The length between two given vectors is called what?
explain please
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Answer: 11.76 hours

Explanation:

I have attached an image explaining the answer

The event that will happen will depend on the mass of the spheres and will result in one of the spheres being attracted to the other by gravity  into its gravitational field.

Gravity is a force which causes mutual attraction between all objects that possess mass or energy.

Examples of gravity include:

Gravity is one of the four fundamental forces present in the universe.

Gravity is important in several ways such as:

The suddenly appearance of an identical sphere 1 trillion kilometers away from the original sphere in the universe will cause the spheres to attract each other into their gravitational field with a force that depends on the mass of the spheres.

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238820.22 calories of heat are produced in the stopping process if the car mass is 1000 kg.

We need to understand the concept of heat, the SI unit of heat, and what a calorie is in order to answer this problem. Most of us use the word "heat" to describe anything that feels warm, but according to science, heat is the movement of energy from a warm object to a cooler one. Based on this, heat is divided into two categories: hot and cold. Icebergs, volcanoes, and even human bodies contain heat energy.

v = 100 mph

v = 100 mph = 44.704 m/s

Energy = [tex]1/2m(v_f^2- v^2)[/tex]

The heat generated = [tex]1/2 \times1000\times 44.704^2[/tex]

H= 999223.828 J

H= 238820.22 Calorie

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The crest of an ocean wave moves a distance of given time is 2 m/s.

To know the speed of the wave,

Use the formula,

speed = distance / time

Given,

distance = 20 m

time = 10s

s = ?

Putting values,

s = d / t

s = 20 / 10

s = 2 m/s

Although some individuals may believe that average speed and average velocity are simply two different names for the same quantity, average speed depends on both distance and displacement. The average speed will be greater than the average velocity if an object changes direction while traveling.

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Light with a frequency of 7.30 x 10¹⁴ that lies in the violet region of the visible spectrum has a wavelength of 412nm.

The wavelength of light can be defined as the distance between two successive crests, or troughs of a wave of light, usually denoted by the Greek letter, lambda (λ).

Wavelength is directly proportional to frequency. This means that the shorter the wavelength, the higher the frequency. To find the wavelength of any electromagnetic wave if we are given the frequency, we use the following formular:

                    λ = [tex]\frac{v}{f}[/tex]

Where;

The velocity or speed of light is the same for all electromagnetic waves which is 3 x 10⁸m/s. We are already given the frequency in the question as 7.30 x 10¹⁴hz. Putting these values into the formular:

                      λ = 3 x 10⁸/7.30 x 10¹⁴

                      λ = 4.12 x 10⁻⁷m

However, to convert the wavelength from meter to nanometer, we would have to multiply the answer by 10⁹. Therefore;

                  λ = 4.12 x 10⁻⁷m x 10⁹ = 412nm

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The minimum horizontal velocity must the cliff divers leave the top of the cliff if they miss the rock would be 2.86 m/s.

It is the rate of change of an object's position with regard to time and a frame of reference. Although it may appear sophisticated, velocity is just the act of moving quickly in one direction. Since it is a vector quantity, the definition of velocity requires both magnitude (speed) and direction.

SI unit of velocity is m/s.

Velocity= displacement/ time

There are different types of velocity :

According to the question :

h=[tex]V_o[/tex]×t +0.5(g)(t²)

=0+0.5(9.8)(t²)

⇒4.9 t²=33.7

⇒ t²=6.89

so, t=2.62 seconds

d=v×t=7.51 m

⇒2.62 V=7.51 m

V=7.51/2.62

V=2.86 m/s

Hence, the minimum velocity must be 2.86 m/s.

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The symbol of the element oxygen is O, its proton number is 8, its atomic mass is 16, its neutron number is 8 and finally; oxygen belong to period 2 of the periodic table.

That being said, every atom of an element has within its nucleus; proton and neutrons of which electrons revolve round it. In the case of oxygen, it has

Oxygen, because it belongs to group vi and period 2 of the periodic table has a valence electrons of 6 electrons. This means that oxygen is a non metals.

An element can simply be defined as a chemical substance which which cannot be split into simpler units by ordinary means

An atom is the smallest part of element which can take part in a chemical reaction. Oxygen is a diatomic element which means that it exist in its molecules consisting of two atoms.

Below are the names of some elements:

So therefore, the symbol of the element oxygen is O, its proton number is 8, its atomic mass is 16, its neutron number is 8 and finally; oxygen belong to period 2 of the periodic table.

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Answer:

yes it's the right answer...............

