Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5 resistor,
an 8 resistor, and a 12 resistor, and a plug key, ammeter, all connected in series.

Answer:

the answer is A. working against a force

Explanation:

Answer:

A. working against a force

Explanation:

Answer:

a

     t =  1.235 s

b

  [tex]h_{max} = 2.55 \ m[/tex]

c

 [tex]v = -7.10 m/s[/tex]

Explanation:

From the question we are told that

    The  initial  velocity is [tex]u = 5.0 \ m/s[/tex]

      The  take of height is  [tex]h = -1.30 \ m[/tex]

The negative sign show that the height is on the negative y-axis when the take off point is consider as the origin

Generally from the kinematic equation we have that

       [tex]s = ut + \frac{1}{2}at^2[/tex]

=>     [tex]-1.30 = 5.0 t + \frac{1}{2} (-9.8)t^2[/tex]

Here g is negative given that the swimmers jump motion is against gravity

    [tex]4.9t^2 - 5t - 1.30[/tex]

solving using quadratic formula we obtain that

    t =  1.235 s

Generally the highest point is mathematically evaluated as

      [tex]h_{max} = \frac{v^2 - u^2 }{2 * (-g) }[/tex]

Here v =  0 m/s since the velocity at the highest point is 0

   [tex]h_{max} = \frac{0^2 - 5^2 }{2 * (-9.8) }[/tex]

   [tex]h_{max} = 2.55 \ m[/tex]

Generally her velocity when the feet hits the water is mathematically evaluated from kinematic equation as

     [tex]v = \pm \sqrt{ u^2 + 2 (-g) * (-h)}[/tex]

      [tex]v = -7.10 m/s[/tex]

The  negative value of the velocity is selected because the velocity is on the negative y-axis

Answer:

0.6

Explanation:

Answer:

Umm I think because the sun is too far away from the earth

hope it helps...

Because of the sound wave, the wave cant travel through the vacuum. Also theres no sound in space.

Answer:

there are many metals in the periodic table and all have different atomic number and mass

Explanation:

Explanation:

It is given that, a batter hits a pop-up to a fielder 93 m away, range of the projectile, R = 93 m

The ball remains in the air for 5.4 s, the time of flight is 5.4 s

Time of flight : [tex]T=\dfrac{2v\sin\theta}{g}[/tex]

[tex]5.4=\dfrac{2v\sin\theta}{g}\\\\v\sin\theta=\dfrac{5.4\times 9.8}{2}\\\\v\sin\theta=26.46[/tex]

Maximum height of the projectile : [tex]H=\dfrac{v^2\sin^2\theta}{2g}[/tex]

We need to find H.

So,

[tex]H=\dfrac{(v\sin\theta)^2}{2g}\\\\H=\dfrac{(26.46)^2}{2\times 9.8}\\\\H=35.72\ m[/tex]

So, it will rise to a height of 35.72 m.

Answer:

does not have a definite shape or volume=gas

has a definite volume but has no shape=liquid

has a definite shape and volume=solid

changes to liquid on heating=melting

changes to solid on cooling=freezes

changes to liquid on cooling=condensation

Answer

ANSWER WITH FULL EXPLANATION

If a speed is given  km/h, then the formula to convert the speed from km/h to m/s is  

km/h = m/s

In other words, if you want to convert the given speed from km/h to m/s, then multiply the given number by  and put "m/s" after it.  

The speed of a car is 72 km/h.  

Converting the speed into m/s

72 km/h =  m/s = 20 m/s

∴ The speed of the car (expressed in m/s) is 20 m/s.

SHORT ANSWER

1km/h=5/18m/s

72km/h=72×5/18m/s

=4×5m/s

=20m/s.

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Answer:

Greater than

Explanation:

Distance is the length of the path traveled.  Displacement is the difference between the final position and initial position.

Speed = distance / time

Velocity = displacement / time

Since you return to your starting point, your displacement is 0 m, so your average velocity is 0 m/s.  Therefore, your average speed is greater than your average velocity.

Speed ls a function of distance and time, while velocity is a function of displacement and time. Since the rider returned to his starting point, then the magnitude of the average speed is greater than the magnitude of the average velocity

The total distance traveled will be sum of the 'to' and 'fro' distance.

