Physics College

Which of the following is NOT a natural
source of pollution?
A. erupting volcanoes
B. dust storms
C. construction
D. forest fires

Answers

Answer 1

Answer:

hi

Explanation:

answer is C

have a nice day

Answer 2
The answer is c.Construction as it is performed by human activity

Related Questions

3.
Two Cars, A and B, (starting, at the same time, from the same point) are moving
with average speeds of 40 km/h and 50 km/h, respectively, in the same direction.
Find how far will Car B be from Car A after 3 hours.
​

Answers

Answer:

car B will be 30 Km ahead of car A.

Explanation:

We'll begin by calculating the distance travelled by each car. This is illustrated below:

For car A:

Speed = 40 km/h

Time = 3 hours

Distance =?

Speed = distance / time

40 = distance / 3

Cross multiply

Distance = 40 × 3

Distance = 120 Km

For car B:

Speed = 50 km/h

Time = 3 hours

Distance =?

Speed = distance / time

50 = distance / 3

Cross multiply

Distance = 50 × 3

Distance = 150 Km

Finally, we shall determine the distance between car B an car A. This can be obtained as follow:

Distance travelled by car B (D₆) = 150 Km

Distance travelled by car A (Dₐ) = 120 Km

Distance apart =?

Distance apart = D₆ – Dₐ

Distance apart = 150 – 120

Distance apart = 30 Km

Therefore, car B will be 30 Km ahead of car A.

Which of the following is true of the deep
water layer of the ocean?
A. warmest and least dense of the ocean layers
B. experiences a rapid decrease in temperature
C. is warm in the summer and cold in the winter
D. cold all year round

Answers

The answer is D. :>

Brian Lara is a cricketer playing in the field on the second day of a cricket test-match. He exerts a forward force on the 0.145kg cricket ball, as he catches it, to bring it to rest from a speed of 38.2m/s. During the process, his hand recoils a distance of 0.135m. Determine the acceleration of the ball and the force which is applied to it by Brian Lara.

Answers

Answer:

a = -3984.6 m/s²

F = 577.76 N

Explanation:

The acceleration of the ball can be calculated by using the third equation of motion:

[tex]2as = v_f^2 - v_i^2\\[/tex]

where,

a = acceleration of ball = ?

s = distance covered = recoil distance = 0.135 m

vf = final speed = 0 m/s

vi = initial speed = 38.2 m/s

Therefore,

[tex]2(0.135\ m)a = (0\ m/s)^2-(38.2\ m/s)^2\\[/tex]

a = -3984.6 m/s²

here negative sign shows deceleration.

Now, for the force applied by Brian Lara will be equal in magnitude but opposite in direction of the force required to stop the ball:

[tex]F = -ma\\F = -(0.145\ kg)(-3984.6\ m/s^2)\\[/tex]

F = 577.76 N

Is this right or they wrong definitions which ones are the right ones someone !!!!!

Answers

Answer:

They are right.

Explanation:

Answer:

Mechanical Energy : KE + PE

Conversion : "When energy transfers from one form to another"

Potential Energy: the energy possessed by a body by virtue of its position relative to others , stresses within itself, electric charge , and other factors .'

Kinetic Energy: energy of an object in motion

Law of conservation of energy: KE+PE+friction=KE

Explanation:

First of all mechanical energy is kinetic energy plus potential energy (it is the energy of movement) So:

Mechanical Energy : KE + PE

Conversion is when energy converts or becomes a different form. So:

Conversion : "When energy transfers from one form to another"

Potential energy is stored energy, in Physics I or AP Physics I, it is often due to it being at a height, but batteries, foods, etc. are also example of it, so:

Potential Energy: the energy possessed by a body by virtue of its position relative to others , stresses within itself, electric charge , and other factors .'

Kinetic energy is for objects in motion so you got it right!

Kinetic Energy: energy of an object in motion

The law of conservation of energy means there is the same amount of energy before, as there is after, so when you see an equation with energy on both sides, it is usually this. Also, this is the last question left, so this has to be the answer.

