Suppose a pv farm requires 2,000 panels to generate power at 40% efficiency. If a new panel were invented that was 50% efficient, how many panels would be required?.

Answer:

the acceleration of an object is directly related to the mass of the object

Answer:

(A)    conduction implies that the objects are in contact

Inside the doppler impact,  elements that have an effect on the frequency of sound waves consist of; the speed of the source and the velocity of the observer.

The rate of alternate inside the function of an object in any route. velocity is measured because of the ratio of distance to the time in which the space became covered. speed is a scalar amount because it has the handiest route and no importance.

Speed can be the notion of the rate at which an item covers distance. A short-shifting object has a excessive velocity and covers a substantially huge distance in a given amount of time, even as a gradual-moving item covers a relatively small amount of distance in the equal amount of time.

The primary unit or the S.I. unit of speed is m/s or ms⁻¹.

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A 2.0-kilogram cart traveling at a constant speed in a horizontal circle of radius 3.0 meters. The magnitude of the centripetal force of the cart is 24 newtons. The speed of the car is 6 m/s. Thus, Option A is the correct answer.

To find the speed, the given values are,

Mass m = 2 Kg

Radius r =3 meters

Centripetal force = 24 Newtons.

A centripetal force is the force which is made up of two Latin words centrum which means center and peterum which means to seek.

It is defined a force which make a body to follow a curved path. The direction of this force is always orthogonal to the body's motion and it is always towards the fixed point which is instantaneous center of the path's curvature.

Centripetal force is expressed according to the formula;

F = mv²/r

m is the mass of the body

v is the speed of the cart

r is the radius

Substituting the values into the formula and get v,

24 = 2v²/3

24×3 = 2v²

72 = 2v²

v² = 72/2

v² = 36

v =√36

v = 6m/s

Hence, the speed of the cart is 6m/s. Thus, Option A is the correct answer.

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Answer:

A

Explanation:

Potential energy = m g h       unless h changes there is zero PE change

A car is driving over a hill with a radius of curvature of 60 meters . With a speed of 24.25 m/s the car be going in order for the driver to feel weightless

m[tex]v^{2}[/tex] / r  + Normal = mg

for weightless  Normal = 0

m[tex]v^{2}[/tex] / r = mg

v = [tex]\sqrt{rg}[/tex]

v = [tex]\sqrt{60 * 9.8}[/tex] = 24.25 m/s

A car is driving over a hill with a radius of curvature of 60 meters. With a speed of 24.25 m/s the car be going in order for the driver to feel weightless

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4.76 kg [tex]m^{2} / sec[/tex] will be  the angular momentum of a 0.310 kg ball rotating on the end of a thin string in a circle of radius 1.45 m at an angular speed of 10.6 rad/s

L = m*v*r

m = mass

v = velocity

r = radius  

L (angular momentum ) = m*v*r

                                      =  0.310 * 1.45 * 10.6  

                                      = 4.76 kg [tex]m^{2} / sec[/tex]

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The object (2)  in the table is the object that would weigh highest on earth.

We know that the mass of the object would be constant irrespective of the place where the object is weighed. The weight of the object on the other hand is dependent on the location where the object is weighed. If the object is weighed on earth, the weight of the object would be dependent on the value of the acceleration due to gravity of the object.

Let us obtain the masses of each of the materials;

Using force = mass * acceleration

mass = force/acceleration

1) 80 /5.5 = 14.5 Kg (Weight = 145 N)

2) 55/2.0 = 27.5 Kg (Weight = 275 N)

3) 23/3.7 = 6.2 Kg (Weight = 62 Kg

4) 63/6.0 = 10.5 Kg (Weight = 105 N)

The weight of the  object (2) is the heaviest on earth.

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Answer:

See below

Explanation:

Velocity is how fast an object is moving....acceleration is how fast the velocity is changing .

Semiconductor materials are categorized as insulators if their band gaps are bigger than 3 and 5 eV.

An electron can easily move from the valence band to the conduction band in the presence of external thermal energy because semiconductor materials have low but finite band gap energies. The usual band gap energy range of semiconductor materials is 0.5eV–3eV.

Contrary to ordinary semiconductors like silicon, which have bandgaps in the range of 0.6 to 1.5 eV, wide-bandgap materials have bandgaps above 2 eV. In a p-type semiconductor, the majority of the carriers are holes, while the minority are electrons.

