A Yugo can accelerate from rest to a speed of 28 m/s in 20 s. What is the average acceleration of the car? What distance does it travel in this time

Answers

Answer 1

Answer:

Explanation:

a=28/20

a=1.4 m/s²

V²=v0²+2a.D

28²=0+2x1.4D

784 = 2.8D

D = 280 m


Related Questions

state any two factors affecting pressure in liquids​

Answers

Answer:

Density of liquid (ρ)

Depth of liquid (h)

Acceleration due to gravity (g)

Explanation: Pressure within a liquid depends only on the density of the liquid, the acceleration due to gravity, and the depth within the liquid.

Answer:

depth

height

acceleration due to gravity




How many electrons have been removed from a positively charged electroscope if it has a net charge of 6x10-11?


pls help !!!


Answers

How much negative charge has been removed from a positively charged electroscope if it has a charge of 7.5x10-11C?

If C is Coulombs then, −1 C is equivalent to the charge of approximately 6.242×10^18 electrons.

You already gave the answer: -7.5x10–11C

It is like asking: What colour is my white horse?

Now if you want to know how many electrons have been removed, then multiplying the number of electrons in a coulomb by the coulombs you have, you get 4.6815 x 10^8 electrons. Which is almost the same answer as before.

3.7 x 10^8 electrons are removed from a positively charged electroscope.

The magnitude of charge carried by one electron is 1.602 x 10^-19 C

From the question, we can see that the net charge on the electroscope is 6 x 10^-11 C

Given that;

6 x 10^-11 = 1.602 x 10^-19 n

Where n is the number of electrons removed from a positively charged electroscope

Therefore;

n = 6 x 10^-11/ 1.602 x 10^-19

n = 3.7 x 10^8 electrons

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How much work is done when 0.0042C is moved through a potential difference of 12.0V? Use W = qV
A. 2900J
B. 12J
C. 0.00035J
D. 0.050J

Answers

Answer:

Work done by charge (W) = 0.050 (Approx)

Explanation:

Given:

Charge (q) = 0.0042 C

Potential difference(V) = 12.0 V

Find:

Work done by charge

Computation:

Work done(W) = qV

Work done by charge (W) = (0.0042)(12)

Work done by charge (W) = 0.0504

6. A surface receiving sound is moved from its original position to a position three times fa
received sound thus becomes
O A. three times lower
O B. nine times lower.
O C. three times higher.
O D. nine times higher.

Answers

Answer: Answer is D

Explanation:

A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes nine times as low.

A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes nine times lower . Option(B) is correct.

What is intensity of sound?

The power of sound per unit area is used to define sound intensity. The measurement of sound intensity in the air is the typical context. The surface of the sound source also plays a role. The kinetic energy of the mass of air is produced by the source's and the vibrating surface's increasing amplitudes.

With the air's mass vibrating and with its average speed, this kinetic energy rises. The distance from the sound source affects how strongly the ear perceives a sound. The characteristics of the elastic medium between a sound source and the ear also affect intensity. The sounds are weakened by non-elastic materials like wool, felt, etc.

Mathematically: sound intensity = acoustic pressure/normal area to the direction of propagation.

So, when a surface receiving sound is moved from its original position to a position three times farther away from the source of the sound, its normal area becomes 9 times larger and intensity of the received sound thus becomes nine times lower .

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How much power does it require to do 200 J of work in 5 s?

Answers

Answer:

soln

work done= 200J

Time taken = 5 sec

power=?

We know that,

power=w/t

= 2000/5

= 400W

Explanation:

hopw this will help you

Which best describes why projectiles move in a curved path?
A) They have constant horizontal velocity and vertical acceleration.

B) They have horizontal acceleration and constant vertical velocity.

C) They have horizontal momentum and constant vertical velocity.

D) They have horizontal acceleration and vertical momentum.