In the competitive forces model, the central element that the other four elements contribute directly to strength is rivalry among established firms in the industry.

The Competitive Forces Model is an essential technique in strategic analysis for analyzing an industry's competitiveness. The concept is most widely known as Porter's Five Forces Model. It consists of the following five forces: rivalry intensity, threat of possible new entrants, buyer negotiating strength, supplier bargaining power, and threat of alternative products and/or services. Among all the five forces, rivalry among established firms contributes to strength.

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The acceleration's direction is always mirrored by the net force.

Given that a sailboat is moving across the water at a constant speed, we must determine the direction of the fourth point on the board.

As a result, we can claim that the investigation of bowties judo has been granted that bowties are moving at a constant speed.

In light of Newton's second law, the net force exerted on the boat is thus negligible since it equals mass times acceleration, and since acceleration is zero.

As a result of the velocity limitations, the solution is equal to this rate of change in velocity.

Execution is 0 for now. So that we can understand their responsibilities. There was no fourth act aboard the boat.

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The total pressure is 0.89 atm of the flask containing a mixture at 15° C

The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.

IT is defined as the amount of force exerted per area , so to make a large amount of pressure one can exert a large force or exert a small force for smaller area  , it's S.I unit is pascal

total pressure = sum of all the partial pressure

So total pressure (Ptotal ) = partial pressure of N2 + partial pressure of He + partial pressure of Ne

= (0.32 + 0.15 + 0.42) atm.

= 0.89 atm

So Ptotal = 0.89 atm.

the question is a bit incorrect,

the temperate of the flask is actually 158° C.

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The metal sample with a density of 1.56 g/l and a volume of 250ml , has a mass of: b) 0.39 grams

The density formula and the procedure we will use is:

ρ = m/v

Where:

Information about the problem:

Converting the volume unit from mL to L, we have:

250 mL * (1 L / 1000 mL) = 0.25 L

Applying the density formula and clearing the mass (m), we get:

m = ρ * v

m = 1.56 g/L* 0.25 L

m = 0.39 g

Although part of your question is missing, you might be referring to these group of answer choices: a)6.24 grams; b)0.39 grams; c)0.16grams; d) 0.59 grams

It is a physical quantity that expresses the ratio of the body mass to the bit occupies.

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Because Newton could not provide comprehensive proof, his Binomial Theorem is not a "theorem" in the sense of Euclid or Archimedes. Nonetheless, his knowledge and intuition served him well enough for him to construct a useful formula.

Furthermore, his intrinsic conviction in the persistence of patterns led him to believe that the formula that correctly generated coefficients for binomial powers such as (a+b)^2 or (a+b)^3 should also work for powers such as (a+b)^1/2 or (a+b)^−3.

Although Newton did not establish this finding, we do know how he came to it. Newton's explanation is offered in a pair of letters dated 1676 and delivered to Leibniz by Henry Oldenburg of the Royal Society. In it, he describes how he came to his conclusion in a roundabout way.

He was looking at the areas under the curves y=(1−x2)n2  from 0 to x for n=0, 1, 2, 3,.... These are simple to compute for even n. Newton was able to guess the solution for odd values of n by studying patterns and interpolating. Then he recognized that expressing (1−x2)n2 as an infinite series would provide the same results.

Newton wrote :

(P+PQ)mn=Pmn+mnAQ+m−n2nBQ+m−2n3nCQ+…

where P+PQ is the binomial to be considered; mn is the power to which the binomial will be raised "whether that power is integral or (so to speak) fractional, positive or negative"; and A,B,C,... indicate the term immediately preceding it in the expansion.

When compared to the present version, this may appear strange. When you remove the Pmn word from the right side and cancel, you get the more known form:

(1+Q)mn=1+mnQ+(m/n)(m/n−1)2Q2+(m/n)(m/n−1)(m/n−2)2×3Q3+(m/n)(m/n−1)(m/n−2)(m/n−3)2×3×4Q4+…

Thus, in Newton's notation,

A=Pmn

B=mnAQ=mnPmnQ

C=(m−n)2nBQ=(m−n)m(2n)nPmnQ2=(m/n)(m/n−1)2PmnQ^2

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Answer:

a

Explanation:

vector is size and direction

hope this works :)

The modulus of elasticity of normal weight concrete is 9400 ksi.

The modulus of elasticity is the measure of the stiffness of a substance. It measures the resistance of an object to being deformed.

Generally, the objects with higher values of modulus of elasticity are stronger and therefore preferred to be used as a building material for construction purposes.