The advancement of communications, computing, healthcare, military systems, transportation, clean energy, and numerous more uses is made possible by semiconductors, which are a crucial part of electronic equipment.

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Answer:

Explanation:

This is visible light.

The colors violet, blue, green, yellow and red having the given range of wavelength, comes at the part of visible light in the spectrum.

Electromagnetic spectrum is the arrangement of electromagnetic radiations in the order of their increasing frequency and decreasing wavelength.

Here,

The colors violet, blue, green, yellow and red are given according to their wavelengths ranging from 400 nm to 650 nm.

The electromagnetic spectrum includes the various radiations, which are arranged accordingly from the longest to shortest wavelength and from the lowest to the highest frequency.

The spectrum includes the range from the radio waves to gamma rays.

In this, the radio waves lies in the frequency range of about 3 x 10¹¹ Hz and wavelength greater than 1 nm and the spectrum extends upto the gamma rays that lies in the frequency range of 10²⁰- 10²⁴ Hz and wavelength less than 10⁻¹²m.

The given data of colors have a wavelength range of 400 nm to 650 nm. Therefore, the given colors can be placed at the part of visible light whose wavelength lies between 400 nm to 750 nm, in the spectrum.

Hence,

The colors violet, blue, green, yellow and red having the given range of wavelength, comes at the part of visible light in the spectrum.

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Answer:

Explanation:

The moon is held in its orbit around Earth by gravity. The moon also feels a gravitational pull from the sun. Which of the following is true?

According to Newton's third law, the interaction forces are the same.

(a) The force of the moon acting on the sun is equal to the force of the sun acting on the moon.

dolphin traveled after 2 h is equal to 6 km .

What is velocity ?

Velocity is the directional velocity of a moving object, observed from a given frame of reference and indicating the rate of change of position measured at a given time reference (eg 60 km/h northward). Velocity is a fundamental concept in kinematics, a branch of classical mechanics that describes the motion of bodies.

Velocity is a physical vector quantity. Both magnitude and direction are required to define it. The scalar absolute value (magnitude) of velocity is called velocity, and its magnitude is a consistent derived unit measured in the SI (metric) system as meters per second (m/s or m⋅s−1). An object is said to be accelerating if its velocity, direction, or both change.

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Although GEO Satellites are the most expensive to build and launch, they also have the longest orbital life of many years.

A satellite or artificial satellite tv for pc is an object intentionally located in orbit in an outer area. besides passive satellites, most satellites have an electricity generation gadget for devices on board, consisting of solar panels or radioisotope thermoelectric turbines.

In fact, they make a contribution to our nicely-being and give us the chance for us to fulfill many crucial needs and demanding situations in the world. they are beneficial in lots of fields, which include Earth commentary, communications, navigation, and science. satellite tv for pc statistics helps: guide the economic system.

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The ball will hit the ground after 0.408 sec and the horizontal range of the projectile is 1.414 m.

When a particle throws obliquely near the surface, it follows along a curved path under constant acceleration directed towards the center of the earth. The path followed by the particle and the motion is called projectile motion.

Consider the 'u' is the initial velocity of the particle and θ is the angle with the horizon,

The time of the flight =  (2u sinθ)/g

The horizontal range (R) = (u² sin2θ)/g

Given, the initial velocity of the projectile, u 4 m/3

The angle above the horizon, θ = 30°

The time  the ball falls back and hits the ground (t):

t = (2u sinθ)/g = (2 × 4 sin30)/9.8 = 0.408 s

The horizontal range (R) of the projectile = (u² sin2θ)/g

R = (4² sin60)/9.8

R = 1.413 m

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Low-pressure areas experience restless weather with precipitation and storms, while high-pressure areas experience consistently dry weather over extended periods of time.

Air pressure, also called atmospheric pressure, is caused by the volume of air molecules in the atmosphere and exerts a force on the earth through gravity. Barometric pressure varies according to various conditions, and high and low pressure indicates a particular type of weather.

Ascending air creates a low pressure system and descending air creates a high pressure.

A depression is a large mass of air that rises because the ground or water below is warm. Air heats up, expands, and becomes less dense. If the air parcel also contains water, it will be lighter in weight due to water vapor, whose molecules are lighter than air molecules. The end result is moist, less dense air that rises in the upper atmosphere and begins to cool.

