Study the image.
The image shows the electric field lines between two charged plates.
Which statement would be true for these plates?
Select one:
A. The right plate is neutral.

B. The right plate is positively charged.

C. The left plate is positively charged.

D. The left plate is neutral.

Answer:

[tex] \: [/tex]

Explanation:

Before converting , Let's recall this :

[tex] \: [/tex]

Now, Let's Convert it :

[tex] \\ \longrightarrow \qquad \sf \: 54km / hr \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1km}{1hr} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1000m}{3600s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54000 m}{3600s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{540\cancel{0 }\cancel{0} m}{36 \cancel{0 }\cancel{0}s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{540 m}{36s} \\ [/tex]

[tex] \\ \longrightarrow \qquad \frak{\pmb{ 15m /s}} \\ [/tex]

Practically yes

So

If mass is more output may come less so it affects the efficiency practically

But thepritically it doesn't

Answer:

Yes

Explanation:

Formula of motor efficiency

We know from simple physics that the energy of a body is directly proportional to its mass. Here, in the working of a motor, mass may not be involved directly, but the electrical energy required to provide a function will likely have more efficiency when working with lesser masses.

Answer:

240.1 m

Explanation:

Potential energy  ( mgh)  is fully converted to Kintetic energy ( 1/2 mv^2)

  equate them

mgh = 1/2 mv^2     divide by 'm'

gh = 1/2 v^2

9.8 h = 1/2 v^2

    19.6 h = v^2         v = sqrt ( 19.6h)     (as given)

                               68.6 = sqrt (19.6 h)     solve for h = 240.1 m

1. The length of the bridge is 360 m.

2. The speed of train in km/hr to cross the bridge in 24 s is 72 km/hr.

3. The length of the train when it cross the bridge in 36 seconds is 540 m.

What is speed?

Speed is the ratio of distance traveled and the time taken to cover that distance.

1.

The speed of train m/s is 54 x 5/18 = 15 m/s

The train crosses the bridge in 32 s, distance traveled by train will be

=32 x 15 =480m

The length of the bridge = (480 -120) =360 m

Thus, the length of the bridge is 360 m.

2.

Speed of train in m/s to cross the bridge in 24 s

= 480/24 = 20 m/s

Speed in km/hr =20 x 18/5 = 72 km/hr

Thus, Speed of train in km/hr to cross the bridge in 24 s is 72 km/hr.

3.

Speed of train in m/s =15 m/s

Train crosses the bridge in 36 s, then length of train will be

= 15 x 36m = 540m

Thus,  the length of the train when it cross the bridge in 36 seconds is 540 m

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Explanation:

Transmutation means change in neutron numbers u

Like for example

When Potassium (N=19 ) goes through beta decay it forms (N=20)

Here no change in neutrons (Same 28)

So no trnasmutaions.

Option B

The half-life of the pennies in experiment 1 and 2 will be the time it takes for half the pennies to fall off after shaking.

Half-Life is the time required for half the amount one a given substance to disappear or decay.

The half-lives of substances are usually constant values.

For example, the Half-Life of radioactive carbon-14 is 5700 years.

Therefore, the half-life of the pennies in experiment one and two will be the time it takes for half the pennies to fall off after shaking.

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Answer:

D

Explanation:

Components that make up our asteroid belt between mars and jupiter

Elliptical galaxies could be formed by the collision and merging of two spiral galaxies.

Galaxy is the huge collection of stars, interstellar gases, dust particles, stones. Galaxies tend to come in two shapes such as spirals and ellipticals.

In spiral galaxies, the stars orbit in a very thin disk, and all the stars move in the same direction. Two or more spiral arms wind around the center just like a pinwheel.

Selecting a sample of about 50 spiral galaxies that have collided and in the process of merging into a single object. We took infrared images using the UH 88-inch (2.2-meter) telescope, and obtained spectra of these mergers using one of the Keck telescopes.

Infrared images are used to see, if the starlight in these objects decreases with distance from the center of the galaxy the way it does in spirals or the way it does in ellipticals. The light intensity decreases exponentially in outward direction from the centers of spirals, but it declines much more slowly with distance from the center for ellipticals. It is found that at least 45 out of 51 mergers are ellipticals.

Thus, most of these mergers really are evolving into elliptical galaxies.

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Nuclear power plant should have monitoring units and water purifiers units, so thet they followed propress in the plant.

Nuclear power plant is a structure that allows the generation of energy from the fission of toxic materials. It is usually due to the risk of accidents. Nuclear energy is very important for the generation of electricity in many countries.

Hence, water purifiers units should be used in the downstream to measure to protect river should be taken.

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Answer:

temperature and radiation levels

Explanation:

edge

Answer:

0.6

Explanation:

the original wire is three times the length there fore the longer the wire the more resistance

therefore the resistance of the original wire is 3 times greater making it 0.6

Answer:

If the absorbed beam is monochromatic (one wavelength) then it excites the H atom to some state n.

When that state decays, some of the atoms may decay to state 1, others to state 2, and still others to state 3

The net energy emitted in such a case would depend on:

n -1, n - 2, n - 3 which would produce 3 different wavelengths

The ticker tape is pulled through the timer once it's powered, which creates a dot along the length of this paper tape at fixed time intervals.

A ticker timer can be defined as a scientific apparatus that is designed and developed to measure time in seconds. Thus, a ticker timer can be used to measure short intervals of time by making dots on a paper tape at regular (fixed) intervals.

