What are the northern lights?

Answers

Answer 1

Answer:

The northern lights, one of several astronomical phenomena called polar lights (aurora Polaris), are shafts or curtains of colored light visible on occasion in the night sky.

Explanation:


Related Questions

Ribosomes are like tiny “factories” within cells that do all of the following EXCEPT:

Answers

Answer: translate DNA into RNA <3

Explanation:

An RNA polymerase binds to promoters and then breaks down hydrogen bonds between two strands of the DNA and attaches on one of them. A DNA strand is used as a template for a new RNA molecule. In this way, pre-mRNA is made, which becomes mRNA after the introns are removed.

A mRNA molecule enters the ribosomes, located in the cytoplasm. In these organelles, a transfer RNA attaches to a mRNA and the process of translation begins. The final product is a polypeptide chain.

Question 3 of 10
What theory did Alfred Wegener come up with when he noticed that the
continents on Earth fit together?
A. Evolution
B. Ice age
C. Continental drift
D. Ring of Fire
SUBMIT

Answers

He came up with C, continental drift

The box is pushed to the right with a force of 40 Newtons and it just begins to move what is the maximum static frictional force

Answers

Answer:

The maximum static frictional force is 40N.

Explanation:

When an object of mass M is on a surface with a coefficient of static friction μ, there is a minimum force that you need to apply to the object in order to "break" the coefficient of static friction and be able to move the object (Called the threshold of motion, once the object is moving we have a coefficient of kinetic friction, which is smaller than the one for static friction).

This coefficient defines the maximum static friction force that we can have.

So if we apply a small force and we start to increase it, the static frictional force will be equal to our force until it reaches its maximum, and then we can move the object and now we will have frictional force.

In this case, we know that we apply a force of 40N and the object just starts to move.

Then we can assume that we are just at the point of transition between static frictional force and kinetic frictional force (the threshold of motion), thus, 40 N is the maximum of the static frictional force.

A plane is traveling at 300 m/s. How far will it travelin 1 hour?

Answers

Answer:

1080000

Explanation:

300 x 60s=18000m/minute

18000 x 60min=1080000m/h

Explanation:

Which statement is true when acids and bases are mixed together

Answers

Answer:Acids and bases cannot mix together. Acids and bases will neutralize each other. Acids, but not bases, can change the pH of a solution. Acids donate hydroxide ions (OH–); bases donate hydrogen ions (H+)

Does a generator start a Direct Current?

Answers

A direct-current (DC) generator is a rotating machine that supplies an electrical output with unidirectional voltage and current. ... The field is produced by direct current in field coils or by permanent magnets on the stator. The output, or armature, windings are placed in slots in the cylindrical iron rotor.

6 points
Several electric field line patterns are shown in the diagram below. Which
of these patterns are incorrect? Select all that apply.*
Diagram A
Diagram B
Diagram C
Diagram D
Diagram E

Answers

Diagram B, D, E is the incorrect ones

Answer: C, E, and D is incorrect

Explanation:

C is wrong because the arrows are going inside but they should be negative not positive. E is wrong because it should be positive not negative since the arrows are going outward. D is wrong because there are more arrows in the right side instead it is suppose to be on all sideS

Ill give brainliest! 1. Which item below describes a quick change to
Earth's landscape?
A. a stone becoming smooth
B. dirt moving down a steep hill
C. flat land becoming a canyon
D. a glacier flattening the land below it​

Answers

Answer:

hmmmmm

Explanation:

I am gonna say D.

if I am right plz give me a brainliest

Refer to the image shown to answer the question.

If a light ray is reflected off the shiny surface at 170 degrees, at what angle did the light ray first strike the surface?


170 degrees


70 degrees


110 degrees


10 degrees

Answers

Answer:10

Explanation: if you look it has a 170 but some people have 70 if you have 170 then it will be 10 if you have a 70 then it will be 110 if I'm right then Yw

Answer:

10

Explanation:

i took the quiz xoxo

Which of the following waves moves the slowest?

Select one:
a. Radio Waves
b. X-rays
c. Gamma Rays
d. Sound Waves

Answers

Answer:

x rays is the correct answer

How do you calculate the weight of a body from its mass?

