How much time is needed for a car to accelerate from 8.0 m/s to speed of 22 m/s if the acceleration is 3.0 m/s^2?

Answers

Answer 1

Answer:

The time needed to accelerate the car from 8.0 m/s to a speed of 22 m/s will be 4.67 seconds.

What is acceleration?

Acceleration of any object is defined as the variation in the speed of the object with the variation of the time. Acceleration is a vector term and to define it we require both the magnitude and the direction. The unit of the acceleration can be m / sec², miles / sec², etc.

Given that, for a car to accelerate from 8.0 m/s to a speed of 22 m/s the required acceleration is 3.0 m/s²

The time to accelerate the car will be calculated as below:-

Acceleration = (final velocity - initial velocity)/ time taken

Time taken = (final velocity - initial velocity)/ acceleration

Time taken = (22-8)/3 = 4.67 seconds

Therefore, the time needed to accelerate the car from 8.0 m/s to a speed of 22 m/s will be 4.67 seconds.

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Answer 2

Answer: acceleration = (final velocity - initial velocity)/ time taken
so, time taken = (final velocity - initial velocity)/ acceleration
= (22-8)/3 = 4.67 seconds

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A solid aluminum cube has sides each of length L . A second cube of the same material has sides four times the length of the first cube; i.e., 4 L . Compared to the first cube, the total surface area of the second cube is 1. twenty-seven times the first cube. 2. sixteen times the first cube. 3. sixty-four times the first cube. 4. eight times the first cube. 5. twenty-four times the first cube. 6. two times the first cube

Answers

Answer:

Option (2): Sixteen times the first cube

Explanation:

$Surface \: Area \: of \: Cube = 6 {a}^(2)$

$(T.S.A \: of \: larger \: cube)/(T.S.A \: of \: smaller \: cube) = \frac{6 * 16 {l}^(2) }{6 * {l}^(2) } = 16$

When the linear dimensions of a solid are multiplied by ' R ', the surface area of all or any part of it increases by R² , and the volume of all or any part of it increases by R³ .

If the sides of the second cube are 4 times the sides of the first one, then the second cube has (4²) = sixteen times the surface area of the first one (2), and it has (4³) = 64 times the volume of the first one.

In a transverse wave that travels through a medium, the molecules of the medium vibrateA. at right angles to the direction in which the wave travels.
B. at twice the velocity of the molecules in a longitudinal wave.
C. with smaller amplitudes than the molecules in a longitudinal wave.
D. in the direction in which the wave travels

Answers

So we wan't to know how the molecules of the medium vibrate when a transverse wave propagates trough that medium. A transverse wave is a wave whos oscilations are perpendicular to the direction of it's propagation. So the molecules in a medium will vibrate perpendicular to the direction of propagation of the wave. So if the wave is moving in the x-direction, the molecules will vibrate in the y-z plane. The correct answer is A. at right angles to the direction in which the wave propagates.

What is the advantage of a gold leaf electroscope ?

Answers

It's to determine if there is a charge on an object/body or not and what kind of charge as well. Hope this can help!

Which statement best describes an antacid? a)An antacid increases the amount of hydrogen ions b)An antacid neutralizes excess hydrogen ions. c)An antacid decreases the level of hydrogen ions.

Answers

Answer:

The correct answer is option A, An antacid neutralizes excess hydrogen ions.

Explanation:

Antacid neutralizes the acid in the stomach. These are bases/ alkali's. The reaction between an acid and a base in known as neutralization thereby reducing burning sensations produced by the acid.

The antacid when reaches the stomach form gel like composition that lie on the top of food item in the stomach and prevent the oesophagus from the irritation caused by the acid.

Answer: option A

Explanation: ur welcome

APEX What is one advantage of using primary sources when doing research on anexperiment?
A. They are summaries of many scientists' work.
B. They include the opinions of many scientists.
C. They contain more details about the experiment.
D.They are always easier to read.

Answers

One advantage of using primary sources when doing research on an

experiment is they contain more details about the experiment. The correct option is C.

What are primary sources?

Primary sources are the one which are first hand sources. They are more reliable, so they are more reliable and detailed about the experiment.

Primary sources are the sources which produce their own energy to let other objects emit the same. Just like, Sun, it has has its own light and heat energy. It is reliable and can be experimented with more details.

Thus, the correct option is C.

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Answer:

Explanation:

They are first hand sources so they are more reliable and detailed...

_______ was the first person to propose the idea of moving continents as a scientific hypothesis. A. Antonio Snider-Pelligrini
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Answers

B.Alfred Wegener was the first person to propose the idea of moving continents as a scientific hypothesis.

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