microwaves are produced by ​

Answer:

200 meters

Explanation:

20 x 10 = 200

Answer: -0.10m/s

Explanation:

khan academy

Answer:

ways can carry either __machanical___ or electromagnetic energy

An object floats in water with 5/8 of its volume submerged. The ratio of the density of the obkect to that of water is 5/8.

What is meant by density ?

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The weight of the Mars Rover Curiosity on Earth and on Mars is 8820 N and 3330 N respectively.

The weight of an object is given by the product of its mass and the gravitational field strength at its location.

On Earth:

On Mars:

Therefore, the weight of the Mars Rover Curiosity on Earth and on Mars are 8820 N and 3330 N respectively.

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Answer:

Energy = Potential Energy + Kinetic Energy

E = M g h + 1/2 M v^2

On the way up h (height) is increasing and the velocity v is decreasing.

Between C and E the given conditions hold

Explanation:

\(from \: einstein \: equation : \\ E = m {c}^{2} \\ E = 1.5 \times {(3 \times {10}^{8} )}^{2} \\ E = 1.35 \times {10}^{17} \: joules\)

The electric potential energy would be 0.5  * 10 ∧-8 volts

Using the formula

E = 1/2 * C * V²

Where

E = electric potential energy

C = capacitance = charge

V = voltage applied

Substitute values into formula

E = 1/2  * 1.0x 10∧-10  *  100.0

E = 1/2 * 1.0x 10∧-8

E = 0.5  * 10 ∧-8 volts

Hence, the electric potential energy is 0.5 * 10 ∧-8 volts

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Answer:

can you make the pic more clear

i think it's D

Answer:

In a material, the magnetic behavior depends on the alignment of magnetic moments of the atoms. Magnetic moments are generated by the motion of the electrons in the atoms. When the magnetic moments of atoms in a material are aligned in a specific pattern, it creates a magnetic field which results in the material being magnetic.

In many materials, the magnetic behavior arises due to the alignment of magnetic domains, which are regions of atoms with magnetic moments aligned in the same direction. When many domains with aligned magnetic moments are present in a material, the material becomes magnetic.

The magnetic behavior of a material depends on the number of electrons and the arrangement of those electrons in the atoms. In particular, for an atom to have a magnetic moment, it must have unpaired electrons, meaning electrons that are not paired with another electron with the opposite spin. When these unpaired electrons in the atoms are aligned, they generate a magnetic moment. If all electrons are paired, there will not be a net magnetic moment, so the material will not be magnetic.

So, in summary, the magnetic behavior of a material is determined by the alignment of magnetic moments of atoms. When the magnetic moments of many atoms in a material align in the same direction, it creates a magnetic field, leading to a material being magnetic. This alignment is usually present in magnetic domains consisting of atoms with unpaired electrons.

Answer:

it will most likely be the free energy

Mona's conclusion that convection is the main way that energy escapes from the water when there is no lid may or may not be a good conclusion, depending on the context and information provided.

Convection is a process of heat transfer that involves the movement of fluids (in this case, the water) due to differences in temperature. It occurs when warmer portions of the fluid rise and cooler portions sink, creating a circulating flow.

To determine if Mona's conclusion is valid, additional information is needed. Factors such as the presence of other heat transfer mechanisms (such as radiation or evaporation), the specific setup of the experiment, and the conditions under which the observations were made are essential.

If Mona's experiment only considered convection as the primary mechanism for energy escape and excluded other factors, her conclusion might be incomplete or inaccurate. To draw a more comprehensive conclusion, it is necessary to consider other potential heat transfer mechanisms and perform further investigations or provide additional supporting data.

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Answer:

Explanation:

1. Ingenuity is a flight test.

Ingenuity is what is known as a technology demonstration – a project that seeks to test a new capability for the first time, with limited scope. Previous groundbreaking technology demonstrations include the Mars Pathfinder rover Sojourner and the tiny Mars Cube One (MarCO) CubeSats that flew by Mars in 2018.

Ingenuity features four specially made carbon-fiber blades, arranged into two rotors that spin in opposite directions at around 2,400 rpm – many times faster than a passenger helicopter on Earth. It also has innovative solar cells, batteries, and other components. Ingenuity doesn't carry science instruments and is a separate experiment from the Mars 2020 Perseverance rover.

