What type of symmetry is the basis for Electromagnetic, Strong, and Weak forces in Quantum Field Theory

Answer:

 In places of hot climate, it is advised that the outer walls of house be painted white because white color does not absorb any heat radiation from the sun which keep inside cool even if there is hot climate outside the house.

The student needs a thermometer to measure the change in temperature of the copper block. Therefore, the answer is thermomter and watch.

Option D is correct.

A thermometer is described as a device that measures temperature or a temperature gradient.

An instrument that measures temperature is a thermometer.

It is able to gauge the temperature of solids like food, liquids like water, and gases like air. Celsius, Fahrenheit, and kelvin are the three most popular temperature measuring units.

The metric system includes the Celsius scale.

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Answer:

more

Explanation:

the higher the density the more closely/tighter the particles in the object will be

Answer:

D.gravity

Explanation:

Answer:Acidic: meat, poultry, fish, dairy, eggs, grains, alcohol. Neutral: natural fats, starches, and sugars. Alkaline: fruits, nuts, legumes, and vegetables.

Explanation:

Answer:

unbalanced and contact

Explanation:

The two terms that bests describes the net force acting on the sled is an unbalanced and contact force.

Force is a pull or push on a body. We have two main types of forces. Contact forces acts on a body and they must be in touch with it. An example is frictional force.

Non - contact forces acts based on force field and they are not in contact with the body. An example is gravitational force.

Therefore, the force on the wagon is an unbalanced and contact force.

Answer:

Explanation:

Using the ideal gas equation as shown

PV = nRT where;

P is the pressure of the gas in ATM

V is the volume of the gas

n is the number of moles

R is the ideal gas constant

T is the temperature in Kelvin

From the formula, \(T = \frac{PV}{nR}\)

Given the following parameters V = 1litre, n = 0.5moles. pressure = 2ATM

R = 0.08206 atm L/molK

On substituting to get the temperature we have:

\(T = \frac{2*1}{0.08206*0.5} \\T = \frac{2}{0.04103}\\T = 48.75Kelvin\)

The measured initial kinetic energy (J) of the bullet is 158.70 J.

So, the correct answer is A.

We know that the initial kinetic energy (KE) of the bullet is given by:

KE = (1/2) mv²

Where,m = mass of the bullet

v = velocity of the bullet

So, the initial kinetic energy of the bullet can be calculated as:

KE = (1/2) mv²

KE = (1/2) (m) (v)²

To determine the initial kinetic energy of the bullet in Joules, we can use the formula KE = 1/2mv², where m is the mass of the bullet and v is its velocity.

From question 13, we know that the mass of the bullet is 0.023 g, which is equal to 0.023/1000 kg. We also know that its velocity is 330 m/s.

Plugging these values into the formula, we get KE = 1/2 x 0.023/1000 x (330)²= 158.7 J.

Therefore, the measured initial kinetic energy of the bullet is option A, 158.70 J.

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The load in pounds per foot that it exerts on the floor is 1.15p/ft when a building wall consists of 12-inch clay brick and 12-inch fiberboard on one side.

Given the length of clay brick (l1) = 12inches.

The length of fireboard (l2) = 12 inch

Length of wall (L) = 13ft

From the given information for 12-in clay brick, the obtained minimum design dead load = 115psf

For Fiberboard 1/2 inch ceilings, the minimum design dead load is 0.75psf

To start with the load that is being exerted on the floor as a result of the clay brick wall (L1 ), we have: L1 = load x h

L1 = 115x13 = 1495lb/ft

To calculate the load exerted on the floor as a result of the 12inch fireboard, we have: L2 = load x h

L2 = 0.75 x 13 = 9.75lb/ft

The total load exerted on the floor = L1 +L2

The total load exerted on the floor = 1495 + 9.750 = 1504.5lb/ft = 1.150p/ft

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The energy of the high energy neutron is 940.51 MeV.

Speed is nothing but the distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity with the SI unit meter/second.