The total displacement will be 0 (Final position - Initial position) ; since the rider returned to his starting position.

This means the average velocity will be 0 while the average speed will have a value greater than 0.

Therefore, the average speed will be greater.

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Answer:

100 L

Explanation:

10 dL =  1 L

Answer:

9.8 m/s

Explanation:

Distance Traveled = 98 m

Total Time = 10 s

Average Speed = Total Distance/Total Time

= 98/10

= 9.8 m/s

Hope this helped...

Answer:

The participants who were given the coffee

Explanation:

This is the group which the experiment is centered or focused around in order to achieve a result of derive informations regarding their exposure to some things.

Dr. Sampson is studying the effects of caffeine on hunger which means he hypothesizes that people who ingest more caffeine experience less hunger pangs throughout the day. He designs a study where one group of participants is given caffeine throughout the day, and the other group is not allowed to have any caffeine. All this talks about The participants who were given the coffee being the experimental group

Answer:

He can lift on the earth is 60 kg

Answer:

A balance

Explanation:

Scientists measure mass with a balance, such as a triple beam balance or electronic balance. In science, the volume of a liquid might be measured with a graduated cylinder.

Answer: Scientists often measure mass with a balance

Hope this helps

Answer:

σ = 1.09 mm

Explanation:

Step 1: Identify the given parameters

rod diameter = 20 mm

stiffness constant (k) = 55 MN/m = 55X10⁶N/m

applied force (f) = 60 KN = 60 X 10³N

young modulus (E) = 200 Gpa = 200 X 10⁹pa

Step 2: calculate length of the rod, L

K = \frac{A*E}{L}K=

L

A∗E

L = \frac{A*E}{K}L=

K

A∗E

A=\frac{\pi d^{2}}{4}A=

4

πd

2

d = 20-mm = 0.02 m

A=\frac{\pi (0.02)^{2}}{4}A=

4

π(0.02)

2

A = 0.0003 m²

L = \frac{A*E}{K}L=

K

A∗E

L = \frac{(0.0003142)*(200X10^9)}{55X10^6}L=

55X10

6

(0.0003142)∗(200X10

9

)

L = 1.14 m

Step 3: calculate the displacement of the rod, σ

\sigma = \frac{F*L}{A*E}σ=

A∗E

F∗L

\sigma = \frac{(60X10^3)*(1.14)}{(0.0003142)*(200X10^9)}σ=

(0.0003142)∗(200X10

9

)

(60X10

3

)∗(1.14)

σ = 0.00109 m

σ = 1.09 mm

Therefore, the displacement at the end of A is 1.09 mm

Answer:

110

Explanation:

to find neutrons we have to subtract the atomic number from the atomic mass.

atomic mass = 183.84

atomic no = 74

183.84 - 74 = 109.84

round off = 110

Answer:

110

Explanation:

edg. 2020

Answer:

The displacement of the boat is 7.41 m

Explanation:

Given;

initial velocity of the motorboat, u = 6.5 m/s west

final velocity of the motorboat, v = 1.5 m/s west

acceleration of the motorboat, a = -2.7 m/s² east

The displacement of the boat is given by;

v² = u² + 2ad

where;

d is the displacement of the motorboat

1.5² = 6.5² + 2(-2.7)d

1.5² -  6.5² = -5.4d

-40 = -5.4d

d = (40) / 5.4

d = 7.41 m

Therefore, the displacement of the boat is 7.41 m

Answer:

[tex]F=\frac{mgh-\frac{1}{2} mv^2}{d}[/tex]

Explanation:

Step 1: Write out equation

[tex]\frac{1}{2} mv^2+Fd=mgh[/tex]

Step 2: Subtract FD on both sides

[tex]\frac{1}{2} mv^2=mgh-Fd[/tex]

Step 3: Subtract mgh on both sides

[tex]\frac{1}{2} mv^2-mgh=-Fd[/tex]

Step 4: Divide both sides by -d

[tex]\frac{\frac{1}{2} mv^2-mgh}{-d} =F[/tex]

Step 5: Rewrite

[tex]F=\frac{mgh-\frac{1}{2} mv^2}{d}[/tex]

Answer:

The correct option is;

C. Repeating an experiment to verify results

Explanation:

A scientific theory is a statement explaining an observed natural phenomenon which can be simulated for verification ensuring that all protocols of the scientific method of investigation are observed.

