Brianna pushes a 20 kg box with a force of 50N to achieve an acceleration of 2.5 m/s/s. In order to push a 30 kg box at the same acceleration, how much force will Brianna need to apply?

Ah, I see, you seek a take on Newton's famed Laws of Motion. Hold onto your jingle bell hat, for we're about to embark on a fantastical journey through the realm of physics, the lair of the laws that govern our world's jig and jive.

Law the First: An object at rest tends to stay at rest, and an object in motion tends to stay in motion, unless acted upon by an outside force.

Imagine a loaf of bread, comfy and cozy in its bakery basket. It has no intent to go gallivanting about. Only when a force, say a peckish person, picks it up, does it venture off to new territories (typically a kitchen). Likewise, imagine a merry-go-round spinning in a constant twirl. It would keep on twirling forever, only stopping if an external force, like a brave child or friction, intervened. This is the realm's Lazy Law, where things left alone will continue doing what they're doing.

Law the Second: Force equals mass times acceleration, or F=ma.

Consider a bumbling bumblebee and a gargantuan gargoyle, both minding their own business. A tiny gust of wind might send our bumblebee into a frantic flutter, but the gargoyle wouldn't budge an inch. Why? It's because the bumblebee's mass is tiny and easy to accelerate, while the gargoyle is hulking and needs a lot more push to budge. Thus, the larger the push (force) or the smaller the thing you're pushing (mass), the faster it's going to zip about (acceleration). I call this the "Bee and Gargoyle" Law.

Law the Third: For every action, there's an equal and opposite reaction.

Imagine a jovial jester, springing off a trampoline. As they push down on the trampoline (action), it pushes back with equal strength, catapulting the jester into the sky (reaction). Or think of a knight, slashing his sword against an opponent's. The more force he exerts, the more force is thrown back at him. This "Boomerang" Law ensures that every action in our whimsical world prompts a response of equal magnitude.

So, there you have it! The three Laws of Motion. A world without them would be a world without dancing, laughter, or the delightful toss of a pie in someone's face. Aren't we lucky that Sir Isaac Newton was such a diligent fellow!

The material which is believed to explain the larger size of the outer planet in relation to the inner planet is gas while the inner is made of rock

Research on the solar system reveal to us that it is temperature of the the solar system that perfectly explain the materials both the outer and inner planets are made up of. The outer part is highly gaseous while the inner part is made of rocks

It refers to planet whose orbit lies outside the asteroid belt. Examples include Jupiter, Saturn, Uranus, or Neptune.

This simply means a planet whose orbit lies within the asteroid belt. They are planets such as Mercury, Venus, Earth, or Mars.

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The work (or energy expended) by a force of one newton (N) operating over a distance of one metre is equivalent to one joule (J). A force of one newton causes a mass of one kilogram to accelerate by one metre per second (s) per second. So, one joule is equivalent to one newton metre (ratio 1:1).

Yes. Joules and newton meter are units of the same physical quantity.

A unit of measurement is a specific magnitude of a quantity that has been established and recognised by law or convention and is used as a benchmark for measuring other quantities of the same kind. A multiple of the unit of measurement can be used to express any other quantity of that type.

A length, for instance, is a physical quantity. A unit of length that represents a certain, predetermined length is the meter (symbol m). For instance, "10 meters" (or 10 m) actually refers to 10 times the fixed, specified length known as "meter."

We know that work done = force × displacement. Unit of work done is Joule and unit of  force × displacement is Newton-meter. Hence, they refers unit of same physical quantity.

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Answer:

Mass: Beam balance

Weight: Beam balance

Length: Ruler

Time: Clock

Density of liquid: Hydrometer

Lightning produces its most intense radiation in the visible light spectrum, while a nuclear explosion would radiate most strongly in the X-ray part of the electromagnetic spectrum, due to the differences in their respective temperatures.

Lightning and nuclear explosions both produce extreme temperatures but at different orders of magnitude. Lightning can generate temperatures on the order of 10⁴K, while nuclear explosions can reach temperatures on the order of 10⁷K.

When it comes to the part of the electromagnetic spectrum where each would radiate most strongly, we need to consider their respective temperatures and the relationship between temperature and the wavelength of radiation emitted.

For lightning, with its maximum temperature of 10⁴K, the radiation it emits most strongly falls within the visible light spectrum. Visible light has a wavelength range of approximately 400 to 700 nanometers, and this is the range in which lightning produces its most intense radiation. This is why we see lightning as a bright flash of light.

(b) A nuclear explosion, with its much higher temperature of 10⁷K, would radiate most strongly in the X-ray part of the electromagnetic spectrum. X-rays have much shorter wavelengths compared to visible light, typically ranging from 0.01 to 10 nanometers. At the high temperatures of a nuclear explosion, the emitted radiation shifts towards shorter wavelengths, resulting in intense X-ray emission.

