good morning! can someone please answer this, ill give you brainliest and your earning 50 points.

Answer:

Explanation:

first find popotential energy

M.E=P.E+ K.E

K.E=1/2MV^2

K.E=1/2×72×261

K.E=9396

168=9396+P.E

P.e=-9228

Answer:

did you ever get the answer

The current in the wire has created a magnetic field with its north pole at the top of the rod. This is because the magnetic field influences electric currents. Thus, the correct option is C.

A magnetic field is a vector field which describes the magnetic influence on a moving electric charge, electric current, and magnetic material. A moving charge in a magnetic field which is experienced a force perpendicular to the own velocity and to the magnetic field.

The magnetic field is also referred to as the field where magnetic forces act to shape an electrical current. The only material or body which is capable of altering an electrical current in a magnetic field is the presence of another magnetic field in the space.

Therefore, the correct option is C.

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Answer:

Explanation:

Eclipse happens when a large object gets in the way of another object; casting its shadow over it.

Solar eclipse happens when the moon get in between the sun and earth. It blocks sun light and causes its shadow over the sun as seen from earth.

Lunar eclipse happens when the earth is in between the sun and moon. It blocks sun light from reflecting off the moon surface so there is a shadow on the moon as seen from earth.

Based on the principle of conservation of momentum;

The principle of conservation of momentum states that in an isolated system of colliding bodies, momentum is conserved.

This principle can be stated mathematically as:

The average speed of each trolley is calculated using the formula:

For Trolley A:

average speed = 100 mm/0.5 = 200 mm/s

average speed of A = 0.2 m/s

For Trolley B:

distance = 200 mm = 0.2 m

average speed = 0.2 m/0.5 s

average speed of B = 0.4 m/s

Momentum = mass × velocity

Assuming direction of motion of B is positive, direction of A is negative

Momentum of A = - m × 0.2 = -0.2m

Momentum of B = m/2 × 0.4 = 0.2 m

Total momentum = 0.2 m - 0.2 = 0

Therefore, the total momentum before and after the release of the spring is zero.

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Answer:

Let's assume the metal spheres are solid metal, and not charged beforehand.

The premise are similar, but the effect changes depending if you are approching from the side, between the spheres (left image) or the front (right image). Let's image the charged object is the tip of the arrow in the drawing, and it's small enough to be considered a point

In either case, the electron cloud in the spheres will be affected by the electric field generated by the charge, and gets attracted towards it (since the charge is positive and the electrons have by definition negative charge), moving according to the blue lines. For as long as the charge is in place, the "grouping" of charges on one side and the absence of charges on the other will create an electric dipole with the positive charge away from the side the arrived and the negative on the opposite end of the diameter.

The interesting part happens the moment you split the two spheres.

In the left case will realign based on the field lines (remember that a single charge will generate a radial field) and the moment you remove the charge the electrons are no longer drawn to one end, and will eventually re-distribute on the whole sphere, canceling the dipole.

In the right case instead, the fact that the spheres were touching allows the electrons in one of the sphere to migrate to the other, generating a net positive charge in the far sphere, and a net negative charge in the close one. if you separate the two spheres before removing the charge, the electrons are still "trapped" in the leftmost sphere, thus keeping it charged even after the original source is removed from the system.

Question :-

Answer :-

[tex] \rule {180pt} {2pt} [/tex]

Given :-

To Find :-

Solution :-

As per the provided information in the given question, Initial Velocity is given 0 m/s . Acceleration is given 2 m/s² . Displacement is given 9 m . And, we have been asked to calculate the Final Velocity .

For calculating the Final Velocity , we will use 3ʳᵈ Equation of Motion :-

Where ,

Therefore , by Substituting the given values in the above Equation :-

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: - \: ᴜ ^{2} \: = \: 2 \: \times \: ᴀ \: \times \: s} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: - \: 0 \: = \: 2 \: \times \: 2 \: \times \: 9} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: - \: 0 \: = \: 36} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: = \: 36} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ \: = \: \sqrt { \: 36 \: }} [/tex]

[tex] \longmapsto \: \: \textbf {\textsf {ᴠ \: = \: 6}} [/tex]

Hence :-

[tex] \underline {\rule {180pt} {4pt}} [/tex]

I formulate a hypothesis based on their observations about what occurs when both the rock and the wood are submerged in water.

Density is defined as the mass per unit volume. It is an important parameter in order to understand the fluid and its properties. Its unit is kg/m³.

The mass and density relation is given as

mass = density × volume

I study if the volume or density of items determines whether solid objects float or sink in water in this scientific inquiry I did the experiment of density, mass, and volume using a rock and a standard-shaped piece of wood.

It is critical that the chosen piece of wood is larger than the rock and that the rock be tiny enough to fit inside the measuring cylinder. I see both the rock and a chunk of wood.

Hence I formulate a hypothesis based on their observations about what occurs when both the rock and the wood are submerged in water.

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Answer:

The three types of impact that occur are those involving the vehicle, the body of the vehicle occupant, and the organs within the body of the occupant.

Sound travels fastest in solids. A sound is a vibration that travels in a longitudinal direction through a medium in the form of a mechanical wave.

A sound is a vibration that travels in a longitudinal direction through a medium in the form of a mechanical wave.

