(b) When the taps are opened, water flows in the pipe for some time. The diagram shows the final water level in container (i) Complete the diagram to show the final water level in container B.
(ii) Explain why the water starts to flow and then stops.​

Answer:

Gravity

Explanation:

Power developed by a model rocket engine will be 73.3 watts. Power is the ratio of the work done or the enrgy to the time period.

The rate of the work done is called the power output. It is denoted by P.Its unit of a watt.

The given data in the problem is;

E is the energy = 66 J

P is the power output =?

t is the time period = 0.9 sec

The power output is given as;

[tex]\rm P = \frac{E}{t} \\\\ \rm P = \frac{66}{0.9} \\\\ \rm P = 73.3 \ watt[/tex]

Hence power developed by a model rocket engine will be 73.3 watts.

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Answer:

wavelength and frequency

Explanation:

wavelength is the distance between waves while frequency is the number of times in which the wave occurs.

Since the rod is held perpendicular to the direction of motion of the spaceship, the rod is 1.00 m long to an Earth observer.

To answer the question, we use the principle of length contraction in relativity.

The principle of length contraction states that the length of an object would only contraction when it is in the direction of motion.

So, since the 1.00 m long rod is in the spaceship is held perpendicular to the direction of motion of the spaceship, there is no length contraction and thus, an observer on the Earth measures the same length of 1.00 m.

So, Since the rod is held perpendicular to the direction of motion of the spaceship, the rod is 1.00 m long to an Earth observer.

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Answer:

its c - the migration of birds

Explanation:

i did it on study island

The given is:Mass – 2000 kg

The given is:Mass – 2000 kgInstantaneous speed – 10 meter per second

Step: 1K.E= 1/2mv^2

Where, K.E – Kinetic energy in joules:

m – Mass in kg

  v – Velocity or speed in meter per second

From the give,

m = 2000 kg

v = 10 m/s

Equation (1) becomes,

K.E= 1/2 (2000) (10)^2

= (0.5)(2000)(100)

= 100000

K.E = 100,000 Joules

The kinetic energy is 100,000 Joules, if a roller coaster of mass 2000 kg is rolling down a track with an instantaneous speed 10 m/s.

Answer:

its light traveled through space for 1 billion years to reach us

Explanation:

Answer:

A.

Explanation:

The answer should be A.

i apologize if it is incorrect-

I hope it helps! Have a great day!

Anygays-

What do you mean by electromagnetic induction ?

Discovery : -

A British scientist Michael Faraday and an American scientist Joseph Henry discovered the phenomenon of electromagnetic induction in 1831 independently.

Definition / Meaning : -

The production of electricity from magnetism is called electromagnetic induction.

Or ,

Electromagnetic induction is the phenomenon of the production of an induced current in a coil placed in a region where the magnet field changes with time

For Example : -

(i) If a bar magnet is moved in and out of coil of wire , even then an electric current is produced. This is an example of electromagnetic induction.

(ii) Another example , when a straight wire is moved up and down rapidly between the two poles of a horseshoe magnet , then an electric current is produced in the wire. This is also an example of electromagnetic induction .

Electromagnetic induction denotes to producing electricity using magnetic field or magnetism.

This is the process or phenomenon of production of induced induced current in a region where magnetism changes with respect to the time.

It was discovered by great scientist Michael Faraday.

Answer:

Look below.

Explanation:

1.) The resistance of a light bulb filament is effected by both length and cross-sectional area. Thicker wires have less resistance. A 120-Watt bulb has a greater current and a smaller resistance. Thus, a 120-Watt bulb must have a thicker filament than a 60-Watt bulb (assuming the lengths of the filaments are identical). We also think of lightbulbs in terms of their power ratings in watts. Let us compare a 25-W bulb with a 60-W bulb. Since both operate on the same voltage, the 60-W bulb must draw more current to have a greater power rating. Thus the 60-W bulb’s resistance must be lower than that of a 25-W bulb. If we increase voltage, we also increase power. For example, when a 25-W bulb that is designed to operate on 120 V is connected to 240 V, it briefly glows very brightly and then burns out. Precisely how are voltage, current, and resistance related to electric power?

2.) Energy transferred = 120 × 2 = 240 J. This equation can be rearranged to V = E ÷ Q. So voltage is energy transferred divided by charge.

3.) Power= Voltage × Current

4.) W=Pt

Answer:

8927.1 Pa

Explanation:

pressure = height x density of liquid x g

               = (91/100) x 1000 x 9.81

               = 8927.1 Pa

Answer:

5. 25 [kg].

Explanation:

1) the final ratio is:

m_20kg *g=m*g/cos37°; ⇒ m= m_20kg / cos37°;

2) answer is:

m=20/0.8=25 [kg].

