In a four stroke engine, the piston compresses the gas mixture during the ______ stroke.

Answer : Option C) Heredity; Lifestyle.

Explanation : While some aspects are based on heredity, body composition is largely a result of Lifestyle.

Even though it is believed that 80 percent of the aspects of a human body is heredity, but an individual body composition is largely influenced by the result of the lifestyle an individual lives.

The required magnitude of the instantaneous velocity at t = 4.00 s is 2 m/s.

Velocity is defined as the rate of change in the position of an object with respect to time.

The displacement function of an object s(t) gives the position of the object at time t. To find the instantaneous velocity at a particular time t, we need to find the derivative of the displacement function with respect to time.

In this case, the displacement function is s(t) = 2t + 4. Taking the derivative with respect to time, we get,

v(t) = ds/dt = 2

This means that the instantaneous velocity of the object is constant and equal to 2 m/s at all times. Therefore, the magnitude of the instantaneous velocity at t = 4.00 s is 2 m/s.

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Complete question-

What is the measure of the magnitude of the instantaneous velocity at 4.00 s where displacement is a function of t, s = 2t + 4?

The correct answer is false.

Hope this helps! ;)

Answer:

C

Explanation:

Just took test

Answer:

V = 1.66 L

Explanation:

As we know that at the depth of 10 m the volume of the lungs of diver is given as

V = 2.40 L

Temperature = 32 degree C

Pressure = 101.30 kPa

Now we have change the values of pressure and temperature

Pressure = 141.20 kPa

Temperature = 21 degree C

Now we can use idea gas equation to solve this

[tex]PV = nRT[/tex]

[tex]\frac{P_1V_1}{RT_1} = \frac{P_2V_2}{RT_2}[/tex]

so we have

[tex]\frac{101.30 \times 2.40}{R(273 + 32)} = \frac{141.20 \times V}{R(273 + 21)}[/tex]

[tex]V = 1.66 L[/tex]

Its actually A. I did the same question and A was the correct answer.

There can be unintended consequences to many new biotechnology products so they should be tested extensively before allowed to be used. Option A is correct.

Biotechnology:

It is a field of science that use principles of technology and biology to improve the human lives.

For example-

Therefore, there can be unintended consequences to many new biotechnology products so they should be tested extensively before allowed to be used.

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According to Charles's law, the volume of a fixed amount of gas is directly proportional to its Kelvin temperature, assuming constant pressure. It means that volume of the gas increases with increase in temperature and decreases with decrease in temperature.

According to Charles's law, the volume of a fixed amount of gas is directly proportional to its Kelvin temperature when the pressure is held constant. This law was named after the French scientist Jacques Alexandre César Charles, a pioneer in balloon flight. It essentially means that when the temperature of gas increases under constant pressure, the volume of the gas also increases and vice versa.

For instance, if you raise the gas temperature from 283 K to 303 K at a constant pressure, you will see an increase in its volume from 0.300 L to 0.321 L, corroborating Charles's law.

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Answer:

10

Explanation:

Answer:

curtent

Explanation:

Final answer:

The electrostatic force between two charges increases by a factor of 16 when the distance between them is reduced to a quarter of the original distance, resulting in a new force of 16 N.

Explanation:

The question provided deals with the concept of electric force between point charges, which is described by Coulomb's Law. According to this law, the force F between two point charges is directly proportional to the product of the charges q₁ and q₂, and inversely proportional to the square of the distance r between them. Specifically, F = k * (q₁ * q₂) / r², where k is Coulomb's constant.

In the original scenario, two charges exert a 1.0-N force when separated by a distance of 1.0 meters. When the separation is reduced to 1/4 meter (or 0.25 meters), the distance squared term in Coulomb's Law (r²) becomes (0.25)², which is 1/16 of the original distance squared. Since the force is inversely proportional to the square of the distance, decreasing the distance by a factor of 4 (which squares to be a factor of 16) increases the force by that same factor of 16.

Thus, the new force would be 1.0 N multiplied by 16, resulting in a force of 16 N when the charges are 1/4 meter apart.

Answer:

Partially: From C to D, kinetic energy is transformed into gravitational potential energy and From D to E, gravitational potential energy is transformed into kinetic energy

Explanation:

What happens in this pendulum is that at point A, there's only gravitational potential energy (no velocity=no kinetic energy)

At point C, it has maximum speed since all of the potential energy is transformed into kinetic energy (no potential gravitational  energy at this point)

At point E, it is the same as at point A. (no kinetic energy)

At the intermediate points (B and D) there are both kinetic and potential energy. At point B the kinetic energy is increasing and at point D it is decreasing.

