A 1200 kg car is travelling qt 20m\s determine the work that must be done on the car by the frictional force of the brakes to stop the car

Answer:

395 m/s

Explanation:

By using the first equation of motion,

→ v = 75 + 8(40)

→ v = 75 + 320

→ v = 395

[tex]\huge{ \mathfrak{ \underline{Áñswér: }}}[/tex]

A change in state is considered a :

[tex] \hookrightarrow { \mathbb{\: physical \: change}}[/tex]

[tex]\#TeeNForeveR [/tex]

Electrons moving between objects should be place in the region marked X. So, option A.

When a substance is exposed to an electric or magnetic field, it has a characteristic known as charge that makes it experience a force. Neither a positive nor a negative charge exists.

Here,

Normally, electrons are organized into specific shells that maintain a constant distance from the atom's nucleus.

Two electrons can fit inside of the shell that is closest to the nucleus. Up to eight can fit inside the following shell. The number of electron shells in some atoms with numerous protons can reach seven.

A powerful force of attraction exists between the protons and the electrons in the shells that are closest to the nucleus.

In the outermost shells of certain atoms, the protons are sometimes attracted to the electrons with little force.

One can force these electrons out of their orbits. They may switch from one atom to another by applying a force. Electricity is produced by the changing electrons.

Hence,

Electrons moving between objects should be place in the region marked X. So, option A.

To learn more about charge, click:

https://brainly.com/question/14692550

#SPJ5

Answer:

???????????????????????????????????????

Explanation:

Answer:

q r s t u v w x y z

Explanation:

Answer:

b. compensate for changes in the Earth's atmosphere and achieve better resolution.

Explanation:

Answer:

True

Explanation:

When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).

Hope this helps!!

Answer:

Atoms are composed of electrons (charge -1), protons (charge +1), and neutrons (no charge). So in a neutral atom the correct answer is "D".

Answer:

2.00 (right on acellus)

Explanation:

doubling the distance between two charges makes F (8.00) quarter, so you would just do 8.00*1/4.

Answer:

v = 12.8 m/s

Explanation:

Applying the law of conservation of energy:

[tex]m_1u_1+m_2u_2=m_1v_1+m_2v_2[/tex]

where,

m₁ = mass of baseball = 149 kg

m₂ = mass of catcher = 57 kg

u₁ = initial speed of ball = 17.7 m/s

u₂ = initial speed of catcher = 0 m/s

v₁ = v₂ = v = final speed of ball and the final speed of catcher = ?

both are same because ball is in hands of cathcer in the final state.

Therefore,

[tex](149\ kg)(17.7\ m/s)+(57\ kg)(0\ m/s)=(149\ kg)(v)+(57\ kg)(v)\\\\v = \frac{2637.3\ kgm/s}{206\ kg}[/tex]

v = 12.8 m/s

Answer:

They first spend it on necessities.

Answer:

26v

....................

Explanation:

Given that,

The frequency of microwaves, [tex]f=9\times 10^9\ Hz[/tex]

The time period of the wave is :

[tex]t=\dfrac{1}{f}\\\\t=\dfrac{1}{9\times 10^9}\\\\t=1.1\times 10^{-10}\ s[/tex]

Let [tex]\lambda[/tex] is the wavelength of the wave. We know that,

[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}[/tex]

Put all the values,

[tex]\lambda=\dfrac{3\times 10^8}{9\times 10^{9}}\\\\\lambda=0.03\ m[/tex]

Hence, this is the required solution.

Answer:

The Liver, Pancreas and Gall Bladder are involved in the process of delivering the digestive juices for the Intestines

Explanation:

Answer:

Only circuit A will contain to lit bulbs

Answer:

Answer:bus or train station is the answer of your question

hope it is helpful to you

Answer:

A. 1 unit

B. 5 units

C. 8 units

Explanation:

Count the lines from each starting point to each destination.

Answer:

The type of reaction represented by the model is an;

Exothermic reaction

Explanation:

Exothermic reaction reaction is a reaction that involves the giving off of excess energy as heat and or light by two or more reactants during a chemical reaction due to the higher combined energy of the reactants compared with the product

The analogy are;

The sponge balls are the reacting atoms

The water is the energy which they contain

The water given off is the excess energy which the compound formed by putting together the two soaked sponge balls is unable to hold.

