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3 years ago

Difference between diurnal and annual motion in two points

Physics

1 answer:

Valentin [98]3 years ago

5 0

Answer:

Explanation below:

Explanation:

Annual motion describes the changes in motion of the earth around the sun. Diurnal motion can be better understood as the change in motion caused by Earths rotation at the poles.

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A charge Q acts on a point charge to create an electric field. Its strength, measured a distance of 40 cm away is 100 N/C. What

KIM [24]

Answer:

$E_2=80N/C$

Explanation:

From the question we are told that:

Initial Distance $d_1=40cm=>0.4m$

Initial Electric field strength $E_1=100N/C$

Final Distance $d_2=20cm=>0.20m$

Generally the equation for Electric field is mathematically given by.

$E=\frac{kq}{d^2}$

$q=\frac{100*(0.4)^2}{K}$

Substituting q for $d=20cm$

$E_2=\frac{k}{0.2}*\frac{100*(0.4)^2}{K}$

$E_2=80N/C$

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3 years ago

A 1500-kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered by the engine? (1 hp = 746 W) A) 50 hp

sergeinik [125]

Answer:

power, P = 90 hp

Explanation:

It is given that,

Mass of the car, m = 1500 kg

Initial velocity of car, u = 0

Final velocity of car, v = 25 m/s

Time taken, t = 7 s

We need to find the average power delivered by the engine. Work done divided by total time taken is called power delivered by the engine. It is given by :

$P=\dfrac{W}{t}$

According to work- energy theorem, the change in kinetic energy of the energy is equal to work done i.e.

$W=\Delta E=\dfrac{1}{2}m(v^2-u^2)$

$P=\dfrac{\dfrac{1}{2}m(v^2-u^2)}{t}$

$P=\dfrac{\dfrac{1}{2}\times 1500\ kg\times (25\ m/s)^2}{7\ s}$

P = 66964.28 watts

Since, 1 hp = 746 W

So, P = 89.76 hp

P = 90 hp

So, the average power delivered by the engine is 90 hp. Hence, the correct option is (E) " 90 hp".

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4 years ago

List at least 5 examples of civil rights

mariarad [96]

Answer:

right to vote, the right to a fair trial, the right to government services, the right to a public education, and the right to use public facilities.

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3 years ago

A person strikes a ball with a bat. The temperature of the ball increases by 0.06ᵒC. What accounts for the increase?

marusya05 [52]

The increase in the average kinetic energy of the ball causes the increase in the temperature of the ball.

Kinetic energy of a particle is directly proportional to its temperature.

A ball initially at rest acquires kinetic energy when an external force is applied to it. As the person strikes the ball with a bat, the ball gains momentum which increases its kinetic energy of the ball.

Temperature on the other hand, is the measure of the average kinetic energy of a particle. Consequently, as the kinetic energy of the ball increases, the temperature of the ball increases as well.

Thus, we can conclude that the increase in the average kinetic energy of the ball causes the increase in the temperature of the ball.

Learn more here: brainly.com/question/18833622

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3 years ago

Are gases more or less dense than liquids or solids at room temperature?

tigry1 [53]

<span>Solids are denser than liquids, and liquids are denser than gases at room temperature. </span>

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4 years ago

Difference between diurnal and annual motion in two points​

Difference between diurnal and annual motion in two points