By repeating the experiment under particular conditions such as through verification of data from direct observation such as in astronomy, a scientific theory can be improved by pointing out the natural behavior of the phenomenon to better clarify the assumptions made in the theory.

Answer:

Developing new technologies.

Explanation:

Explanation:

Total displacement =30+20=50 Km

Average velocity =displacement /time

V=50/1.5=33.33km/hr

Answer:

Total Displacement: 10

Average velocity, closest option is 10.

Explanation:

30-20=10

Answer:

v = 11.2 m/s

Explanation:

A stone is dropped near the lunar surface and falls freely for 7 seconds. The acceleration of lunar gravity is 1.6 m / s², what speed will it reach?

Given that,

The acceleration due to the gravity of lunar gravity is 1.6 m/s²

A stone is dropped near the lunar surface and falls freely for 7 seconds.

We need to find the speed with which it reach.

The initial velocity of the stone will be 0 as it was at rest.

Using equation of kinematics v=u+at

[tex]v=1.6\times 7\\\\v=11.2\ m/s[/tex]

So, the stone will reach with a speed of 11.2 m/s

Answer:

Because wells are deep and a pulley can scoop up the water with a bucket and bring it back to the surface

Answer: please find the answer in the explanation

Explanation:

Velocity is the distance covered in a specific direction per time taken.

And in velocity, we have final velocity V and initial velocity U.

The definition of average velocity is:

Average velocity = (V + U)/2

Since velocity involves direction, if the initial velocity U is of the same magnitude as the final velocity V and both are of opposite direction. Then,

Average velocity = (-U + V)/2

Since they are of the same magnitude,

V = U.

Therefore,

Average velocity = (-U + U)/2 = 0

Answer:

Second is a unit for measuring time. As the scientist usually wants precision, is needed that the units are well defined and that the unit is exactly the same for everyone.

So, if for example, (and for some weird reason) you do not have access to a precise clock to measure one second, you can use the actual value (by definition) of the second to find the exact length of a second.

So, resuming is used for consistency.

We have that The second was derive from a number that is

[tex]\frac{1}{86400}[/tex] of a solar day(24hours)

it is important to note that the seconds was discovered or established before  clocks

Now, seconds are derived from an actual value and not an arbitrary one.

The second was derive from a number that is [tex]\frac{1}{86400}[/tex] of a solar day(24hours)

The second was designed to make the its value as close as possible to this number in the modern day seconds

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Not even a week. If you looking for a number it would be 0.00051091. Again not even a week.

Answer:

0.000510913 weeks...

Not even one week.

Answer: University/college

Explanation:

A psychologist is someone who studies the cognitive, emotional, and mental states of people by observing and recording how people relate with each other and their environment.

Most psychologists are found in universities in order to help students who have emotional issues or seeking answers to certain questions.

Answer:

The person has no displacement

Explanation:

The given parameters are

The location of the person = The equator

The distance covered in one revolution = Total distance around the body

The total distance around the Earth = The circumference of the Earth = 40.075 kilometres

The total distance moved by the person standing at the equator during the Earths complete revolution = 40,075 kilometres

The initial location of the person in relation to a fixed point in space outside Earth at the start of the revolution = x km

The final location of the person in relation to the fixed point in space outside Earth at the completion of the revolution = x km

The displacement = Change in position = Final location - Initial location  

∴ The displacement = x km - x km = 0 km.

Answer:

Explanation:

weight is wrong.........weight is usually used for the heaviness in a body,,,,,,,we sell food giving the information that how many mass it contains or how many mass of this food do you want!

i hope you find it right!!!!!!!

Answer:

It should be mass instead of weight

Explanation:

I must use mass or dozen for bananas

Answer:

I think it is the third one

Explanation:

Everything about it is flipped

The electromagnets with poles that are reversed from the electromagnet  is according to image C.

A substance which is negative charged at one end and positive charged at another end creating the magnetic field around it.

A bar is a magnet which can attract the particle which are charged. It has two poles North and South.

The electromagnet is find in the electric motor. In the motor, loop made up of conductor is rotated by the effect of magnetic field of permanent magnet.

An electromagnet is a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.

When the poles are reversed, then the direction of current flow is also reversed.

Thus, the correct option is C.

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