches
8 inches
4 inches
2 inches

Answers

I’m pretty sure it’s 8 sorry if I’m wrong

Explain why a charged body loses its charge if we touch it with our hand?

if u answer me I can give u brainliest ☺️​

Answers

Answer:

Explanation: A charged body loses its charge when we touch it with our hand because some of the charge flows through our body to the ground earthing. As a result the charge on the body decreases every time we touch it. This is because of earthing.

Explanation:

yw .

Explanation:

When we touch a charged body, it loses its charge, due to the process of earthing. Our body is a good conductor of electricity. It transfers the charges to the earth

Name two devices we use generators in. Describe how they work.

Answers

Answer:

There are two fundamental types of generators known as AC (alternating current) and DC (direct current) generators. While the technique of producing electricity is the same in both types, AC and DC power become different in terms of their applications – the way in which loads receive electric power.

Explanation:

An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output. ... Instead, it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit.

These are the reactant in a chemical equation: 6 CO2 + 6 H2O --> C6H12O6 + 6 O2

Answers

Answer:

Carbon Dioxide and Water.

Explanation:

This is the chemical formula for photosynthesis!

you do no know an objects velocity until you know its _____.

Answers

I agree with the answer above, but since velocity is a vector, I think displacement would be a better answer :)

The speed of sound through diamond is about 12,000 m/s. The speed of sound through wood is about 3,300 m/s. Which statement explains
why the speed of sound is different through these materials? (1 point)

Answers

Answer: They have different rigidities.

Explanation:

A sharpening wheel is traveling at 5 rad/s, it slows down to rest in 30 seconds while sharpening an axe. What is its angular acceleration?

Answers

Answer:

Angular acceleration [tex]= 0.167[/tex] rad/s^2

Explanation:

Given

Initial Angular velocity (w1) [tex]= 5[/tex] rad/s

Final Angular velocity (w2) [tex]= 0[/tex] rad/s

Time taken to change velocity from w1 to w2 [tex]= 30[/tex] seconds

Angular acceleration is equal to the change in angular velocity to the time taken for making thing change

Hence, Angular acceleration

[tex]\frac{w_2 -w_1}{t} \\\frac{5-0}{30}\\0.167[/tex]rad/s^2

1. What is the difference between thermal energy and heat? Give an example.

Answers

Answer:

when you run u get tied

Explanation:

I do not now this one

(Cr(NH3).](Co(CN)6) is a coordination complex
compound. What is the percent composition of carbon in this
compound?

Answers

Answer:19.51%

Explanation:

After reading a book, Julio looks out of the window and sees clouds in the distance. Which change allows Julio to clearly see the clouds after looking at his book? His corneas become flatter. His lenses change shape. His optic nerves begin sending signals. His vitreous humor becomes denser.

Answers

Answer:

Lens change

Explanation:

by changing the shape of the lens the rays from the clouds will be able to refract correctly in the lens then create the correct upside-down image on the retina.

Hope it helped

PLS mark BRAINLIEST

Answer:

His lenses change shape.

Explanation:

just took the quiz

HELP ME PLEASE I need the answer now and I will give all my brain lists

Answers

Answer:

I'd say it's B

Sorry if I get you wrong-

Other Questions
a) BCD is a straight line.Triangle ABC is equilateral.CE = DEENot drawnaccurately320BWork out the size of angle x.(4) recall one detail from the passage above that you found interesing about martha washington 108 divided by 2 1/2 Can somebody please help me with this I only have 10 minutes and I have to do other work please do all three questions in the pictures! HELP ASAP I WILL MARK BRAINLIST!!!! Imagine that you are an Elizabethan Londoner who regularly attends the theater. A friend who has never been to the theater wants to know what it's like to see one of Shakespeare's plays at the Globe. Write a letter describing your experience. Continue your description on the back of this page. please help will give brainliest The width of the wall is X +2 feet in the diagram if the perimeter of the wall is 6X +10 feet what is the length of the wall suppose you find a paper clip stuck to a magnet you pull off the paper clip and move it to a short distance away from the magnet what happened to the magnetic Force between the magnet and the paper clip A. it disappears B. it gets stronger C. it gets weaker D.it stays the same University Printing Services offer a program of reproducing class notes for participating professors teaching large classes with an enrollment uniformly distributed between 200 and 300 students. Professor Pulat has subscribed to this program. A copy of her notes costs $8 to produce and it sells for $12. The students purchase their books at the start of the semester. Any unsold notes are shredded for recycling as she makes changes to her notes every semester. In the meantime, when all copies are sold, no additional copies are printed. If the University Printing Services wants to maximize its revenues, how many copies should it print Sheryl has a recipe for pasta withvegetables. The recipe calls for130 grams of vegetables and twice asmuch pasta as vegetables. What is thetotal mass in grams of the recipe? Read this excerpt from Exploring the Titanic.Soon I had spent more hours in the deep ocean than any other scientist. But the Titanic continued to haunt me. My oceanographic colleagues scoffed at my Titanic dreams and told me I should devote myself to "real" scientific projects.Colleagues aresubjects in a science experiment.friends who have different interests.fellow workers in the same field of study.family members who support each other What case overturned this decision i will give you brainliest whoever answers correct first!! -24 = x - ( - 2 need help please 8th class 10th lesson Answer. Why do some organisms never turn into fossils?A. They are far too large to be buried in the ground.B. They are made mostly of soft tissues.C. They contain too much protein to be preserved.D. They contain chemicals that prevent the hardening of their bodies. four swimmers each completed 25 yards of a 100 yard relay in the order that they swam, the swimmers times are given below.First swimmer in the relay: 13 secSeconed swimmer in the relay: 14.273 secThird swimmer in the relay: 16.04 secFourth swimmer in the relay: 11.802 secWhich statment is true A. The differance between the slowest and the fastest 25-yard times was 5.842.B. The teams total 100-yard relay time was 55.079 sec.C. The last two swimmers took a total of 27.842D. The second swimmer was 2.127 sec fasterbthen the third swimmer ANSWER QUICKLY FOR 15 POINTS!! :,)Mrs. Gregorys class is building a model of a farm. They will use a cylindrical oatmeal container to make a portion of the barn. The container is 8 inches tall and has a radius of 2.5 inches.What is the total surface area of the oatmeal container to the nearest tenth of a square inch?164.9 square inches157.1 square inches39.3 square inches125.7 square inches What does it mean when we say that DNA replication is semiconservative ? Help please I dont know it