A minimum temperature of degrees tends to be erratic weather, with the potential for clouds, high winds and precipitation. Storms and hurricanes can form as low pressure systems intensify.

A high-pressure system is cold air that moves from the upper layers of the atmosphere to the surface. Air becomes denser as it descends, and water evaporates into air masses. There is no cloud-forming water and the air is stable, clean and dry. Low humidity creates high air pressure, which is usually relieved. However, if the high-pressure dense air becomes too warm, drought can occur.

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71.43 J of work is required, using an ideal Carnot refrigerator, to remove 1 j of heat energy from helium at 4 k and eject this heat to a room temperature (293 k) environment

coefficient of performance = T / ΔT

                                             = 4 / 293 - 4 = 0.014

Qc (heat) = work * coefficient of performance

work = Qc /  coefficient of performance

        = 1 / 0.014 = 71.43 J

71.43 J of work is required

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Answer:Since Mercury's period is 88 days (page 182), the period of this hypothetical planet would be 0.354 ´ 88 = 31 days

Explanation: I hope this is correct

The prices of the different units of volume and mass of mercury are as follows as the Price of one pound of mercury = $2.059

The price of the intermediate volumes of Mercury are determined as follows:Price of 1 g of mercury = $0.00454, Price of 1 cm³ of mercury = $0.0614 and Price of 1 in³ of mercury is $0.996 and Price of 1 g of mercury = $0.00454, Price of 1 cm³ of mercury = $0.0614 and Price of 1 in³ of mercury is $0.996

b. 1 pound = 453.592 g

76 pounds = 76 * 453.592 g = 34473 gPrice of 1 g of mercury = $156.50/34473 Price of 1 g of mercury = $0.00454

Volume of 34473 g of mercury = 34473/13.534

Volume of 34473 g of mercury = 2547.14 cm³

Price of 1 cm³ of mercury = $156.50/2547.14 cm³

Price of 1 cm³ of mercury = $0.0614 Price of 1 in³ of mercury:

1 cm³ = 0.0610 in³

2547.14 cm³ = 2547.14 * 0.0610 in³

2547.14 cm³ = 157.02 in³

Price of 1 in³ of mercury = 156.5/157.02

Price of 1 in³ of mercury = $0.996

In conclusion, the prices of the different units of volume and mass of mercury are found by conversion.

Therefore, Mercury has an orbital period of about 88 Earth days.

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Answer:

[tex] \Huge{\boxed{84 N}} [/tex]

Explanation:

The amount of force required here can be found by using the formula

where

mass is in kg

acceleration in m/s²

From the question

mass = 4 kg

acceleration= 21 m/s²

We have

force = 4 × 21 = 84

We have the final answer as

High-low placement is a spatial technique do objects placed lower on the picture plane appear to be closer than objects placed higher on the picture plane

It is an illusion to the eye created by the artist , to give a 3 Dimension effect on a picture plane . It is very obvious that we can only show 2D on plane , but to also show changes in z axis , this technique is been used

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Tripling the enzyme only increases the number of workers who still happen to randomly collide with the vast quantities of substrate while operating at 50% of their capacity.

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Using the concepts of impulse, we got that   8.8Nsec is the the magnitude of the impulse delivered to the baseball by the bat when a batter applies an average force of 8000 n to a baseball for 1. 1 ms.

In classical mechanics, impulse (symbolized by J or Imp) is  integral of a force, F, over the time interval, t, for which it acts. Since force is the vector quantity, impulse is also a vector quantity. Impulse applied to the object produces the equivalent vector change in its linear momentum, also in the resultant direction.

We know very well that impulse is given by =Force × Time

 We have magnitude of force is 8000Newton and time is 1ms which is equivalent to (1/1000)sec.

Therefore, impulse value is =Force × Time

             =>impulse=8000×(1.1)×(1/1000)

             =>impulse=8×1.1

              =>impulse=8.8Nsec

Hence, when A batter applies an average force of 8000 n to a baseball for 1. 1 ms, the magnitude of the impulse delivered to the baseball by the bat is 8.8Nsec.

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Characteristics, such as field name and data type are properties that define a field.

The properties of a given discipline or research field are those that characterize the use of a particular type of information within the range of the attained field.