We know that mass of the neutron m₀ = 939.6 MeV/c²

A high energy neutron is travelling at a speed of 18 million m/s.

Given that, v = 1.8 * 10⁷ m/s

The energy of neutron is calculated with the formula, m₀* c²/√(1 - v²/c²)

⇒ 939.6 * (3* 10⁸)²/√[1 - (1.8 * 10⁷)²/(3* 10⁸)²]

⇒ 940.51 MeV

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The statement that is NOT an argument for Cygnus X-1's being a true black hole is d. X-rays from Cygnus X-1 vary on time scales as short as a millisecond.

What is a black hole?

A black hole is a celestial body that results from the death of a massive star. The black hole's gravitational pull is so strong that it prevents anything from escaping it, including light. As a result, black holes are invisible and can only be detected by the effects of their gravitational pull on other objects.

What is Cygnus X-1?

Cygnus X-1 is a binary star system located approximately 6,000 light-years away in the constellation Cygnus. The system contains a massive blue super giant star and a compact object that is believed to be a black hole, which orbits each other.

Cygnus X-1 was the first black hole discovered.The following are some arguments for Cygnus X-1's being a true black hole:

a. Cygnus X-1's mass is estimated to be about 10 solar masses

.b. Spectroscopic data suggests hot gas is flowing from the companion B star onto Cygnus X.1.

c. X-ray observations around the object support a temperature of several million . Among the options given in the question, d. X-rays from Cygnus X-1 vary on time scales as short as a millisecond is NOT an argument for Cygnus X-1's being a true black hole.

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One way by which global warming aggravates the effect of radiation is through greenhouse effect

The combined effects of global warming and radiation is explained as follows.

Global warming is the gradual increase in the temperature of the Earth's surface (land), ocean and the atmosphere through the heat from the radiation of the sun.

One way by which global warming aggravates the effect of radiation is through greenhouse effect.

This greenhouse effect aggravates the effect of radiation.

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Answer:

Because they don't have a telescope to magnify so close

Explanation:

Hope it works for you :)

Answer:

scientists can't see inside a atom because the atoms cant be seen by anything                      hope it help :)

Explanation:

The standard equations of the parabolas are listed below:

In this question we have four case of parabolas with vertical axes of reference, whose standard formula is:

\(y - k = \frac{1}{4\cdot p}\cdot (x-h)^{2}\)     (1)

Where:

Please notice that p < 0 when the directrix is above the focus, otherwise p < 0. The vertex is the midpoint of line segment between the directrix and the focus.

Now we proceed to derive the standard equations of the parabola:

1) Vertex:

(h, k) = 0.5 · (- 6, 4) + 0.5 · (- 6, - 3)

(h, k) = (- 6, 0.5)

Least distance:

p = - 3.5

y + 6 = - (1/14) · (x + 6)²

2) Vertex:

(h, k) = 0.5 · (0, - 4) + 0.5 · (0, - 5)

(h, k) = (0, - 4.5)

Least distance:

p = 0.5

y = (1/2) · (x + 4.5)²

3) Vertex:

(h, k) = 0.5 · (2, 3) + 0.5 · (2, 7)

(h, k) = (2, 5)

Least distance:

p = 2

y - 5 = - (1/8) · (x - 2)²

4) Vertex:

(h, k) = 0.5 · (- 2, - 6) + 0.5 · (- 2, - 4)

(h, k) = (- 2, - 5)

Least distance:

p = 1

y + 5 = (1/4) · (x + 2)²

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Mugabe gained power by using political strategies, forming alliances, and exploiting his status as a liberation hero within ZANU-PF.

Robert Mugabe, the former president of Zimbabwe, was able to build power through a combination of political strategies and alliances. One key factor was his involvement in the liberation struggle against white minority rule in Rhodesia (now Zimbabwe).

Mugabe emerged as a prominent figure within the Zimbabwe African National Union (ZANU) party, which later merged with the Zimbabwe African People's Union (ZAPU) to form the Zimbabwe African National Union - Patriotic Front (ZANU-PF). Mugabe's role as a liberation hero and his ability to mobilize support among the majority black population of Zimbabwe gave him a strong power base.

