For life to flourish on Earth, several changes occurred that affected the atmosphere, such as _____.

Answers

Answer 1

Answer: evolution of cyanobacteria that produce O2volcanic outgassing to create a thicker atmosphereformation of an ozone layer to block harmful radiationall of the aboveonly a and c

Are the options

Related Questions

Prove that an electron cannot exist in the nucleus
According to Jean Piaget, unrealistic idealism often occurs in adolescence as a result of __________.
Imagine that a tank is filled with water. The height of the liquid column is 7 meters and the area is 1.5square meters (m2 ). What's the force of gravity acting on the column of water? A. 73,500 N B. 102,900 N C. 68,600 N D. 110,700 N
What are the factors on which pressure of liquids depends??
. Which of the following is not an ultimate goal of science?A. Understand patternsB. Give explanations for natural eventsC. Make predictionsD. Produce unchanging, absolute answers

If the frequencies of two component waves are 24 Hz and 20 Hz, they should produce _______ beats per second. A. 2
B. 8
C. 4
D. 12

Answers

This can be answered using the beat frequency formula, which is simply the difference between 2 frequencies.

Let: fᵇ = beat frequency
f₁ = first frequency
f₂ = second frequency

fᵇ = |f₁ - f₂|

substituting the values:
fᵇ = |24Hz - 20Hz|
fᵇ = 4Hz

The unit Hz also means beats per second, therefore:
fᵇ = 4 beats per second

Therefore, the answer is C. 4

C. 4 beats per second is correct

A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.15 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at A and B is EPEA - EPEB = +9.0 10-4 J. (a) Find the magnitude and direction of the electric force that acts on the particle. _______N the direction of motion (along, against, perpendicular)
(b) Find the magnitude and direction of the electric field that the particle experiences. _______N/C the direction of motion (along, against, perpendicular)

Answers

The magnitude of the electric field is 4000 N/C while the direction of the electric field is along the direction of the motion of the charge.

Given to us

Charge of the particle, q = +1.5 µC = 1.5 x 10⁻⁶

Distance between points A and B, d = 0.15 m

The particle's electric potential energy at A and B

= $\rm EPE_A - EPE_B$ = +9.0x10⁻⁴ J

What is the magnitude and direction of the electric force that acts on the particle?

The electric charge in electric potential energy is equal to the work done by an electric field. therefore,

$\rm W=EPE_A - EPE_B$

W = 9.0x10⁻⁴ J

We know that work done by the system can be given as,

$\rm Work = force* displacement$

Substitute the values,

$9 * 10^(-4)= F * 0.15$

F = 1.5 x 10⁻³ N

Thus, the magnitude of the force is 1.5 x 10⁻³ N while its direction is along with the motion of the charge.

What is the magnitude and direction of the electric field that the particle experiences?

We know the relationship between electrostatic and electric force, therefore,

$\rm Force = charge* Electric\ field$

Substitute the values,

$6* 10^(-3)=1.5* 10^(-6) * \rm E$

E = 4000 N/C

Hence, the magnitude of the electric field is 4000 N/C while the direction of the electric field is along the direction of the motion of the charge.

Learn more about the Electric field:

brainly.com/question/12757739

Answer:

Part a)

$F = 6 * 10^(-3) N$

Direction of force is along the motion of charge

Part b)

$E = 4000 N/C$

direction of electric field is along the direction of motion

Explanation:

Part a)

As we know that the change in electric potential energy is equal to the work done by electric field

$W = EPE_A - EPE_B$

$W = 9.0 * 10^(-4) J$

now from the equation of work done we know that

$W = F.d$

$(9.0 * 10^(-4)) = F(0.15)$

$F = 6 * 10^(-3) N$

Direction of force is along the motion of charge

Part b)

As we know the relation between electrostatic force and electric field given as

$F = qE$

$(6 * 10^(-3)) = 1.5 * 10^(-6) E$

$E = 4000 N/C$

direction of electric field is along the direction of motion

A 139 kg physics professor has fallen into the Grand Canyon. Luckily, he managed to grab a branch and is now hanging 89 m below the rim. A student (majoring in linguistics and physics) decides to perform a rescue/experiment using a nearby horse. After lowering a rope to her fallen hero and attaching the other end to the horse, the student measures how long it takes for the horse to pull the fallen physicist to the rim of the Grand Canyon. The acceleration of gravity is 9.8 m/s 2 . If the horse’s output power is truly 1 horsepower (746 W), and no energy is lost to friction, how long should the process take? Answer in units of s.

Answers

In order to lift the fat (306 lb) physics professor 89 meters up to
the rim, he'll need more potential energy, equal to

(mass) x (gravity) x (height) = (139 x 9.8 x 89) = 121,236 joules .

If the faithful horse delivers 1 constant horsepower = 746 watts,
AND if the cute-as-a-button student has instantly figured out a
way to keep the rope sliding around the edge without any friction,
then the soonest Prof. Tubby can arrive at the rim is

(121,236 joules) / (746 joules/sec) = 162.5 seconds .

Nowhere in this tense drama has the student needed her linguistics
skill yet, but I'll bet it comes in handy as she attempts gamely to
comprehend all of the various pleadings, prayers, and expletives
uttered by her heavy hero from the time he falls over the rim until
he's again lifted to it.

What would be the result of an alpha particle coming into a magnetic field?A) The alpha particle will stop moving.
B) The alpha particle will reverse its direction.
C) The alpha particle will be deflected in a curve path.
Eliminate
D) The alpha particle will continue to travel in a straight line.

Answers

Answer:

C. The alpha particle will be deflected in a curve path.

Alpha particles are nuclei of helium and consist of two neutrons and two protons. So, they are positively charged.

Then the alpha particle will be deflected by a magnetic field.

Light bounces off the surface of an object in a process called

Answers

Light bounces off the surface of an object in a process called REFLECTION.

Reflection is the answer

Imagine a 10kg block moving with a velocity of 20m/s to the left. Calculate the kinetic energy of this block.

Answers

KE =1/2mv^2=0.5 * 10 * 20^2= 5*400=2000

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Computers have become a familiar ___ of communication, connecting people around the world.a. mediationb. proponentc. mediumd. exposition