pls help asap. will mark as brainliest if correct

Answer:

E to F

Explanation:

The velocity decreases during segment E to F since the slope of the curve decreases with time.

We have 5 segments in the given graph between position and time. Analyzing each segment we can conclude the following:

Segment A to B: the position remains constant as time increases, this means that the velocity is zero.

Segment B to C: the rate of increase in the position slowly becomes greater as time passes, which means velocity is increasing and the object is accelerating

Segment C to D: The rate of increase in the position is constant with respect to the rate of increase in time, the slope of the curve is constant, which means that the velocity is constant.

Segment D to E: same as the segment A to B, the velocity is zero.

Segment E to F: The rate of increase in the position slowly decreases with time, and the slope of the curve decreases with time, which means the velocity is decreasing.

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Answer:

As the temperature increases, the volume of the material also increases. This is known as thermal expansion. It can also be explained as the fractional change in the length or volume per unit change in the temperature.

The relation between alpha, beta, and gamma is given in the form of a ratio and the ratio is 1:2:3 and can be expressed as:

alpha=fracbeta2=fracgamma3

Following is the relation between the three:

L = L (1 + α.ΔT)

Where, α is the coefficient of linear expansion  

A = A (1 + β.ΔT)

Where, β is the coefficient of aerial expansion

V = V (1 + γ.ΔT)

Where, γ is the coefficient of cubical expansion  

V = V + γV.ΔT

V = V (1 + γ.ΔT)  

L3 = L3 (1 + α.ΔT)3

L3 = L3 (1 + 3α.ΔT + 3α2.ΔT2 + α3.ΔT3)

L3 = L3 (1 + 3α.ΔT)

Alpha, beta, and gamma are related to one another in the form of a ratio, and that ratio is 1:2:3, and yes they are universal constants.

A substance's volume expands while its mass stays constant. Heating is typically the cause of expansion. When a substance is heated, the molecular bonds separating its particles weaken, the particles move more quickly, and the substance expands as a result.

Determine the relation as shown below,

L = L (1 + α × Δ T)

here, α is the coefficient of linear expansion  

A = A (1 + β × Δ T)

here, β is the coefficient of aerial expansion

V = V (1 + γ × Δ T)

here, γ is the coefficient of cubical expansion  

V = V + γ × V × Δ T

V = V (1 + γ × ΔT)  

L3 = L3 (1 + α × Δ T)3

L3 = L3 (1 + 3α × ΔT + 3α2 × ΔT2 + α3 × ΔT3)

L3 = L3 (1 + 3α × Δ T)

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Answer:

A. Rock cycle

Explanation:

Because it really is the change of a rock from another, like ingenuous, sedimentary rock..

Answer:

98N

Explanation:

Given parameters:

Mass of the bowling ball  = 10kg

Mass of the softball  = 1kg

Unknown:

Force of gravity on the bowling ball  = ?

Solution:

The force of gravity on an object is the same as the weight of the body;

 Weight  = m x g

m is the mass

g is the acceleration due to gravity  = 9.8m/s²

 Weight of bowling ball  = 10kg x 9.8m/s²  = 98N

Answer:

La aceleración del automovil antes de deternerse es -5.5 m/s².

Explanation:

Podemos encontar la aceleración del auto usando la siguiente ecuación:

[tex] v_{f} = v_{0} + at [/tex]

En donde:

[tex]v_{f}[/tex]: es la velocidad final = 0 (se detiene)

[tex]v_{f}[/tex]: es la velocidad inicial

a: es la aceleración=?

t: es el tiempo = 4.0 s

Primero debemos encontrar la velocidad inicial, para ellos usaremos la siguiente ecuación de moviemiento rectilíneo uniforme:

[tex] v_{0} = \frac{x}{t} = \frac{110 m}{5.0 s} = 22 m/s [/tex]

Ahora, la aceleración es:

[tex] a = \frac{v_{f} - v_{0}}{t} = \frac{0 - 22 m/s}{4.0 s} = -5.5 m/s^{2} [/tex]

El signo negativo se debe a que el auto está desacelerando.

Entonces, la aceleración del automovil antes de deternerse es -5.5 m/s².

Espero que te sea de utilidad!                          

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:

Explanation:

(a) Electromagnetic waves travels at the speed of light = 3.0 x [tex]10^{8}[/tex] m/s.

v = fλ

where v is the velocity of the wave, f is the frequency, and λ wavelength.

So that;

λ = [tex]\frac{v}{f}[/tex]

  = [tex]\frac{3.0*10^{8} }{87.9*10^{6} }[/tex]

  = 3.413 m

ii. Enegy of the wave can be determined by;

E = hf

where h is the Planck's constant and f the frequency of the wave.