Answer:A 2.2kg block of ice slides across a rough floor. Its initial velocity is 2.5m/s and its final velocity is 0.50m/s. How much of the ice block melted as a result of the work done by friction? (Latent Heat of water is 3.3*10^5J/kg)

Explanation:

The heat produced by friction between a skate and the ice during movement over the surface melts the topmost layer of ice. However, even when you are still, ice is still slick. When you remain still on ice, there is no friction to produce heat, but the ice is still slippery.

Although friction does generate heat, the amount of heat it produces is insufficient to melt ice that is at a very low temperature. But even at low temperatures, ice still creates a slick liquid layer. The formation of a slippery coating even when the item is totally still cannot be explained by frictional heating.

Therefore, A rough floor is traversed by a 2.2 kg lump of ice. It moves at a final speed of 0.50 m/s after starting out at 2.5 m/s. What portion of the ice block melted as a result of the friction's work? (Water has a latent heat of 3.3×105 J/kg.)

Learn more about friction here:

https://brainly.com/question/13000653

#SPJ2

Answer:

20 meters.

Explanation:

In the graph, the x-axis (the horizontal axis) represents the time, while the y-axis (the vertical axis) represents the distance.

If we want to find the distance covered in the first T seconds, you need to find the value T in the horizontal axis.

Once you find it, we draw a vertical line, in the point where this vertical line touches the graph, we now draw a horizontal line. This horizontal line will intersect the y-axis in a given value. That value is the total distance travelled by the time T.

In this case, we want to find the total distance that David ran in the first 4 seconds.

Then we need to find the value 4 seconds in the horizontal axis. Now we perform the above steps, and we will find that the correspondent y-value is 20.

This means that in the first 4 seconds, David ran a distance of 20 meters.

Answer:

7 volts

Explanation:

Applying,

E = IR+Ir................ Equation 1

Where E = electromotive force of the cell, I = current. R = External resistance, r = internal resistance.

From the question,

Given: I = 2 amperes, R = 3 ohm, r = 0.5 ohm

Substitute these values into equation 1

E = (2×3)+(2×0.5)

E = 6+1

E = 7 volts

If an external force and the frictional force are acting on a body, which is in rest on the floor and are equal and opposite, then the frictional force is Static friction.

Answer:

The Magnitude of the angle of reflection equals that of Incidence from the Law of reflection

So its 50°.

Explanation:

Answer: Earth is in a continuous motion in space, spinning as it moves around the sun.

(Hope this helped!)

Answer:

motion in space and moves around the sun

Explanation:

I hope this helps

Answer: unit n/c

Explanation: This should be the answer because I just asked my Physics Teachers I hope this is correct

Hope This Helps :)

The electric field between the plates will be 0.1667×10⁵ C.

An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.

The electric field formula is as follows:

E = F /Q

Where,

The electric field is denoted by the letter E.

F is Electric force

The charge is Q.

Given data;

Q (Charge)= 8.38 × 10¯¹¹ C ,

A (Area between the plates) = 5.68 × 10¯⁴ m²,

ε₀(permeability constant) = 8.85 × 10¯¹² C²/Nm²

[tex]\rm E= \frac{Q}{K \epsilon_0 } \\\\ \rm E= \frac{8.38 \times 10^{-11}}{5.68 \times 10^{-4} \times 8.85 \times 10^{-12} } \\\\ E= 0.1667 \times 10^5 \ N C^{-1}[/tex]

Hence,the electric field between the plates will be 0.1667×10⁵ C.

To learn more about the electric field refer to the link;

https://brainly.com/question/26690770

#SPJ2

Answer:

B: 50 N/m

Explanation:

Hopes it help.

The spring constant of the spring is 50 N/m. The correct option is B.

When the spring is compressed, it gets compressed up to its elastic limit. When load is removed from the spring, it regains its shape and obtains equilibrium position. The energy stored in this process is called as spring potential energy.

Given a spring has 100 J of EPE when it is stretched 2 m. The energy stored in the spring is given by

SPE = ½ kx²

100 = ½ k (2 m)²

k = 50 N/m

So, spring constant of the spring is 50 N/m.

Thus, the correct option is B.

Learn more about spring potential energy.

https://brainly.com/question/12528339

#SPJ2