Solve these two please its urgent, If i like your answer ill give brainly....

Answer:

Electricity?

Explanation:

Answer:

The kinetic energy of the molecules would increase.

Explanation:

Answer:

C. The kinetic energy of the molecules would increase.

Explanation:

On Edge 2021

Answer:

b

Explanation:

Answer:

the canon would be blasted .4/6 miles bc it s half of 9.8 which shows its signifigant expretion on the decimal point weather its a posative or negative

Explanation:

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The value  is [tex]F_f = 3 * -4[/tex]

Explanation:

From the question we are told that  

  The mass of the block is  [tex]m = 3 \ kg[/tex]

  The initial speed of the block before entering the rough section is [tex]u = 5 \ m/s[/tex]

  The time taken is  t = 0.5 s

   The  speed with which the block leaves the rough section is  [tex]v = 3 \ m/s[/tex]

Generally from kinematic equation

      [tex]v = u + at[/tex]

=>   [tex]a = \frac{v - u }{t}[/tex]

=>   [tex]a = \frac{3 - 5 }{0.5}[/tex]

=>   [tex]a = - 4[/tex]

Generally the magnitude of the average frictional  force is mathematically represented as

      [tex]F_f = m * a[/tex]

=>  [tex]F_f = 3 * -4[/tex]

=>    [tex]F_f = -12 \ N[/tex]

The negative sign show that the force is acting in the opposite direction to the direction of motion of the block

The frictional force between the block and the horizontal surface is 12.1 N.

The given parameters;

The acceleration of the block is calculated as follows;

[tex]a = \frac{\Delta v}{t} \\\\a = \frac{5- 3}{0.5} \\\\a = 4 \ m/s^2[/tex]

The coefficient of friction between the block and the horizontal surface is calculated as;

[tex]\mu_k = \frac{a}{g} \\\\\mu_k = \frac{4}{9.8} \\\\\mu_k = 0.41[/tex]

The frictional force between the block and the horizontal surface is calculated as follows;

[tex]F_f = \mu_k F_n\\\\F_f = \mu_k mg\\\\F_f = 0.41 \times 3 \times 9.8\\\\F_f = 12 .1 \ N[/tex]

Thus, the frictional force between the block and the horizontal surface is 12.1 N.

"Your question is not complete, it seems to be missing the following information;"

A block of mass 3 kg slides along a horizontal surface that has negligible friction except for one section, as shown above. The block arrives at the rough section with a speed of 5 m/s and leaves it 0.5 s later with a speed of 3 m/s. What is the magnitude of the average frictional force exerted on the block by the rough section of the surface?

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Answer:

Time = 1.44 minutes

Explanation:

Given that the circumference of the wheel is 1250 m, which is the distance to be covered.

Thus,

speed =

distance = 1250 m, speed = 12 m/s.

So that;

12 =

time =

       = 104.16667

time = 104.17 s

But, 60 seconds = 1 minute

time = 1.4417

       = 1.44 minutes

The time required for one trip around the wheel is 1.44 minutes.

Answer:

The magnitude of the hiker’s resultant displacement is 5.6 km

The direction of the hiker’s resultant displacement is 77 degrees south west! Hope this helps!!!

Answer:

Heat energy

Explanation:

The seemingly lost energy due to the work done by friction is lost to heat energy.

When we account for heat energy of the system, it is clearly seen that it is not lost as we perceive it.

answer:- external force is 2 N .

The force that impacts the ball motion is external force i.e. 2N.

Given that,

Based on the above information, the calculation is as follows:

= 7N - 5N

= 2N

This 2N represents the external force.

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Answer:

5,730 years

i literally took a test on this question yesterday, lol

Explanation:

Hopefully this helped, if not HMU and i will try my best to get u a better answer, and if u need help with anything just let me know and i got u! :)

Explanation:

an echo mimics exactly what is said, this is like a mirror because when you look in a mirror every action you make is copied by your reflection

Answer:

There are 2 types of forces, contact forces and act at a distance force. Forces. Every day you are using forces. Force is basically push and pull. When you push and pull you are applying a force to an object.The Four Fundamental Forces of Nature

Gravity.

The weak force.

Electromagnetism.

The strong force.