Answers

Answer:

W = mg

Explanation:

The formula of Weight for given mass is

[tex]\large\boxed{\fcolorbox{blue}{yellow}{W = mg}}[/tex]

where,

m = mass of the body

g = accelaration due to gravity

For Example:

Q.) A body has mass 10 kg then fine it's weight

A.)

m = 10kg

g = 10m/s²

.°. W = mg

= 10 × 10

W = 100N

Thus, The weight of a body from its mass can be calculated by W = mg.

-TheUnknownScientist

calculate speed and velocity of the following. the race car was moving for 3.7 hours and during that time it traveled a distance of 500 miles south. what is the speed the car was travelling?

Answers

Answer:

v = 135.13 mph

Explanation:

Given that,

The race car was moving for 3.7 hours and during that time it traveled a distance of 500 miles south.

We need to find the speed of the car.

We know that,

Speed = distance/time

So,

[tex]v=\dfrac{500\ miles}{3.7\ h}\\\\v=135.13\ mph[/tex]

So, the speed of the car is equal to 135.13 mph.

Explain why astronomers divide the sun into different layers.

Answers

Answer:

cause why not.

the layers exist cause theoretically the deeper you go the hotter it gets and different atoms just do stuff

Question:
To increase the energy efficiency of their home, a Colorado family
installed a solar panel on its roof. They want to add another solar panel to
increase their ability to store energy for the winter. What happens to the
current (1) when they add another solar panel (V)? *​

Answers

Answer: When they add another solar panel, there will be INCREASE in current.

Explanation:

The movement of electric charges through a conductor is known as CURRENT (I) and is measured in ampere(A). Voltage is defined as the potential energy that moved charged particles. While resistance is the opposition to the flow of electric charges.

The increase in current abides by the rules of ohm's law which states that the electric current in a given metallic conductor is directly proportional to the potential difference (Voltage) applied between its ends, provided that the temperature of the conductor and other physical factors remain constant. This relationship simply means that increase in voltage will lead to increase in current in a circuit.This can be represented by an equation below:

V= IR

Where V = Voltage

I = Current

R = Resistance

Since increase in voltage lead to increase in current as seen in Ohm's law, therefore the addition of extra solar panels ( voltage) will lead to increase in current out put during winter.

explain how a syringe dra
ws blood from a patient's body​

Answers

Answer:

You first push in then when the syringe is full push the out

Explanation:

1. in

2. out

but u should watch a You-tube video just in case

I hoped this helped!

Why does our sun appear larger than any other star in our galaxy

PLS HELP & use your own words thanks

Answers

Answer:

The closer and bigger the star, the larger the star appears.

Explanation:

Since the sun is closer to us it shows up way larger than other stars in our galaxy.

Have a great day.

Answer:

It is the closest star to us. other bigger stars may seem small, but that is because they are far away. The more closer an object is, the smaller it seems to be.

Explanation:

Hope this helps!

explain in 2-3 sentences how a genotype determines a phenotype!
Will give b to the best one

Answers

Answer:

Genotype can be determined by biological tests. Both the genotype and phenotype sounds similar but have differences. The phenotype is determined by an individual’s genotype and expressed genes or by visible trait, for instance, hair color or type, eye color body shape, and height. We are all unique. Even monozygotic twins, who are genetically identical, always have some variation in the way they look and act. This uniqueness is a result of the interaction between our genetic make-up, inherited from our parents, and environmental influences from the moment we are conceived.

a
plastic tube which has been rubbed with animal fur and gained 3.8x10 electrons.

Answers

Don’t it is a bot scam don’t do it

1) A 1,600 kilogram car is also traveling in a straight line. Its momentum is 32,500 kg*m/s. What is the
velocity of the car?

Answers

Answer:

v = 20.31 m/s

Explanation:

p = mv -> v = p/m = 32,500 kg*m/s / 1,600 kg = 20.31 m/s

anyone know the answer?

Answers

i think the answer is true but not sure

10000 J of heat energy is absorbed per cycle by a diesel engine that is 11% efficient. How much energy does it expel to the environment per cycle? (J)

Answers

Answer:

8900 J

Explanation:

Let heat absorbed be Q1 and heat rejected be Q2.

