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Answer:

Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. Inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.

Explanation:

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A hanging 7.5 kg object stretches a spring 1.1 m, the spring constant of the spring is approximately 66.82 N/m.

Hooke's Law, which states that the force exerted by a spring is directly proportional to the displacement of the spring from its equilibrium position, can be used to compute the spring constant.

F = -k * x

Here, we have:

mass (m) = 7.5 kg,

displacement (x) = 1.1 m,

acceleration due to gravity (g) = 9.8 m/[tex]s^2[/tex].

We know that:

weight (W) = mass * acceleration due to gravity

So,

W = m * g

W = 7.5 kg * 9.8 m/[tex]s^2[/tex]

W = 73.5 N

F = W = 73.5 N

F = -k * x

73.5 N = -k * 1.1 m

Solving for k:

k = -73.5 N / 1.1 m

k ≈ 66.82 N/m

Thus, the spring constant of the spring is approximately 66.82 N/m.

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Answer:

to find the slope you need to find the change in distance then you divide by the corresponding change in time

eg

( 4-2) ÷ (2-1)

= 2m/s

Answer: Well the charges in 9c are positive so  5c is th force between the two making the ansewr

Explanation:

Answer:

C    (3RD OPTION)

Explanation:

E2020

Answer:

The input force (effort) is the amount of effort used to push down on a rod, or pull on a rope in order to move the weight. In this example, the force the little guy is using to pull the elephant is the input force.

Explanation:

negotiation.

SANA MAKATULONG.

In the conflict resolution, promotes competition a win-lose outcome. Competition results into conflict when two parties tend to seek control over a situation.

Competition results when one's own needs are advocated over the needs and requirements of others. It relies on an aggressive style of communication, which is of low regard for future relationships, and the exercise of coercive power. Those who are using a competitive style tend to seek control over a situation, in both the substance and ground rules.

There are times, when competition between two individuals can escalate into an unproductive, and dangerous conflict. The danger can range from unproductive behavior of a person to unethical behavior which could include physical attack. This results into a win-lose outcome.

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Answer:

roots

Explanation:

i think this is the incomplete page that you are showing but the answer is

:-

Explanation:

its means the quantity in question is a scalar quantity, has only magnitude but no direction, for example. speed,has no reference to direction of motion, since the speed of a body say 5 m/s( the direction of the body has not been stated) but the velocity of a body say 5m/s to the east has a reference to direction of the motion.

That's why velocity is different from speed

Answer:

If a coil of wire is placed in a changing magnetic field, a current will be induced in the wire. This current flows because something is producing an electric field that forces the charges around the wire. (It cannot be the magnetic force since the charges are not initially moving). ... that determines the induced current.

Answer:

Studies show that eating fewer animal-based products could reduce water use since animal production uses more water than crops do. In addition, reducing the amount of food that's lost or wasted at various points in the food supply chain could feed about 1 billion extra people while simultaneously reducing water use.

Answer:

Amiodarone

Explanation:

Answer:

A) rational kinetic energy is conserved

For the scenario painted below Rational kinetic energy is conserved

Option A is correct

Kinetic energy is simply defined as the energy that an item or particle has as a result of its movement.

In conclusion, For A longboard is free to slide on a sheet of frictionless ice. and a skater skates to the board and hops onto one end, causing the board to slide and rotate. In this situation Rational kinetic energy is conserved

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Answer:

Explanation:

Remark

The only thing that might trip you up is what to do with the angle. The vertical component of the 15 degrees does no work against anything. So the 15 degrees limits the horizontal force.

The formula is

Work = F * d * cos(15)

The givens are

F = 2000 N

d = 30 m

Cos(15) = 0.9659

Solution

Work = 2000 * 30 * cos(15)

Work = 57,955

Rounded to two places would be 5.8 * 10^4

C

Answer:

the one made from aluminum

Explanation:

Answer:

Energy conversion

Explanation:

We regularly use automobile which runs on the chemical energy of the fuels such as diesel and petrol, the chemical energy from the fuel would convert into the thermal energy which is used to drive the engine of the vehicle,further the thermal energy converted into the mechanical energy which is used to drive the prime mover of the automobile.

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

We frequently utilize vehicles that operate on chemical energy from fuels like diesel and gasoline.

