Which of the following could be used to convert chemical energy to heat energy?
a. a chair sitting still
c. a leaf absorbing sunlight
b. a battery powering a flashlight d. a rock hitting the ground

Answers

Answer 1

Answer:

C

Explanation:

Inside a battery there are chemical reactions. When the battery is powering a flashlight, this chemical energy gives a heat one.

Answer 2
your answer will be a battery powering a flashlight

Related Questions

If the cross-sectional area of a wire is decreased while all other factors remain the same, how will the resistance change?
OA
It will increase
OB.
It will decrease.
OC. It will go to zero.
OD
The cross-sectional area does not affect the resistance.

Answers

Answer:

The answer is OA it will increase.

Explanation:

OA I just answer that question

A certain light bulb consumes 200J of electrical energy per second, but only emits 25J of light energy per second. Calculate the efficiency of this bulb.

Answers

Answer:

The answer is 12.5%

Explanation:

The efficiency of a light bulb is:

Light energy comes out of the bulb / Electrical energy that was put in

= 25J / 200J = 12.5%

12.5% it told me that it had to be 20 characters long to submit it so there

Which statement is true of the electric field at a distance from the source charge?
O A. It is independent of the source charge.
OB. It is directly proportional to the source charge.
OC.
It is inversely proportional to the source charge.
OD.
It is directly proportional to the distance.

Answers

Answer:

the correct answer is B. it is directly proportional to the source charge.

Answer:

B is the correct answer.

At what distance from the centre of the earth its acceleration due to gravity becomes one third only? [Mass and radius of earth = 6x10 24 kg & 6.4x10 6 m resp.]

Answers

Answer:

235

Explanation:

235 is the answer sir

How many liters in 1 milliliter ??? HELP PLZ

Answers

It’s 0.001 liter
Hope it helps

Contrast electron movement within conductors and insulators.

Answers

Answer:

Electrons surrounding a nucleus are attracted to the protons within it because electrons and protons have opposite charges. Electrons closest to the nucleus are attracted with such a force that they can’t escape from the atom. These electrons tend to shield the protons from electrons that are farther away because electrons have the same charge and repel each other. Electrons that are farther away have less attraction to the protons within the nucleus and are more likely to be detached from the atom.

Electrons can be transferred from atoms of one body to atoms of another body through friction. This can occur when one body is rubbed against another or when a liquid flows across a solid. In either case, one body may be given a positive charge while the other body is given a negative charge of the same magnitude. Both charges are developed at the same time. Electrons can also be transferred from one body to another when a charged body comes into contact with an uncharged body. The electrons move in the direction that will equalize the charges; thus, the uncharged body will be given the same charge as the charged body.

Free electrons move from points of negative charge to points of positive charge. When these electrons move freely from one point to another with little resistance, the material they’re traveling through is said to be a conductor. Conductors have a large number of free electrons. Insulators, on the other hand, have very few free electrons and offer great resistance to the movement of these electrons. Electric charges produced on one end of a body composed of insulating materials will most likely not spread throughout the body. In a conductor, this charge would spread throughout the entire body. Metals are generally conductors; oils, rubber, air, porcelain, and plastics are good insulators.

Lightning is produced by the rapid transfer of free electrons when one of the following conditions exist:

One part of a cloud is positively charged and a neighboring part of the same cloud is negatively charged.

A positively charged cloud comes near a negatively charged cloud.

A cloud with either a positive charge or a negative charge comes near the earth.

Explanation:

Free electrons are abundant in conductors. Conversely, insulators provide a high level of barrier to the movement of these free electrons, since they have some of them. In a body made of insulating materials, electric charges generated on one end are likely to remain localized there.

What are conductors?

Electrons can move freely between particles when they are in conductors, which are substances. The charge can be transported across the whole surface of an object constructed of a conducting substance.

