PLEASE HELPPPPPPPPPP​

Answer:

The automobile's acceleration in that time interval is -2 m/s^2

Explanation:

The acceleration is defined as the rate of change of the velocity.

The average acceleration in a given lapse of time is calculated as:

A = (final velocity - initial velocity)/time.

In this case, we have:

initial velocity = 31 m/s

final velocity = 15 m/s

time = 8 seconds.

Then the average acceleration is:

A = (15m/s - 31m/s)/8s = -2 m/s^2

Answer:

kinetic energy

Explanation:

vinegar and baking soda are composed of atoms which react to each other when mixed therefore they convert the potential energy inti kinetic energy.

Answer:

i'm sorry i'm not a physics student

Question 1.

now, we know :

=》

[tex]p.e = mgh[/tex]

=》

[tex]67500 = 4500 \times 10 \times h[/tex]

=》

[tex]67500 = 45000 \times h[/tex]

=》

[tex]h = \dfrac{67500}{45000} [/tex]

=》

[tex]h = 1.5 \: m[/tex]

note : if we take acceleration due to gravity as 9.8, then height = 1.53 m

Question 2.

we know,

=》

[tex]k.e = \dfrac{1}{2} mv {}^{2} [/tex]

=》

[tex]63000 = \dfrac{1}{2} \times 4500 \times {v}^{2} [/tex]

=》

[tex] {v}^{2} = \dfrac{63000 \times 2}{4500} [/tex]

=》

[tex] {v}^{2} = 28[/tex]

=》

[tex]v = \sqrt{28} [/tex]

=》

[tex]v = 2 \sqrt{7} \: \: ms {}^{ - 1} [/tex]

or

=》

[tex]5.29 \: \: ms {}^{ - 1} [/tex]

Answer:

Artificial silk or art silk is any synthetic fiber which resembles silk, but typically costs less to produce.

Explanation:

Answer:

Artificial silk or art silk is any synthetic fiber which resembles silk, but typically costs less to produce. Frequently, "artificial silk" is just a synonym for rayon. When made out of bamboo viscose it is also sometimes called bamboo silk.

Answer:

I think it is C

Explanation:

If the temperature of a gas increases, the gas particles have a higher average speed as they gain kinetic energy. They collide more frequently with the walls of the container, which produces a bigger pressure.

Answer:

that one i know only pe not that sorry again

Answer:

the velocity is decreasing therefore acceleration is negative

Answer:

  [tex]\frac{Y}{Y_o}[/tex] = 2/3

Explanation:

The yuong modulus of a rod is defined as the relationship between the tensile strength and the strain

         Y =  [tex]\frac{ \frac{F}{A} }{\frac{\Delta L}{L_o} }[/tex]

let's use the subscript "o" for rod A

         I = [tex]\frac{ \frac{F}{A_o} }{ \frac{\Delta L}{L_o} }[/tex]

tells us that rod B has

         A = 3 A₀

         L = 2 L₀

we substitute

         Y = [tex]\frac{ \frac{F}{A} }{ \frac{\Delta L}{L} }[/tex]

          Y = [tex]\frac{ \frac{F}{3A_o} }{ \frac{\Delta L}{ 2L_o} }[/tex]

         y = ⅔  [tex]\frac{ \frac{F}{A_o}}{ \frac{\Delta }{L_o} }[/tex]

substituting the value of Y₀

          Y = ⅔  Y₀

           [tex]\frac{Y}{Y_o}[/tex] = 2/3

Answer:

the force that the car’s tires exerted on the road is 2,666.67 N.

Explanation:

Given;

mass of the car, m = 1,200 kg

initial velocity of the car, u = 0

final velocity of the car, v =  10.0 m/s

time of motion, t = 4.50 s

The force the car’s tires exerted on the road is calculated as follows;

[tex]F = ma= \frac{m(v-u)}{t} \\\\F = \frac{1200(10-0)}{4.5} \\\\F = 2,666.67 \ N[/tex]

Therefore, the force that the car’s tires exerted on the road is 2,666.67 N.

Answer:

ummmmmmmmmmmm ask your teacher or perant for help

Explanation:

so umm ask an adult or teen figure and maybe you will get it write not sure do

Answer:

the impulse experienced by this object is 4 Ns

Explanation:

Given;

mass of the object, m = 3 kg

velocity of the object, v = 4 m/s

resistive force, F = 20 N

duration of impact, t = 0.2 s

The impulse experienced by this object is calculated as follows;

J = F x t

J = 20 x 0.2

J = 4 Ns

Therefore, the impulse experienced by this object is 4 Ns

Answer:

==> C. represent troug of a transverse wave

is the correct answer of this question

hope it helps

Answer:

Amontons's law. If the temperature is increased, the average speed and kinetic energy of the gas molecules increase. ... If the gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases, both of which increase the pressure exerted by the gas

Explanation:

CAUSAS:

-El gobierno de chile ha destinado el 2% de sus recursos de salud pública para tratar los problemas de salud mental,lo cual es insuficiente debido a la alta demanda de pacientes que requieren atención especializada. Según la OMS (organización mundial de la salud) , cada gobierno debería destinar al menos el 5% de sus recursos para tratar este tipo de patologías o enfermedades mentales como la depresión,la ansiedad u otros trastornos bipolares

- El personal capacitado para tratar este tipo de enfermedades es muy escaso.

