Can y’all please help

Answer:

Newtons kg

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         Why do chemical reactions always involve a change in energy?

The energy change in a chemical reaction is due to the difference in the amounts of stored chemical energy between the products and the reactants. This stored chemical energy, or heat content, of the system is known as its enthalpy.

Answer:

0.9 N.

Explanation:

Mass (m) of car = 150 g

Initial velocity (u) = 0 m/s

Final velocity (v) = 24 m/s

Time (t) = 4 s

Next, we shall determine the acceleration of the car. This can be obtained as follow:

Initial velocity (u) = 0 m/s

Final velocity (v) = 24 m/s

Time (t) = 4 s

Acceleration (a) =?

v = u + at

24 = 0 + (a × 4)

24 = 0 + 4a

24 = 4a

Divide both side by 4

a = 24 /4

a = 6 m/s²

Thus, the acceleration of the car is 6 m/s²

Next, we shall convert 150 g to Kg. This can be obtained as follow:

1000 g = 1 kg

Therefore,

150 g = 150 g × 1 Kg / 1000 g

150 g = 0.15 Kg

Thus, 150 g is equivalent to 0.15 Kg

Finally, we shall determine the force of the car as follow:

Mass (m) of car = 0.15 Kg

Acceleration (a) of car = 6 m/s²

Force (F) of car =?

F = m × a

F = 0.15 × 6

F = 0.9 N

Therefore, the force of the car is 0.9 N.

Answer:

V = 220 [V]

Explanation:

In order to solve this problem we simply need to replace the given values of current and resistance in the expressions proposed.

R = 22 [kΩ] = 22000 [Ω]

I = 10 [mA] = 0.01 [A]

Voltage (V)

[tex]V = 0.01*22000\\V = 220 [V]\\[/tex]

Answer:

go to my comment on your most recent question

Explanation:

Answer: At the top of a projectile's path above earth, the acceleration of an object. Compared to the range of a bullet shot horizontally, a bullet shot at a 30 degree angle.

Explanation: I hope that helped!

Answer:

The kinetic energy is 600 J

Explanation:

Mechanical Energy

The principle of the conservation of mechanical energy states that the total mechanical energy in a system remains constant as long as the only forces acting are conservative forces.

The mechanical energy is defined as the sum of the potential plus kinetic energies:

E = U + K

Where E is the total mechanical energy, U is the gravitational potential energy and K is the kinetic energy.

Solving for K:

K = E - U

The system described has a total mechanical energy of E=950 J and gravitational potential energy of U=350 J, thus:

K = 950 J - 350 J

K = 600 J

The kinetic energy is 600 J

Answer:

i guss its A

Explanation:

Answer:

2917.4 m/s

Explanation:

From the question given above, the following data were:

Gravitational acceleration of the Moon (g) = 0.25 times the gravitational acceleration of the earth

Radius (r) of the Moon = 1737 Km

Escape velocity (v) =?

Next, we shall determine the gravitational acceleration of the Moon. This can be obtained as follow:

Gravitational acceleration of the earth = 9.8 m/s²

Gravitational acceleration of the Moon (g) = 0.25 times the gravitational acceleration of the earth

= 0.25 × 9.8 = 2.45 m/s²

Next, we shall convert 1737 Km to metres (m). This can be obtained as follow:

1 Km = 1000 m

Therefore,

1737 Km = 1737 Km × 1000 m / 1 Km

1737 Km = 1737000 m

Thus, 1737 Km is equivalent to 1737000 m

Finally, we shall determine the escape velocity of the rocket as shown below:

Gravitational acceleration of the Moon (g) = 2.45 m/s²

Radius (r) of the moon = 1737000 m

Escape velocity (v) =?

v = √2gr

v = √(2 × 2.45 × 1737000)

v = √8511300

v = 2917.4 m/s

Thus, the escape velocity is 2917.4 m/s

Answer:

Acceleration =13.63m/s^2

initial velocity = v = 45

final velocity = u = 0

acceleration = v-u/t

Answer:

it means the altitude of the object is 5m high or wide

Answer:

That they must die

Explanation:

Stick = Die

Answer:

Because its depends upon fundamental units and formed by combination of two or more fundamental units.

Explanation:

The question is not complete, here is the complete question

"Beatrice and the Elevator Beatrice, a middle school student, is visiting a very tall office building and notices that she feels heavier when the elevator car is traveling up and lighter when the elevator car is traveling down. After making these observations, Beatrice comes back to the building and stands on a bathroom scale that measures her weight as she travels up and down in the elevator.

1. . What question is Beatrice trying to answer?