By design, a ticker timer comprises a magnet, carbon paper disk and a ticker tape which is pulled through the timer once it's powered, so as to create a dot along the length of this paper tape at fixed time intervals.

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The length the student should record as correct is ​18.55 centimeters (cm) because it is the average value.

The average value is a number associated with the middle amount for a given number of measured samples.

In this case, the median value results less useful to describe a set of data when compared to the average.

In conclusion, the length the student should record as correct is ​18.55 centimeters (cm) because it is the average value.

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Given the value of force applied in the given duration of time, the impulse or change in momentum caused by the net force is 720kgm/s.

An impulse is simply a concept that involves the change in the momentum of an object when force is introduced for a period of time.

It is expressed as;

ΔP or Change in Momentum = F × t

Where F is force applied and t is the elapsed time.

Given the data in the question;

ΔP = F × t

ΔP = 240kgm/s² × 3s

ΔP = 720kgm/s

Given the value of force applied in the given duration of time, the impulse or change in momentum caused by the net force is 720kgm/s.

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Answer:

You need to be careful when finding the true age of sedimentary rocks to understand its full history.

Explanation:

Answer:

100N

Explanation:

Answer:

The gravitational force on the moon is less than on Earth because the strength of gravity is determined by an object's mass. The bigger the object, the bigger the gravitational force. Gravity is pretty much everywhere. We just feel it in different ways depending on our state of motion.

Explanation:

Hope this helped!!

Answer: 10 million degrees

Explanation:

Hope this helps :)

Let's find the relationship

[tex]\\ \rm\Rrightarrow E=h\nu[/tex]

[tex]\\ \rm\Rrightarrow \lambda=\dfrac{c}{\nu}[/tex]

Answer:

b

Explanation:

It takes less effort to lift a piano with a pulley. If the piano is lifted 3 meters, then the pulley rope is pulled more than 1 meter, but less than 3 meters.

It takes less effort to lift a piano with a pulley. If the piano is lifted 3 meters, then. The correct answer is a. the pulley rope is pulled 1 meter.

When lifting a piano using a pulley system, the distance the pulley rope is pulled will be the same as the distance the piano is lifted. This is due to the mechanical advantage of the pulley, which reduces the amount of effort needed to lift the piano but does not change the distance the rope is pulled.

In a simple single fixed pulley system, where one end of the rope is attached to a fixed point and the other end is used to lift the piano, the distance the pulley rope is pulled will indeed be the same as the distance the piano is lifted.

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Answer:

342 g/mole

Explanation:

Mass of the carbon = 12 g

Mass of the hydrogen = 1 g

Mass of the oxygen = 16 g

Given: Chemical Formula of the Sucrose = C12H22O11

Molar mass = 12 x 12 + 1 x 22 + 16 x 11

= 144 + 22 + 176

= 320 + 22

= 342 g/mole ➪ molar mass of the sucrose

342 g.

Explanation:

Carbon has mass -> 12

Hydrogen has mass -> 1

Oxygen has mass -> 16

=> (12× 12 ) + (1 ×22 ) + ( 16 × 11 )

=> 144 + 22 + 176

=> 342 gram

what is a Molecule?

Answer:The electric field and magnetic field of an electromagnetic wave are perpendicular (at right angles) to each other. They are also perpendicular to the direction of the EM wave. EM waves travel with a constant velocity of 3.00 x 108 ms-1 in vacuum.

Explanation:

Answer:

c. Synaptic transmission

Explanation:

To transmit impulses/electronic signals around the body, nerve cells transfer messages across the synapse and the movement of the chemicals from one cell to the other is known as either diffusion or synaptic transmission.

The quantity of heat that was transferred to the block of iron is 5544 J or 5.544 kJ

From the question, we are to determine how much heat was transferred to the block of iron

Using the formula,

Q = mcΔT

Where Q is the quantity of heat

m is the mass

c is the specific heat capacity of the substance

and ΔT is the change in temperature

From the given information,

m = 0.400 kg

ΔT = 325 - 295 = 30 K

Putting the parameters into the equation, we get

Q = 0.400 × 462 × 30

(NOTE: Specific heat capacity of iron = 462 J/kg.K)

∴ Q = 5544 J

Hence, the quantity of heat that was transferred to the block of iron is 5544 J or 5.544 kJ

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As the volume of the container increases the pressure inside will decrease because the atoms have more room to move around in.

Answer:

 In a container of the same volume, a greater number of molecules results in greater pressure. Gas pressure increases as container volume decreases.

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Answer: 5.0 m/s

Explanation:i had this question on my test

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Conservation of linear momentum

[tex]\\ \rm\Rrightarrow m1v1+m2v2=(m1+M2)v3[/tex]

[tex]\\ \rm\Rrightarrow 1200(2.5)+2600(6.2)=(1200+2600)V3[/tex]

[tex]\\ \rm\Rrightarrow 3000+16120=3800v3[/tex]

[tex]\\ \rm\Rrightarrow 19120=3800v3[/tex]

[tex]\\ \rm\Rrightarrow V3=5m/s[/tex](Approx)

The markdown price for a mountain bike is $584.35

Markdown price is the discount offered by the shopkeepers to the customers to increase the sales rate.

M.P = S.P (1-r/100)

The following expression can be used every time we have to find the markdown price.

Substitute Selling price S.P =$899 and the percent r =35/100 =0.35, we get

M.P = $899(1-0.35)

M.P =$584.35

Thus, the markdown price is $584.35

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