Because distant electrons have the same charge as these nearby ones and resist one another, these electrons usually act as a shield for protons. Further distant, electrons are less attracted to the nucleus's protons and are therefore more prone to break away from the atom.

Free electrons migrate from negatively charged to positively charged locations. The substance these electrons are passing through is referred to as a conductor when it allows them to go easily from one location to another with little resistance. Electrons are abundantly free in conductors.

A body made of insulating materials will likely not conduct electricity when it generates charges on one end. This charge would permeate the entire body of a conductor. Oils, rubber, air, porcelain, and plastics are effective insulators while metals are typically conductors.

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In the diagram, q1 = +6.60*10^-9 C and q2 = +3.10*10^-9 C. Find the magnitude of the total electric field at point P. pls help?

Answers

Answer:

|E(t)| = 1258,46 [N/C]

α = 67,5⁰  (angle with respect x-axis)

Explanation:

E(t)  Electric Field is a vector, so we need to determine module and direction

E(t)  =  E(q₁)  + E (q₂)  Where E(q₁) and E (q₂) are electric fields due to electric charge q₁ and q₂  respectively.

E(q₁) = K * q₁/ (d₁)²         K = 9 *10⁹   [N*m²/C²]    d₁ = 0,350 m

E(q₁) = 9 *10⁹ * 6,6*10⁻⁹ / 0,1225      [N*m²/C²] *C/m²

E(q₁) = 484,9 [N/C]

E(q₂) =  9 *10⁹ * 3,1*10⁻⁹ / 0,024025

E(q₂) = 1161,29

Then

|E(t)| = √ |Eq₁|² + |Eq₂|²

|E(t)| = √ ( 484,9)² +( 1161,29)²

|E(t)| = √ 235128 + 1348594,46

|E(t)| = 1258,46 [N/C]

And tanα = 1161,29/484,9        tanα =  2,395      α = 67,5⁰

The angle of the vector electric field with the x-axis

Answer:

1258.46 N/C

Explanation:

acellus


When an object is fully magnetized, all of its magnetic domains will be ?

Answers

Answer:

magnetically saturated

Explanation:

When all of the domains are aligned, the material is said to be magnetically saturated. When a material is magnetically saturated, no additional amount of external magnetization force will cause an increase in its internal level of magnetization.

hope this helps u :)

Guys I really need help with this question ): can someone give me the answer to this thanks

Answers

Answer:

the answer is

D) -1.5

Explanation:

[tex] \frac{ - 1.5}{1} [/tex]

move -1.5 down

then 1 right

The answer is D I hope this helps you

There are traits like blood type and eye color, and others like speaking English or having a scar. What are the terms used to describe these different types of traits? How are each defined?
PLEASE ONLY ANSWER IF YOU KNOW
WILL GIVE BRAINLEIST

Answers

depending on Genetics the father genes depend on everything because they give most of the heredity and genetics to the child more than the mother does

hybrid is one out of two ways to describe this

A TV set shoots out a beam of electrons. The beam current is 10A. How many electrons strike the TV screen in a minute.

Answers

Answer:

600 mC

Explanation:

The charge of an electron is 1.6 x 10-19C so for a current with 10 mA, the charge going to screen in one second is 10 mC

so number of electrons, n = (10 x 10-3)/(1.6 x 10-19) = 6.25 x 1016  so in a minute the charge is 10 * 60 = 600 mC

Answer:

Total charge, q = It = 10 A x 60 s = 600 C

We know that, q = ne

So no. of electrons, n = q/e = 600 / (1.6×10-19) = 375x1019

A cylinder is submerged in water as illustrated in the diagram. At which two positions is the pressure the same?
1- A and B
2- B and C
3- A and D
4- B and D

Answers

Answer:

it is two or three

Explanation:

Answer:

2- B and C

Explanation:

The arrows are at the same location in opposite ends and are the same length.

