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Answer:

7.5 m

Explanation:

speed = distance/time

=> speed × time = distance

=> (3 m/s) × (2.5 s) = distance

=> 7.5 m = distance

Answer:

Answer:

Explanation:

It means that out of 20 students, 3 males and 1 female were digital screen addicts because they were getting dangerous amount of blue light. Thus couldn't feel calming sensation that a human feels while seeing blue light. The rest students were getting balanced blue light. So they were getting relaxed feeling while being exposed to blue light.

Answer:

Below

Explanation:

You can use this formula to find the average speed/velocity

     speed = displacement / change in time

Plugging our values in....

     speed = 21.0 m / 2.00 s

                = 10.5 m/s

Hope this helps! Best of luck <3

The average speed of a soccer ball is 10.5 m/s.

Speed is defined as the ratio of the distance moved by the object at a particular time. The unit of speed is measured in the meter per second, miles per hour, etc. The speed of an object is a scalar quantity and does not require any direction to represent it. It only requires magnitude to represent it.

Average velocity is defined as the sum of all the distances traveled by an object to the time taken by the object to cover the total distance.

Given that a soccer ball is kicked horizontally. its average speed if its displacement is 21.0 m after 2.00 seconds will be calculated as below:-

Speed = displacement / change in time

Speed = 21.0 m / 2.00 s

Speed = 10.5 m/s

Therefore,  the average speed of a soccer ball is 10.5 m/s.

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Answer:

si

Explanation:

Answer:

element name = neon

no of proton = 10

no. if neutron = 9

atomic no. = 10

atomic weight = 20.17179u

it lies in group 18 and period 2

it is nonmetal because it is a noble gas .

hope this helped you ☺️

Answer:

finding the volume of an irregular shape

Answer:

Explanation:

moon is 1.6metre per second and earth is 9.8 meters per second square

Have a  nice day bye

The expression for the position of the particle in terms of velocity and time is given as, s = vt

The given expression:

To find:

Determine the value of the constants from second equation of motion given as:

[tex]s = vt + \frac{1}{2}at^2\\\\substitute \ the \ given \ value \ of \ a\\\\s = vt + \frac{1}{2}(c_1 + c_2v)t^2\\\\s = vt + \frac{1}{2} c_1 t^2 + \frac{1}{2} c_2vt^2\\\\divide \ through\ by \ t^2\\\\\frac{s}{t^2} = \frac{v}{t} + \frac{1}{2} c_1 + \frac{1}{2} c_2v\\\\multiply \ through \ by \ 2\\\\\frac{2s}{t^2} = \frac{2v}{t} + c_1 + c_2v\\\\when \ t = 0\\\\0 = 0 +c_1 + c_2v\\\\c_1 + c_2v = 0\\\\from \ the \ original \ equation;\\\\s = vt + \frac{1}{2} (c_1 + c_2v)t^2\\\\[/tex]

[tex]s = vt + \frac{1}{2}(0)^2\\\\s = vt[/tex]

Thus, the expression for the position of the particle in terms of velocity and time is given as, s = vt

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Answer:

Explanation:

measurement is necessary to express the amount or rate of any physical quantity

Answer:

constructive

alpitude

Answer:

Muscular and vigorous

Explanation:

Big gains only

Answer:Date: 08/21/21

Warm-up: 5 minutes

Cool-down: 1 minute

Type of Activity: Muscular

Description of Activity and Time: push up, and repetitions 10 minutes

Intensity Level: Moderate

Total Time:16 minutes

Explanation:

Answer:12.5 km

Explanation:

0.5=1/2

25 x 1/2 = 12.5 (25 ÷ 2 = 12.5)

Answer:

12.5 km

Explanation:

Distance = Speed x Time

               = 25 x 0.5

               = 12.5 km

ALL colors are in the visible spectrum.

"Color" is a word we use to describe light that our eyes can detect.  If the light has a "color", that means we can see it, and somebody gave it a name.  If we can't see it, then we don't have a "color" to describe it.

Every color that has ever been perceived by human eyes is present in the humanly-visible spectrum, except "black".

There are at least hundreds of them. Probably thousands.  Maybe millions.

The Colours that are included in visible spectrum are - 7 Colours namely :

Explanation:

The seven Colours of white light are Violet, indigo , blue, green , yellow, orange and red . It is remembered by the acronym - VIBGYOR.

Explanation:

1.The parts of the ear include:

External or outer ear, consisting of: Pinna or auricle. This is the outside part of the ear. ...