Law of conservation of energy: KE+PE+friction=KE

sound wave of a wave length of 0.56 meters if its speed is 280 m/s what is the wave frequency

Answers

Answer:

500 Hz

Explanation:

Formula for finding wave frequency is,

f = c/λ

f = frequency

c = speed (m/s)

λ = wave length (m)

f = c/λ

f = 280/0.56

f = 500

∴ wave frequency is 500 Hz

Which is true?
a) A changing magnetic field produces a constant perpendicular magnetic field.
b) A changing magnetic field produces a changing perpendicular magnetic field.
c) A changing magnetic field produces a constant parallel magnetic field.
d) A changing magnetic field produces a changing parallel magnetic field.
e) A changing magnetic field produces an electric field.

Answers

Answer:

e)  A changing magnetic field produces an electric field.

Explanation:

Ok, we start with a magnetic field and let's study how it affects the motion of a single electron. As the magnetic field changes, it will cause an electromotive force, that moves the electron, and because now we have a moving electron, now we will have an electric field. (Such that the direction of the electromotive force opposes the direction in which the magnetic field changes). This also can be deduced if we look at the third Maxwell's equation:

dE/dx = -dB/dt

This says that the spatial change in an electric field depends on how the magnetic field changes as time pass.

Then the correct option is e)  A changing magnetic field produces an electric field.

what happens during subduction

Answers

Answer:

Subduction , Latin for "carried under," is a term used for a specific type of plate interaction. It happens when one lithospheric plate meets another—that is, in convergent zones —and the denser plate sinks down into the mantle.

What is characteristic of a good insulator?
A. Electrons are usually not moving at all.
B. Electrons are free to move around.
C. Electrons are semi-free to move around.
D. Electrons are tightly bound to the nuclei.

Answers

Answer:

D. Electrons are tightly bound to the nuclei.

Explanation:

In an insulator, the electrons of the outer most shell are bound with a very high electrostatic forces coming from the nucleus of each atom so electrons cannot flow around all atoms making up the material as in a conductor.

The characteristic of a good insulator is Electrons are tightly bound to the nuclei. (option d)

In a good insulator, electrons are tightly bound to the nuclei of their atoms. This means that they are not free to move around within the material, unlike conductors where electrons are relatively loosely bound and can move freely. Due to this strong binding, electrons in insulating materials cannot carry an electric charge or energy easily from one atom to another.

When an electric field is applied to an insulator, the electrons may experience a small displacement within their respective atoms, but they generally do not move from one atom to another or flow through the material like they would in a conductor. As a result, insulators prevent the flow of electric current and are used to isolate or protect conductive elements from accidental contact.

So, the correct answer is D. Electrons are tightly bound to the nuclei.