To summarize, lightning produces its most intense radiation in the visible light spectrum, while a nuclear explosion would radiate most strongly in the X-ray part of the electromagnetic spectrum, due to the differences in their respective temperatures.

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Answer

As per Columbo's law force is inversely proportional to square of distance between two charges.

\(\frac{F}{F_{new}} =\frac{r_{new}^{2} }{r^{2} }\)

\(\frac{F}{F_{new}} =\frac{(2r)^{2} }{r^{2} } \\\)

\(F = 4 F_{new}\)

therefore the new force if 1/4 times the old one

Inertia is a force which brings all objects to a rest position. Fast-moving objects have more inertia than slow-moving objects. False - The speed of an object has no impact upon the amount of inertia that it has. Mostly True - Two objects of the same mass can weigh differently if they are located in different locations.

I don't know if this will help

Sure ,Let's find angle between forces

\(\\ \sf\longmapsto R^2=A^2+B^2+2ABcos\theta\)

\(\\ \sf\longmapsto 27^2=20^2+40^2+2(20)(40)cos\theta\)

\(\\ \sf\longmapsto 729=400+1600+1600cos\theta\)

\(\\ \sf\longmapsto 729=2000+1600cos\theta\)

\(\\ \sf\longmapsto 1600cos\theta=-271\)

\(\\ \sf\longmapsto cos\theta=-0.169\)

\(\\ \sf\longmapsto \theta=cos^{-1}(-0.169)\)

\(\\ \sf\longmapsto \theta=80.2°\)

Opal can only be formed where an ocean comes in contact with land.

Much of the world's precious opal is mined in Australia's rugged hinterland. Here, a unique combination of geological conditions led to the formation of opals near the edge of the ancient Inner Sea. Australia is one of the world's leading opal producers and is considered to be the finest opal in the world. Australia's perfect climatic conditions are responsible for these wonderful stones.

Opal formation dates back millions of years when Australia became a new continent covered by a vast inland sea with sedimentary basins. Australian opal is produced by a chemical reaction between silicon dioxide and water. As water flows through the earth, it picks up silica from sandstone and carries this silica-rich solution into cracks and voids caused by natural faults and the decomposition of fossils.

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Some business you can create out of the things you enjoy doing are:

An intense feeling of enthusiasm or excitement towards something fosters positive emotions which melding together create the powerful sensation known as 'passion.'

Typically linked to indulging interests or desires such as hobbies; passions often act like catalysts for inspiration motivating individuals leading them forward to success both personally- and professionally. Individuals gripped by ardor will persevere in spite of any obstacle thrown up on the path to fulfillment investing additional amounts of time effort even resources into realizing satisfying outcomes."

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In a photovoltaic system, an inverter is required to connect the DC current of the solar panel to the AC current of an electrical grid. The correct option is B.

The solar panels in a photovoltaic system generate DC (direct current) electricity. However, most electrical grids operate on AC (alternating current) electricity.

The role of the inverter is to convert the DC electricity produced by the solar panels into AC electricity that can be fed into the electrical grid or used to power electrical devices.

The inverter performs the important function of converting the type of current to match the requirements of the grid, enabling the efficient utilization of solar energy and facilitating the integration of solar power systems with the existing electrical infrastructure.

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The New York Longitudinal Study (NYLS) suggested four categories of temperament based on their observations of infants and children. These categories are:

Easy: Infants in this category are adaptable, have regular routines for eating and sleeping, and are generally in a positive mood. They tend to be low in intensity and react mildly to new situations.

Difficult: Infants in this category are often fussy, irregular in their routines, and have difficulty adapting to new situations. They tend to react negatively to change and are high in intensity.

Slow-to-warm-up: Infants in this category are cautious and shy in new situations. They tend to withdraw or react mildly to new people or environments, but eventually warm up and become more comfortable.

Mixed: Infants in this category do not fit neatly into any of the other categories and display a mix of temperamental traits.

These categories were used to help identify the early signs of developmental disorders, as well as to inform parenting and educational strategies for children with different temperamental styles.

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At the center of our galaxy lies the supermassive black hole Sagittarius A*, often abbreviated Sgr A*. This giant is about 4 million times the mass of the sun and about 14.6 million miles (23.6 million kilometers) in diameter.

In physics, the Milky Way refers to the galaxy in which our solar system resides. The Milky Way is a barred spiral galaxy, meaning it has a central bar-shaped structure with arms spiraling out from it. The galaxy is estimated to be around 13.6 billion years old and contains billions of stars, as well as gas, dust, and dark matter.