Within ZANU-PF, Mugabe strategically positioned himself and gained influence by forming alliances and outmaneuvering rivals. He rose to become the party's leader and played a key role in negotiating the Lancaster House Agreement in 1979, which paved the way for Zimbabwe's independence in 1980. Mugabe became the country's first prime minister and later transformed the position into an executive presidency, consolidating his authority.

Mugabe maintained power through various means, including controlling key institutions such as the military, intelligence agencies, and the ruling party. He also utilized patronage networks, distributing resources and positions to loyal supporters within the party and government. Mugabe's policies, such as the controversial land reform program, further solidified his power base by appealing to nationalist sentiments and redistributing land from white farmers to black Zimbabweans.

However, Mugabe's consolidation of power was also marked by authoritarianism, human rights abuses, and a declining economy. His grip on power faced challenges over the years, including opposition movements, internal party factions, and economic crises. Ultimately, his rule came to an end in 2017 when he was ousted from power following a military intervention.

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Contaminants are substances or agents that are present in a material or environment, frequently in unwanted or hazardous proportions, and which may harm the environment, and human health.

They include pollutants that are released from industrial operations, agricultural practices, or human activities, such as pesticides, heavy metals, volatile organic compounds (VOCs), and polychlorinated biphenyls (PCBs).

They include pollutants that are released from industrial operations, agricultural practices, or human activities, such as pesticides, heavy metals, volatile organic compounds (VOCs), and polychlorinated biphenyls (PCBs).

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The speed of Olivia when she made it to the bottom of the hill is 14m/s.

Kinematics is the study of mechanical points, bodies, and systems in motion without taking into account the forces acting on them or the corresponding physical qualities.

Kinematics equations of motion define the fundamentals of an object's motion, such as its position, velocity, or acceleration over time. These three equations of motion control how an item moves in one, two, and three dimensions.

Kinetics considers physical forces as well as material characteristics such as mass stiffness and tensile or compressive strength. These characteristics can be used to take a theoretical model from kinematics and use physics and thermodynamics to determine how to construct a workable, dependable, and functional real-world system.

Given,

Initial velocity, u = 4m/s

Acceleration, a = 2m/s-2

Displacement, s= 45m

we know that,

\(v^{2}= u^{2} + 2as\), where v= final velocity

substituting the value in the above equation, we got

\(v^{2}\) = \(4^{2} + 2(2)(45)\)

v = \(\sqrt{196}\)

v = 14 m/s

Thus, the speed of Olivia going down the hill is 14m/s.

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Answer:

Explanation:

average speed = 90 km / hr

Let the total distance be 2 d .

time required to cover the time = 2 d / 90

time taken   to cover distance d at 50 km /h = d / 50

time required to cover the  nd half = 2 d / 90 -  d / 50

.02222 d  - .02 d = .002222 d

speed required = d/2 / .002222d

1 / 2 x .002222

= 225 km /h .

The mass would stay the same, but the weight would be only 16.5%.

Explanation:

Mass is the amount of "matter" in an object, which stays the same everywhere. Weight is the force acting on an object by gravity, which changes depending on nearby bodies. In this case, weight on the moon is 16.5% of that on Earth.

Answer:

In this case, the specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.

Explanation:

Specific heat is the amount of heat required to raise the temperature of a unit mass of a substance by one degree. Specific heat is also known as specific heat capacity or specific heat capacity.

In other words, it is defined as the amount of energy that we must contribute to increase its temperature.

The specific heat or heat capacity of a certain body is called by the letter "c".

The expression to calculate the specific heat of a substance is:

c = Q / m.Δt

where Q represents the heat energy transfer between the system and its environment, m the mass of the system and Δt the temperature variation to which it is subjected.

In this case, the specific heat capacity of oxygen is 918 J/kg °C. That means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.

The number that completes the sentence is 1 kg

Specific heat capacity is the amount of heat required to raise 1kg of the substance by 1 °C or 1 K. The S.I unit of specific heat capacity is J/kg°C

The substance in question is oxygen.