To know more about insulator here

https://brainly.com/question/2619275

#SPJ6

Other Questions
dose water come from the sewers Help me please thanks 13. Describe and correct the error in finding the product.X (x 5) = x 52 = x2 - 25 Am I correct plz help! only correct answers please there are few questions. this is a test. Explain any 2 significance of public administration. AbelMatch each example of an advertisement to the persuasive technique it is using.A pet food brand claims to use naturalname-callingingredients, unlike its competitors.An ad for perfume suggests the product willget the viewer a date.celebritiesAn ad to prevent texting while driving showsan image of a car accident.fearA shampoo ad uses a picture of a famousactor with great hair.associationCorrect! (please help)!!!!!!!!!!!!!! Most geologists think that the movement of Earths plates is caused by ____.a. Continental Driftb. Conductionc. Convection Current Can someone please tell me the answer Which of the following are the two factors used to calculate averagespeed? *a. total acceleration and total timeb. velocity and timec. total distance and total timed. motion and time can someone please help ASAP!!!! She loves Romeo but does not want to marry him.She believes Romeo does not really love her.She does not want to fall in love with anyone.She is too young to understand the meaning of love.estos sonwrong one es esta the anger he feels toward a certain woman.his certainty about his romantic fate.the extreme emotions that he is feeling.his confusion about Benvolios advice.Send a messageRead the list of words.circularcircuscircumnavigatecircumferencecircumstanceBased on the shared root, what is the common subject for all the words?circlesnavigationgeometryshapes Cora purchased a hotel building on May 17, 2020, for $3,000,000. Determine the cost recovery deduction for 2021. a.$76,920 b.$69,000 c.$48,150 d.$59,520 MARKING BRAINLIEST TO FIRST PERSON WHO IS CORRECT!I need help with #13 PLEASE HELP ME BRANLIEST FOR FIRST AND CORRECT ANSWERThere are 36 lines in the poem. The poem is numbered every 5 lines. ,end italics,,begin bold,A Saddle & the World,end bold, In Palestine, an old disheveled street,a wall of tiny shops, where grass grows between crumpled stone,I stand and watch in the shadow of the wall.Pots and tin pans and brooms and woven straw mats,even handmade saddles, spill into the narrow street.Heavy saddles, covered with burlap, to fit horses,mules, donkeys, sewn by someone who knows saddles.A woman in a ,begin italics,thobe,end italics,a long black dress,hand-embroidered with red cross-stitching on chest and sidespokes around the saddles.Bending down, she touches, pats, caresses,like a woman buying cloth.Finally she lifts her head, then do-si-dos,superscript,1,baseline,toward the bald man who owns the shopand asks the price of the saddle she likes best.But the price isn't set in stone and will change, like the weather,if you have some smarts at this haggling game.Like fencing,,superscript,2,baseline, you dance with agile steps around each other,touch with the point of your foil,,superscript,3,baseline, but never wound.He says, she says. Words fly, as conductor-handssweep the air for emphasis. The woman nods,and a corner of her mouth lifts. She fingers the coinsinside the slit in her belt."Sold! To the woman in embroidered dress!" the auctioneer would call outif she lived in Texas. Or Oklahoma. Or even New York.But in Palestine where she lives, a thousand women in embroidereddresseswould stand to claim the prize.I, in the uniform of my faded American jeans,ask the woman a foolish question,"How will you take this saddle home?"The woman's face cracks open, a smile spills out.Squatting, she picks up the saddle, an Olympian heavyweight champion,she hoists the saddle in the air, then lowers it onto her head.She stands tall, this Palestinian Yoga-woman, her head not merely holdinga saddle,But the world.("A Saddle & the World" by May Mansoor Munn. Copyright 1998 by May Mansoor Munn. Used by permission of the author.),begin bold,,superscript,1,baseline,do-si-do ,end bold,a circular dance move in which partners pass each other back-to-back,begin bold,,superscript,2,baseline,fencing ,end bold, the art of using a small sword (foil) to practice self-defense and offensive movements with an opponent,begin bold,,superscript,3,baseline,foil ,end bold, a small, light sword with a blunt edge and tip (used in fencing) The diameter of a circle is 6 kilometers. What is the area?d=6 kmGive the exact answer in simplest form.square kilometers Carla wants to save $55.50 to buy a new video game. Carla babysits her niece once a week and earns the same amount of money each week. After every time she babysits she donates $2 from the money she earned to the local food bank. Carla calculates that it will take her 6 weeks to save enough to buy her video game. Write and solve an equation to determine how much money Carla earns per week. Which of the following best describes a situation where an oligopoly exists?O A. A small number of producers command nearly the entire marketfor a certain good or service.B. A single producer is the only one selling a good or service with noclose substitutes.C. Many producers are selling slightly differentiated products thatare close substitutes of each other.D. A large number of businesses are selling identical products to awell-informed customer base. if Eli Whitney knew creating the cotton gin would increase slavery in the united states do you think he would still have created it? .50 ml of a solution are diluted to a volume of 100 ml. The concentration of the dilutedsolution is 2 M. What was the concentration of the original solution?pls answer asap! will mark as brainly ist!!