You need to move a large refrigerator. It has a mass of 300 kg. You want to accelerate it at a rate of 3 m/s/s. What force must you apply?

Initial speed u= 0.0 m/s

Final speed v= 5.0 m/s

Time t1= 4.5s

Time for constant speed t2=4.5s

d = d₁ + d₂

1 = ( v+u/2) × 1₁ + v × 1₂

v = final speed

u = initial speed

t₁ = time for first accelerates

t2 = time for constant speed

d = (5+0/2) × 4.5+ 5.0 x 4.5

d = 33.75m

so, the total distance traveled by the bike is 33.75 m.

# 1

[tex]\bold{a = \frac{(5-0)}{4.5} = 1.11 m/s^2 }[/tex]

[tex]\bold{ v = 0 + a \: t = 1.11 \times 4.5 = 5 }[/tex]

[tex]\bold{ d = 0 + 0 (4.5) + (\frac{1}{2})(1.11)(4.5)^2 =11.2 }[/tex]

# 2

[tex]\bold{ a = 0 }[/tex]

[tex]\bold{ v = 5 }[/tex]

[tex]\bold{ d = 11.2 + 5 (4.5) + 0}[/tex]

[tex]\bold{ = 11.2 + 22.5 = 33.7 meters}[/tex]

Answer:

amount and speed of traffic on the acceleration lane and expressway.

Answer:

The Electric Force on Negative Charge is 2.968 N

Explanation:

charge on each corner, q = 2.38 micro coulomb

Side of square, a = 75.2 cm

Coulombic constant, K = 8.98755 x 10^9 Nm²/C²

sides of the square are A,B,C and D

and all sides of a square are equal so

AB = BC = CD = DA = 75.2 cm = 0.752 m

Diagonal, AC = BD = 1.414 x 0.752 = 1.06 m

Electric field at D due to charge at A

EA= Kq÷AB^2

= 8.98755×10^9 × 9.87×10^-6 ÷ 0.752^2

EA= 156863.82 N/C

Similarly Electric field at D due to charge C

EC=Kq÷CD^2

= 8.98755×10^9 ×9.87×10^-6 ÷ 0.752^2

EC= 156863.82 N/C

Electric field at D due to charge at BB

EB=Kq÷BD^2

EB=8.98755×10^9 × 9.87×10^-6 ÷ 1.06^2

EB=78949.01 N/C

Resolve the compoents

Ex = EA + EB cos 45

Ex = 156863.82 + 78949.01 x 0.707

Ex = 212689.2 N/C

Ey = EC + EB Sin 45

Ey = 156863.82 + 78949.01 x 0.707

Ey = 212689.2 N/C

The resultant electric field is

E = 1.414 x 212689.2 = 300787.95 N/C

the electric force on the negative charge is

F = q x E

F = 9.87 x 10^-6 x 300787.95

F = 2.968 N

The light oscillates electrons which then absorbs some of the energy and reemit it thereby causing a delay.

This is defined as a subatomic particle which has a negative charge. In the glass of water the light oscillates the electrons which absorbs some energy.

The re-emission is what slows light when it passes from air into glass or water.

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The distance between the sun and a planet can be gotten by measuring its orbital period and applying the Kepler's law.

According to Keplers third law; the cube of the distance between a planet and the sun is directly proportional to the square of the period of the same planet.

Having said that, we know that we can best measure the distance between the sun and a planet by measuring its orbital period and applying the Kepler's law.

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Answer:Answer is A:The energy from the waves of light coming from bright lights would add up and free an electron.

Explanation:

1. They collect evidence and make sure that the model can be used with reasoning to explain the evidence.

2. The energy from the waves of light coming from bright lights would add up and free an electron.

3. The spots are the result of interference, which happens with waves but not particles.

4. This is not something that waves do because they need a medium to travel through, while particles do not.

5. When the electromagnetic wave peaks overlap, a bright fringe forms.

I promise this is correct because i failed and this is what it said if this is ever wrong they must have changed the quick check

Answer:

The first reactant is methane, the next is oxygen, the first product is carbon dioxide and the second product is water.