2. Ingenuity will be the first aircraft to attempt controlled flight on another planet.

Answer:

\(V_g=63.3m/s\)

Explanation:

From the question we are told that:

Speed of Plane \(v_s=60m/s\)

Wind speed \(V_w=20m/s\)

Generally the equation for Speed of plane relative to the ground V_g is mathematically given by

 \(V_g=\sqrt{V_s^2+V_w^2}\)

 \(V_g=\sqrt{60^2+20^2}\)

 \(V_g=\sqrt{4000}\)

 \(V_g=63.3m/s\)

Answer:

Explanation:

The Spanish flu pandemic of 1918, the deadliest in history, infected an estimated 500 million people worldwide about one-third of the planet’s population and killed an estimated 20 million to 50 million victims, including some 675,000 Americans. The 1918 flu was first observed in Europe, the United States and parts of Asia before swiftly spreading around the world. At the time, there were no effective drugs or vaccines to treat this killer flu strain. Citizens were ordered to wear masks, schools, theaters and businesses were shuttered and bodies piled up in makeshift morgues.

Does this sound familiar?

Its the same thing but with a different name called the Corona virus pandemic the same thing happened in 1918 and now it is happening again in 2020 , but in in 2020 there are far less people infected by the Corona virus as compared to the Spanish flu the numbers approximate around 70 million infected and deaths are around 2 million.

The rapid spread of Spanish flu in the fall of 1918 was at least partially to blame on public health officials unwilling to impose quarantines during wartime. The public health response to the crisis in the United States was further hampered by a severe nursing shortage as thousands of nurses had been deployed to military camps and the front lines. But one of the chief reasons that the Spanish flu claimed so many lives in 1918 was that science simply didn’t have the tools to develop a vaccine for the virus. Microscopes couldn’t even see something as incredibly small as a virus until the 1930s.

That is why the Spanish Flu claimed so many lives in 1918 and the Corona Virus didn't claim that many.

The Corona Virus patients with respect to Spanish Flu patients exponentially decreased because in 2020 we had the specific tools to fight the virus and since mankind was aware when the world engrossed into the pandemic 100 years before the new the risks that it could impose on the world , People started to Quarantine themselves, more nurses/doctors are available rather than in the era of the 19th century.

Mathematically we would say that the exponential growth would be:

\(y=ab^x\)

This is an exponential function, which means as you increase  x , y  increases exponentially, and where a is the initial value and b is the growth factor.

For example:

There are 100,000 cases of Coronavirus when the virus outbroke. If the number of cases doubles every week then how many cases would be there in 10 weeks?

So the solution would be

\(y=ab^x\\y=100000(2)^{10}\\y=102400000\)

Which means people infected with the virus would be approximate 102.5 million. But since this kind of pandemic already broke out in 1918 called the Spanish flu mankind was wise and controlled its growth factor (b) by Quarantining people , shutting down businesses, schools  and implying them to work from home , closing off cafeteria's restaurants for dine in purposes and just allowing take away to reduce human contact, and since 1918 we have more doctors and nurses to treat the infected in 2020 we reduced the outbreak to 70 million in about 10 months other wise it could have been 100 million in just 2.5 months as we can see.

So guys stay indoors just go out if you REALLY need something, avoid meeting others , wear masks and gloves :)

force applied to a person 3 m/s2 right An item with mass will change its velocity in response to a push or pull.

A pressure of this magnitude can be described as either a push or a pull, which is perfectly appropriate. A force does not "exist in" or "contain" an object. A force from the other can exert pressure on something. No distinction can be made betweeneen living and non-living things in the concept of a force.

As a result of interaction with another object, an object feels a push or pull. A force is applied to one of the things when two objects interact.

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Answer:

What’s the question??

Explanation:

It uses a decimal system of measurement, this feature makes the metric system easy to use, therefore the correct answer is option B

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation. Any additional quantity of that type can be stated as a multiple of the measurement unit.

The metric system is easy to use because it uses a decimal system of measurement.

Thus, The metric system is simple to use because it employs a decimal system of measurement, so option B is the appropriate response.

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In the given case on vectors, the displacements are not equal.

When a particle has gone the least distance, it is referred to as displacement. Both the magnitude and the direction are represented by the vector quantity. Vectors are a type of physical quantity that may be fully represented by both their magnitude and direction. For instance, distance travelled and speed, etc.

A line with an arrow on it is used to symbolise a vector quantity. The physical quantity's size is indicated by the arrow's length, and its direction by the arrow's direction. Given that vector A is longer than vector B, vector A must have a greater magnitude than vector B. These are not equal displacements as a result.

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Complete Question:

Two vectors pointing right starting at the same position. Vector A is on top and longer. Vector B is shorter and below. Are the two displacements equal? Explain your answer.

Answer:

Both are zero.

Explanation:

Tycho Brahe was the scientist who came to the conclusion that the cosmos was "Earth Centered" after failing to notice any seasonal variations in the background star "stellar parallax."

An Earth-centered perspective of the cosmos. Claudius Ptolemy believed that the Earth was at the centre of the universe. Before the controversial findings of Copernicus, Galileo, and Newton, this belief persisted for 1400 years.