HELP PLSSSSSSS ASAP FIRST CORRECT ANSWER WILL GET BRANLIST. A bunny accidentally knocks a basket of eggs off of a table. Luckily the basket lands safely on the floor with all the eggs unbroken. Air resistance is negligible. What is the acceleration of the egg-basket system in midair? A)The acceleration cannot be determined without knowing how hard the basket was pushed. B) Acceleration is downward and less than g because the eggs are light. C) The acceleration fluctuates because of the rolling of the eggs. D) Acceleration is downward with a magnitude of g because the system is a projectile.

Answers

Answer: i think is C

Explanation:

Because eggs do not have a good weight and the basket swings because not all eggs weigh the same there are small and large in the basket

I think it's this good luck :)

Answer:

Acceleration is downward with a magnitude of g because the system is a projectile.

Explanation:

PLS HELP. I WILL MARK U THE BRAINLIEST IF U ANSWER EVERYTHING STEP BY STEP AND CORRECTLY.

Answers

distance is the length of his trip so 15( 3+4+8)

displacement is how far he is from his original point ( -5)( -4^2 + 3^2 = 5^2) he was displaced 5 meters from his start position

the distance covered would be 15m and the displacement is 5m . Mark me brainliest bro

fill in the term to complete each sentence

a wave carries___ from one place to another.
mechanical waves carry energy through___.

Answers

Energy

A material medium

A wave carries energy from one place to another. Mechanical waves carry energy through a material medium.

What is a wave?

A wave is a phenomenon that flows across a material medium without leaving any lasting mark.

Mechanical or electromagnetic waves can be used to classify them. Transverse and longitudinal are the two main forms.

A wave carries energy from one place to another. Mechanical waves carry energy through a material medium.

Hence the correct options for the fill-in-the-blanks are energy and a material medium.

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In the diagram, q1= +8.0 C, q2= +3.5 C, and q3 = -2.5 C. q1 to q2 is 0.10 m, q2 to q3 is 0.15 m. What is the net force on q2? Label sign for charges (+ or -). (Unit = N). pls help?

Answers

Answer:

f(t) =  28,7 [N]

Explanation: IMPORTANT NOTE: IN PROBLEM STATEMENT CHARGES ARE IN C (COULOMBS) AND IN THE DIAGRAM IN μC. WE ASSUME CHARGES ARE IN μC.

The net force on +q₂  is the sum of the force of +q₁  on +q₂ ( is a repulsion force since charges of equal sign repel each other ) and the force of -q₃ on +q₂ ( is an attraction force, opposite sign charges attract each other)

The two forces have the same direction to the right of charge q₂, we have to add them

Then

f(t) = f₁₂ + f₃₂

f₁₂ = K * ( q₁*q₂ ) / (0,1)²

q₁  = + 8 μC     then   q₁ = 8*10⁻⁶ C

q₂ =  + 3,5 μC  then  q₂ = 3,5 *10⁻⁶ C

K = 9*10⁹  [ N*m² /C²]

f₁₂ = 9*10⁹ * 8*3,5*10⁻¹²/ 1*10⁻²   [ N*m² /C²]* C*C/m²

f₁₂ = 252*10⁻¹ [N]

f₁₂ = 25,2 [N]

f₃₂ =  9*10⁹*3,5*10⁻⁶*2,5*10⁻⁶ /(0,15)²

f₃₂ =  78,75*10⁻³/ 2,25*10⁻²

f₃₂ =  35 *10⁻¹

f₃₂ =  3,5 [N]

f(t) =  28,7 [N]

Answer:

facts

Explanation:

What percent of the gross domestic product (GDP) is currently generated by the service industry?


68 percent

71 percent

82 percent

95 percent

Answers

The answer is 71 percent. To be more exact, it is 70.38.

The global economy is heavily reliant on the service sector, which accounts for more than two-thirds of global GDP, over three-quarters of foreign direct investment in advanced nations, the majority of worker employment, and the majority of job growth. Thus, option B is correct.

What GDP is generated by the service industry?