The word equation is:

methane + oxygen → carbon dioxide + water

The balanced symbol equation is:

CH₄ + 2O₂ → CO₂ + 2H₂O

Explanation:

In any combustion reaction, fuel is burned in the presence of oxygen to produce carbon dioxide and water.

An equation is balanced when there are the same number of atoms of each element on both sides of the arrow.

Hope this helps!

Answer:

B) sublimation

Explanation:

An example is the vaporization of frozen carbon dioxide (dry ice) at ordinary atmospheric pressure and temperature.

Answer:

sublimation

Explanation:

sublimation, in physics, conversion of a substance from the solid to the gaseous state without its becoming liquid. An example is the vaporization of frozen carbon dioxide or dry ice(CO2)

or Solid Chlorine (Cl2) at ordinary atmospheric pressure and temperature. The phenomenon is the result of vapour pressure and

temperature relationships.

Please Mark me Brainiest

Answer:

It is called Motion Energy

Explanation:

Answer:

Explanation:

Answer:

is there a picture? so I can understand it more and it will be easier for me to answer. thank you

Answer:

The second one is more accurate because we were able to draw more precisely and accurately, the first picture was more of a general idea of the picture and the second picture was more of a detailed version.

Explanation:

I just did this assignment and this is what I turned in so yeah I hope this is good enough, if you need more of an explanation though ill try to lengthen it. =]

Answer:

1 / f = 1 / i + 1 / o             1 / f = (o + i) / i o

f = i o / (o + i)

f = -26.5 * 8.25 / (8.25 - 26.8)

f = -221 / -.308 = 11.8 cm

Answer:

W = 1/2 x P x E

Explanation:

Let :

Formula

Solving

Let's see

[tex]\\ \rm\rightarrowtail W=P\vec{E}(cos\theta_i-cos\theta_f)[/tex][tex]\\ \rm\rightarrowtail W=P\vec{E}(cos0-cos60)[/tex]

[tex]\\ \rm\rightarrowtail W=P\vec{E}(1-1/2)[/tex]

[tex]\\ \rm\rightarrowtail W=\dfrac{P\vec{E}}{2}[/tex]

Blood travels through the body in tubes called arteries and veins.

Blood vessels are tubes through which the blood circulates in the body. Blood vessels include the following;

Thus, we can conclude that blood travels through the body in tubes called arteries and veins.

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Answer:

B. has the greatest mass

Explanation:

mass & distance affect pull

grativy affects speed & shape of orbit of the planet

quiziz

Answer:

200 Nm

Explanation:

Work Done by Particular Force = Particular Force × Distance

The composite figure is a combination of a rectangular pyramid and a rectangular prism, hence its volume is 140in³.

A rectangular prism is simply a three dimensional solid shape with six faces that are rectangles.

Volume of a rectangular prism is expressed as;

V = w × h × l

Where l is length, h is height and w is width

A rectangular pyramid is simply a three-dimentional object with a rectangular shaped base and triangular shaped faces that correspond to each side of the base.

The volume of rectangular pyramid is expressed as;

V = (1/3) × l × w × h

Where l is the base length, w is the base width and h is the height of the pyramid.

From the diagram below;

First we calculate the volume of a rectangular prism.

V = w × h × l

V = 3in × 4in × 7in

V = 84in³

Hence, the volume of the rectangular prism is 84in³.

Next, we calculate the volume of rectangular pyramid.

V = (1/3) × l × w × h

V = (1/3) × 7in × 3in × 8in

V = (1/3) × 168in³

V = 56in³

Hence, the volume of the rectangular pyramid is 56in³.

Volume of the composite figure = Volume of prism + Volume of pyramid

Volume of the composite figure = 84in³ + 56in³

Volume of the composite figure = 140in³

Therefore, the composite figure is a combination of a rectangular pyramid and rectangular prism, hence its volume is 140in³.