Around 380 B.C., a scientist by the name of Eudoxus developed the first geocentric universe model. The stars, the sun, and the moon are all incorporated into the sequence of cosmic spheres that make up Eudoxus' universe model.

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Answer:

C. 750 N. left

Explanation:

let the force to the right be positive, and the left be negative

Step one:

given

mass of crate m= 500N

1450N force left

Frictional force of 200 N -----this opposes the motion

500 N opposing force to the right

The net force is equal to the summation of all the forces in Newton

Net force= -1450+200+500

Net force=-750N

The direction is right

Psychologists working from the humanistic perspective help people do all of the following except repress unwanted emotions

The scientific study of the mind and behavior is called psychology. Psychologists are actively involved in researching and comprehending how the mind, the brain, and behavior work.

The biological, psychodynamic, behavioral, cognitive, and humanistic schools of thought in psychology.

The following are typical actions taken by psychologists:

Conduct research to better understand behavior and brain function.

Observations, interviews, surveys, tests, and other methods should be used to gather information.

Discover patterns that will aid in understanding and behavior prediction.

Increase understanding between individuals and groups by utilizing their knowledge

Create initiatives that address psychological issues to enhance workplaces and schools.

Work with individuals, couples, and families to assist them in modifying their behavior as desired.

Determine and classify emotional, behavioral, and mental disorders.

Create and implement treatment plans

Thus, Psychologists working from the humanistic perspective help people do all of the following except repress unwanted emotions, therefore the correct answer is option B.

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During the earliest stages of the universe, the only things that existed were subatomic particles such as protons, neutrons, and electrons. These particles came together to form the first atoms, which were primarily hydrogen and helium.

The universe was also filled with a hot, dense plasma of particles and radiation, known as the cosmic microwave background radiation.

Hence, as the universe expanded and cooled, these atoms and radiation would play a key role in the formation of galaxies, stars, and the larger structures we see today.

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Answer: Subsidary

Explanation: The term "subidiary" refers to something that is subordinate or secondary to a larger entity or main object. In the context of the question, a "form existing inside of a larger form" could be considered a subsidiary form, where the larger form is the main entity and the smaller form is a subordinate element within it. For example, in a musical composition, a subsidiary form could be a theme or motif that is repeated throughout the piece, while the larger form could be the overall structure or arrangement of the music.

Answer:

Equations of motion relate the displacement of an object with its velocity, acceleration and time. s=vt where s is the displacement, v the (constant) speed and t the time over which the motion occurred. ...

Displacement with negative acceleration: s, equals, v, t, minus, one half, a, t, square...

Displacement with positive acceleration: s, equals, u, t, plus, one half, a, t, squared,s...

Velocity squared: v, squared, equals, u, squared, plus, 2, a, s,v2=u2+2as

Velocity: v, equals, u, plus, a, t,v=u+at

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

How do digital signals work?

An established or one that represents data as a step made up of discrete values is known as a digital signal. There is no noise produced by digital signals. Electronic signals sent as pulses are used to transmit digital signals to computers. These signals can be found in things like digital phones and computers.

Because digital signals are used to transport data to and from the cloud, it should be noted that videos are said to stream from the cloud to a computer without quality degradation.

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

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Answer:

Larger tubines generate more electricity.

Explanation:

Larger blades allow the turbine to capture more of the kinetic energy of the wind by moving more air through the rotors. However, larger blades require more space and higher wind speeds to operate. This distance is necessary to avoid interference between turbines, which decreases the power output.

The resistance of the copper wire at 80°C is r = 5.952 ohms

Given copper cable length is 1.2 km

The area of cross section given is 5 mm^2

Thus the equation for resistivity is:

p (t) = p (0) × ( 1 + a × ( change in temperature )

p(t) = 0.02 × 10^-6 × ( 1 + 0.004 × 60 )

p (t) = 2.48 × \(10^-^8\) ohm m

r = ( p × l ) ÷ a

r = (  2.48 × \(10^-^8\) × 1200 ) ÷ 5 × \(10^-^6\)

r = 5.952 ohms

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Answer:

Power of 5 watts is used

Explanation:

Mechanical Work and Power

Mechanical work is the amount of energy transferred by a force.

Being F the force vector and s the displacement vector, the work is calculated as:

\(W=\vec F\cdot \vec s\)

If both the force and displacement are parallel, then we can use the equivalent scalar formula:

W=F.s

Power is the amount of energy converted per unit of time. The SI unit of power is the watt, equal to one joule per second.

The power can be calculated as:

\(\displaystyle P=\frac {W}{t}\)

Where W is the work and t is the time.

It's required to calculate the power used in t=30 seconds when W=150 Joules of work are completed. Substitute in the formula:

\(\displaystyle P=\frac {150}{30}\)

P = 5 Watt

Power of 5 watts is used