What is your understanding of Electricity? Describe how electricity works, circuits, how does it move, what is moving? Where does electricity come from?

Answer:

A distance-time graph shows how far an object has travelled in a given time. It is a simple line graph that denotes distance versus time findings on the graph. Distance is plotted on the Y-axis. Time is plotted on the X-axis

Explanation:

Answer: 25.04m/s

Explanation:

v^2 = v^2o + 2a(x-xo)

v^2 = velocity 

v^2o = initial velocity 

a = acceleration 

x = final position/distance 

xo = initial position/distance

In this case, the initial velocity is 0 since the ball wasn't moving before it was dropped. The final position is 32 as the motion ended after the ball traveled 32m. The initial position is 0. The acceleration is 9.8m/s (free fall). Plug these numbers into the formula: 

v^2 = 0 + 2(9.8)(32)

v^2 = 25.04396135 

Round to get 25.04m/s

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The star formation ceased in the galactic halo as all of the galaxy's cool gas settled to the galactic plane long ago. Option D is the correct answer.

A galaxy's extended, approximately spherical galactic halo is its visible component that extends beyond the primary portion that is visible to the na-ked eye. The halo currently consists of a number of distinct galaxies: the galactic corona, the stellar halo, and the dark matter halo. Option D is the correct answer.

In spiral galaxies, where the spherical form of the halo contrasts with the flat disc, the separation between the halo and the main body of the galaxy is most obvious. There is no clear separation between the main parts of the galaxy and the halo in an elliptical galaxy. A halo's impact on the passage of light from far-off, brilliant objects like quasars that are in line of sight beyond the target galaxy may be investigated.

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The cessation of star formation in the galactic halo is primarily due to the absence of gas and dust, which are essential for the formation of new stars.

The galactic halo is a region surrounding a galaxy that contains old stars and globular clusters. It is composed mainly of dark matter and lacks significant amounts of gas and dust. The absence of gas and dust in the galactic halo is one of the main reasons for the cessation of star formation.

Gas is required for the formation of new stars as it provides the necessary material for gravitational collapse and subsequent star formation. In the galactic halo, the gas has either been consumed in previous star formation or has settled to the galactic plane, leaving the halo devoid of the necessary ingredients for new star formation.

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Answer:

True

Explanation:

As far as I know, constructive interference means waves are "in phase" and destructive interference means the waves are "out of phase"

Answer:

true

Explanation:

destructive interference occurs when two identical waves are superimposed exactly out of phase.

Answer:

→Inverted image ( upside down )

→Real image ( because it is formed on the screen )

→Magified image ( image size is greater than object size)

ans. = 2

we know that,

the formula for small angle deviation is

deviation = ( refractive index - 1)angle of the prism

putting values we get

= ( 1.5 -1 ) 4

= 0.5 x 4

= 2

Hence, the deviation of prism is 2

Answer:

hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9

The car's speed as it coasts into the gas station on the other side of the valley is 29.4 m/s.

At the top of  first hill,  total mechanical energy of the system is given by:

\(E = mgh + 1/2 mv^2\)

where m is the mass of  car, g is the acceleration due to gravity, h is  height of  hill, and v is the velocity.

Substituting values, we get:

\(E = (1250 kg)(9.81 m/s^2)(10 m) + 1/2 (1250 kg)(17 m/s)^2\)

\(E = 767125 J\)

At the bottom of the valley,  total mechanical energy of the system is given by:

\(E = mgh + 1/2 mv^2\)

Setting the initial mechanical energy equal to the final mechanical energy, we get:

\(mgh + 1/2 mv^2 = mgh' + 1/2 mv'^2\)

Car has run out of gas, we can assume that there is no external work done on the car.

Solving for v':

\(v' = sqrt(2gh + v^2 - 2gh')\)

Substituting  given values, we get:

\(v' = sqrt(2(9.81 m/s^2)(10 m) + (17 m/s)^2 - 2(9.81 m/s^2)(15 m))\)

\(v' = 29.4 m/s\)

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When you eat pizza, chemical energy is transferred to mechanical energy.

Energy can be defined as the ability to do work. Thus, energy must be possessed or transferred to a physical object (body) before work can be done.

In Science, there are different forms of energy and these include the following;

When a person eats pizza, the chemical energy contained in this snack is transferred to mechanical energy.

