PHYSICS HIGH SCHOOL

In this graph, calculate the speed of
segment A in m/s?

Answers

Answer 1

Answer:

Answer:

The answer is Speed=2m/s

Explanation:

S=D/T

S=10m/5s

S=2m/s

B

THE EYE OF THE STORM IS CALM

Answer:

b. has warm, calm air and light winds

Explanation:

The eye of a hurricane is calm and "peaceful", it's the region with calm weather. But the eyewall is really dangerous, due to its pressure and speed difference. Actually, the eyewall has the most severe winds and weather. Another important characteristic is that the eye has the lower pressure.

So, among the options, b. is the right answer.

b. has warm, calm air and light winds

5. A graduated syringe contains air. It is put in a freezer to cool it down. When it is removed from the freezer the piston has moved inwards. A. B. C. D. cm 3 cm 0.6 kg/m³ 1.2 kg/m³ 2.4 kg/m³ 4.8 kg/m³ 2 3 The density of the air in the syringe when cooled is 2.4 kg/m³. What was the density of the air at room temperature? piston syringe when cooled syringe at room temperature

Answers

Answer:

The change in the density of the air inside the syringe is due to the change in temperature. When the air inside the syringe is cooled, it contracts, causing the density to increase.

The principle that explains this phenomenon is known as Charles's Law, which states that the volume of a gas is directly proportional to its temperature, provided the pressure and the amount of gas remain constant.

In this case, the density of the air doubles when the syringe is cooled, implying that the volume of the air inside the syringe is halved. Therefore, if the density of the air when cooled is 2.4 kg/m³, the density of the air at room temperature (when the volume is twice as much) would have been half of this value, or 1.2 kg/m³.

So, the density of the air at room temperature was 1.2 kg/m³.

A car of mass m accelerates from speed v_1 to speed v_2 while going up a slope that makes an angle theta with the horizontal. The coefficient of static friction is mu_s, and the acceleration due to gravity is g. Find the total work W done on the car by the external forces.

Answers

Answer:

Work done by external force is given as

$Work_(external) = mgLsin\theta + \mu mgLcos(\theta) + (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

Explanation:

As per work energy Theorem we can say that work done by all force on the car is equal to change in kinetic energy of the car

so we will have

$Work_(external) + Work_(gravity) + Work_(friction) = (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

now we have

$W_(gravity) = -mg(Lsin\theta)$

$W_(friction) = -\mu mgcos(\theta) L$

so from above equation

$Work_(external) - mgLsin\theta - \mu mgLcos(\theta) = (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

so from above equation work done by external force is given as

$Work_(external) = mgLsin\theta + \mu mgLcos(\theta) + (1)/(2)mv_2^2 - (1)/(2)mv_1^2$

Two objects are moving at equal speed along a level, frictionless surface. the second object has twice the mass of the first object. they both slide up the same frictionless incline plane. which object rises to a greater height?

Answers

Answer:

They both rises to same height.

Explanation:

When an object is sliding up in friction less surface than according to conservation of energy its potential energy will be converted into kinetic energy.

$mgH=(1)/(2)mv^(2)\n v=√(2gH)$

Here, m is the mass, v is the velocity, g is the acceleration due to gravity and H is the height.

Here the height is independent on the mass of an object and its only depend on velocity.

Now according to the question, two objects have same velocity but they have different masses.

Therefore, they rises to the same height because height will not change with mass.

Both objects rise to the same height

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Further explanation

Let's recall Kinetic Energy Formula as follows:

$\large {\boxed{Ek = (1)/(2)mv^2} }$

Ek = Kinetic Energy ( Joule )

m = mass of the object ( kg )

v = speed of the object ( m/s )

Let us now tackle the problem !

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Given:

initial speed of first object = initial speed of second object = v

final speed of first object = final speed of second object = 0

mass of first object = m

mass of second object = 2m

Asked:

height = H = ?

Solution:

We will use Conservation of Energy to solve this problem:

$Ep_1 + Ek_1 = Ep_2 + Ek_2$

$0 + (1)/(2)mv^2 = mgH + 0$

$(1)/(2)v^2 = gH$

$v^2 = 2gH$

$\boxed {H = (v^2)/(2g)}$

$\texttt{ }$

$H_1 : H_2 = (v_1^2)/(2g) : (v_2^2)/(2g)$

$H_1 : H_2 = v_1^2 : v_2^2$

$H_1 : H_2 = v^2 : v^2$

$H_1 : H_2 = 1 : 1$

$\boxed{ H_1 = H_2 }$

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Conclusion:

Both objects rise to the same height

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Learn more

Impacts of Gravity : brainly.com/question/5330244
Effect of Earth’s Gravity on Objects : brainly.com/question/8844454
The Acceleration Due To Gravity : brainly.com/question/4189441
Newton's Law of Motion: brainly.com/question/10431582
Example of Newton's Law: brainly.com/question/498822

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Answer details

Grade: High School

Subject: Physics

Chapter: Energy

Type 2 diabetes accounts for _______ percent of all cases of diabetes

Answers

Type 2 diabetes is a common and illness that is largely preventable. In adults, types about 90 to 95 percent of all diagnosed cases of diabetes; the remainder are adult-onset (or adult-diagnosed) type 1 diabetes, a form of diabetes for which the cause is unknown

90-95 Percent, (I took the test and got an 100).

The weather station has issued a warning because there is a tornado in your area. It is traveling northwest at 30 miles per hour. This information describes the tornado's

Answers

The weather station has issued a warning because there is a tornado in your area. It is traveling northwest at 30 miles per hour. This informationdescribes the tornado's velocity, because velocity includes speed and direction.

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