Learn more about volume of pyramids here: brainly.com/question/21308574

Answer:

See below

Explanation:

KE = 1/2 m v ^2

    = 1/2 (250/1000) 300^2   j         the bullet is 250/1000  kg  ( assuming g is grams and not GRAINS - in which bullet weight is usually measured)

force to stop it is the same number

PE = mgh = .5 *9.81  *  .75 =

     doubling height will double PE

2 x 10^6  =  40 * 9.81  *  h      sove for 'h' in meters  

Initial kinetic energy is 11250 J and magnitude of force to stop bullet is 75 N.

The GPE for 0.75m height floor is 3.75J.

The GPE for double of 0.75m height is 7.5J.

The high on which 40 kg mass is lifted is 5000m.

The kinetic energy of an object is the energy that it possesses due to its motion.

[tex]KE = 1/2 m v ^2[/tex]

      [tex]=1/2 (250/1000) 300^2 J\\= 11250 J[/tex]

Work done,

[tex]W= fs\\\\f=\frac{W}{s}\\\\f=\frac{11250}{150}[/tex]

[tex]f=75 N[/tex]

Gravitational potential energy is the potential energy a massive object has in relation to another massive object due to gravity.

PE = mgh

    = .5 *9.81  *  .75

    = 3.75 J

Potential energy when height doubles = 7.5J

The potential energy is given by

[tex]PE = mgh\\\\h = PE/ mg\\\\h = 2*10^6 J /40*9.8\\\\h = 5000 m[/tex]

To learn more about Kinetic and potential energy here

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Answer: i would say true uwu

Explanation:hope this helps!

  ....Max-

Answer:

Balanced forces do not result in any change in motion.

Explanation

forces applied to an object in opposite directions that are not equal in size. Unbalanced forces result in a change in motion. friction the force that opposes the motion or tendency toward motion of two objects that are in contact.

Answer:

balanced forces are equal in size and opposite in direction

Answer:

When oil is spilled in the sea it will normally break up and be dissipated or scattered into the marine environment over time. This dissipation is a result of a number of chemical and physical processes that change the compounds that make up oil when it is spilled. The processes are collectively known as weathering.

Hope This It What You Wanted :)

The sound intensity level of 100 physics professors talking simultaneously is equal to 72 decibel.

Given the following data:

Sound intensity can be defined as a measure of the power of a sound wave per unit area. Thus, sound intensity is a quantity that can be used to measure the energy of sound and its unit of measurement is Watts per square meter.

Mathematically, sound intensity level is given by this formula:

[tex]\beta = 10 log(\frac{I}{I_{ref}} )[/tex]

Note: The reference value of sound intensity is equal to [tex]1.0 \times 10^{-12}\;W/m^2[/tex]

Thus, the sound intensity for one (1) professor is given by:

[tex]I_1 = 1.0 \times 10^{-12} \times 10^{5.2}\\\\I_1=1.585 \times 10^{-7}\;W/m^2[/tex]

For 100 professors, the sound intensity is:

[tex]I_{100} = 1.585 \times 10^{-7} \times 100\\\\I_{100}=1.585 \times 10^{-5}\;W/m^2[/tex]

Substituting the parameters into the formula, we have;

[tex]\beta = 10 log(\frac{1.585 \times 10^{-5}}{1.0 \times 10^{-12}})\\\\\beta = 10 log(15.58 \times 10^{6})\\\\\beta = 10 \times 7.2\\\\\beta =72\;dB[/tex]

Read more on sound intensity here: https://brainly.com/question/17062836

Complete Question:

One physics professor talking produces a sound intensity level of 52 dB. It's a frightening idea, but what would be the sound intensity level of 100 physics professors talking simultaneously?

Answer:

72dB

Explanation:

The sound intensity level of one prof is given, that's your β1 (which is equal to 52dB).