From the question,

If the specific heat capacity of oxygen is 918 J/kg°C, It means that it takes 918 J of energy to raise 1 kg of oxygen by 1°C.

Hence, The number that completes the sentence is 1 kg.

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The percentage of the lost kinetic energy of the car, at the midpoint of the skid, is 50%.

In physics, work is the measurement of the energy used to move objects. When you are walking, you're using energy to move your body so the work done would be greater than zero.

According to work-energy theorem, work is equal to force times displacement (W = F · x).

A type of energy is kinetic energy, which is the energy of a moving object. If an object is at rest, its kinetic energy is zero. Kinetic energy is equal to one half of a mass times velocity squared (KE = 0.5 · m · v²).

When a car goes into a skid and comes to a gradual stop, at the midpoint of the skid the car has spend 50% its kinetic energy. This is simply because the velocity of the car at the midpoint of the skid is half the velocity of the car when the car starts going into a skid, assuming constant acceleration.

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The charge on the red sphere, q_red, can be calculated in terms of q, d1, d2, and θ. The formula to determine q_red is q_red = (d2 / d1) * q * tan(θ).

This formula considers the distances d1 and d2 between the yellow and red spheres, respectively, as well as the angle θ between the line connecting the spheres and a reference line. By plugging in the known values and using this formula, we can find the value of q_red.

To determine the charge on the red sphere, q_red, we can use the concept of electric field lines and the geometry of the setup. The formula for calculating q_red in terms of q, d1, d2, and θ is q_red = (d2 / d1) * q * tan(θ).

This formula is derived from the fact that the electric field lines radiate outwards from a charged object and are proportional to the charge. The electric field at a point due to the yellow sphere can be expressed as E_yellow = k * q / d1^2, where k is the electrostatic constant.

The electric field due to the red sphere at the same point can be expressed as E_red = k * q_red / d2^2. Since the electric field lines from both spheres must be perpendicular to each other, the tangent of the angle θ can be defined as tan(θ) = E_red / E_yellow.

Rearranging this equation, we find q_red = (d2 / d1) * q * tan(θ). This equation relates the charge on the red sphere (q_red) to the charge on the yellow sphere (q), the distances between the spheres (d1 and d2), and the angle (θ). By plugging in the known values for q, d1, d2, and θ into this equation, we can calculate the value of q_red.

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The emf of an individual lead acid cell in a standard automobile battery is 2.0 V.

Electromotive force, in terms of emf, is the electric action produced by a non-electric source. Devices that convert other forms of energy into electrical energy, such as batteries or generators, produce an emf as their output

The total emf of the battery is 12.0 V and there are six lead acid cells in series. To find the emf of an individual cell, we can divide the total emf by the number of cells:

The emf = 12.0 V/6

The emf  = 2.0 V

Therefore, the emf of an individual lead acid cell is 2.0 V.

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Answer:

Remember the equation:

F = m*a

where F is force, m is mass and a is acceleration.

If we have F constant. and we want that increases, then we can have the case where m decreases.

The mass can decrease in cases like a rocket, where as the fuel of the rocket consumes, the mass of the rocket decreases and the acceleration increases.

b) The cases where a constant force results in a constant acceleration of zero, is when the force is canceled, an example of this is the constant force of the gravity in all the objects. The objects that are in the ground are being affected by this force, but the gravitational force is canceled with the normal force of the ground. Then we have a constant force that does not cause any acceleration.

Answer:

Option 4

Explanation:

The difference between the Paleozoic and Mesozoic Era is that animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic Era.

The Paleozoic is the first part of the Phanerozoic Era, and is followed by the Mesozoic Era, which is the second part.

The difference between the Paleozoic and Mesozoic eras is "Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era." The correct option is D.

The Paleozoic era and Mesozoic era are two major divisions of geological time.