2.Tympanic membrane (eardrum). The tympanic membrane divides the external ear from the middle ear.

3.Middle ear (tympanic cavity) , consisting of: Ossicles. ...

4.Inner ear , consisting of: Cochlea.

Explanation:

The major parts of ear are:-

1) Outer ear

2) Middle ear

3) Inner ear

Answer:

time taken to reach maximum height is 2.548 sec and Maximum height is 31.855 m

Explanation:

Initial velocity U= 25 m/s

at maximum height velocity, V= 0 m/s

Let the time taken to reach maximum height be t and maximum height be H.

V= U-gt

so 25-9.81.t=0

therefore t= 25/9.81  = 2.548 sec

Now,

H= Ut-1/2(gt^2)

 =25x2.548-0.5x9.81x(2.548^2)

 =31.855 m

                                              Thank you

Answer:

Bismuth And Nitrogen

Explanation:

Because they have the same number of Valence Electrons

Answer:

There is nothing above oxygen but beneath there is sulfur as shown in the figure.

Answer:

As more and more resistors are added in parallel to a circuit, the equivalent resistance of the circuit decreases and the total current of the circuit increases. Adding more resistors in parallel is equivalent to providing more branches through which charge can flow.

Answer:

a.

[tex] {v}^{2} = {u}^{2} + 2as \\ v = \sqrt{ {u}^{2} + 2as} [/tex]

b.

[tex] {v}^{2} = {u}^{2} + 2as \\ {u}^{2} = {v}^{2} - 2as \\ u = \sqrt{ {v}^{2} - 2as} [/tex]

c.

[tex] {v}^{2} = {u}^{2} + 2as \\ 2as = {v}^{2} - {u}^{2} \\ a = \frac{ {v}^{2} - {u}^{2} }{2s} \\ \\ a = \frac{ {v}^{2} }{2s} - \frac{ {u}^{2} }{2s} [/tex]

d.

[tex] {v}^{2} = {u}^{2} + 2as \\ 2as = {v}^{2} - {u}^{2} \\ s= \frac{ {v}^{2} - {u}^{2} }{2a} \\ \\ s = \frac{ {v}^{2} }{2a} - \frac{ {u}^{2} }{2a} [/tex]

I hope I helped you^_^

Answer:

1 1/2 hours. for Karen to catch Jen.

Explanation:

Karen needs to make up 22.5 km which is the distance Jen travels in 1/2 hour.

The distance where they meet must be equal from the starting point.

Jen

Jen is out 1/2 hour longer.

Let the Karen's time  = t

d = r * t

d = 45 * (t + 1/2 hour)

Karen

d = 60 * t

The distances are equal

so

Meeting time

45*(t + 1/2 hour) = 60 * t

45t + 22.5 = 60t                   Subtract 45t from both sides

22.5 = 15t                              Divide by 15

t = 22.5 / 15

t = 1 1/2 hours = 1.5 hours.

Now you have to interpret the results.

Remember that Jen has travelled 1/2 hour more than Karen

Her time is 2  hours.

Karen's time is 1.5 hours.

Jen travels 2 hours which is 2 * 45 = 90 miles

Karen travels 1 1/2 hours which is 1.5 * 60 = 90 miles

Answer:

it's true...

Explanation:

hope it helps you

Explanation:

1. Mass of an object

2. Distance between the objects

Answer:

When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.

Explanation:

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Answer:

It C 100% bc i alrweady learn this

Answer:

E(efficiency) = E(out) / E(in)

.4 = 400 J / E (in)

E (in) = 1000 J

Heat input : 1000J

The efficiency of a heat engine  is defined as the ratio of work done by the heat engine absorbed per cycle.

Given : work output = 400 J

          Efficiency = 40 % = 0.4

          heat input = ?

Efficiency = work output / heat input

                0.4 = 400/heat input  

heat input : 1000J

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Displacement (s)=25m

Time taken (t)=5 sec

Average Velocity (v)= ?

now,

v= d÷ t

v= 25m÷ 5

v= 5m/s

Answer:

[tex]displacement= 25m \\ time = 5 \: sec \\ avarage \: velocity = \frac{displacement}{time} \\ = \frac{25}{5} = 5 \frac{m}{sec} \\ thank \: you[/tex]

Answer:

c. is the answer i think

Explanation:

Answer:

d. is the the naswer I'm sure with it and not much sure but it would be ryt option