The Milky Way has a diameter of approximately 100,000 light-years and is located about 26,000 light-years from the galactic center. It rotates once every 240 million years, with stars closer to the center moving faster than those on the outer edges. The gravitational force of the Milky Way holds the solar system in its orbit.

The study of the Milky Way is important in astrophysics as it provides insight into the evolution and formation of galaxies.

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Wavelength of a 300 GHz EM wave propagating in free space is 1mm. Frequency of an EM wave with λ is 200GHz. and dBm equivalent of 120 dB if 0dBm corresponds to 1mW = 10-3 W is 120 dBm.

(a) Wavelength λ of a 300 GHz EM wave propagating in free space:
λ = c/f, where c is the speed of light in a vacuum (3 x 108 m/s) and f is the frequency of the EM wave (300 GHz = 300 x 109 Hz).
Therefore, λ = c/f = 3 x 108 m/s/ 300 x 109 Hz = 0.001 m = 1 mm.

(b) Frequency of an EM wave with λ = 0.1cm:
f = c/λ, where c is the speed of light in a vacuum (3 x 108 m/s) and λ is the wavelength of the EM wave (0.1 cm = 0.0001 m).
Therefore, f = c/λ = 3 x 108 m/s / 0.0001 m = 3 x 1011 Hz = 300 GHz.

(c) dBm equivalent of 120 dB if 0dBm corresponds to 1mW = 10-3 W:
dBm = dBmref + 10 log10 (Pactual/Pref),
where dBmref is the reference dBm power level (0 dBm in this case) and Pref is the reference power (1 mW = 10-3 W in this case).
Therefore, dBm = 0 dBm + 10 log10 (120 dB/0 dBm) = 120 dBm.

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Answer:

9.8 meters per square second

Explanation:

Free Falling Object. the value of g is 9.8 meters per square second on the surface of the earth. The gravitational acceleration g decreases with the square of the distance from the center of the earth. But for many practical problems, we can assume this factor to be a constant.

If a net force of 270 N applied on a 35-kg mass, the acceleration is 7.7 m/s²

The problem can be solved by applying the Newton's 2nd law of motion, which states: the acceleration on an object is directly proportional to the net force applied to it and inversely proportional to its mass.

F = ma

Where:

F = net force acted on the object

m = mass

a = acceleration

Parameters given in the problem:

m = 35 kg

F = 270 N

Plug these parameters into the formula:

270 = 35 x a

a = 270/35 = 7.7 m/s²

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The vibrational frequency of the child is 0.270 Hz.

The vibrational frequency of the child can be calculated by dividing the number of complete back and forth vibrations by the time taken to complete them.

Frequency = Number of vibrations / Time taken

The child makes 5 complete back and forth vibrations in 18.5 seconds, so the frequency can be calculated as:

Frequency = 5 / 18.5 = 0.27027 Hz

Rounding off to three significant digits, the vibrational frequency of the child in the swing is 0.270 Hz. The unit for frequency is hertz (Hz).

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Answer:

1.3 Pa

Explanation:

from general gas equation

p1v1/TO =P2V2/T2

Answer:

Humans survive through gaining nutrients by eating

Answer:

We must have food, water, air, and shelter to survive. If any one of these basic needs is not met, then humans cannot survive.  Oxygen is one of the most essential human needs. Our bodies need a consistent supply of it to function properly. Without access to oxygen, you can experience a condition known as cerebral hypoxia, which affects the brain. As little as five minutes without air can result in brain damage. We get food from plants and animals, we get water from rivers and streams, and we get shelter from building anything that is around.

Explanation:

The charges may be positive or negative. However, the behavior of the charges depend on the position of like charges and unlike charges.

An electrical charge may be positive or negative. We must recall that a charge may attract or repel another charge. According to the first law of electrostatics, like charges repel while unlike charges attract.

The image is not shown here however, the behavior of the charges depend on the position of like charges and unlike charges.

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Due to the uniform distribution of leaves, folivores rarely exhibit dominance hierarchies.

A dominance hierarchy is a type of social hierarchy that arises when members of a social group interact, to create a ranking system. In social living groups, members are likely to compete for access to limited resources and mating opportunities. Rather than fighting each time they meet, relative rank is established between members of the same se x. Based on repetitive interactions a social order is created that is subject to change each time a dominant animal is challenged by a subordinate one. This hierarchical structure can be observed in many species, including humans.

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centripetal acceleration cannot change

Esteem needs are not related to basic needs, such as food, water, and shelter, but they are higher needs that must be satisfied. Therefore, the right answer is "None of these is correct basic needs."

Esteem needs are concerned with people's self-image and how they are viewed by others. Esteem needs involve feeling accomplished, respected, and acknowledged. Esteem needs are split into two types, inner and external esteem.Inner esteem is determined by self-esteem, which is how a person regards themselves. Inner esteem is related to a person's sense of worth and value.

