how is finding the volume of a composite figure like finding the surface area of a composite figure?

Answer:

High run off, low evaporation

Explanation:

High run off and low evaporation causes flood because if evaporation is low, there won't be changing of liquid water to gas or vapor meaning water will be in abundance and if there is much water in abundance it can lead to flooding. High run off can result in flooding if rainfall water overwhelm the capacity of the drainage system i.e the water is more than what the drainage system can carry, it can result in flooding.

Answer:

high runoff, low evaporation, low precipitation

Explanation:

High run off and low evaporation causes flood because if evaporation is low, there won't be changing of liquid water to gas or vapor meaning water will be in abundance and if there is much water in abundance it can lead to flooding. High run off can result in flooding if rainfall water overwhelm the capacity of the drainage system i.e the water is more than what the drainage system can carry, it can result in flooding.

Answer:

0 becouse it will still before falling

Explanation:

For the right block to balance the forces and remain steady, it needs to weigh 7.9 kg.

The force is an external agent which is applied to the body or an object to move it or displace it from one position to another position.

When there is no net force acting on the system, the two blocks stay in place. In this instance, the strain in the rope holding the two blocks together balances the pull of gravity on them. The sine of the angles, along with the masses of the blocks, can be used to calculate the tension in the rope.

\(T= (m_1 \times g) \times sin(\theta_1) + (m_2\times g) \times sin(\theta_2)\)

Substituting the known values:

\(T = (10 \times 9.8 )\times sin(23^o) + (m_2\times 9.8 )\times sin(40^o)\)

Solving for m₂:

\(m_2= \dfrac{(T- (10 \times 9.8 )\times sin(23^o)} { (9.8\times sin(40^o))}\)

The mass of the right block must be 7.9 kg for the two blocks to remain stationary.

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The question is -

Two blocks in the Figure below are at rest on frictionless surfaces What must be the mass of the right block so that the two blocks remain stationary? 4.9kg 6.1kg 7.9kg 9.8kg

Given, mass of the man, m=60kg

Kinetic energy of the man, E

k

=750J

If v is the velocity of the man, then

E

k

=

2

1

mv

2

or v=

m

2E

k

=

60

2×750

=5m/s

Answer:

\({ \bf{kinetic \: energy = \frac{1}{2}m {v}^{2} }} \\ { \tt{ 750= \frac{1}{2} \times 60 \times {v}^{2} }} \\ { \tt{ {v}^{2} = 25 }} \\ \\ { \tt{v = \sqrt{25} }} \\ { \bf{velocity = 5 \: m {s}^{ - 1} }}\)

An engine moves a boat through the water at a constant speed of 15 m/s. The engine must exert a force of 6.0 kN to balance the force that the water exerts against the hull. Power is the measure of how fast work can be done. The unit of power is watts (W), which can be defined as the amount of work done in one second.

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Answer:

The equivalent resistance of the combination is R/100

Explanation:

Parallel Connection of Resistances

If resistances R1, R2, R3,...., Rn are connected in parallel, the equivalent resistance is calculated as follows:

\(\displaystyle \frac{1}{R_e}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+...+\frac{1}{R_n}\)

The electric resistance of a wire is directly proportional to its length. If a wire of resistance R is cut into 10 equal parts, then each part has a resistance of R/10.

It's known the 10 parts or resistance R/10 were connected in parallel, thus the electric resistance is:

\(\displaystyle \frac{1}{R_e}=\frac{1}{R/10}+\frac{1}{R/10}+\frac{1}{R/10}+...+\frac{1}{R/10}\)

Note the sum consists of 10 equal terms. Operating on each term:

\(\displaystyle \frac{1}{R_e}=\frac{10}{R}+\frac{10}{R}+\frac{10}{R}+...+\frac{10}{R}\)

The sum of 10 identical fractions yields 10 times each fraction:

\(\displaystyle \frac{1}{R_e}=10\frac{10}{R}=\frac{100}{R}\)

Solving for Re needs to take the reciprocal of both sides of the equation:

\(R_e=R/100\)

The equivalent resistance of the combination is R/100

The correct statements include:

option A, B, C, D

The Incorrect statements include:

Different types of electromagnetic radiation are fundamentally different types of waves. (All types of electromagnetic radiation are fundamentally the same type of wave but have different frequencies and wavelengths.)

The only type of electromagnetic radiation that is actually considered light is visible light. (All types of electromagnetic radiation are considered light, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.)

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Answer: A B C D

Explanation: k12 I had this quiz

Answer:

Direct variation suggests that two variables change in the same direction, when one variable decreases the other increases.

The mass and energy of the wood before burning would be equal to the energy and matter of the ash, soot, heat and light after burning.

The law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another.

While burning of wood, the chemical energy in the wood is released as heat because of the chemical reaction of wood and oxygen.

This type of chemical reaction is called combustion and it requires oxygen. Combustion converts the stored chemical energy in the wood into heat and light energy.

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The height of the point where it hits the ball is 20.171 m.

When a batter hits a ball high in a baseball game,

Time till the ball remains in the air, t = 4.06 seconds.

The acceleration of gravity, g = 9.8 m/s².

The vertex value of time is half of the time, the ball remains in the air

i.e. \(\frac{4.06}{2}\) = 2.03 s

Final velocity (v) at the maximum height will be 0

So, According to the First Equation of Motion:

v - u = gt

u = - gt

u = -9.8 × 2.03

u = -19.894 m/s

Now, by using the Second Equation of Motion:

v² - u² = 2gh

Since v = 0

\(h = \frac{u^{2} }{2g}\)

h = \(\frac{19.894^{2} }{2 * 9.81}\)

h = 20.171 m

The ball will rise 20.171 meter high.

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During a quiet inspiration, the approximate increase in the diameter of chest circumference is 1-2 cm. On the other hand, during a forced inspiration, the approximate increase in the diameter of chest circumference is around 6-10 cm.

The temporary physiological advantage created by the substantial increase in chest circumference during forced inspiration is that the amount of air inspired into the lungs can increase.

This increase in the amount of air inspired is also known as the vital capacity of the lungs and is very important in situations where more oxygen is required, such as during exercise. It allows for a greater amount of oxygen to be taken into the lungs and distributed to the body's tissues and organs.

In summary, during a quiet inspiration, the diameter of chest circumference increases by approximately 1-2 cm, while during a forced inspiration, the diameter of chest circumference increases by around 6-10 cm. The substantial increase in chest circumference during forced inspiration creates a temporary physiological advantage by allowing for a greater amount of air to be inspired into the lungs, which in turn increases the amount of oxygen taken into the body.

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Answer:

it g hope it helps you out

(a) If you double your driving speed,  time required to come to a stop will be halved (b) the distance needed to stop will be quadrupled.

Deceleration is defined as a decrease in velocity. Deceleration is slowing down. Negative acceleration is acceleration in the negative direction in the coordinate system. Negative acceleration may/ may not be deceleration and deceleration may /may not be negative acceleration.

If the brakes in a car create a constant deceleration, then time required to come to a stop is directly proportional to velocity, while the distance needed to stop is proportional to square of the velocity. So, if you double your driving speed, the time required to come to a stop will be halved, while the distance needed to stop will be quadrupled.

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Answer:

I need help with this

Explanation:

Radio telescopes must be larger than optical telescopes because of the longer wavelengths of radio waves, which result in a lower diffraction limit.

The diffraction limit of a telescope is determined by its aperture size, or the diameter of its collecting area. For the Hubble Space Telescope, the diffraction limit for visible light is approximately 0.05 arcseconds. This means that the telescope can resolve structures or details that are separated by at least 0.05 arcseconds of an angle.

On the other hand, radio telescopes are much larger than optical telescopes because radio waves have longer wavelengths than visible light. The diffraction limit of a radio telescope is proportional to the wavelength of the radiation it observes. Because radio wavelengths are much longer than those of visible light, radio telescopes must be much larger in order to achieve the same level of resolution as optical telescopes.

In addition, radio telescopes can detect emissions from much larger structures in space, such as galaxies and clusters of galaxies. These emissions are typically very weak and difficult to detect, so radio telescopes must have a large collecting area in order to detect them.

To sum up, radio telescopes must be larger than optical telescopes because of the longer wavelengths of radio waves, which result in a lower diffraction limit, and the need to detect weak radio emissions from large structures in space.

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Answer: The charges must be like charges (both positive or both negative).

Explanation:

Rita applies an average force of 24 Newton to the ball during the kick.

Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).

Given that Rita accelerates a 0.40-kg ball from rest to 9.0 m/s during the 0.15 s.

The acceleration of the ball = change in speed / time interval

= ( final speed - initial speed) / time interval

= ( 9.0 m/s - 0 m/s)/0.15 s

= 60m/s^2.

Hence, according to Newton's 2nd law of motion:

The average force applied to the ball = mass × acceleration

= 0.40 kg × 60m/s^2.

= 24 Newton.

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The given statement "The first law of thermodynamics is that in a closed system energy moves from being concentrated to being spread out" is not completely accurate. This is because it does not give a complete explanation of the First Law of Thermodynamics.

The First Law of Thermodynamics is the conservation of energy principle. It states that energy can neither be created nor destroyed, only transferred or converted from one form to another. The First Law of Thermodynamics may be stated as "The total energy of an isolated system is constant; energy can be transformed from one form to another, but cannot be created or destroyed."Therefore, the correct answer is "False". This statement only gives an incomplete idea about the First Law of Thermodynamics.

The First Law of Thermodynamics is one of the most fundamental laws of thermodynamics. It states that the total energy in a closed system is conserved, meaning that energy can neither be created nor destroyed, but can be transferred or converted from one form to another. The energy transfer or conversion between different forms can occur via heat, work, or internal energy.

The law can be expressed mathematically as ΔU = Q - W, where ΔU is the change in internal energy of the system, Q is the heat transfer to the system, and W is the work done by the system. The First Law of Thermodynamics can be applied to various processes, including isothermal, adiabatic, isobaric, and isochoric processes. The First Law of Thermodynamics also has implications in various fields, including physics, chemistry, and engineering. It is an essential concept in the study of thermodynamics and is used to describe energy transfer and transformation in various systems. Therefore, the First Law of Thermodynamics is a critical principle that helps explain many phenomena in our world.

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ANSWER

False.

EXPLANATION

In radioactive decay (or nuclei decay), an unstable nucleus emits radiation into a nucleus that is table and has less energy and a lower mass.

Therefore, nuclei decay from a less stable form to a more stable form.

The answer is false.

Number of oxygen molecules in each breath is 2.9X10^21

Given that the volume of air inside a breath (V) = 6.0×10^−4 m^3

oxygen in fresh air = 20%

volume of oxygen in fresh air = 20/100 x 6.0×10^−4 = 1.2x10-4m^3

pressure in the lungs (P)=  1.0×10^5 pa

Temperature of air (T) =300K

Using ideal gas equation find the number of moles of oxygen

PV = nRT

Then n = 1.0×10^5 x  1.2x10-4 / 8.314 x 300 = 4.8x10-3mol

We know the number of molecules in 1 mol is 6.023x10^23

Then the number of molecules in 4.8x10-3mol of oxygen is =

4.8x10-3molx 6.023x10^23 = 2.9x10^21

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To solve this problem, you can use the equation for the conservation of energy, which states that the initial potential energy of the spring plus the work done by friction is equal to the final kinetic energy of the block.

The initial potential energy of the spring is given by 0.5kx1^2, where k is the force constant of the spring and x1 is the initial compression of the spring.

The work done by friction is equal to the force of friction times the distance over which it acts, which is given by µkmg*x1, where µk is the coefficient of kinetic friction, m is the mass of the block, g is the acceleration due to gravity, and x1 is the distance the block moves before coming to rest.

The final kinetic energy of the block is given by 0.5mv^2, where m is the mass of the block and v is the final velocity of the block.

You can set up the equation as follows:

0.5kx1^2 + µkmgx1 = 0.5m*v^2

Substituting the given values, we have:

0.5400.3^2 + µk29.810.3 = 0.52*v^2

Solving for µk, we find that:

µk = (0.5400.3^2 - 0.52v^2)/(29.810.3)

The maximum extension x2 of the spring is equal to the distance the block travels, so we can substitute x2 for v:

µk = (0.5400.3^2 - 0.52x2^2)/(29.810.3)

Substituting the value of x2, we find that:

µk = (0.5400.3^2 - 0.520.2^2)/(29.810.3)

Simplifying, we find that:

µk = 0.2

Therefore, the answer is 0.2, letter B.

We automatically process space time frequency by how events occur and how they interact with each other.

Space refers to the amount of physical space between objects or events. Time is the measurement of the duration of events or processes. Frequency is a measure of how often a particular event or process occurs. By understanding these three components, we can accurately process the space, time, and frequency of events.

We automatically process space, time, and frequency through our brain's ability to quickly analyze and interpret sensory information. Our perception of space, or the distance between objects, is determined by our brain's ability to analyze visual cues such as size, depth, and perspective.

Our perception of time, or the duration of events, is determined by our brain's ability to track the passage of time through internal and external cues. Our perception of frequency, or the rate at which events occur, is determined by our brain's ability to analyze the number of occurrences of an event within a given period of time. All of these processes occur automatically and unconsciously, allowing us to quickly and accurately perceive our environment.

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This equation assumes that the eyeball is a simple harmonic oscillator and that the musculature acts as a linear spring. The frequency of the vibration (f) is equal to the natural frequency of the eyeball's oscillation and the mass (m) is the mass of the eyeball.

The frequency is the rate or number of occurrences of a particular event or phenomenon with respect to its occurrence within a given period of time. It is typically measured in cycles per second (hertz), or the number of times an event occurs in a given period of time. Frequency can also refer to the rate at which something is repeated, such as the number of times a sound is repeated in a given span of time. Frequency can also refer to the number of times a certain action is performed, such as the number of times a person visits a store in a given month.

The effective spring constant of the musculature attached to the eyeball is equal to the frequency squared (f^2) multiplied by the mass (m) divided by 4pi^2:

k = f^2 m / 4pi^2

k = (29 Hz)^2 (7.5 g) / (4(3.14)^2)

k = 0.395 N/m (2 sig figs)

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Equation \(\\k = 0.395 N/m (2 sig figs)\) assumes that the eyeball is a simple harmonic oscillator and that the musculature acts as a linear spring.

The frequency of the vibration (f) is equal to the natural frequency of the eyeball's oscillation and the mass (m) is the mass of the eyeball.

The frequency is the rate or number of occurrences of a particular event or phenomenon with respect to its occurrence within a given period of time. It is typically measured in cycles per second (hertz), or the number of times an event occurs in a given period of time. Frequency can also refer to the rate at which something is repeated, such as the number of times a sound is repeated in a given span of time. Frequency can also refer to the number of times a certain action is performed, such as the number of times a person visits a store in a given month.

The effective spring constant of the musculature attached to the eyeball is equal to the frequency squared (f^2) multiplied by the mass (m) divided by 4pi^2:

\(k = f^2 m / 4\pi^2\\k = (29 Hz)^2 (7.5 g) / (4(3.14)^2)\\k = 0.395 N/m (2 sig figs)\)

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The option that is not typically mandated for a CI (Continuous Integration) pipeline is d. Selenium.

CI pipelines are designed to automate the build, testing, and deployment processes, aiming to deliver software more efficiently and with higher quality. While options a. Terraform, b. Chef, and c. Maven are commonly used in CI pipelines, d. Selenium is not typically mandated for CI pipelines.

Selenium is a popular framework for automating web browser interactions and performing functional testing. While functional testing is an essential part of the software development lifecycle, it is not inherently tied to the CI pipeline. Selenium can be utilized separately as part of a testing strategy but is not a mandatory component of a CI pipeline.

The other options mentioned, Terraform, Chef, and Maven, are commonly used for infrastructure provisioning, configuration management, and build automation respectively, which are frequently integrated into CI pipelines.

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The statement “Increased levels of endorphins are released into the brain, boosting a person's mood” best explains how the regular form of exercise is beneficial to the brain.

Generally, when individuals exercise regularly, their bodies tend to release chemicals named endorphins. Some of the significant characteristics of endorphins are listed as follows:

Thus, we can conclude that regular exercise can boost a person’s mood by increasing the endorphin levels that are released into the brain. Hence, option A is the correct answer.

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The mass-luminosity relation for main sequence stars exists because the luminosity of a star depends on its mass. The more massive a star is, the higher its luminosity is, and vice versa.

There is a mass-luminosity relation for main sequence stars because the luminosity of a star depends on its mass. The more massive a star is, the higher its luminosity is. This is because a more massive star has a larger core, which allows for a higher rate of fusion to occur, resulting in more energy being released as radiation.

Most of the energy produced by fusion is consumed by the weight of the star, which is pressing down on the inner layers. The remaining energy is radiated into space as light and other forms of electromagnetic radiation. This characteristic radiation is only detectable on the enormous scale of the masses of stars.

The luminosity of a star is the amount of energy it radiates into space per unit time. It depends on the rate of fusion in the core, which is determined by the mass of the star. The more massive a star is, the more energy it can produce through fusion, and the higher its luminosity is.

Therefore, the mass-luminosity relation for main sequence stars exists because the luminosity of a star depends on its mass. The more massive a star is, the higher its luminosity is, and vice versa.

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Due to the fact that kinetic energy is proportional to the square of the speed, doubling the speed results in a four-fold increase in kinetic energy.

As a result, the object's kinetic energy doubles to become four times as much as its initial kinetic energy when its speed doubles.

Speed squared determines kinetic energy. The kinetic energy of an item increases by a factor of four with speed.

Because an object's motion is dependent on both its velocity and its mass, though velocity plays a larger role in motion.

Thus, the relationship between kinetic energy and mass and velocity is direct. Since kinetic energy is exactly proportional to both the square of velocity and mass, its value increases by an order of eight.

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