Q1 = 1000 J, efficiency η = 11% = 0.11

Then, Efficiency of engine can be found be using the following formula,

[tex]\eta = \frac{Q_1-Q_2}{Q_1}[/tex]

⇒ [tex]0.11 = \frac{10000-Q_2}{10000}\\Q_2 = 10000- 1100= 8900 J[/tex]

Therefore, energy does it expels to the environment per cycle = 8900 J

​  

 

 

​  

13. How much work does a 35 N force do to lift a potted plant from the floor to a shelf 6 m high?
F = 35N
Id=6m
Wa

Answers

Answer:

W= 210 N

Explanation:

Just use work = Fparallel*d

W= 35*6

W= 210 N

A salt solution wil
conduct electricity, but a sugar solution will
not. Explain why.

Answers

That is because salt solutions contains Na+ and CI- ions When ions are present in the solution, these ions can move through the solution to carry an electric current. But sugar molecules DO NOT break down into ions when dissolved.

PLSSSS HELPPPP PLSSSS 25 POINTS PLS I REALLY NEED THIS AND GET THEM RIGHT SO PLS DONT ANSWER IF U DONT KNOW

Answers

Answer:

1- C   2-B    3-B   - these are ur best answers

Explanation:

Answer:

1. C(bone structure)

2. B (Common ancestor)

3.D (DNA)

Explanation:

Definition of an electrically charged object

Answers

Answer:

Electric charge, basic property of matter carried by some elementary particles that governs how the particles are affected by an electric or magnetic field. Electric charge, which can be positive or negative, occurs in discrete natural units and is neither created nor destroyed.

URGENT: write a simple equation relating the frequency (f) of a wave to its period (T)

Answers

Answer:

f(x) = mx + b

Explanation:

A 19 Ω resistor and a 4 Ω resistor are connected in series to an ideal 18 V battery.
A) Find the current in each resistor.
Answer in units of A.
B) Find the potential difference across the first resistor.
Answer in units of V.
C) Find the potential difference across the second resistor.
Answer in units of V.

Answers

Explanation:

First Calculate Total Equivalent Resistance (Series) :

[tex]R_{eq} = r_{1} + r_{2} = 23 \: ohms[/tex]

(A) Current in each resistor :

[tex]I = \frac{V}{R} = 0.78 \: A[/tex]

(Since this is a series connection, the electric current is same through both resistor).

(B) Potential Difference across the first resistor :

[tex]V = IR = 0.78 \times 19 = 14.82 \: V[/tex]

(B) Potential Difference across the second resistor :

[tex]V = IR = 0.78 \times 4 = 3.12 \: V[/tex]

Plz solve it quick I'm rlly in a hurry

Answers

A

Explanation:

When a liquid occupies a smaller volume, it exerts a higher pressure; when it occupies a larger volume, it exerts a lower pressure.

volume= mass÷density

A- 10÷2= 5cm³

B- 20÷1.6= 12.5cm³

C- 30÷1.2= 25cm³

D- 40÷0.7= 57.1cm³

Smallest volume is A, hence largest pressure. As I explained above

The closer the charged particles, the... the electrostatic force.

Answers

Answer:

please give me brain list and follow

Explanation:

Therefore, if the distance between the two charges is doubled, the attraction or repulsion becomes weaker, decreasing to one-fourth of the original value. If the charges come 10 times closer, the size of the force increases by a factor of 100. The size of the force is proportional to the value of each charge.

Why does food need to be broken down (made into chyme) in the stomach (Think about the next step in digestion)
Will mark braniest if correct and has clear explanation

Answers

Answer: Carbohydrates , proteins and lipids are large molecules that are needed by the body for growth, repair and metabolism . They are found in our food. These molecules are too large to pass from the intestine into the blood, so digestive enzymes break them down into smaller molecules.