Answer:

Good human ears can detect sound from about 50 Hz to about 20,000Hz (20 kHz); this can be called the audible range of frequencies.

so c.50 hertz

Explanation:

Hope it helps :)

Answer:

50 hertz

Explanation:

This is right

For a lunar eclipse to occur, the Sun, Earth, and Moon must be roughly aligned in a line. Otherwise, the Earth cannot cast a shadow on the Moon's surface and an eclipse cannot take place. When the Sun, Earth, and Moon come together in a straight line, a total lunar eclipse takes

Answer:

C

Explanation:

watt = j/sec     and work  = j    

so multiply   watt * sec to get  work

1000 j/sec  *  5 sec = 5000 j  = 5 x 10^3

[tex]\qquad \qquad \huge \pink {\sf{☁Answer☁}} \\ \\ [/tex]

[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✓

[tex]\sf{\:мѕнαcкεя\: ♪...}[/tex]

Answer:

I don't know

Explanation:

because I'm not smart

(a) The final angular velocity of the flywheel after 3 complete revolutions is 4.96 rad/s.

(b) The time taken for the flywheel to make 3 complete revolutions is 5.93 s.

The final angular velocity of the flywheel after 3 complete revolutions is determined by applying third kinematic equation as shown below;

θ = 2π (rad/rev) x (3 rev) = 18.85 rad

ωf² = ωi² + 2αθ

ωf² = (1.4)² + 2(0.6)(18.85)

ωf² = 24.58

ωf = √24.58

ωf = 4.96 rad/s

The time taken for the flywheel to make 3 complete revolutions is calculated as follows;

ωf = ωi + αt

t = (ωf  - ωi)/α

t = (4.96 - 1.4)/0.6

t = 5.93 s

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Answer:

Answer below in pic

I hope my answer helps you.

Answer:

I totally agree with what the person above me said.It is correct

Answer:

The answer should be light or other electromagnetic radiation

Explanation:

Such as x-rays or other things like that.

-Hope This Helps!

-Justin:)

Answer:

945 joules

Explanation:

the formula for kenetic energy is:

0.5 × m × v^2

where m is in (kg) ane (v) is in meter per second.

so we can just use the formula;

0.5 × 2.1 × 30^2

so the answer is 945 joules

Hi there!

Let's say that a series RL circuit is constructed, with the switch left open.

When the switch is closed, a current will start flowing in the circuit. The INCREASING current will go through the loops of the inductor, producing an INCREASING magnetic field and consequentially a magnetic flux through the inductor. (Use hand rules).

However, the inductor does NOT want to experience this increasing magnetic flux, so an emf in the OPPOSITE direction of the current will be produced to counteract the increasing flux. (The flux would also be in the opposite direction).

This is expressed with the equation:

[tex]\epsilon = -L \frac{di}{dt}[/tex]

ε = Back emf (V)
L = Inductance (H)

i = Current (A)
t = time (s)

With the negative sign, we can see that if the current of the circuit is INCREASING, the emf produced would be in the opposite direction.

Answer:

Sponges

Explanation:

It would be either sponges or flatworms.

I apologize if it is incorrect-
I hope it helps! Have a great day!

Anygays-

Answer:

E = h f      and since f = c / λ     we have E = h c / λ

Thus  λ = h c / E

Also, 1 ev = 1.6E-19 C

λ = 6.63E-34 * 3.0E8 / (1.6 * 1.6E-19)

λ = 6.63 * 3.0 / (1.6 * 1.6) * E-7

λ = 7.77E-7 = 777 nanometers

(B) is correct

Revolution and rotation are the terms that describe the different movements of the earth.

Our home planet is Earth. Earth and its moon, according to scientists, originated about the same period as the rest of the solar system.

That would have been around 4.5 billion years ago, according to scientists. Earth is the solar system's fifth-largest planet.

The rotation and revolution of the earth are two different movements. The movement of the earth on its axis is known as rotation.

Revolution is the movement of the earth around the sun in a fixed route or orbit. The earth's axis, which is an imaginary line, forms a 6612° angle with its orbital plane.

Hence revolution and rotation are the terms that describe the different movements of the earth.

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Answer:

The first vehicles fitted with an alternator was vehicles during WWll.

Chrysler Corporation fitted an alternator on the Valiant 1960 as standard equipment

Explanation:

Answer:

The first car fitted with an alternator, rather than a direct current dynamo was the 1960 Plymouth Valiant.

The wavelength and frequency of the sound in the string is greater than the wavelength and frequency of the sound in the air.

The wavelength and frequency of the sound is determined using the following formulas.

v = fλ

f = v/λ

λ = v/f

where;

f = 600/λ

λ = 600/f

f = 333/λ

λ = 333/f

Thus, the wavelength and frequency of the sound in the string is greater than the wavelength and frequency of the sound in the air.

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The energy transformation that is happening in this process is mechanical energy to chemical energy.

According to conservation of energy, energy can not be distroyed and cannot be created, but can only be transformed from one form to another.

The batteries of some flashlights can be charged by turning a handle. The energy transformation that is happening in this process is mechanical energy to chemical energy. The chemical energy will transform to electrical energy which will eventually transform to light energy.

The turning of the handle is mechanical and the energy in battery is chemical.

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