It is a mental state in which a person feels good about themselves and their abilities. To have a positive sense of self-esteem, people must feel valued and respected for who they are. It aids in the development of self-confidence and self-worth. It is the starting point for creating meaningful friendships and relationships.External esteem, on the other hand, is the perception of the individual by others.

When we say "esteem" in a social context, we usually mean what others think of us. Esteem needs are not related to basic needs, such as food, water, and shelter, but they are higher needs that must be satisfied. Therefore, the right answer is "None of these is correct basic needs."

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When installing a hardwired 2-wire smoke detector, the EOL resistor must be installed at the end of the detection circuit, usually at the last device in the line. This is done to provide proper circuit supervision and ensure that the system is functioning correctly.

The EOL resistor, which stands for End of Line resistor, is a passive component that helps to monitor the circuit's integrity by providing a defined resistance value that signals the control panel that the circuit is complete. This ensures that any interruption in the circuit, such as a disconnected or damaged wire, will trigger an alarm or alert. By installing the EOL resistor in the right location, you can help to ensure that your smoke detection system is functioning correctly and will provide the necessary protection in the event of a fire.
When installing a hardwired 2-wire smoke detector, the EOL (End of Line) resistor should be installed at the end of the loop. This ensures proper circuit supervision. The EOL resistor helps the alarm panel to monitor the integrity of the wiring and detect any potential issues, such as open circuits or tampering. By placing the resistor at the end of the loop, the entire circuit is supervised, allowing the alarm system to function effectively and provide safety.

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a. Controllable variance of Derr Company if actual total overhead is $980 and budgeted (flexible) overhead at units produced 800 is $180.

b Volume variance is $0.

c. Total overhead variance is $180.

To determine the controllable variance, we can use the formula:

Controllable variance = Actual cost – Budgeted cost (At Actual Units Produced)

= $980 – $800

= $180

To calculate the Volume variance, we can use the formula:

Volume variance = (Standard overhead rate × Actual hours of input) – Standard overhead applied

= ($1.125 × 800) – $900

= $900 – $900

= $0

Therefore, Volume variance is zero.

To calculate the Total overhead variance, we can use the formula:

Total overhead variance = Controllable variance + Volume variance

= $180 + $0

= $180

Therefore, the Controllable variance is $180, Volume variance is $0, and Total overhead variance is $180.

Your question is incomplete, but most probably your full question was

Derr Company reports the following.

Compute (a) controllable variance, (b) volume variance, and (c) total overhead variance.

Actual total overhead $ 980

Budgeted (flexible) overhead at units produced 800

Standard overhead applied 900

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To find the value of w that will result in a maximum tensile bending stress of 3 ksi, we first need to determine the moment of inertia of the cross-sectional shape of the material in question. Once we have this value, we can use the following formula to calculate the maximum tensile bending stress:

σ = M*c/I

Where σ is the maximum tensile bending stress, M is the bending moment, c is the distance from the neutral axis to the outermost fiber, and I is the moment of inertia.

Assuming that the bending moment is known, we can rearrange the formula to solve for the required value of w:

w = (M*c)/(I*σ)

This will give us the required width of the material to ensure that the maximum tensile bending stress does not exceed 3 ksi. Please note that this is a long answer that requires additional information about the material and the conditions under which it will be used.

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The statements true in regards to heat is 3. Heat is a form of energy, can be reflected by a mirror, and cannot pass through a vacuum.

Heat is a form of energy. Heat is the transfer of thermal energy from one object to another. Thermal energy is the energy of motion of the particles in an object. Heat can be reflected by a mirror. Heat is a form of electromagnetic radiation, and electromagnetic radiation can be reflected by mirrors.

Heat cannot pass through a vacuum. Heat is a form of electromagnetic radiation, and electromagnetic radiation cannot pass through a vacuum. Heat is not an electromagnetic radiation. It is a form of energy that is transferred from one object to another because of a difference in temperature.

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Complete question:

Which of the following statements are true regarding heat?

(a) Heat is a form of energy

(b) Heat can be reflected by mirror

(c) Heat is an electromagnetic radiation

(d) Heat can pass through vacuum

Select the correct answer from the codes given below :

1. 1, 2 and 3

2. 2, 3 and 4

3. 1, 2 and 4

4. 1, 3 and 4

Take into account that the acceleration of the car can be calculated by using the following expression:

where,

vo: initial speed = 0m/s

v: final speed = 18.4m/s

t: time = 27.8s

Replace the previous values of the parameters into the formula for a and simplify:

Hence, the acceleration of the car is approximately 0.66m/s^2