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We expect the last colour of the sunset to be on the red end of the visible spectrum because of the dispersion of light.  Due to the particles present in the atmosphere, the light rays undergo scattering and the light of shorter wavelengths like blue gets dissipated but light rays of longer wavelengths travel long distances without getting dissipated.

Dispersion of light is the phenomenon in which the light from the sun is split into its constituent colours which are Violet, Indigo, Blue, Green, Yellow, Orange, and Red when it passes through a prism or due to the particles present in the earth's atmosphere.  

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The correct option is: (ii) the force of the rope on Pam (iii) the motion force (due to Pam's motion to the right)

There are several forces that affect the movement of an object, and these can be represented by vectors with different properties. Pam's movement is affected by forces that work in different directions, including the force of the block on Pam, the force of the rope on Pam, and the motion force (due to Pam's motion to the right).The force of the block on Pam cannot exert a force on Pam as she moves to the right because it is in the opposite direction of her movement. The block is being pulled to the left, which will cause Pam to move to the right. Therefore, it cannot exert a force on Pam. However, it does exert a force on the rope, which in turn exerts a force on Pam. The force of the rope on Pam is in the direction of Pam's movement, and it is what causes her to move to the right.

Therefore, this force is responsible for Pam's movement in the direction she is going.The motion force (due to Pam's motion to the right) also exerts a force on Pam as she moves to the right. This force is a result of the motion that Pam is undergoing, which is what causes her to continue moving in the same direction.

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The velocity of the object with the larger mass is 2.56 m/s.

The given parameters:

The speed of the larger mass is determined by applying the principle of conservation of linear momentum as follows;

\(m_1v_1 = m_2v_2\\\\v_2 = \frac{m_1v_1}{m_2} \\\\v_2 = \frac{16\times 4}{25} \\\\v_2 = 2.56 \ m/s\)

Thus, the velocity of the object with the larger mass is 2.56 m/s.

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A projectile was fired with initial velocity of 40 m/s and at angle 30⁰ above the horizontal. Its initial vertical velocity is 20 m/s.

In a projectile motion, at a time instant t, the velocity v can be divided into its horizontal and vertical components: vx and vy. Let the projectile is fired at angle θ above the horizontal, then:

vx = v cos  θ

vy = v sin  θ

Where:

v = velocity at time instant t

Parameters given:

v = 40 m/s

θ = 30⁰

Hence, the vertical velocity is:

vy = v sin 30⁰

    = 40 . 1/2 = 20 m/s

Complete question:

Determine the magnitude of the initial vertical velocity of the projectile, vy, when the magnitude of its initial velocity, v, was 40. meters per second and the angle is 30⁰ above the horizontal.

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The alpha particles are capable of alternating the mass and atomic numbers in the atoms which is responsible for transmutation. This occurs in nuclear reacting.

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Answer:

Astrophobia

Explanation:

heop it help

Answer:

b. Thermal energy will flow from your hand to the snowball.

Explanation:

Answer:

B

Explanation:

Explanation:

i think this is the answer

Answer:

Inclined Plane - A ramp, for example a wheelchair ramp to help move to another level.

Wheel & Axle - On lawnmowers and wheelbarrow.

Lever - A seesaw

Pulley - adjustable clothesline (think from back then when you would put clothes out to dry them)

Screw - the bottle caps you screw on or off

Answer:The answer is option C, the point A

Explanation:Just did it

c. A  is the correct answer.

It is the acceleration of a body traversing a circular path. Because velocity is a vector quantity (that is, it has both a magnitude, the speed, and a direction), when a body travels on a circular path, its direction constantly changes and thus its velocity changes, producing an acceleration.

According to the question.

In the picture , a person swinging a toy plane attached to a string in uniform circular motion.

The direction of velocity is perpendicular to the direction of the position and tangent to the circular orbit.

When an object moves in a circular orbit, the direction of the velocity changes and the speed may change as well.

Direction of velocity is constantly changing.

The tangent at any point gives the direction of velocity at that point, where as acceleration is always directed towards the recent in a uniform circular motion.

Therefore, vector A  points in the direction of the centripetal acceleration of the plane.