For example, genomics is a field characterized to make use of sequencing data, which refers to the linear order of nucleotides in the DNA sequence to provide useful information about the gene content and the presence of regulatory non-coding sequences.

Therefore, with this data, we can see that the properties of a given discipline or research field are mainly associated with the type of information that such discipline uses to make predictions in a given research and they are also related to the outcomes we can expect from such data.

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Contact High Voltage Voltmeter.The gadget is often put through high voltage testing to ensure that it can function safely under the specified electrical conditions.

A voltage metre, usually referred to as a voltmeter, is a device that measures the voltage, or potential difference, between two points in an electrical or electronic circuit. While some voltmeters are made to work with circuits that use alternating current (AC), others are made to work with circuits that use direct current (DC).. Radio frequency (RF) voltage can be measured using specialised voltmeters.

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By adding the time of flight at the top of the cliff and the time taken down the hill, the ball spent 2.72 s of time in air.

A projectile can be a stone or a ball or any object that can be projected. The object projected will take a trajectory path.

Given that acceleration due to gravity is 9.8 m/s and a 0.87 kg projectile is fired into the air from the top of a 8.52 m cliff above a valley. Its initial velocity is 9.1 m/s at 49◦ above the horizontal. To know how long the projectile will be in the air, we will calculate the total time of flight at the top of the cliff and the time taken down the hill

Time of flight T = 2usinФ/g

Where

Substitute all the necessary parameters into the formula

T = (2 × 9.1sin49)/ 9.8

T = 13.74/9.8

T = 1.40 s

The time taken down the cliff can be found with formula

h = ut + 1/2gt²

where u = 0

8.52 = 0 + 1/2 × 9.8 × t²

8.52 = 4.9t²

t² = 8.52/4.9

t² = 1.738

t = √1.738

t = 1.32 s

Time for the projectile in the air = T + t

Time in air = 1.40 + 1.32

Time = 2.72 s

Therefore, the projectile will be in the air for 2.72 seconds long.

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The slope of the line connecting the points (9, -8) and (-9, -7) will be

- 0.056

x1 = 9

y1 = -8

x2 = -9

y2 =  -7

m =  ( y2 - y1 )  / ( x2 - x1 )

    =  -7 + 8 / -9 - 9

    =  1 / - 18 = - 0.056

The slope of the position vs. time graph will be  - 0.056

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There are two forces at play in a tug of war. The force produced by stretching the rope is indeed called tension. This power drives these people forward.

Another force acting on them is the friction of the soles of the feet. In tug-of-war, if two teams exert the same force on the rope, the net force on the rope is zero, so the rope stays in the same place. A rope has zero tension when both ends of the rope are pulled by two opposing forces of 100 N each. This is because both forces have the same magnitude but act in opposite directions on the same object and cancel each other out.

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Therefore, the tension in the string at its lowest point is equal to the weight added to the required centripetal force.

The rope tension is always directed towards the center of the circle. Below it means tension is UP and gravity is DOWN. At the top, downward gravity provides the necessary centripetal force. Therefore the voltage is 0. At the bottom, tension must provide the necessary centripetal force and balance gravity equal to mg downwards. Zero voltage is loose. Strings and ropes are often idealized as dimensions with length but no mass and zero cross-section.

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Glass, metal, rubber, bone, wood, stone, and plastic are a few of the more prevalent types of physical contaminants. Here is a closer examination of how some of those pollutants enter food goods.

Given the dire consequences if they don't, food manufacturers must take all reasonable precautions to prevent contamination and produce safe products. Physical, biological, chemical, and allergenic contamination of food are the four different types.

Food that has been contaminated biologically can be caused by human or animal waste, rodent droppings, pests, or microorganisms. This includes contamination caused by bacteria, viruses, or parasites that are spread through blood, feces, pest droppings, saliva, or other bodily fluids.

Chemical pollutants are substances hazardous to aquatic plants and animals.

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Answer: 10 meters

Explanation:

Gravitational potential energy equation= [tex]E_{G[/tex]=mgh

When we rearrange using Algebra we get [tex]h=\frac{E_{G} }{mg}[/tex]

Plugging everything in we get [tex]h=\frac{196J}{(9.80m/s^2)(2kg)}[/tex]

Final answer is 10 meters