Answers

Answer:

A. The have horizontal velocity and vertical acceleration.

Explanation:

Projectiles move in a curved path because : ( A ) They have constant horizontal velocity and vertical acceleration

Projectile movement

Projectiles move in a curved path due to constant horizontal velocity and vertical acceleration due to gravity that acts on it. Projectile movement starts when an object is thrown/projected into the air. The object thrown into the air will travel in a curved path  known as trajectory.

Hence we can conclude that Projectiles move in a curved path because They have constant horizontal velocity and vertical acceleration.

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What can be seen in a crowd, in the ocean, and
felt under ground?

Answers

Answer: Convection currents in the molten mantle cause the plates to slowly move about the Earth a few centimeters each year. Many ocean floor features are a result of the interactions that occur at the edges of these plates.

Explanation:

The convection currents can be seen in a crowd, in the ocean, and can also be felt underground.

A convection current simply means the process that has to do with the movement of energy from one particular place to another.

A convention current is also known as convection heat transfer. Convention currents are due to differential heating. This brings about the circulation patterns that are referred to as convection currents that can be found in the atmosphere, water, and the mantle.

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a. Define displacement
b. Use the definition of displacement to explain how it is possible for an athlete to run round a track yet have no displacement

Answers

Answer:

definition: the moving of something from its place or position.

Explanation:

though moving around a track they will always end in the same place therefore there is no displacement from the beginning position

There is no displacement from the starting position because they will always wind up in the same place as they started.

What is displacement?

Displacement is defined as the overall alteration of an object's location and motion direction. Displacement is recognized as a vector quantity since it takes into account both the direction of the motion and the magnitude of the changing position. Displacement may be zero, positive, or negative.

The initial and final positions are needed in order to calculate displacement because displacement does not provide comprehensive information on the full path length.

The displacement is the shortest distance from the starting point to the finish point, the athlete starts from the start line and reaches the finish line after running through the whole track, but the starting point and the finishing point are the same, so the displacement is zero.

Therefore, the displacement of the athlete running through the track is zero for a complete race.

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Un perro de rescate parte del campamento en búsqueda de una persona extraviada. Se desplaza 3 km al Este, 2.5 km al Norte, 3.5 km al Suroeste y 2 km al Sur, siguiendo la ruta del caminante. ¿A qué distancia y en cuál dirección a partir del campamento se encontraba la persona perdida?

Answers

Answer:

2.9 ok ezzzzzzzzzzzzzzzzzzzzzzz

a car was traveling at 30.0 m/s when a small child darted onto the road 60.0 m away. Reacting instantly the driver slams the brakes. a) How much time would it take to stop if it was able to stop in exactly 60.0 m?

Answers

2 seconds,,,,,,,,,,,,,,,,,,,,,,,

A meter stick of uniform material has some dough stuck on one end. The stick has a mass of 0.1 kg. It will balance when supported at a point 0.33m from the dough. How much mass does the dough have?

Answers

At the equilibrium or balance point the meter stick stationary and the sum of the moments and forces acting on it is zero

The mass of the dough is .[tex]\underline {51.\overline{51}}[/tex] grams

Reason:

Known;

Length of the stick = 1 meter

Mass of the stick, m = 0.1 kg

Point the stick will balance when the dough is at one end = 0.33 m

Required:

How much mass does the dough have

Solution:

The meter stick is balanced when the clockwise moment and the anticlockwise moment about the balance point are equal

Let M, represent the mass of the dough, we have;

The center of mass of the meter stick = The 0.5 m point

Taking moment, we have;

[tex]\mathbf{\sum M_{clockwise} = \sum M_{anticlockwise}}[/tex]

Distance from the center of mas of the ruler to the fulcrum, d₁ = (0.5 - 0.33) m

Distance from the dough to the fulcrum, d₂ = 0.33 m

Clockwise moment, [tex]\mathbf{\sum M_{clockwise} }[/tex] = m × d₁

Anticlockwise moment, [tex]\mathbf{\sum M_{anticlockwise} }[/tex] = M × d₂

Therefore;

(0.5 - 0.33) × 0.1 = M × 0.33

Therefore, we get;

[tex]M = \dfrac{(0.5 - 0.33) \times 0.1}{0.33} =\dfrac{17}{330} =0. 0\overline{51}[/tex]

The mass the dough has, M = 0.0[tex]\overline{51}[/tex] kg = 51.[tex]\underline{\overline{51}}[/tex] grams

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what is an asteroid called that is smaller than a couple meters wide?