E = 6.626 x [tex]10^{-34}[/tex] x 87.9 x [tex]10^{6}[/tex]

  = 5.82 x [tex]10^{-26}[/tex] J

(b) Refractive index of water = [tex]\frac{velocity of light in air}{velocity of light in water}[/tex]

velocity of light in water = 1.33 x 3.0 x [tex]10^{8}[/tex]

       = 3.99 x [tex]10^{8}[/tex] m/s

Answer:

195 is it current pls tell

hope it helps!

Answer:

Workdone = 1250Nm

Explanation:

Given the following data;

Force, F = 500N

Distance, d = 2.5m

Workdone is given by the formula;

[tex] Workdone = force * distance[/tex]

Substituting into the equation, we have

[tex] Workdone = 500 * 2.5 [/tex]  

Workdone = 1250Nm

Therefore, the actual work done by the worker is 1250 Newton-meter.

The actual work done by the worker is 1250 J.

Work can be defined as the product of force and distance. The s.i unit of work is Joules

The formula of work is

W = Fd....................... Equation 1

Where W = work done by the worker, F = Force, d = distance.

From the question,

Given: F = 500 N, d =  2.5 m

Substitute these values into equation 1

W = 500×2.5

W = 1250 J

Hence, the actual work done by the worker is 1250 J

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Answer:

0.1m

Explanation:

Given parameters:

Frequency  = 12hz

Speed  = 1.2m/s

Unknown:

Wavelength of the wave  = ?

Solution:

The wavelength of the wave can be derived using the expression below;

      V  = f∧

V is the speed of the wave

f is the frequency of the wave

∧ is the wavelength

 So;

         ∧  = [tex]\frac{Velocity}{frequency}[/tex]

Now, insert the parameters and solve;

       ∧   = [tex]\frac{1.2}{12}[/tex]   = 0.1m

Answer:

b. a chair on a floor

Explanation:

All of the other objects are in motion, the jet is flying so it is not at rest, the rabbit is also moving, and a ball hit by a bat is also in motion

Answer:

C. Potential energy is related to an object's position, and kinetic

Explanation:

The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.

Answer:

c. potential energy is related to an object's position, and kinetic energy is related to its motion

Explanation:

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.

Explanation:

Here is the answer,

Lets be BF

The density of solid is 3.842 g/cm³.

Density is the measurement of how tightly a material is packed together. It is defined as the mass per unit volume.

Density Symbol: D or ρ Density Formula: ρ = m/V, where ρ is the density, m is the mass of the object and V is the volume of the object.

Displaced Weight = 277.5 - 212.5

                              = 65 gm

Density = 0.9 g/cm³

Mass = 65 gm

Volume = Mass / Density

             = 65 / 0.9

             = 72.22 cm³

Now,

Density of Solid = 277.5 / 72.22

                          = 3.842 g/cm³.

Hence , The density of solid is 3.842 g/cm³.

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Answer:

Conduction.

Convection.

Radiation.

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:

C is the correct answer

Answer:

If im right the answer should be D

Answer:

A) refused to vote and left the convention.

Explanation:

At the first Democratic Party convention of 1860, fifty Southern delegates refused to vote and left the convention

Answer:

The answer is A

Explanation:

got it right edge 2021

Bernoulli's Principle states that as the speed of a moving fluid increases, the pressure within the fluid decreases. The Bernoulli's Principle explains the behavior of an ideal fluid passing through a pipe or enclosed passageway such a pump.

Explanation:

hope this will help u

Answer:

I'll take this one also

Answer:

a large matters of body with no shape is mass

Răspuns:

1000 kg

Explicaţie:

Date date

t1 = 10 ° C

t2 = 293,15K = până la grad = 293,15-273 = 20,15 ° C

= 20 ° C    aproximativ

Q = 418kJ = 418000J

c = 4180J / kg ° C

m =? Kg

Necesar:

Masa m în kg

Pasul doi:

Formulă:

Q = c * m * Δt

Q = c * m * (t2 -t1)

m = Q / c * (t2-t1)

Calculati:

m = 418000/4180 * (20-10)

m = 100 * 10 kg

m = 1000 kg

In this experiment, the time of an hour is an independent variable, therefore the correct answer is option C

Thermal energy sometimes referred to as heat energy, may be described as the type of energy in which heat is transmitted from one body to another body as a result of their molecular motions.

As given in the problem Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box.

As stated, all three boxes were put on the window for the same amount of time—an hour—so since the time duration for the experiment was the same, it may be considered an independent variable.

Thus, In this experiment, the time of an hour is an independent variable, therefore the correct answer is option C.

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Answer:

The escalator does more work and the elevator has a greater power output.

Explanation:

The escalator does more work on the person because it is carrying them up. It also gives the person a chance to walk up the escalator making it a little more challenging than using just an elevator. The elevator has a greater power output because it can transport a person from one floor to another in just 10 seconds where as the escalator can do it in 15.

Hope this helps!

Answer: A; Precipitate

Explanation:

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.