2. What is one variable Beatrice could change in her investigation? What might she figure out if this

variable was changed"

1. Beatrice is trying to observe the influence of the elevator movement on her weight, Hence the question is "will the elevator  movement cause her weight to change"

therefore moving upward the reading on the scale will increase

Reading=mg+ma

downward

Reading will reduce

Reading=mg-ma

2. The independent variable is the acceleration due to gravity g=9.81m/s^2

while the dependent variables are

    i. The elevators acceleration

    ii. Beatrice's mass

Answer:

It would also double

Explanation:

F (force) = mass * acceleration; twice the mass means double tue force needed

Answer:

force=700N

mass=100kg

acceleration =?

Now,

F=m×a

700=100×a

700÷100=a

7=a

acceleration =7m/s^2 answer!!!

hope this may help you !!!!

Answer:

Production Engineering defines and works out how the product will be manufactured and/or assembled on the production line including design of packaging, ensuring the right quantity of components/products are delivered and aligned to support the speed of the production line.

Explanation:

Answer:

Production Engineers are responsible for supervising and improving production at plants and factories. They support engineering teams, draw up safety protocols, report issues to the Manager, and develop strategies to improve efficiency and profit.

Explanation:

Answer:

C. Core

Explanation:

The sky on Earth is blue because blue light is scattered through the atmosphere as the other colors of light pass through undisturbed. Dark nebulae  have something similar going on.

Nebulae are interstellar dust and gas clouds that get backlighting from stars both inside and behind them. The clouds are illuminated by the photons from these stars that are dispersed throughout them. A nebula does not generate most of the light that appears to come from it; rather, it reflects and refracted light.

A dark nebula, also known as an absorption nebula, is a form of interstellar cloud, particularly a molecular cloud, that is so dense that it absorbs all of the light from objects behind it, including emission or reflection nebulae and background stars, at visible wavelengths.

Learn more about nebulae here:

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Answer:

It slowly decreases and the friction acting on it slowing it down becomes the bigger net force, if that makes sense :)

Explanation:

If you kick a soccer ball across a field the ball travels across the field and slowly comes to a stop. Since the ball slowly comes to a stop, this means about the net force on the ball as it rolls across the field would decrease and finally would be less than the friction force.

Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum. The mathematical expression for Newton's second law is as follows

As given in the problem if you kick a soccer ball across a field the ball travels across the field and slowly comes to a stop. Since the ball slowly comes to a stop.

Since the ball stops gradually, this implies that the net force exerted on it as it rolls over the field will eventually diminish until it is less than the friction force.

Learn more about Newton's second law here, refer to the link given below ;

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Answer:

hope it helps..

Explanation:

Moment of force about a given axis= Force x perpendicular distance of force from the axis of rotation.

Explanation:

Moment of force about a given axis= Force x perpendicular distance of force from the axis of rotation.

Well we know the hypotenuse of the triangle which is 253 m. And we know the angle of the triangle which is 55.8 degrees. So we want to find y. And to find y we use sin. And sin is a ratio, the ratio of the opposite leg, and hypotenuse. So sin(55.8) = y/253. Now we solve for y by multiplying both sides by 253. And finally we get 209.25 as the length of the y component.

Answer:

1. C

2. C

Explanation:

1 is like running your socks on the carpet it creates friction.

2. is because the force you have by yourself is less than the sofas

Answer: friction

Explanation:

Answer:

Explanation:

speed = distance / time

          = 15 meters / 3 seconds

          = 5 meter / sec.

Answer:5/sec

Explanation:

Answer:

in the statement of account very seriously

Answer:

C) Power is the product of voltage and current.

Explanation:

A.pex, hope this helps:)

Answer:

The answer is C. Power is the product of voltage and current

Explanation:

I am currently taking the test right now. This is on A P E X for me.

Answer:

needle

Explanation:

A. 30 m/s . . . speed

B. 30 m to the East  . . . displacement

C. 30 m/s to the East  . . . velocity

D. 30 m . . . distance

If a  ball is thrown horizontally at a height of 2.20 meters at a velocity of 65.0 m/s. Assuming no air resistance, then the distance traveled by the ball horizontally when it hit the ground would be  43.55 meters.

There are three equations of motion given by Newton,

v = u + at

S = ut + 1/2 × a × t²

v² - u² = 2 × a × s

As given in the problem If a ball is thrown horizontally at a height of 2.20 meters at a velocity of 65.0 m/s. Assume no air resistance.

S = ut + 1/2 × a × t²

2.2 = 0 + 0.5 × 9.8 ×  t²

t² = 2.2 / 4.9

t = 0.67 seconds

The horizontal displacement of the ball = 0.67 × 65

                                                                  = 43.55 meters

Thus, the distance traveled by the ball horizontally when it hit the ground would be  43.55 meters.

To learn more about equations of motion here, refer to the link given below ;

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