It can propagate through a solid, a liquid, or a gas as its medium. Solids go the fastest, liquids are slower, and gases are the slowest.

Sound travels the quickest through a solid because the molecules are packed together densely, allowing sound waves to leap from one molecule to the next more quickly.

Because the molecules in solids are packed the tightest, sound travels the quickest through them, whereas sound travels the slowest through gases.

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Answer:

solids

Explanation:

After years of observation, Hubble made an extraordinary discovery. In 1923 he spotted a Cepheid variable star in what was known as the Andromeda Nebula. Using Leavitt's techniques, he was able to show that Andromeda was nearly 1 million light years away and clearly a galaxy in its own right, not a gas cloud.

Answer:

answer below, like if this helps please.

Explanation:

A. If the slide became positively charged then that means the boy gained electrons. electrons can only move therefore when something becomes charged positively it is because of the transfer electrons.

B. the electrons go to the boy causing the slide to have more protons then the electrons.

Answer:

10 m/s

Explanation:

u of cue ball = 10 m/s

u of eight ball=0m/s

m of cue ball =0.16 kg

m of eight ball =0.16 kg

According to law of conservation of momentum

Momentum before collision = Momentum after collision

so

( m of cue ball X velocity of cue ball) + ( m of eight ball X velocity of eight ball)= (m of cue ball X velocity of cue ball after collision )+( m of eight ball X velocity of eight ball after collision)

thus

(0.16 X 10)+(.016 X 0)= (0.16 X 0)+ ( 0.16 X velocity of eight ball after collision)

1.6= 0.16 X velocity of eight ball after collision

1.6÷0.16= velocity of ball after collision

10= velocity of eight ball after collision

Answer:

T1 + T2 cos 60 = 1000 cos 15     balancing x-forces

T1 + T2 / 2 = 966         (I)

1000 sin 15 + .866 T2 = 1200    balancing y-forces

259 + .866 T2 = 1200

T2 = 941 / .866 = 1087          value for T2

T1 + 543 = 966         using equation (I)

T1 = 423

Answer:

Fn = m g cos 30 = .15 * 9.81 * .866 = 1.27 N    force of plane on car

Fp = m g sin 30 = .15 * 9.81 * 1/2 = .736 N    force along plane

m g h = W = potential energy of car = original mechanical energy

1/2 m v^2 = m g h    equating PE and KE

v^2 = 2 g h = 2 * 9.81 * .8

v = 3.96 m/s    original speed of blue cart

Launch energy of red cart

1/2 m v^2 = .15 / 2 * 16 = 1.2 J      launch energy of red cart

m g h = .15 * 9.81 * .55 = .81 J       potential energy of red cart

Wf = (1.2 -.81) J = .39 J        work done against friction

Answer:

I believe it's Pacific and Austrailian.

Explanation:

What's a. convergent boundary.

The place where two techtonic plates collides with each other .

Here the correct option is B

Answer:

D. 1

Explanation:

I believe this is the answer

Answer:

the answers would be D: all the above

Answer:

A. aluminum

Explanation:

because it's metal

Answer:

D or A

Explanation:

WHEN YOU PLACE A MAGNET CLOSE TO AN IRON MATERIAL IT INSTANTLY COMES TO IT

Answer:

15%

Explanation:

Answer:

word done = fore * distance moved by the force, so 11n * 0.8=8.8j then 8.8 * 6=52.8j

but all the books at ones means, 6*11=66N

and 66*0.8 = 52.8j

Explanation:

The work done is equal..

Answer:

the answer is An Arrow

Answer: its D

Explanation:

because the car is pulling it(trailer) to the left not the right

Answer:

0.32028758 oz.

Explanation:

Formula: 9080 mg, divide the mass value by 28349.5231

Which equals it 0.32028758 oz.

Answer:

0.3202876 oz

Explanation:

for an approximate result, divide the mass value by 28350

The length of spring when the block comes momentarily to rest on the compressed spring will be 0.054 m.The length of the spring by the letter x.

The energy is stored in the spring when it is stretched or compressed by some length. It is the product of mass, gravity and distance compressed or stretched. Mathrmatically it is given by;

PE=mgh

The given data in the problem is ;

m is the mass of the block is 0.5 kg height,

h is the height is released is 0.7 m

x initial length of the spring = 0.13 m.

K is the force constant of the spring = 1180 N/m.

By the law of conservation of energy,

The potential energy of the spring gets converted

[tex]\rm mgh=\frac{1}{2}KL^2 \\\\ \rm L= \sqrt{\frac{2mgh}{K} } \\\\ \rm L= \sqrt{\frac{2\times 0.5\times9.81 \times 0.7}{1180} \\\\ \\\\[/tex]

[tex]\rm L= 0.054m[/tex]

Hence the length of spring when the block comes momentarily to rest on the compressed spring will be 0.054 m

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Answer:

C

Explanation:

the reason is because both magnets and electric charges have both North and south poles

and like poles of both magnets and electric charges repel from eachother while unlike charge repel

pls give brainliest

Explanation:

A - Journalist

B - Journalist/News reporter

C - Photography/Paparazzi

D - Videography

Answer:

Static electricity

Explanation:

Opposite charges attract each other.

Answer:

Energy transformation, also known as energy conversion, is the process of changing energy from one form to another

Explanation:

Acceleration is the rate at which velocity changes.