Answers

Answer:

Meteoroids

Explanation:

Meteoroids are significantly smaller than asteroids, and range in size from small grains to one-meter-wide objects. Objects smaller than this are classified as micrometeoroids or space dust.

The term by which an asteroid called is smaller than a couple of meters wide is a meteorite.

What are meteorites?

A meteorite is a small group of rocks and debris. They are made by the collection of dust and small pebbles. They are smaller than asteroids, and they are formed in outer space, and they fall on earth from outer space, and when they fall into the earth with that great speed, they attain heat.

Meteorites also consist of metals, like nickel, carbides, sulfides, etc. It has been said that in old times the meteorite that contain iron, fall into the earth and the iron from them melted into the core of the earth. They are of different shapes and sizes.

Thus, the term by which an asteroid called is smaller than a couple of meters wide is a meteorite.

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a. They are measured from the Prime Meridian in a and direction. These lines are known also as

Answers

Answer:

meridians

     Imaginary lines called meridians that measure distances East and West of the Prime Meridian. Longitude is different from latitude. Longitude may also be referred to as meridians. Although they measure the distance from East and West, the lines run in the direction of north and south.

Explanation:

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if the kinetic energy of a particle is tripled, by what factor has its speed increased?

Answers

Answer:

KE1 = 1/2 m v1^2

KE2 = 3 KE1 = 3 * 1/2 m v1^2 = 1/2 m v2*2

3 v1^2 =  v2*2

v2 = 3^1/2 v1

Which of the following statements accurately describe a scientific law?
there is no contradictory evidence in the current body of knowledge
it is an educated guess about how a process occurs
can be updated or rejected if any contradictory evidence is found
it is an statement that is true in many, but not all, cases
it is an observation that has been made many times

Answers

Answer:

The first statement appears most accurate.

The last statement also appears accurate, but it does not preclude any contradictory evidence.

The following statements accurately describe a scientific law: There is no contradictory evidence in the current body of knowledge. It is a statement that is true in many, but not all, cases. It is an observation that has been made many times.

The other statements do not accurately describe a scientific law:

"It is an educated guess about how a process occurs" describes a scientific hypothesis or theory, not a law.

"Can be updated or rejected if any contradictory evidence is found" describes the nature of scientific theories, which can be revised or discarded based on new evidence, but laws tend to remain consistent.

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Why doesn’t an orbiting satellite fall back to earth?

Answers

The reason satellites don’t fall from the sky is because they are orbiting Earth. Even though the satellites are thousands of miles away, Earths gravity still tugs on them. Gravity combined with the satellite's momentum from its launch into space, cause the satellite to go into orbit above Earth instead of falling back down to the ground.
P.S sorry if this isn’t the answer you were looking for have a good day

What are the characteristics of metals? *

Answers

Metals are lustrous, malleable, ductile, good conductors of heat and electricity.

Answer:

Good conducters of heat and electricity. High melting points. high density. malleable. Ductile.

Explanation:

Describe how kinetic energy is needed to increase the system's potential energy.

Answers

Answer:

kinetic energy is needed for potential energy since without kinetic energy potential energy would not have the potential energy to do anything

sorry if it doesn't make sense

Explanation:

youre holding a ball in the sky that is potential energy since it has the potential to fall. the kinetic energy is when it falls and lastly the potential is when it hits the floor..

I need help filling this in​

Answers

Answer:

smaller and further from

Explanation:

Pass light through something clear and light, you'll most likely be able to see all of it's rays spread out, the "normal." Now, pass it through something dense, the amount of light will shrink, therefore be further from the "normal."

