Can someone help me with this please :(

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[tex]\pink{\boxed{\sf{↪Option.c↩}}}[/tex]

→Matter✓

[tex]\pink{\boxed{\sf{↪Option.d↩}}}[/tex]

→The sum of the kinetic and potential energy of an object✓

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Answer:

See below

Explanation:

At A they add together (they are both positive)= construct

At B they destruct  ( one is neg and one is pos)

c  destruct      d destruct     e  construct (both neg)

Answer:

[tex]40h[/tex]

Explanation:

Use the velocity formula to solve

[tex]v = \frac{d}{t}[/tex]

In this question, you are given velocity [tex]v = 45km/h[/tex], and you are given a distance, [tex]d = 1800km[/tex].  Time in this question is what you'll need to find.

Start by rearranging the velocity formula, to isolate for t.

[tex]v = \frac{d}{t}[/tex]

Start by multiplying both sides by t

[tex]v(t) = \frac{d}{t}(t)\\\\vt = d[/tex]

Then divide both sides by v.

[tex]vt\frac{1}{v} = d/v\\ \\t = \frac{d}{v}[/tex]

Now that you've isolated for time, sub in your values and calculate.

[tex]t = \frac{d}{v} = \frac{1800km}{45km/h} = 40 h[/tex]

The wavelength of a wave that has a frequency of 2.70X102 Hz and is moving through copper at 3560 m/s is 13.19m.

The wavelength of a wave can be calculated using the following formula:

λ = v/f

Where;

According to this question, a wave has a frequency of 2.70X10² Hz and is moving through copper at 3560 m/s. The wavelength is calculated as follows:

λ = 3560/270

λ = 13.19m

Therefore, the wavelength of a wave that has a frequency of 2.70X102 Hz and is moving through copper at 3560 m/s is 13.19m.

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(a) When the voltage increases, the electric field increases, and vice versa.

(b) When the distance of the charge increases, the electric field strength decreases, and vice versa.

The direction of the electric field depends on the direction of the positive charge, electric field is always directed opposite to positive charge.

The potential of a unit charge is the product of the electric field strength and the distance of the charge.

V = Ed

E = V/d

Thus, when the voltage increases, the electric field increases, and when the voltage decreases, the electric field decreases.

Also, when the distance of the charge increases, the electric field strength decreases, and the distance decreases, the electric field strength increases.

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Answer: it is chemical .

Explanation: because chemical change that results in the formation of new chemical substances. During the sun tanning, both vitamin D and melanin are produced. your welcome <3 .

Answer:

Speed Formula:

[tex]s = \frac{d}{t} [/tex]

Answer:

Lightning can be described by the flow of electric charges between the cloud and the ground.

Work done by a force is given as the product of force and the distance moved by the force.

Work done is the product of force and the distance moved by the the force.

Thus, distance required by the 100 N force is given as:

Distance = 1000/100 = 10 m

Distance to be moved is 10 m.

Force applied = work done/ distance

Force applied by the hoist = 500/2

Force applied by the hoist = 250 N

Distance moved in one push-up = 25 cm = 0.25 m

Work done by the athlete after one push-up = 250 × 0.25 m

Work done by the athlete = 62.5 J

Distance moved by the force = 0 m

Work done = 500 × 0 = 0 N

Therefore, for work to be done, force has to move a distance.

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The lens parameter that enables us to brighten an image is called" Refractive Index"

Refractive index of a material is a dimensionless number that describes how fast light travels through the material. Refractive Index is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density.

Therefore, refractive index is the lens parameter that enables us to brighten an image.

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Answer:

The correct answer is DIAMETER. Just took the quiz

Explanation

This is the photoelectric effect, and it is best explained by the particle model of light.

The photoelectric effect refers to the emission of negatively charged particles and electromagnetic radiation that hits an object.

The photoelectric effect shows how electrons can be released from a given object when this material is absorbing electromagnetic radiation.

The photoelectric effect is a fundamental piece of evidence for understanding the nature of light particles.