The relation between the compressive strength(C) of a substance and its modulus of elasticity(E) is given by the following formula;

E = 4700√C ksi

We are given that the compressive strength of normal weight concrete is 4 ksi,

Therefore, E = 4700 √4

E = 9400 ksi

Thus, the modulus of elasticity of normal weight concrete is 9400 ksi.

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The final magnification will be 100X.

The light compound microscope contains two lenses to assist viewing of small objects. The two lenses are ocular lens and objective lens. Ocular lens is in the eyepiece and magnifies the image. Objective lens is near the sample and magnifies the object. Ocular lens is always 10X. Now, if we use objective lens of 10X, the magnification will be calculated by multiplication. So, the final magnification of the microscope will be 100X.

Compound microscope is commonly used to view the samples in magnification ranging from 40X to 1000X. There are variety of microscopes that provide detailed and highly magnified images, for instance, fluorescence microscope, digital microscope, electron microscope etc.

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She has travelled a total of 1300 metres away from the starting point if she travels 1200 metres north and 500 metres due east.

We can determine the total distance travelled by a body with position function s (t) when it moves along a coordinate line without changing direction from t = a to t = b.

We must incorporate the body’s speed |v (t)| to determine the overall distance travelled if the body changes direction once or more during the journey.

Metre

The metre [m] is the SI unit of length and displacement.

Let A is the initial position of the hiker.

After walking 1200 metres north reached point B, after walking 500 metres east due to B. She reached point C.

Total distance travelled = 1200 + 500

= 1700

The distance from strating point is AC from triangle ABC

AC^2 = AB^2 + BC^2

AC^2 =(1200)^2 + (500)^2

= 1440000 + 250000

= 1690000

AC^2 = 1690000

AC= [tex]\sqrt{1690000}[/tex]

⇒ AC = 1300 m

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Answer:

Animals that use the position of the sun to navigate need an internal 'clock' to keep track of time because the position of the sun changes throughout the day. By knowing what time it is, these animals can accurately determine their location and find their way back to their home. Examples of animals that use the sun to navigate include bees and migratory birds.

What is an internal clock?

An internal clock is a physiological mechanism that tracks the passage of time. It is found in most animals and is responsible for regulating the daily activities of the organism, such as feeding, mating, and sleeping.

Explanation:

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The proportion of total mass of Earth lost every year is 6 x 10²⁰ kg.

Heisenberg's uncertainty principle states that it is impossible to measure the exact position and the momentum of an object at the same time, or energy and time. The more certain one is variable is, the more uncertain the other variable is.

The more accurate we measure position of the object, the more uncertain the momentum of the object becomes.

The uncertainty in the measurement of the mass of the Earth can be assumed to be (1 x 10⁻² %).

The proportion of the mass mass of Earth lost every year is calculated as follows;

m = (0.01/100) x 6 x 10²⁴ kg

m = 6 x 10²⁰ kg

Thus, the proportion of total mass of Earth lost every year is 6 x 10²⁰ kg.

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The critical angle for this interface is closest is 45.6 degrees.

The refractive index is the velocity or the speed of the light through which the ratio is calculated by comparing that velocity to be present in the vacuum by its velocity in any specified medium which can be water or air and this medium is also called secondary medium and this medium should be greater density than the former one. The refractive index is represented by the letter 'n' and the value of the refractive index for air is 1.0003 and in the case of liquid the refractive index values can range from 1.0010 to 1.0060 and the formula for the refractive index calculation is n = c/v where n is the refractive index, c is the velocity or speed of light and v is the phase velocity of light that means when light is some other phase like liquid or air or refractive index can also be defined as the bending of the light when the light passes from one medium to other of different densities.

Given -

The Refractive index of crown glass is = 1.52

The Refractive index of water is = 1.33

The angle of incidence = 40°

To calculate the angle of refraction in water -

Using Snell's law

[tex]n_1 sin \theta i = n_2 sin \theta r[/tex]

[tex]n_1 / n_2 = sin \theta r/sin \theta i[/tex]

Where,

[tex]n_1[/tex] = Refractive index of crown glass

[tex]n_2[/tex] = Refractive index of water

[tex]\theta[/tex] i = incidence angle

Putting the value we will get

1.52 /1.33 = sin [tex]\theta[/tex]r / 40

sin [tex]\theta[/tex]r = sin 40 [tex]\times[/tex] 1.52 / 1.33

sin [tex]\theta[/tex] r = 0.715

So, theta r will be

[tex]sin^{-1}[/tex] ( 0.715 ) = 45.6 degrees.

Hence the correct answer is 45.6 degrees of the critical angle.

