Science question, can someone please help ? I’ll give brainliest !!

Answer:

5.83

Explanation:

Divide the distance by velocity

Answer:

Explanation:

The formula for Kinetic Energy is

[tex]KE=\frac{1}{2}mv^2[/tex]. Filling in:

[tex]KE=\frac{1}{2}(1200)(20)^2[/tex] It looks like we only need 1 significant digit here but I'll give you 2 and you can round how you want.

KE = 2.4 × 10⁵ J

Answer:

0.49m

Explanation:

So you need to change the original equation for finding fields to find distance, and then just plug in the numbers

Which equals 0.49meters

Also it was right on Acellus :)

Hope this helps

Explanation:

Use Ohm's Law

V / R = I

I = 5A

V = 110V

R =?

Solve for R

if you need further help let me know

Answer:

gravity

Explanation:

Answer:

false

Explanation:

Answer:

true

Explanation:

Space is not a medium. and we can not her anything in space. therefore you need a medium in order to hear sound waves.

Answer:

The acceleration is 1 cm/s^2.

Explanation:

The acceleration is defined as the rate of change of velocity.

Here, initial velocity, u = 3/1 = 3 cm/s

final velocity, v = 4/1 = 4 cm/s

time, t = 1 s

Let the acceleration is a.  

Use first equation of motion

v =  u + at

4 = 3 + 1 x a

a = 1 cm/s^2

Answer:

B. Water Cycle

Explanation:

Answer:

B

Explanation:

Answer:

B. C

Explanation:

took the test :V

Answer:

amount of charge on the source charge

Answer:

65 deg C = 35 deg C below boiling

35 deg C = 35 * 9 deg F / 5 deg c = 63 below boiling deg F

(1 deg C = 9/5 deg F)

212 - 63 = 149

So 65 deg C = 149 deg F

Not sure exactly what's wanted, but

212 deg F   =     boiling

65 deg C = 149 deg F

Check:  65 * 9/5 + 32 = 149       as found above

Answer:

65 deg C = 35 deg C below boiling

35 deg C = 35 * 9 deg F / 5 deg c = 63 below boiling deg F

(1 deg C = 9/5 deg F)

212 - 63 = 149

So 65 deg C = 149 deg F

Not sure exactly what's wanted, but

212 deg F   =     boiling

65 deg C = 149 deg F

Check:  65 * 9/5 + 32 = 149       as found above

Explanation:

yeah i did, hope you understand

Answer:

13. (A) 20°

14. (D) 65°

15. (A) 0 m/s

Answer:

B, A, E, D, C

Explanation:

If the arrow points to the right, then the force is positive.

If the arrow points to the left, then the force is negative.

Also, remember that the force does not relate (necessarily) to the mass, so the different blocks having different masses is not an important factor in this problem.

Let's find the force in each block.

A)

Here we have a positive force of 3N and a negative force of 1N

Then the net force (the sum of all the forces) is:

F = 3N  - 1N = 2N

B)

Here we have two positive forces, one of 1N and other that I cant see, I guess that it is 3N

Then the net force is:

F = 1N + 3N = 4N

C)

Here we have two negative forces of 2N

Then the net force is:

F = - 2N + ( - 2N) = -4N

D)

Here we have a single force of 2N that is negative, then the net force is:

F = -2N

E)

Here we have a negative force of 3N and a positive force of 2N

then the net force is:

F = -3N + 2N = -1N

Then, the order of greatest to least (from positive to negative) is:

B, A, E, D, C

Answer:

rolling friction is the lady in the forest

static friction is the man pushing the fridge

sliding friction is the snow kid

and fluid fraction is the bird I'm pretty sure

Answer:

The answer is "telescopes".

Explanation:

Throughout ancient times, astronomical observatories have indeed been available, and so many historical locations were reserved for astronomical observations. All contemporary astronomers lacked within those older telescopes were lenses until 1610. A telescope is indeed an instrument used to view far-off objects. Telescopes often are being used to look at planets and stars.