Explanation:

Answer:

Digestion is the mechanical and chemical break down of food into small organic fragments. It is important to break down macromolecules into smaller fragments that are of suitable size for absorption across the digestive epithelium. Large, complex molecules of proteins, polysaccharides, and lipids must be reduced to simpler particles such as simple sugar before they can be absorbed by the digestive epithelial cells. Different organs play specific roles in the digestive process. The animal diet needs carbohydrates, protein, and fat, as well as vitamins and inorganic components for nutritional balance. How each of these components is digested is discussed in the following sections

Other Questions
The years 1894 to 1914 are often termed the Age of Modernity or the Age of Anxiety . How did Marie Curie's scientific discoveries support both of the these ideas HELP WRITING AN EASYSY I WILL BREAK IT AND BRAINLESS Help me write my reason 2 for exploring the ocean and the risk that are involved just need like about 5-7 sentences and I will make another one Read the following passage:Schools uniforms are not only ugly but infringe upon astudent's personal style. Requiring students to wear thesame outfit as everyone else is ridiculous! Some peoplesay that school uniforms would put the focus back oneducation and not on the latest fashions, but that is crazy.Which sentence best describes what's wrong with the tone of this passage?A. The writer does not take opposing views seriously,B. The writer uses informal word choice and punctuation.C. The writer focuses on trivial topics like ugliness.D. The writer does not support his or her opinion with evidence. Pls Need Help! Thank you what are the changes seen in boys at the time of puberty? Write a paragraph on one of the issues facing our planet nowadays Give each trig ratio as a fraction in simplest form. How much oxygen does theatmosphere contain?O 12%0 76%O 35%0 26% A parabola is graphed such that the axis of symmetry is x = 3. One of the x-intercepts is (5, 0). What is the other x-intercept? hi everyone want me to answer your modules? from grade 7-8i kinda want to do just a small bussiness so i can help with my mom for my tuition if you do message me in messenger name Kaczara Kisha Eimerh Rosales all you have to do is pay me maybe about atleast 20-30 pesos i really appriciate it if you do A washing machine uses 27 gallons of water to wash 3 loads of clothes. How many gallons of water would be used to wash 14 loads of clothes? What type of chemical replacement is RbNO3 + BeF2 Be(NO3)2 + RbF QuestionQuestion: 1-1AACPS Geometry Standard Assess Q3 20-21 ONLINESelected Response: 1 point for answer only.Examine the figure belowNote: Figurenot drawn toscale.The Mars Rover Curiosity is sending signals that it is driving into a crater at an angle of depression of 53.If the rover covers a horizontal distance of 110 meters, what vertical distance has it traveled? Round your answer to the nearest thousandth.O 137.735 meters82.891 meters87.850 meters145.975 metersConstructed Response: Work and answer will be scored on a 3 point rubric. Please answer in the space provided.After conducting a few experiments, the rover completes its journey by exiting the crater at a different location from where it entered. The rover travels up and outPauseNexte convert 17584000cm3 to kl Emi computes the mean and variance for the population data set 87, 46, 90, 78, and 89. She finds the mean is 78. Her steps for finding the variance are shown below.sigma squared = StartFraction (87 minus 78) squared + (46 minus 78) squared + (90 minus 78) squared + (78 minus 78) squared + (89 minus 78) squared Over 5 EndFraction. = StartFraction 9 squared minus 32 squared + 12 squared + 0 squared + 11 squared Over 5 EndFraction. = StartFraction 81 minus 1,024 + 144 + 0 + 121 Over 5 EndFraction. = StartFraction negative 678 Over 5 EndFraction. = negative 135.6What is the first error she made in computing the variance?Emi failed to find the difference of 89 - 78 correctly.Emi divided by N - 1 instead of N.Emi evaluated (46 - 78)2 as -(32)2.Emi forgot to take the square root of -135.6. I need this in atleast 5 minUS v. Nixon supports the:Hammarabi CodeRule of LawPlessy v. FurgesonMarbury v. Madison how do I work it out ? Use the word bank below to answer the questions that follow:chemicalmixtureheat capacityhomogeneous viscosity sublimationphysical property compound chemical formulasubstance densitymasstemperaturepressureheterogeneousThe ratio of the mass of a substance to its volume is called What are these answers please and thank youu?? What is the value of x?Enter your answer in the box.