Answer:

The final velocity of the bullet is approximately 3.795 m/s

Explanation:

The given parameters are;

The mass of the bullet, m = 5.0 g

The force applied to the bullet, F = 45 N

The distance over which the force is applied, d = 0.80 m

Therefore, we have;

The final kinetic energy of the bullet = = 1/2 × m × v² = The work done on the bullet by the 45 N force = F × d

Where;

v = The final velocity of the bullet

By substitution, we get;

The final kinetic energy of the bullet = 1/2 × 5.0 × v² = 45 × 0.8

1/2 × 5.0 × v² = 45 × 0.8

v² = (45 × 0.8)/(1/2 × 5.0) = 14.4

v = √14.4 ≈ 3.795

The final velocity of the bullet = v ≈ 3.795 m/s

Answer:

W = 320 [N]

Explanation:

In order to solve this problem, we must take into account that weight is defined as the product of mass by gravity.

[tex]W=m*g[/tex]

where:

W = weight [N] (units of Newtons)

m = mass = 200 [kg]

g = gravity acceleration = 1.6 [m/s²]

The mass is always conserved, independent of the location of the body in space.

[tex]W = 200*1.6\\W = 320 [N][/tex]

5m I think,maybe, not a 100% sure die

Answer:

5m i think

Explanation:

WHATS THE ANSWER HELP!!

Answer:

The velocity of the freight cars after collision is 0.7 m/s

Explanation:

Given;

mass of the first freight car, m₁ = 18000 kg

initial speed of the first freight car, u₁ = 1.75 m/s

mass of the second freight car, m₂ = 27000 kg

initial speed of the second freight car, u₂ = 0

Let the velocity of the freight cars after collision = v

Apply the principle of conservation of linear momentum;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

18000(1.75) + 27000(0) = v(18000 + 27000)

31500 = 45000v

v = 31500 / 45000

v = 0.7 m/s

Therefore, the velocity of the freight cars after collision is 0.7 m/s

Answer:

Option A. 0.36 m/s to the left

Explanation:

From the question given above, the following data were obtained:

Force resistance (Fᵣ) = 55.2 N

Applied force (Fₐ) = 31.8 N

Mass (m) = 65.2 kg.

Acceleration (a) =?

Next, we shall determine the net force acting on the skateboarder. This can be obtained as illustrated below:

Force resistance (Fᵣ) = 55.2 N

Applied force (Fₐ) = 31.8 N

Net force (Fₙ) =?

Fₙ = Fᵣ – Fₐ

Fₙ = 55.2 – 31.8

Fₙ = 23.4 N to the left

Finally, we shall determine the acceleration of the skateboarder. This can be obtained as follow:

Mass (m) = 65.2 kg.

Net force (Fₙ) = 23.4 N to the left

Acceleration (a) =?

F = ma

23.4 = 65.2 × a

Divide both side by 65.2

a = 23.4 / 65.2

a = 0.36 m/s

Since the net force acting on the skateboarder is to the left. Therefore, the acceleration of the stakeholder will also be towards the left (i.e 0.36 m/s to the left)

Answer:

A. 0.36 m/s to the left

Answer:

8

Explanation:

im gonna say 8 because the peak of the line would be at 8 not to sure 0-0

Answer:

B. heat and kinetic energy

Explanation:

Heat is a form of energy that flows with respect to temperature difference. Thus, heat energy would flow from an object with higher temperature to that at lower temperature. It generally cascades from a high temperature body to lower temperature body through a medium or when in contact.

Kinetic energy is the energy that is inherent in a moving object. Thus, it can be converted to other forms or transferred between objects. Example, a moving object can transfer part of its kinetic energy to an object at rest on collision. This may cause the motion of the initial stationary object.

Therefore, heat and kinetic energy can be used to describe transfer of energy to or from a substance.

Answer: A; Precipitate

Explanation:

Answer:

1.6L

Explanation:

Given parameters:

Initial volume  = 1.5L

Initial temperature  = 5°C  = 5 + 273  = 278K

Final temperature  = 30°C = 30 + 273  = 303K

Unknown:

Final or new volume  = ?

Solution;

Since pressure is constant, we simply apply Charles's law to solve this problem.

Using the expression below,

          [tex]\frac{V_{1} }{T_{1} }[/tex]   = [tex]\frac{V_{2} }{T_{2} }[/tex]

V and T are volume and temperature

1 and 2 are initial and final states

  Insert the parameters and solve;

         [tex]\frac{1.5}{278}[/tex]   = [tex]\frac{V_{2} }{303}[/tex]

          278V₂  = 1.5 x 303

                V₂  = 1.6L

Answer:F=1.7802

Explanation:

Since we've been given the mass to be .18kg,we are asked to find the Force of which the formulae is

F=ma where f-force,m-mass and a-acceleration due to gravity

So we can just substitute

F-?.m=.18 and a9.89

F=.18×9.89

F=1.7802N

The gravitational force on Earth due to the ball will be 1..769 N . While the  Earth's resulting acceleration will be 2.9 ×10²³ m/sec².