Learn more about the photoelectric effect here:

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Answer:

100 m/s

Explanation:

here we use the wave equation which states that the velocity is equal to the product of the frequency and the wavelength.

so v = 50 × 2

v = 100 m/s

Answer:

Mitochondria and chloroplast are organelles found in a plant cell. However, chloroplast is absent in an animal but mitochondria is found in both. Mitochondria generates energy for the cell in the form of ATP using oxygen and nutrients. Chloroplast is the site for photosynthesis in a plant cell.

Explanation:

The center of mass of a system acted on only by internal forces cannot accelerate. without friction a car cannot move. This is a consequence of Newton's third law

Answer:

Beta Particles

Explanation:

Answer:

W = F * S     one does not know the work performed because one does not know what force produced the resulting work. Neither can one calculate the power required because P = W / t  (work / time)

One only knows the distance and the time but not the force required.

Answer:

No. 1 is the correct answer.

Explanation:

The natural resources which deplets after long and continious use and are unable to be recreated/ takes a lot of time to renew are non renewable resources

Answer:

When you're talking on a cell phone, it converts your voice into a signal that is transmitted via radio waves to the nearest cell tower. The cell tower then relays the radio wave back to the person you're speaking to, converting it first to a signal and then back to sound again.

Explanation:

no explanation for you

but the answer is in the top!

Explanation:

I hope this helps, you can ask any questions for clarification

Answer:

20.4 minutes

Explanation:

5000 m / (4 m/s) = 1250 seconds  

   1250 seconds / 60 seconds/minute = ~ 20.4 minutes

Time taken by Koto during her trip is (a) 18.5 minutes.  

The distance travelled by Koto = 5000 meters

Koto's average velocity = 4.5 meters/second

To calculate time of Koto's trip following formulae is used:

Time = Distance/Velcoity

Time = 5000 meters/4.5 meters*[tex]Seconds^{-1}[/tex]

Time = 1111.11 seconds or 18.5 minutes

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Answer:

i honestly do not know the awnser , im just setting up my brainly account

Answer:

Q)32) What is the unit of intensity of sound

Ans)Decibel

Q)33) Relate amplitude and distance to the intensity and loudness of sound

Ans)The average amount of energy passing through a unit area per unit of time in a specified direction is called the intensity of the wave. As the amplitude of the sound wave increases, the intensity of the sound increases. (i can't find the answer for distance and loudness i can't find it on g....o...o....g....l.....e and my textbook u will have to search it on ur own sorry)

Q)34) What is the pitch of sound

Pitch is the rise and fall of our voice when we speak. It is the characteristic of sound by which we can distinguish the sounds of the same loudness. Types: Pitch is generally of two types, high pitch and low pitch. High Pitch: The higher the frequency of the sound, the higher will be the pitch.

Q)35) How is pitch of sound related to its frequency of sound waves?

The sensation of a frequency is commonly referred to as the pitch of a sound. The pitch of the sound we hear depends on the frequency of the sound wave. A high frequency sound wave has a high pitch, and a low frequency sound has a low pitch.

Q)36) Define the Doppler effect?

The apparent change in the frequency of sound due to the relative motion between the source and the observer is called the Doppler effect.

Q)37) Explain why the doppler effect occurs

The Doppler effect, or Doppler shift, occurs when the movement of an observer relative to a source (or vice versa) causes a change in wavelength or frequency.

Sorry i can't find the last one i will try to search it afterwards

The hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).

The second law of thermodynamics states that, hot things always cool unless you do something to stop them. Or the total entropy of an isolated system can never decrease.

In other words, not all heat energy can be converted into work in a cyclic process.

Therefore, we can conclude that when the woman returns, the hot summer cottage she left in September will still be hot when she returns in June as long as no one enters it (Isolated).

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Answer:

velocity

Explanation:

when a speed is given with a direction it is velocity

Answer:

Velocity

Explanation:

Velocity is the rate, and direction of an objects movement.

Speed is the rate of and objects movement, no certain direction.

Acceleration is the rate when velocity changes over time, it can both increase and decrease, and it has both speed and direction.

I hope this helps! Have a great day!

Your Murderer~

Answer:

The gravitational potential energy it had from being above the ground is converted to kinetic energy as the rock falls. As kinetic energy increases, the velocity of the rock will also increase.

Explanation:

Answer:  i thinks Its C

Explanation: