What is the scientific definition of "work"?

Answer:

False.

Explanation:

An aurora is a natural electric phenomenon that creates bright and colorful light displays in the sky. These dramatic and colorful lights are created when electrically charged particles from solar winds enter the Earth's atmosphere and interact with gases in the atmosphere.

Question :-

Answer :-

Explanation :-

As per the provided information in the given question, we have been given that the Mass of the trailer is 360 kg . Force is given as 7200 Newton . And, we have beena asked to calculate the Acceleration of the Truck .

For calculating the Acceleration , we will use the Formula :-

\( \bigstar \: \: \: \boxed {\sf{ \: Acceleration \: = \: \dfrac {Force}{Mass} \: }} \)

Therefore , by Substituting the given values in the above Formula :-

\( \dag \: \: \: \sf {Acceleration \: = \: \dfrac {Force}{Mass}} \)

\( \longmapsto \: \: \: \sf {Acceleration \: = \: \dfrac {7200}{360}} \)

\( \longmapsto \: \: \: \textbf {\textsf {Acceleration \: = \: 20 }} \)

Hence :-

\( \underline {\rule {180pt} {4pt} } \)

Answer:

A Truck is Pulling a Trailer down a Highway . The Total Mass of the Trailer is 360kg and the Force at which the Truck is pulling is 7200 Newton . What is the Acceleration of the Truck ?

Answer :-

Acceleration of the Truck is 20 m/s² .

Explanation :-

As per the provided information in the given question, we have been given that the Mass of the trailer is 360 kg . Force is given as 7200 Newton . And, we have beena asked to calculate the Acceleration of the Truck .

For calculating the Acceleration , we will use the Formula :-

\bigstar \: \: \: \boxed {\sf{ \: Acceleration \: = \: \dfrac {Force}{Mass} \: }}★

Acceleration=

Mass

Force

Therefore , by Substituting the given values in the above Formula :-

\dag \: \: \: \sf {Acceleration \: = \: \dfrac {Force}{Mass}}†Acceleration=

Mass

Force

\longmapsto \: \: \: \sf {Acceleration \: = \: \dfrac {7200}{360}}⟼Acceleration=

360

7200

\longmapsto \: \: \: \textbf {\textsf {Acceleration \: = \: 20 }}⟼Acceleration = 20

Hence :-

Acceleration = 20 m/s² .

Answer:

79%

Explanation:

Energy expelled / Energy absorbed = 415/525 = 0.79 = 79%

In one cycle, an engine burning a mixture of air and methanol absorbs 525 J and expels 415 J , then the efficiency of engine would be 20.95 %

The efficiency of an Indian can be defined as the ratio of the total useful work done by the engine to the total heat absorbed by the engine
It can be represented in the form of percentage or in terms of fraction as well.

In general the efficiency of an engine represented by the greek symbol η.

The mathematical expression for the efficiency of an Indian can be presented as follows

Efficiency = useful work done /total heat absorbed

Total useful work = total heat absorbed - total heat rejected

For the given problem,An engine burning a mixture of air and methanol absorbs 525 Jules and expel 415 Jules

The total useful work done by the engine = 525 J - 415 J
                                                                       =110 J

η = 110 / 525

  =0.2095

For getting the percentage we have to multiply the fraction with 100.

Thus ,efficiency of the engine comes out to be 20.95%.

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The light has a frequency of 1.75 x 10¹³ hz. The speed of light is 3.00 x 10⁸ m/s. The wavelength of light is (λ) = 1.714 x 10⁴ nm

When a wave that propagates in a medium it has different lengths. That length of the wave is called the wavelength. It can be measured in m, cm, nm etc.

To calculate the wavelength we are using the formula,

λ=c/f

Here we are given,

c= The speed of light in zero space. = 3.00 x 10⁸ m/s.

f = The frequency of the light. = 1.75 x 10¹³ hz.

We have to calculate the wavelength of the light = λ m

Now we put the values in above equation we get,

λ=c/f

Or, λ=3.00 x 10⁸ / 1.75 x 10¹³

Or,  λ= 1.714 x 10⁻⁵ m

So we can easily say that,

The wavelength of light is (λ) =1.714 x 10⁻⁵ m = 1.714 x 10⁴ nm

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Answer:

hope it helps make brainlliest ty

Answer:

Explanation for yall who dont get:

Basically, the energy that is changing during a phase change is potential energy. Why? Cuz, during a phase change, the heat added (Potential Energy INCREASES) or released (Potential Energy DECREASES) allow the molecules to move apart or be together.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Leme know if im wrong.  

GL.

Answer:

t = S / V = 3.8E8 / 3E8 = 1.3 sec

It takes over 1 second for a radio signal to travel between the earth and the moon.

Answer:

The effect of gravitation is more in liquid than on solid because inter molecular force of attraction is less in liquid and it is weak than that of solid. ... Whereas in solid the molecule are densely packed together an the inter molecular forces are constantly acting upon one another, this results in higher forces.

The estimated temperature of the radiant wall heater when operating is approximately 257 Kelvin.

To estimate the temperature of the radiant wall heater, we can use the Stefan-Boltzmann law, which relates the power radiated by an object to its temperature.

The formula for power radiated is given by:

P = σ * A * T^4

where P is the power radiated, σ is the Stefan constant (6 x 10^-8 Wm^-2K^-4), A is the surface area of the heater, and T is the temperature in Kelvin.

First, we need to calculate the surface area of the silica cylinder. The formula for the surface area of a cylinder is:

A = 2πrh + 2πr^2

where r is the radius and h is the height (length) of the cylinder.

Given:

Radius, r = 6 mm = 6 x 10^-3 m

Length, h = 0.6 m

Plugging in these values, we can calculate the surface area:

A = 2π(6 x 10^-3 m)(0.6 m) + 2π(6 x 10^-3 m)^2

 = 0.072π m^2

Now, we can rearrange the Stefan-Boltzmann law to solve for temperature T:

T^4 = P / (σ * A)

Given:

Power, P = 1.5 kW = 1500 W

Stefan constant, σ = 6 x 10^-8 Wm^-2K^-4

Surface area, A = 0.072π m^2

Plugging in these values, we get:

T^4 = (1500 W) / (6 x 10^-8 Wm^-2K^-4 * 0.072π m^2)

T^4 ≈ 3.1 x 10^9 K^4

Taking the fourth root of both sides, we find:

T ≈ 257 K

Therefore, the estimated temperature of the radiant wall heater when operating is approximately 257 Kelvin.

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Answer:

180 m/s

Explanation:

acceleration = 60 m/s2

time = 3 secs

u(initial velocity) = 0 m/s

v(final velocity) = ?

equation used is = v = u + at

0 + 60*3

v = 180 m/s

A dragster's top acceleration is 60 meters/second². If it accelerates for 3 seconds from the starting line, then the total distance covered by it would be

The rate of change of the velocity with respect to time is known as the acceleration of the object.

As given in the problem a dragster's top acceleration is 60 meters/second². If it accelerates for 3 seconds from the starting line, then we have to find out the total distance traveled by it,

top acceleration of the dragster = 60 meters/second²

time period to accelerate = 3 seconds

By using the second equation of motion,

s = ut + 1/2at²

s = 0 + 0.5×60×3²

s = 270 meters

Thus, the total distance covered by the dragster would be  270 meters

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Answer:

Newtons third law explains ...........

Explanation:

Newton's third law explains why her elbow hurts because Newton's law says that " for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. ", and her elbow's force while moving was equally matched by the table so if her elbow released 30N as her force then the table also released 30 N.

According to Newton's third law, when Lean bumps her elbow on the table it exerts a force on the table, and in reaction, the table exerts an equal magnitude of the force on her elbow and her elbow will hurt.

According to Newton's 3rd law of motion, if an object exerts a force on another, then it also experiences a force, and such forces are called action and reaction pairs.

When the first object exerts a force on the 2nd object, the first object will also experience a force equal in magnitude but in the opposite direction of the applied force.

For example, when a person is swimming, he pushes the pool water backward direction. In return, the water pushes him in a forward direction, which makes him proceed.

Therefore, when Lean bumps her elbow on the table, the table exerts an equal force on her elbow therefore, her elbow hurts.

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Gases such as carbon dioxide (CO2) play a crucial role in climate and weather patterns.Carbon dioxide, along with other greenhouse gases like methane and water vapor, helps trap heat in the Earth's atmosphere, leading to the greenhouse effect.

This effect is essential for maintaining a habitable temperature on Earth. Without greenhouse gases, the planet would be too cold to support life.

However, the increased concentration of greenhouse gases, primarily due to human activities like burning fossil fuels, has led to an enhanced greenhouse effect, resulting in global warming. The rise in CO2 levels has been directly linked to the increase in average global temperatures and climate change.

Moreover, changes in CO2 levels can affect weather patterns and climate systems. The absorption and release of heat by the atmosphere, influenced by greenhouse gases, contribute to the formation of weather systems such as storms, precipitation patterns, and wind patterns.

Therefore, gases like carbon dioxide are indeed important factors in climate and weather, and their concentrations and effects are subjects of significant scientific study and concern.

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Answer:-400 n

Explanation:

Charles's law means that the volume of a gas is directly proportional to its absolute temperature

Boyle's Law tells us that the volume of a gas increases as the pressure decreases. Charles's law tells us that the volume of a gas increases with increasing temperature

This is stated by Karl's law, also known as the law of volumes

For a dry gas sample, its volume and Kelvin temperature are directly proportional if the pressure is kept constant

 \(\begin{equation*} PV=nRT \end{equation*}\)           P : is a Pressure(Pa)

  \(\begin{equation*} V=\frac{nRT}{P} \end{equation*}\)              V : is volume (\(m^{3}\))

                              T : absolute temperature (K)

                              R : gas constant \(\begin{equation*} 8.314K^{-1}.mol^{-1} \end{equation*}\)

                               n : amount of substance of the gas (mole)

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Answer:

B. creating business products

Explanation:

All of the following are job duties an industrial/organizational psychologist may perform except B. creating business products

The creation of business products is the one task that an industrial/organizational psychologist cannot accomplish, hence option B is the appropriate response.

Psychology is the name given to the scientific study of the mind and behavior. Psychiatrists are engaged in an ongoing study to better understand the mind, brain, and personality.

the psychological schools of thought known as biological, psychodynamic, behavioral, cognitive, and humanistic.

The business and productivity facets of psychology are covered in industrial/organizational psychology.

Within a company organization, an industrial/organizational psychologist carries out a variety of tasks including boosting employee productivity, enhancing business operations, and offering management advice.

An industrial/organizational psychologist does not create the company product.

Thus, with the exception of developing business products, all of the following are tasks that an industrial/organizational psychologist may carry out. Option B is the best response.

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The momentum of the system is always constant. Therefore, the example that best fits the criteria is "A freely falling metal ball, with the ball and Earth as the system." So, C is the correct option.

When considering the examples given, we can eliminate options (a) and (d) as they suggest that the momentum of the system is always constant.

The momentum of a system is the product of the mass and velocity of an object. When the metal ball is falling freely, the momentum of the ball and the Earth system changes continuously as the velocity of the ball changes due to the force of gravity. Therefore, the momentum of the system is not constant in this case.

So, the correct option is C.

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The correct option is a. Within the range of 0 degree C to 4 degree C, water contracts when the temperature decreases, whereas most substances expand.

This property of water has important implications for the behavior of lakes and oceans in cold climates and temperature, as the contraction of water as it cools can cause it to sink to the bottom, which can in turn affect the circulation and mixing of water in these bodies.

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Agatha requires (c) 10 hours of sleep each night.

Children in middle school ideally require average 9-12 hours of sleep each night. If the number of hours of sleep each night is compromised, it will show effect on the concentration and health of the child.

Because sleep is crucial to your physical health, it is crucial that you receive enough of it every night. For instance, your heart and blood arteries are able to recover and repair themselves as you sleep. An increased risk of heart disease, renal disease, high blood pressure, diabetes, and stroke has been related to chronic sleep deprivation. For the brain and body to operate properly the following day, doctors and specialists advise children to receive at least 9 to 12 hours of sleep each night.

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The speed of the wave is 0.42 m/s.

Speed is the rate of change of distance.

To calculate the speed of the wave, we use the formula below,

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

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Complete question: The crests of waves passing into a harbor are 2.1 m

apart and have an amplitude of 60 cm. 12 waves

pass an observer every minute. What is the speed of the wave.

Answer:2 seconds

Explanation:

g=10m/s2

h=20m

t=h/g

t=20/10

t=2s

The tertiary consumers obtain 36 joules of energy if the primary customers use 3600 joules.

Energy, radiant energy, energy source, nuclear energy, electric power, motion energy, energy, elastic energy, and gravitational energy are among the several types of energy.

Modern medical technology, transportation, communications, computers, and numerous other items are all driven by energy. Particularly urgent is the need for affordable, reliable energy in rising economies. It might even save a person's life.

Consequently, if the main consumers use 3600 joule of energy,

the tertiary customers get

                      =3600×10%×10% joules

                      = 36 joules.

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Answer:

15 μF

Explanation:

If two capacitors are in parallel, the equivalent capacitance is equal to the sum of the capacitances, so for the first two capacitors, we get:

C = 10 μF + 20 μF

C = 30 μF

Then, this capacitor C is in series with another capacitor of 30μF. For capacitor in series, we can find the equivalent as follows

Therefore, the answer is 15μF

The first step is to convert the parallax angle of the star to distance. We can use the formula: parallax angle in arc seconds = (distance to star in parsecs)^-1 We can rearrange this equation to isolate distance: d = (parallax angle)^-1 Therefore, the distance to the star in parsecs is:

d = (0.0190 arcseconds)^-1 = 52.6 parsecs Next, we need to find the actual distance in meters. One parsec is equivalent to 3.09 × 10^16 meters. Therefore, the distance to the star in meters is: distance = (52.6 parsecs)(3.09 × 10^16 meters/parsec) = 1.63 × 10^18 meters Now, we can use the formula for time: d = vt Solving for time: t = d/v We are told to travel at half the speed of light, which is v = 0.5c, where c is the speed of light.

Therefore, the time to travel to the star is: t = (1.63 × 10^18 meters)/(0.5c) Using the speed of light, c = 3.00 × 10^8 m/s, we get: t = (1.63 × 10^18 meters)/(0.5 × 3.00 × 10^8 m/s)t ≈ 10.9 years Therefore, it would take about 10.9 years to travel to the star if traveling at half the speed of light.

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Answer:

v = 17.14 m/s

Explanation:

Given that,

Mass of eagle is 3.75 kg

We need to find the speed of Eagle after it has fallen freely from the rest through a distance of 15m. We can use third equation of motion :

\(v^2-u^2=2as\)

u = 0 (at rest) a= g

\(v^2=2gs\\\\v=\sqrt{2gs} \\\\v=\sqrt{2\times 9.8\times 15} \\\\v=17.14\ m/s\)

so, the speed of the eagle is 17.14 m/s.

The hst uses solar panels to generate electrical energy in exactly the same manner as a solar array converts sunlight into power.

Different components make up solar photovoltaic (PV) energy systems. Every component has a distinct purpose. The kind of component in every system is determined by the system's nature and function. A simple PV-direct system, such example, is made up of a solar array as well as module (two or more modules connected together) as well as the load (energy-consuming equipment) that it powers.

Submersible water pumps as well as ventilation fans represent the most prevalent loads. Direct current is generated by a solar energy system (DC). This involves electricity that only flows in one way. A simple PV system's loads are also direct current (DC).

A PV-direct system will contain more components than a stand-alone system including energy storage (a battery). This fact sheet would introduce the various solar PV system components as well as describe their applications in various types of solar PV systems.

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With the below stated fact  I think that  the pros of using synthetic materials outweighs the cons.

Before we answer the question

If the pros of using synthetic materials outweigh the cons or otherwise, let us first establish the what a synthetic material is and its pros and cons

Synthetic material

Synthetic material is a material in which a substances are changed chemically to produce a material with different characteristics.

Types of Synthetic material

Pros of Synthetic materials

Cons of Synthetic materials

In conclusion

Although Synthetic materials has so very pressing disadvantages to human kind it is unrefusable the importance of Synthetic materials to the day to day live of all humans

Therefore, I think that  the pros of using synthetic materials outweighs the cons

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Answer:

F = 300 N

Explanation:

This is an example of Newton's second Law

F = m * a

F = ?

m = 15 kg

a = 20 m^2

F = 20 * 15

F = 300 Newtons.