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force

The given data in the problem is;

m is the mass of ball=0.18 kg

F is the gravitational force=?

m is the mass of earth= 6.0 x 1024 kg.​

r is the radius of earth = 6.3781×106 m

G is the universal gravitational constant= 6.67408×10-11 Nm/kg2

The gravitational force is given by;

[tex]\rm F_G=\frac{ G m_1m_2}{r^2} \\\\ \rm F_G=\frac{ 6.67 \times 10^{-11} 0.18 \times 6.0 \times 10^{24}}{6.3781\times 10^6)2}[/tex]

[tex]\rm F_G= 1.769 N[/tex]

Hence the gravitational force on Earth due to the ball will be 1..769 N.

The force is given as the product of mass and acceleration. So that the value of acceleration is found by;

[tex]\rm a= \frac{F}{m} \\\\ \rm a= \frac{1.769}{6.0 \times 10^{24}}[/tex]

[tex]\rm a= 2.9 \times10^{-23}[/tex] m/sec²

Hence the  Earth's resulting acceleration will be  2.9 ×10²³  m/sec².

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Answer:

B. 59 kg

Explanation:

From the graph you notice that a linear relation in indicated by the line joining the points such that the points on the line represent the data that show a correct relationship in the experiment.

This means that the point outside the line has an error .

This point is the value 59 kg that does not align with other values which are included in the graph.

Answer:

59kg

Explanation:

Answer:

C

Explanation:

Opposites attract, the north pole of one of the magnet is attracted to the south pole of the other magnet. Two north or south poles will repel away from each other.

The north pole of one magnet is near the South pole of the other magnet.

The ends of a magnet are called its poles. One end is called the north pole, the other is called the south pole. If you line up two magnets so that the south pole of one faces the north pole of the other, the magnets will pull toward each other. This is called attraction.

"A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets."

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Answer:

I believe it is either Metals or Nonmetals

Explanation:

Hope this helped, Have a Wonderful Day/Night!!

Answer:

5.5 to 7 Mohs

Explanation:

Glass ranks around 5.5 to 7 Mohs, but sapphire crystal has a hardness of 9 Mohs, making it only slightly less hard than diamond.

Answer: 5.5

Explanation:

Several hardness scales have been developed to catalog the materials (specifical minerals), being the Mohs scale the best known. This scale, proposed by the German geologist Friedrich Mohs in 1825, consists of a ratio of ten minerals numbered in increasing order by hardness, from least to greatest.

Answer:

F' = (4/9)F

Explanation:

The electrostatic force between two charged objects is given by Coulomb's Law:

F = kq₁q₂/r²   -------------------- equation (1)

where,

F = Electrostatic Force

k = Coulomb's Constant

q₁ = magnitude of first charge

q₂ = magnitude of second charge

r = distance between charges

Now, when the charges and distance altered as follows:

q₁' = 2q₁

q₂' = 2q₂

r' = 3r

Then,

F' = kq₁'q₂'/r'²

F' = k(2q₁)(2q₂)/(3r)²

F' = (4/9)kq₁q₂/r²

using equation (1):

F' = (4/9)F

Answer:

The protons must feel a repulsive force from the other neighboring protons. This is where the strong nuclear force comes in. ... If they can't get that close, the strong force is too weak to make them stick together, and other competing forces (usually the electromagnetic force) can influence the particles to move apart.^o^

Answer:

Because, they are of the same charge that is, + and +, + can't go with another +.

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Explanation:

density to the amount of wood in a unit , per volume of wood. the ratio of dry weight and green volume of the given wood is basic wood density.

Answer:

The Equivalence Principle of Gravity

Explanation:

The fact that objects fall to earth at the same speed is called the Equivalence Principle of Gravity.

According to the Equivalence Principle of Gravity, all things fall at the same rate when there is little to no air resistance. The value of the acceleration caused by gravity is demonstrated by the force of gravity equation to be a constant that is independent of the mass of the item.

According to Einstein's equivalence principle, it is unnecessary to distinguish between gravitational and inertial forces because they are comparable in nature.

Therefore, the Equivalence Principle of Gravity states that all objects descend to Earth at the same rate.

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