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Answer:

When you squeeze a bottle that has a balloon attached to its opening, the pressure inside the bottle increases. This increased pressure will cause the air molecules inside the bottle to move closer together, which in turn will cause the balloon to inflate.

If you continue to squeeze the bottle, the pressure inside the bottle will continue to increase, and the balloon will continue to inflate. However, if you squeeze the bottle too hard, the balloon may burst due to the excess pressure.

When you release the pressure on the bottle, the air molecules inside the bottle will spread out again, causing the pressure to decrease. As a result, the balloon will deflate back to its original size.

Answer:

v = 4 m/s

Explanation:

Given :

Ball X :

Mass, m1 = 8kg ;

Initial Velocity, u1 = 2 m/s

Final velocity, v1 = 0

Ball Y:

Mass, m2 = 4kg ;

Initial Velocity, u2 = 0 m/s

Final velocity, v2 = v

(m1u1 + m2u2) = (m2v2 + m1v1)

(8*2 + 4*0) = (4*v + 4*0)

16 + 0 = 4v + 0

16 = 4v

v = 16 / 4

v = 4 m/s

Answer:

Explanation:

This is the Law of Momentum Conservation which for us looks like this:

\([m_xv_x+m_yv_y]_b=[m_xv_x+m_yv_y]_a\) and that should look familiar to you if this is what you are doing in physics. Filling in our particular info:

[(8.0 × 2.0)+ (4.0 × 0.0)] = [(8.0 × 0.0) + (4.0v)] and

16 + 0 = 0 + 4.0v and

16 = 4.0v so

v = 4.0 in the direction of ball X

Answer:

M= -10/4

M = -5/2

-5/4 + m = -15/4

Explanation:

3/4 + m = -7/4

Subtract 3/4 from both sides

3/4 + m - 3/4 = -7/4 - 3/4

m = (-7-3) / 4

m = -10/4

m = -5/2

Check the options

11/4 + m = -1/4

m = -1/4 - 11/4

m = (-1-11) /4

m = -12/4

m = -3

-5/4 + m = -15/4

m = -15/4 + 5/4

m = (-15+5) /4

m = -10/4

m = -5/2

Answer:

Reflected ray. A ray of light or other form of radiant energy which is thrown back from a nonpermeable or nonabsorbing surface; the ray which strikes the surface before reflection is the incident ray.

Answer:

In optics a ray is an idealized model of light, obtained by choosing a line that is perpendicular to the wavefronts of the actual light, and that points in the direction of energy flow.[1][2] Rays are used to model the propagation of light through an optical system, by dividing the real light field up into discrete rays that can be computationally propagated through the system by the techniques of ray tracing. This allows even very complex optical systems to be analyzed mathematically or simulated by computer. Ray tracing uses approximate solutions to Maxwell's equations that are valid as long as the light waves propagate through and around objects whose dimensions are much greater than the light's wavelength. Ray theory (geometrical optics) does not describe phenomena such as diffraction, which require wave theory. Some wave phenomena such as interference can be modeled in limited circumstances by adding phase to the ray .

The power factor of zero leading in a circuit that is entirely capacitive, with the current 90 degrees ahead of the voltage.

An electric circuit's power source exerts pressure known as voltage on charged electrons (current), causing them to flow through a conducting loop and perform tasks like lighting a lamp. Voltage is measured by volts and is simply equal to pressure (V).

Voltage, commonly referred to as electromotive force, is merely the amount of energy contained in one charge. The difference of electric voltage between two places is what is referred to as voltage, in other words. Simple electric charge flow rate is known as current.

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After 1 day has passed, approximately 6.25% of Element Z would be remaining.

The half-life of an element is the time it takes for half of the initial amount of the element to decay or transform into another element or isotopes. In this case, Element Z has a half-life of 5 hours.

To determine the percentage of Element Z remaining after 1 day (24 hours), we need to calculate the number of half-lives that have occurred.

Since the half-life of Element Z is 5 hours, there are 24 hours divided by 5 hours, which equals 4.8 half-lives.

Each half-life reduces the amount of Element Z by half. So, after 4.8 half-lives, the remaining amount of Element Z would be (1/2)^(4.8) = approximately 0.0625 or 6.25%.

Therefore, after 1 day has passed, approximately 6.25% of Element Z would be remaining.

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