The service sector, often known as the tertiary sector, makes up the third tier of the three-sector economy. Instead of creating products, this sector provides training, consulting, and maintenance and repairs.

The GDP of the nation is significantly impacted by the service sector. Through trade in services, it not only generates many jobs, but also significantly improves the country's economic performance.

Therefore, 70% of GDP is made up of consumer expenditure. The retail and service sectors are important to the American economy.

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How many milligrams in 1 gram. ??? HELP !!!

Answers

1,000 milligrams = 1 gram
2,000 milligrams = 2 grams
3,000 milligrams = 3 grams
4,000 milligrams = 4 grams
1,000 milligrams = 1

PLS HELP. I WILL MARK U THE BRAINLIEST IF U ANSWER EVERYTHING STEP BY STEP AND CORRECTLY.

Answers

Answer:

Distance = 15m

Displacement = 5m

Explanation:

For distance add the values

For displacement use Pythagoras formula

15m and 5m is the answer

How many kilograms are in 2.5 grams ?

Answers

Answer:

0.0025 kilograms

Explanation:

There are a 1000 grams in 1 kilogram, so that means that there are

0.0025 kilograms in 2.5 grams.

Answer:

Below

Explanation:

● 1 kg = 1000 g

Divide both sides by 1000

● 1/1000 kg = 1000/1000 g

● 0.001 kg = 1 g

Multiply both sides by 2.5

● 2.5 g = 0.001 × 2.5 kg

● 2.5 g = 2.5 × 10^(-3) kg

● 2.5 g = 0. 00 25 kg

3. There are twice as many people in the household, but your income has also doubled. Is your new

tax liability about twice as much as when you were single, more than twice as much, or less than

twice as much? Tell whether you think this difference-or the lack of one-seems fair.

Answers

Answer:

The answer is less than twice as much.

Explanation:

When the income doubles, the personal tax liability also doubles. However, because I have more dependents on my household, I'm able to get tax reductions to take care of the dependents.

The answer is less than twice as one

What does a mechanical wave do with its energy?

Answers

Answer: A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission the material is limited. Therefore, the oscillating material does not move far from its initial equilibrium position. Mechanical waves transport energy.

Explanation:

How many millimeters are 120 meters ? Help ! Please <3

Answers

The answer is 120000

why is science always changing

Answers

Answer:

Science is changing because little by little scientists descover new things.

Explanation:

Discovery

Hope this helps:)

Because scientists discover new things, new ways to think about a singular method or principle

I need help with this question I added an image so y’all can see !

Answers

Answer:

a) .66

Explanation:

from (0,4) to (3,6)

the slope would be

[tex] \frac{2}{3} [/tex]

when diving the fraction the half slope is .66666...

The way I learned was to count the ”rise over run”. Count how many blocks are between the origin and point 4, obviously 4 blocks. (this is the ”rise”) Next, you count the number of blocks between -6 and the origin, 6. (this is your run). Then you place the rise over run to get 4/6 then divide to get 0.66. ☺️

if a source of sound waves is rabidly approaching a person the sound heard by the person appears to have?

Answers

Answer:

have a frequency. higher than the frequency actually produced by the source.

Explanation:

Answer:

If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have - a pitch lower than the original pitch.

Based on what you know about how light travels, explain why
you can't see the back of your own head without using a mirror,
camera or other device.

Answers

You can’t see the back of your head because the mirror is not in the direction of the back of your head

Use the drop-down menus to answer the questions.
Which type of mirror curves outward?

Which type of mirror always has an image that is smaller than the object?

Which type of mirror is used to focus light rays?

Which type of mirror has a flat surface?

Answers

Explanation:

1. Convex mirror is curved outward.

2. Convex mirror forms an image that is smaller than the object.

3. Concave mirror is used to focus light rays. That's why it is also known as a converging mirror.

4. Plane mirror has a flat surface. It forms the same size of the image as that of the object.

The reflective surface of a convex mirror, also known as a curved mirror, bulges toward the light source.