Now let's see each case:

- From A to C, kinetic energy is transformed into gravitational potential energy: It is actually the opposite, so no.

- From C to D, kinetic energy is transformed into gravitational potential energy: Yes, but not all of it is transformed since it still has kinetic energy that allows it to get til point E.

- From C to E, gravitational potential energy is transformed into kinetic energy: No, it is the opposite.

- From D to E, gravitational potential energy is transformed into kinetic energy: Yes, but not all of it, since at point D it also has kinetic energy.

The kinetic energy is transformed into gravitational potential energy from point C to B. But complete transformation is not happening. Thus, the statement is somehow correct.

The analysis of pendulum is given as follows:

Now as per the given statements:  

Thus, we can conclude that from C to D, the kinetic energy is transformed into gravitational potential energy, but the transformation is not complete. Hence, statement (B) is correct.

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A gas does work by changing its volume, adhering to the law of conservation of energy and resulting in increases in energy, pressure, and/or temperature.

A gas can do work by changing its volume. When a gas in a cylinder expands, it exerts a force on the piston and moves it, doing work. According to the Ideal Gas Law, work done by a gas results in an increase in its energy, which can manifest as an increased internal kinetic energy due to the motion of its atoms and molecules. This concept adheres to the law of conservation of energy, meaning that energy within a closed system is neither created nor destroyed, but can change forms. An example of work being done by a gas is when you inflate a bicycle tire; the air pressure and temperature increase inside the tire due to the work done by the pump.

Thus, the correct answer to how a gas does work is A. By changing volume.

Given:

Distance of alpha century = 4 light year

Speed of light = 3 × [tex] 10^{8} [/tex] m

To find:

Time taken by light to reach earth = ?

Formula used:

Distance = speed × time

Solution:

Distance = 4 light year

Converting distance from light year into meter

1 light year = 365 × 24 × 60 × 60

4 light year = 4 × 365 × 24 × 60 × 60× 3 ×[tex] 10^{8} [/tex]

As we know,

Distance = speed × time

s = v × t

Where s = distance

v = velocity

t = time

So,t = [tex] \frac{s}{v} [/tex]

t = [tex] \frac{4 × 365 × 24 × 60 × 60× 3 ×[tex] 10^{8} [/tex]}{3 ×[tex] 10^{8}} [/tex]

t = 4 × 365 × 24 × 60 × 60 second

t = 4 year

Thus, Time taken by light to reach earth from alpha century is 4 earth year.

A) amperes

B) current.  

C) gravity.  

D) voltage.

correct. D) Voltage is the change in electric potential energy per unit charge. It is sometimes called the electric potential difference

Voltage is called as the change in electric potential energy per unit charge which is called as the electric potential difference. So, the correct option is D.

Voltage is also called electric pressure, electric tension or potential difference which is defined as the difference in electric potential between two points. This corresponds to the work required per unit charge to move a test charge between two points in a static electric field.

Voltage is called as the change in electric potential energy per unit charge which is called as the electric potential difference. The SI unit for voltage is Volt which is represented by the letter v which derived SI unit of the electromotive force or electric potential.

Therefore, the correct option is D.

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Your question is incomplete, most probably the complete question is:

The change in electric potential energy per unit charge is

A) amperes

B) current.  

C) gravity.  

D) voltage

At it's nucleus,the milky-way galaxy is about 100,000 light-years wide and 10,000 light-years thick

hope this helps

Answer: Displacement sailboat

Displacement sailboat are stable even in strong water current for it was designed to glide through the water smoothly with a minimum of power for they have smooth lines and curves that gently move water out of its way. In displacement boat, the water moves gradually where less resistance against the boat is created and the boat ride is smooth and safer.

Final answer:

A skydiver in free fall describes constant acceleration in one direction since gravity provides a constant acceleration downwards near Earth's surface.

Explanation:

The question asks which scenario describes constant acceleration in one direction. The correct answer is a skydiver in free fall. This is because, near the surface of the Earth, an object in free fall experiences a constant acceleration due to gravity, with a magnitude of approximately 9.8 m/s².

The direction of this acceleration is vertically downwards, and it remains constant in both magnitude and direction in the absence of air resistance.

In contrast, a car rounding a bend, a merry-go-round increasing speed, or a pendulum swinging all experience changing directions or types of motion which do not represent constant acceleration in one direction.