This chemical energy is transformed into thermal energy, which drives the engine of the vehicle, and then mechanical energy, which drives the prime mover of the vehicle.

Thus, we can say that the transfers and transformations of energy are necessary to operate the technology.

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Answer:

By Newton's second law, it reduces the magnitude of the acceleration, without changing its direction.

F = unbalanced force

m = mass

a = acceleration

a = F/m

Answer:

about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula a spinning, swirling disk of material.

Explanation:

Answer: B- A and C

Explanation:

A P E X

The optical devices uses light. The correct option for the optical devices can form images that are larger than the original object is B i.e A and C.

The device which uses light for the meaningful purpose is called optical devices.

The device which form the images larger than the object are the converging type of lens or mirror.

The lens which is converging is the convex lens denoted by C in diagram and the converging mirror is the concave mirror denoted by A.
Therefore, the correct option for the optical devices can form images that are larger than the original object is B i.e A and C.

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Answer:

DNA Fingerprinting is all I could find

Answer: 0.15 m/s

Explanation:

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Answer:

It is negativity charged

Answer:

positively charged

Explanation:

a wool has neutral charges hence when rubbed against a balloon it will generate positive charges

Answer:

I = 1.09 A

Explanation:

Here, 5 ohm and 12 ohm resistor are connected in parallel. Using the parallel combination of resistors as follows :

[tex]\dfrac{1}{R}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\\\\\dfrac{1}{R}=\dfrac{1}{5}+\dfrac{1}{12}\\\\ R=3.52\ \Omega[/tex]

Now R and 2 ohm resistors are in series. Let the equivalent be [tex]R_{eq}[/tex]. So,

[tex]R_{eq}=3.52+2\\\\=5.52\ \Omega[/tex]

Let I be the current. Using Ohm's law,

V = IR

[tex]I=\dfrac{V}{R_{eq}}\\\\I=\dfrac{6}{5.52}\\\\I=1.086\ A[/tex]

or

I = 1.09 A

So, the correct option is (c).

frequency is equal to number of oscillations or vibrations upon time

therefore,

check picture

Answer:

a. Constructive interference.

b. [tex]0.34\; \rm m[/tex].

c. [tex]0.68\; \rm m[/tex].

d. [tex]1.02\; \rm m[/tex].

Explanation:

Frequency of this sound wave: [tex]f = 250\; \rm Hz = 250\; \rm s^{-1}[/tex].

Speed of this sound wave: [tex]v = 340\; \rm m \cdot s^{-1}[/tex].

Calculate the wavelength of this sound wave:

[tex]\begin{aligned} \lambda &= \frac{v}{f} \\ &= \fraac{340\; \rm m \cdot s^{-1}}{250\; \rms^{-1}} \approx 1.36\; \rm m\end{aligned}[/tex].

Path difference refers to the absolute value of the difference between:

When the observer in this question is on the line between the two speakers at [tex]d[/tex] meters from the midpoint, the corresponding path difference would be [tex]2\; d[/tex] meters. (Add [tex]d\![/tex] to the distance from the closer source, and subtract [tex]d\!\![/tex] from the distance from the other source.)

The question states that sound from the two speakers are in-phase. In other words, at every instant, the sound wave from the two speakers are at the same phase at the position of each speaker.

Because wave from the two sources are in-phase at the source:

Path difference is [tex]0[/tex] when the observer is at the midpoint. That would correspond to constructive interference.

The first destructive interference (minimum intensity) corresponds to a path difference of [tex]\lambda / 2[/tex]. Along the line, that would be observed at [tex](1/2) \cdot (\lambda / 2) = 0.34\; \rm m[/tex] from the midpoint.

The next constructive interference (maximum intensity) would be observed when path difference is [tex]\lambda[/tex]. Along the line, that would be observed at [tex](1/2)\cdot \lambda = 0.68\; \rm m[/tex] from the midpoint.

The second destructive interference (minimum intensity) would be observed when path difference is [tex](1 + (1/2))\, \lambda[/tex]. Along the line, that would be observed at [tex](1/2) \cdot ((3/2)\cdot \lambda) = 1.02\; \rm m[/tex] from the midpoint.