Answer:

21.582 Newtons

Explanation:

The weight of an object on Earth is equal to W=9.81M where M is the mass of the object and the acceleration due to gravity is 9.81 m/s^2. Therefore, the weight of the book on the earth is W=9.81(2.2)=21.582N, or 21.582 Newtons

Answer :light

Explanation:  

A television set is another device that operates by the transformation of energy. An electrical beam from the back of the television tube strikes a thin layer of chemicals on the television screen, causing them to glow. In this case, electrical energy is converted into light.

Answer:

10.

parabolic

11.

Entirely horizontal

12.

45°

Answer:

When object falls freely we can say

its initial speed will be ZERO

and its acceleration due to gravity must be

a = g = 9.8 m/s^2a=g=9.8m/s2

Now we need to find the distance of free fall in 3 s of time

So here we will use kinematics

y = v* t + \frac{1}{2} at^2y=v∗t+21at2

now we will plug in all values in it

y = 0 + \frac{1}{2}* 9.8 * 3^2y=0+21∗9.8∗32

y = 44.1 my=44.1m

So it will fall by total distance of 44.1 m

Answer:

A). Increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object.

Explanation:

The two objects possessing opposite or unlike charges attract one another due to the electromagnetic force between the electrons, as well as, protons in order to develop ionic lattices.

As per the question, the objects having unlike charges would attract one another more when we 'escalate the positive charge of the object having a positive charge and enhance the negative charge of the object possessing negative charge.' This will lead the atoms that are losing electrons to be positively(+ve) charged and the atoms gaining electrons to be negatively

(-ve) charged. Thus, the electromagnetic force among them increases and a stronger ionic network develops leading them to attract each other more. Hence, option A is the correct answer.

Answer:

The person above me is wrong the answer is actually B

Explanation:

I put his/her answer and got it wrong and it showed me theat the answer is b not a

Answer:

Waves are disorders that travel through a fluid medium. Several simple wave features include frequency, period, wavelength, and amplitude.

Explanation:

Answer:

Explanation:

A compass always (or usually always) points to the magnetic north. If you came in from the south east and got lost, it will point north and you can adjust the way you travel by going 90 off of where the compass points. Keep walking on that line until you hit a place that you recognize and there is no more need for the compass.

Answer: The first thing you have to do is locate east on your compass housing. Turn your compass until you see that east lines up directly with your direction of travel arrow. Quite simply, that is the direction you want to walk. You can do this for any direction.

Explanation:

= Total Distance/Total time

= 30/3

= 10 km/h

Average speed = Total distance travelled/time taken

= 50/6

= 8.3 km/h

Answer:

Let N0 be the initial atoms of Be11

N0 / 2^1 = N0 / 2  Number of Be11 after 1 half-life

N0 / 2^2 = N0/ 4   Number of Be11 after 2 half-lives

30/13.81 = 2.17 half lives

N0 / 2^2.17 = N0 / 4.51 = .222 N0 or 22.2 % of atoms remain

The percentage of the initial sample that will remain after 30.0 s is 22.2 % of atoms remain.

A half of existence is the duration required for something to reduce in size by half. The phrase is most frequently used in reference to radioactive decay, which takes place as unstable atomic particles weaken. There are 29 known factors that can operate in this way.

Every chemical has a unique half-life. Since carbon-10, for instance, has a half-life of only 19 seconds, it is impossible for this isotope to be found in nature.

Let No of the initial atoms of Beryllium-11

No / 2¹ = N0 / 2  Number of Be11 after 1 half-life

No / 2² = N0/ 4   Number of Be11 after 2 half-lives

30 / 13.81 = 2.17 half lives

No / 2²·¹⁷ = N0 / 4.51 = .222 N0 or 22.2 % of atoms remain

Therefore, the percentage of the initial sample will remain after 30.0 s is 22.2 %.

To learn more about half-life, refer to the link:

https://brainly.com/question/16387602

#SPJ2

Answer:

1. Yes

2. Yes

3. 292 joules

4. 90 watts

5. By increasing the force

Explanation:

Have a wonderful day :)

Answer:

false gravity is not considered matter

Explanation:

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