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The mass of a 100.0 cm3 chunk of this steel is  810 grams.

What is Density?

A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol, however Latin letter D may also be used. Density is mathematically defined as mass divided by volume.

Density = Mass/ volume

Mass = density x volume

Mass at 100 cm3 = density x volume x 100 cm3

Mass at 100 cm3 = 8.1 g/cm x 100 cm 3

Mass at 100 cm3 = 810 grams

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The length of one sheet of the standard sheet of printer paper in terms of centimeters is 27.94

As we are given that,  the standard sheet of printer  paper is 8.5  inches wide and 11 inches long,The calculation for this problem is just two-step,

So, we know that 1 inch is equal to  2.54 centimeters.

So, the width of the paper in terms of centimeters will be 8.5 X 2.54 =21.54 cm and the length of the paper in terms of centimeters will be   11 x 2.54 =  27.94 cm

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The probability of five tails turning up in seven flips is 16.4%

In reality, if one concentrates on one possible outcome, referring to it as success and all other outcomes as a failure, one can say that an experiment with three or more possible outcomes is a binomial experiment.

When researching the decay of a kaon in elementary particle physics, for instance ( K particle).

Binomial random variables are produced by binomial experiments, and they will be the subject of our next couple of lessons.

A very particular kind of experiment is a binomial experiment. Four requirements must be satisfied for an experiment to be considered a binomial experiment:

A specific number of trials must be conducted. Because the number of rolls (trials) is not fixed, the experiment cannot simply consist of rolling a die until you get a 2.

Every trial must stand alone from the others.

A rule like "If you flip a coin and get heads, flip it twice more, and if you get tails, flip it three times more" is not acceptable.

There must be a "success" and a "failure" in every trial. These may vary depending on the trial.

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Answer:

16fl = 90 kacl because 8 fl double = 16 fl so 45 kcal = 90 kcal (double )

a) The shoppers who walked from the car to the door in 20 minutes walked for 1200 seconds.

b) The shoppers' walking speed in meters per second is 0.67m/s.

A) In the question, we are already given how long it took for the shoppers to walk from their car to the entrance of the shopping mall, although it's in minutes. We are told that it took them 20 minutes to walk from their car to the entrance. In order to know how long they were walking in seconds, we would have to multiply by 60. This is because there are 60 seconds in one minute. Hence, to find the number of seconds in 20 minutes, we multiply 20 minutes by 60 seconds, thus;

                     20 minutes × 60 seconds = 1200 seconds.

B) Now that we know how long the shoppers were walking in seconds, we can use it to get their walking speed. To find the speed of any moving object, we divide the distance the object travelled by the time taken for the object to cross that distance in seconds. In the question, we are told that the shoppers parked their car 800 meters away from the entrance. This means that the distance they walked to get to the entrance is also 800 meters. Thus to find their walking speed;

                               Speed = distance ÷ time

                               Speed = 800 meters ÷ 1200 seconds

                              Speed = 0.67 m/s.

Therefore, the shoppers walked for 1200 seconds at 0.67m/s.

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An electric pencil sharpener is a small motorized appliance for sharpening or refreshing the points on lead pencils.

An electric pencil sharpener is a small motorized equipment for polishing or fresh the factors on lead pencils. Within the hollow, a small electric powered motor turns a blade meeting at high velocity. The blades shave wooden and lead from the pencil's cease, bringing it to some extent.

The old-fashioned pencil sharpeners which are established to the wall and cranked through a manage are an instance of a compound system that is composed  simple machines: the wheel and axle and a wedge.

You could sharpen colored pencils in an electric sharpener, however make certain to be very mild with your pencils and often easy your sharpener to put off any wax increase. If performed improperly, sharpening your colored pencils in an electric sharpener can harm each your pencils and your sharpener.

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The net change in the internal energy is 40joules.

Given here, the force (F) = 800N acting over a distance of (D) = 0.05m(1cm = 0.01m)

First, we calculate work done by the formula,

Work done = Force × displacement

Work done = 800× 0.05

= 40joules.

Now, we calculate internal energy the first law of thermodynamics.

Internal Enegy (dE) =dQ + W

dE= 0+40

dE = 40joules.

Thus, internal energy was found to be +40joules.

Adiabatic process is a kind of thermodynamic process that takes place without the thermodynamic system or its surroundings exchanging heat or matter, in simple words it is defined as the system where no heat loss Or gained by the system.

An adiabatic process only transfers energy to the environment as work, as contrast to an isothermal process. The adiabatic process is a fundamental idea in thermodynamics and supports the law behind the first law of thermodynamics.

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