Using the sound intensity level formula:

β1= 10log ([tex]\frac{I}{I_{o} }[/tex]) = 52 dB

*This will be useful later on [even if β1 is known]

Set up the formula for β2 (β2 is going to be the new sound intensity, the one for the 100 profs):

β2 = 10 log( [tex]\frac{ 100 I}{I_{o} }[/tex] )

*You need to multiply the intensity of one professor by 100 (because now there's more)

*do some algebra- pull out the 100

β2  = 10 log (100 [tex]\frac{I}{I_{o} }[/tex])

*use log laws

β2 = 10 ( log(100) + log ([tex]\frac{I}{I_{o} }[/tex]) )

*Now, isn't there a familiar part? Well, yes! The expression for β1!

β2 = 10log(100) + β1

β2 = 10log(100) + 52dB

*use your calculator

β2 = 73dB

^^^ that's your new sound intensity level

Force(F) = 150N

Mass(m) = 90kg

Acceleration(a) = ?

F= m×a

[tex]150 = 90 \times \text{a} \\ \\ \text{a} = \frac{150}{90} \\ \fbox{cancelling by 3} \\ \\ \text{ a} = \cancel \frac{150}{90} \\ \\ \text{ a} = \frac{5}{3} = 1.67 \text{m/s} {}^{2} [/tex]

[tex] \therefore \text{Option A= 1.67 m/s² is the correct answer}[/tex]

Answer:

A. 1.67 m/s2

Explanation:

F = m*a, so a = F/m = 150/90 ≈ 1.67 [tex]m/s^2[/tex]

Based on the information provided, the Power of the electric forklift to the nearest hundred is 12,000 W.

The formula for calculating power in physics is given as:

P = E/t; where P = Power, E is energy and t is time in seconds. It is also given as :

P = W/Δt

Recall that power is defined as the amount of work done within a specific amount of time.

Where W = Work and; Δt = time elapsed.

Recall that Work (w) = Force x distance

Force here is usually domiciled in Newtons while distance is usually domiciled in meters.

7000 pounds or Lbs to Newtons is

7000 x 4.4482216153 = 31137.551307 N

So let's convert the distance to Meters.

1 foot = 0.3048m

Therefore, 76ft = 23.1648 m

Thus, Work = 31137.551307 X 23.1648 (That is Force in Newtons x distance in meters.)

Work = 721, 295.148516 N·m

Recall that power is given as:

P = W/Δt

= 721,300/60 seconds

= 12,021.6666667, to the nearest hundred, and we have:

P = 12,000 W

Learn more about Power at:
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Answer:

D.

Explanation:

The answer should be D. because if it increases by a factor of 2 then it will decrease at a factor of 4.

I hope it helps! Have a great day!

Anygays-

Answer:

36.04N

Explanation:

accelerating force: mass × acceleration

F=ma

m=212/10= 21.2kg

a=1.7m/s2

F=21.2×1.7

=36.04N

Answer: When you speak into the can, your voice creates air vibrations that travel into the can, vibrate the bottom of the can, which in turn vibrates the string all the way over to the other can, in turn vibrating the other can's bottom, then the air again.

Explanation:

Answer:

An induced magnetic field is always opposed to the change that produced the magnetic field.

Thus, such a bar magnet will be slowed on its descent thru the pipe because it will produce a current in the pipe that will produce a magnetic field in an opposite direction to the field that produced the current.

(a repelling magnetic field will produce a force that opposes the force producing it - otherwise one has a way to produce pertpetual motion)

Answer:

See below ↓

Explanation:

We know that the energy of a wave is directly proportional to the amplitude of a the wave. That means it directly varies, so when one increases/decreases, the other does the same.

Therefore, when the amplitude of a wave is doubled, the energy of the wave is also doubled.

Similarly, in the case of the frequency of the wave, it is also directly proportional to the energy of the wave.

⇒ E ∝ ν