The Paleozoic era, also known as the "age of invertebrates," spanned from about 541 million years ago to about 252 million years ago. During this era, the first multicellular organisms evolved, and there was a rapid diversification of life forms. This era saw the rise of fish, amphibians, and reptiles, as well as the first forests and the development of early land plants. The Paleozoic era ended with a mass extinction event that wiped out about 90% of all marine species and nearly 70% of all land species.

The Mesozoic era, also known as the "age of dinosaurs," spanned from about 252 million years ago to about 66 million years ago. During this era, reptiles continued to dominate the land, and dinosaurs evolved and became the dominant terrestrial animals. This era also saw the rise of birds, the evolution of flowering plants, and the emergence of mammals. The Mesozoic era ended with a mass extinction event that wiped out the non-avian dinosaurs, as well as many other species of plants and animals.

Here in the Question,

Option A, "Animals lived in the water during the Mesozoic and on land in the Paleozoic," is not a correct difference between the two eras. In fact, animals lived both in the water and on land during both the Paleozoic and Mesozoic eras. The Mesozoic era is famous for the rise of the dinosaurs, which were primarily land-dwelling animals, while the Paleozoic era saw the rise of amphibians and the first land-dwelling vertebrates.

Option B, "The first birds emerged in the Paleozoic era while mammals first emerged in the Mesozoic," is also not a correct difference between the two eras. In fact, birds did not emerge until the Jurassic period of the Mesozoic era, while the first mammals are believed to have emerged during the late Triassic period.

Option C, "Many different species of dinosaurs lived in the Mesozoic, but they all died off in the Paleozoic," is not correct either. Dinosaurs first appeared during the Mesozoic era and dominated the terrestrial ecosystem for more than 150 million years before they went extinct at the end of the Cretaceous period. The Paleozoic era ended more than 100 million years before the first dinosaurs appeared.

Therefore, The correct option is D. Animal complexity increased during the Paleozoic while the first flowering plants appeared in the Mesozoic era.

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Hello, use the formula:

Pe = mgh

Data:

Pe = Potential energy = ¿?

m = Mass = 48 kg

g = Gravity = 9,81 m/s²

h = Height = 7 m

Replacing according our data:

Pe = 48 kg * 9,81 m/s² *  7 m

Pe =3296,16 J

The potential energy of the skateboarder is 3296,16 Joules

We know that the impulse if related to the momentum as:

and related to the average force and the time of the collision by:

Which means that:

a)

In this case the force is 1250 N, the time is 0.16 s, the initial velocity is 0 and the mass is 102.5 kg, then we have:

Therefore the velocity is 1.951219512 m/s.

b)

In this case the force is 1250 N, the time is 0.16 s, the initial velocity is 0 and the mass is 4.64 kg, then we have:

Therefore the velocity is 43.10344828 m/s.

a) To calculate the initial thermal energy of each substance, we can use the formula:

Thermal energy = mass * specific heat capacity * temperature

For helium:

Initial thermal energy of helium = 2.0 g * specific heat capacity of helium * 300 K

For oxygen:

Initial thermal energy of oxygen = 8.0 g * specific heat capacity of oxygen * 600 K

The specific heat capacities of helium and oxygen can be found in reference materials or tables.

b) The final thermal energy of each substance can be determined using the principle of energy conservation. Assuming there is no heat transfer to the surroundings, the total initial thermal energy of the system is equal to the total final thermal energy of the system. Therefore, the final thermal energy of helium and oxygen would be the same as their initial thermal energy values calculated in part (a).

c) To determine the amount of heat transferred and its direction, we need to consider the specific heat capacities and the temperature change. The heat transfer can be calculated using the formula:

Heat transfer = mass * specific heat capacity * temperature change

Since the final and initial thermal energies are the same for each substance, we can conclude that no heat is transferred between helium and oxygen.

d) To calculate the final temperature of the mixture, we can use the principle of energy conservation, which states that the total thermal energy of the system remains constant. Assuming no heat is lost to the surroundings, the sum of the final thermal energies of helium and oxygen is equal to their initial thermal energies. By rearranging the equation and solving for the final temperature, we can find the value.

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