Thus, A curved mirror's surface can be convex, meaning it bulges outward, or concave, meaning it bulges inward. Since a convex mirror reflects light outward, it cannot be utilized to concentrate light.

Because the focus and center of curvature are fictitious positions inside the mirror and are therefore unreachable, convex mirrors or curved mirrors always produce a virtual image.

As a result, convex mirror images cannot be projected onto a screen. The picture is also smaller than the projected object, but it grows larger as it goes closer to the convex mirror.

Thus, The reflective surface of a convex mirror, also known as a curved mirror, bulges toward the light source.

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Johnathan wants to lift a 200N box onto a 5m ledge. How much work is done?
a. 1000 J
b. 40 J
c. 0.025 J
d. 195 J

Answers

Answer:

1000 J which agrees with answer a in your list of options

Explanation:

Recall the formula for work (W) as the force (F) applied times the distance (d) covered in the same direction of the force:

W = F * d

W = 200 N * 5 m = 1000 J

the answer is - a - 100 j

What is a healthy way to cope with distress

Answers

Sleeping and eating
Other Questions
Would someone help me rewriting these sentences correctly. Thank you. In order to study the mean blood pressure of people in his town, Richard samples the population by dividing the residents by age and randomly selecting a proportionate number of residents from each age group. Which type of sampling is used? a. Convenience sampling b. Cluster sampling c. Stratified sampling d. Systematic sampling Please Help! Three times the quantity of a number increased by 7 is equal to the same number decreased by 15 Apply the square root property of equality.x + = Use the diagram to complete the statement. Triangle J K L is shown. Angle K J L is a right angle. Angle J K L is 52 degrees and angle K L J is 38 degrees. Given JKL, sin(38) equals cos(38). cos(52). tan(38). tan(52). youwork.Factor each expression. If the expression cannot be factored, writecannot be factored. Use algebra tiles if needed. (Examples 4,5,64. 3x + 65. 2x - 156.12x+30y Find the value of x. Determine whether the word in bold is a plural noun, a possessive noun, or neither of them. Maureens goal is to play drums in Lons band. Question 41 options: a) plural b) possessive c) neither of them List the angles in order from the largest to the smallest for ABC.AB= 14, AC = 15, BC = 16 Mrs. Patterson was told by Chris's previous teacher that he cannot sit still and often disrupts class discussion. As a result, Mrs. Patterson assigned Chris a seat in the back of the room and does not call on him. He becomes disinterested and shouts out during discussion. The result is an example of During the Paleocene-Eocene Thermal Maximum, when global surface temperatures spiked, we observe temperate forests ____________________, insect herbivory of temperature. How much energy is required to accelerate a spaceship with a rest mass of 121 metric tons to a speed of 0.509 c? Is MNO=PQR? If so, name the congruence postulate that applies.Given:ME=PQNO=QRMO=PRA. Congruent - ASAB. Congruent - SSSC. Congruent - SASD. Might not be congruent write a strong cause and effect paragraph If the area of the square is A(s) = s, find the formula for the area as a function of time, and then determine A(s(3)). -What is the product?(-3s +2)(4s-1) Simplify:[tex] \frac{ {a}^{5} {b}^{8} }{ {a}^{4} {b}^{10} } [/tex]HELP! answer if you can ! The period of a pendulum is the time it takes the pendulum to swing back and forth once. If the only dimensional quantities that the period depends on are the acceleration of gravity, g, and the length of the pendulum, , what combination of g and must the period be proportional to? (Acceleration has SI units of m s-2.) The enormity of the temple rebuilding process, economic hardships, and opposition from the surrounding peoples stalled the project for sixteen months.a. Trueb. False Which of the following is not a good example of a marketing-related key success factor? A. a well-known and well-respected brand name B. breadth of product line and product selection C. proven ability to improve production processes D. clever advertising E. courteous, personalized customer service