PLZ HELP THIS IS FOR AN UNIT
Paul road his bike from the bottom of his street to his friend’s
house at the top of the hill on his street. He knew his PE was
5,000 J and ME was 25,000 J but wanted to find out his KE.
What is Paul’s KE energy on his bike ride to his friend’s house?

Answers

Answer:

5,000+25,000=

Explanation:

You need to plus it answer it now go girl #CarryOnLearning

help yall this is serious-

Answers

Answer:

convection: heat transfer by movement of currents inside a liquid, currents in the mantle, temp inside the house, red dye rises blue dye sinks,

radiation: heat from a bonfire, transfer of energy through space,

conduction: frying pan to cooking egg, candle heating up foil to chocolate chips

Explanation:

A box of Thanksgiving presents slides across a waxy floor at 20m/s. It comes to a stop in 4 seconds. What distance did the box travel across the floor?

Answers

Answer:

V = d/t = 20

20=d/4 so d = 80

What happens to the density of a fluid as it temperature increases/decreases?

Answers

Let's look at the density of water at 25 deg C and compare that to a higher temperature, 80 deg C. The density decreases from 0.9970 g/mL to 0.9718 as it is heated. This makes sense because, as heat is added to the liquid water, there is greater kinetic energy of the molecules and there are also more vibrations of the water molecules. Together these mean that each H2O unit in liquid water takes up more space as the temperature increases.

You escape the evil car pushing cat and leave him back behind you in the road. He tries to chase you, though. He weighs 2kg and his legs apply 50N of force. How fast does he accelerate?

Answers

Answer:

25 m/s²

Explanation:

F = m × a

50 N = 2 kg × a

a = 50 N : 2 kg

a = 25 N/kg

a = 25 m/s²

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7. Navy use SONAR method to locate the position of submarine under water. The waves used in SONAR are A transverse waves. B electromagnetic waves. C. audible to human ear. D.audible to navy only.​

Answers

Answer:

A. transverse waves

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if a 5,000 investment earn $1,575 interest over over 18 years what is the annual interest rate

Answers

Answer:

I = 1575 / 5000 = 31.5 % interest on investment

(1 + i)^18 = 1.315      where i interest is earned per year

One can use logs or

1 + i = 1.315^1/18  = 1.0153

So the annual interest rate is .0153   or 1.53%

Or

5000 (1 + i)^18 = 6575

(1 + i)^18 = 1.315

18 log (1 + i) =  log 1.315

log (1 + i) =  .006607

1 + i = 1.0153

i = .0153 = 1.53%

Physics 2.4.3 lab, please help, i just need this so i could move on to the next unit. 75 points if you could please do this

Answers

Answer:

There are only 38 points.

Explanation:

why are you saying 75?

What is the average velocity of a car traveling South on a straight road for two hours returns to the starting point after three hours.

Answers

The average velocity of the car traveling south and later returned to the starting point is 0.

Average velocity is defined as the change in displacement per change in the time of motion.

Average velocity is calculated as follows;

[tex]v = \frac{\Delta x}{\Delta t} = \frac{x_2 - x_1}{t}[/tex]

Let the initial displacement of the car, x₁ = 20 m

Let the final displacement of the car, x₂ = 20 m (since the car returned to the starting point).

The average velocity is calculated as;

[tex]v = \frac{x_2 - x_1}{t} = \frac{20 - 20}{5} = 0[/tex]

Thus, the average velocity of the car traveling south and later returned to the starting point is 0.

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why do we need to know physical and chemical change?

Answers

It is important to understand the differences between physical and chemical changes. ... It helps to think of physical changes as those involving changes that don't change the make up of the substance, while chemical changes are those that create a new substance. Physical Changes involve energy.

Which has the lowest coefficient of friction?


cast iron on cast iron

glass on glass

nonstick coating on steel

steel on steel with castor oil

Answers

Answer: nonstick coating on steel

Explanation:

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