- Muchos de los chilenos que padecen este tipo de enfermedades no buscan ayuda inmediata, algunos recurren al alcohol o a los vicios como el cigarrillo o la marihuana , pensando que lograrán calmar la ansiedad o sus preocupaciones pero en realidad sucede lo contrario, aumentan   la depresión y la ansiedad.

-Los problemas sociales, la crisis económica y el aumento de la pobreza así como el limitado acceso que tiene la población pobre chilena a un buen sistema de salud integrado,genera un significativo aumento de problemas de salud mental  en especial en la población pobre o más desfavorecida del país.

CONSECUENCIAS:

Debido a los problemas de salud mental las incapacidades laborales han aumentado, afectando  la economía  del país.

Debido a la falta de tratamiento ,el suicidio y otras enfermedades como la esquizofrenia han aumentado. De igual manera la violencia intrafamiliar se ha incrementado e inclusive hasta los niños están empezando a sufrir este tipo de trastornos o enfermedades mentales,lo cual está afectando su desempeño escolar.

Answer:

Find the letter below.

Explanation:

                                                                                1237 Richmond Avenue,

                                                                                Houston, Texas,

                                                                                U.S.A.

                                                                                3rd May, 2021.

The Principal,

Carnegie Vanguard High School,

Houston, Texas,

U.S.A.

Dear Sir,

           APPRECIATION FOR THE ADMISSION OFFER IN YOUR SCHOOL

          I humbly write this letter to express my sincere appreciation for the offer of admission in your highly esteemed institution of learning. The admission letter states that I was admitted to pursue a programme in Computer Science and this is a source of great delight for me. The opportunity is a unique one because I stand a great chance of acquiring deeper knowledge of programming software that will prove invaluable to me in my future career.  

         Over the years, I have been particularly thrilled with all the inventions that have been made possible with information technology and programming of many useful software. These inventions have made life a lot easier, hence my interest in getting the required knowledge that will enable me to contribute my quota to the society.

         This programme will also afford me the opportunity to relate with seasoned professionals in the field of Information Technology. When in contact with these professionals, I hope to ask them several questions on programming, the technicalities involved in it, and what is obtainable in the real-world scenario. Armed with these pieces of information, I believe that the programme will shape me to be an excellent professional that will be useful to the society.

         Once again, thank you for this very special opportunity. I hope to fully maximize the privilege.

Yours Sincerely,

Jessica Liam.

Answer:

ΔT = 28.667°C is the answer.

Explanation:

Given,

Mass of water = 4.0 kg

Water is heated by = 8 × 10² W = 800 W

Time = 10 min = 10 × 60 = 600 s

Now,

using the equation of specific heat,

Q = mcΔT

where c is the specific heat capacity of water = 4186 J/kg°C

Q = Pt

Substituting,

Pt = mcΔT

800 × 600 = 4 × 4186 × ΔT

480000 = 16744 × ΔT

ΔT = 28.667

∴Temperature increased, ΔT = 28.667°C

Answer:

accurate it means trying to find accurate or exact value. or tends to find exact value,

Explanation:

Explanation:

A 4kg mass is under the action of a resultant force of (a) 4 N (b) 8N and (c) 12 N What are the resulting accelerations?

Given that,

Mass, m = 4 kg

(a) Force = 4 N

We know that,

Force, F = ma

Where

a is accelertaion,

a= F/m

a = 4/4 = 1 m/s²

(b) F = 8 N

a= F/m

a = 8/4 = 2 m/s²

(c) F = 12 N

a = 12/4 = 3 m/s²

Hence, this is the required solution.

Answer:

F = 600 N

Explanation:

The second law is F = m * a

The mass (m) is in kg = 120

The acceleration in in m/s^2 = 5

The force is in Newtons.

m and a do not require any conversions. They are in the correct units.

F = 120 * 5

F = 600 N

Explanation:

velocity = wavelength × frequency => v= f1 × λ => f1 = v/ λ

λ = stays the same

v = doubles

2v = f2 × λ

2v/λ = f2

now ,

f2/f1= 2vλ/ vλ = 2

f2 = 2f1

therefore frequency is doubled

Answer:

snowman

Explanation:

the snowman has more heat energy as it has more molecules whilst the burning match has less. therefore its has more total kinetic (moving) energy

Answer:

The inside of a hurricane

Explanation:

You will die

Answer:

skateboard mid-ollie is being actively steered. This is exactly what makes doing an ollie so hard. It's not enough to get the skateboard up into the air - you also have to steer it while it's in the air. You should keep your hands up in the hair a bit to help with balance, scrunch your legs a bit down to have a proper and effective jump. wear nee pads incase you dont fix the landing. Practice jumping on ur skate board tho, if u jump at it without knowing much youll just get hurt.

Explanation: