Astronomers infer that the universe is expanding because distant galaxies all appear to?

Answer:

The difference between observations and inferences is observations uses one or more of your five senses to know or determine something. However, inferences are where you make an explanation for the observation. For example, you see steam rising off a coffee cup ( this is an observation). The coffee is hot ( this is an inference).

A robot at that distance sees the light flash at time = 2500sec

Given,

A robot sees the flash light from distance = 5 astronomical unit (AU)

A robot at that distance sees the light flash at time = ?

Solution,  

An Astronomical Unit can be defined as , the mean distance of the center of the Sun from the center of the Earth.

1 Astronomical Unit (AU) = 1.496 × 10¹¹m

Time for the light reach to the earth T = 8min 20 sec

speed of light c= 3 ×10¹¹m/s

T = distance/speed

Distance = 5AU

Speed = c

therefore ,

T time = 5 AU/C

AU/C=  5Time= 5 ( 8×60 + 20 )sec

Time = 2500 sec

A robot at that distance sees the light flash in 2500 seconds.

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C. When describing motion, a frame of reference is a system of reference points used to determine position and velocities of objects.

A frame of reference is an arbitrary set of axes with reference to which the position or motion of something is described or physical laws are formulated.

Frame of reference serves a valuable purpose, because it enables us to make more accurate measurement of our position, displacement, velocity and the total distance traveled.

Also, a frame of reference consists of an abstract coordinate system and the set of physical reference points that uniquely fix the coordinate system and take measurements within that frame.

In other words, it is a system or base, on which motion of an object is determined.

Thus, when describing motion, a frame of reference is a system of reference points used to determine position and velocities of objects.

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You could double the charge to 2Q in order to double the size of the field at P.

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Answer:

Mendeleev is generally given more credit than Meyer because his table was published first, and because of several key insights that he made regarding the table.

Explanation:

Inductor releases its stored energy before it is removed from the circuit.

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The change in velocity is 2m/s

Given ,

mass of baseball m = 0.5kg

force on baseball F = 10 N

Duration .i.e. time t = 0.1s

To find here change in velocity =?

Solution,

The impulse(J) of an object is equal to,

J = F× T

Where J is the impulse of the baseball and F is force on baseball at time t.

The impulse is equal to the change in momentum of the baseball and its unit is (N.s) Newton -second. it is a vector quantity therefore the dimension is [LMT⁻¹]. Then the impulse j is given as ,

J = m(v-u)

Here J is impulse ,m is mass, (v-u) is change in velocity .From equating the both impulse equations then can be write as,

m(v-u) = F× t

(v -u) =( F × t)/m

(v -u) = (10N× 0.1 s)/0.5k

(v -u) = 2m/s

Hence the change in velocity (v -u) of baseball is 2m/s.

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Answer:

The variance is 153.507 kg2 for a random sample of 10 subjects that have weights with a standard deviation of 12.3898 kg

Explanation:

Variance is a measure of variation. It is determined by averaging the squared deviations from the mean.

The degree of dispersion in your data collection is indicated by variation. The greater the spread of the data, the greater the variance in proportion to the mean.

The standard deviation is generated from variance and indicates how much each number deviates from the mean on average. The square of the standard deviation gives the formula for variance in this case.

S = σ2

where

s= variance

σ    = standard

s= 12.38982

s= 153.507 kg2

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1.22 x 10⁸ nm is the wavelength of radiation.

2.45 x 10⁹ = frequency(v)

3.00 x 10⁸ = speed of light(c)

(3.00 x 10⁸ m/s)/(2.45 x 10⁹ Hz)= 1.22 x 10⁸ nm

1.22 x 10⁸ nm is the wavelength of radiation.

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Switched Circuit: This type of connection only maintains a dedicated physical circuit or path between two network nodes for the duration of the connection before data may be transmitted.

A circuit in electronics is a complete circular channel via which electricity flows. A current source, conductors, and a load make up a straightforward circuit. The term circuit can be used in a broad sense to refer to any permanent path that energy, data or a signal can go through.

Circuits can be divided into three categories: series, parallel, and series-parallel. The typical configuration of a single electrical circuit includes one or more resistance or load devices.

The closed loop in which electricity can move is referred to as a circuit. Electricity can flow in a closed circuit without interruption from the power source through the conductor or wire to the load before returning to the ground or power source.

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If the members of a team are respectful and are able to get along with each other while supporting the ideas of each other, this is known as cohesion.

A team is composed of people that are working together to achieve a common goal. Thus the members of a team have one focus even though the methods that they apply at achieving the ends may differ tremendously.

Thus, if the members of a team are respectful and are able to get along with each other while supporting the ideas of each other, this is known as cohesion.

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Based on Einstein's theory of gravity, if the sun and its mass were to suddenly disappear, earth would stay in its current orbit for a few minutes before taking off into space.

The Earth would be drawn to a new center of gravity if the sun disappeared. Earth's gravity would change, as would that of the rest of the solar system, and Earth would begin to drift into space since there would no longer be a steady source of energy from the sun. It is a foolish dream to think that life could exist without the sun forever. Humans could be able to survive for a while in some sort of base, such as a nuclear-powered dome.

The good news is that there wouldn't be many living things for the radioactive waste to endanger; however, there also probably wouldn't be any liquid water to cool the power system. All photosynthetic species, including plants and algae, would die if just the sun's light persisted.

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The major difference is the cleavage of isocitrate by isocitrate lyase, resulting in succinate and glyoxylate, as opposed to the breakdown of isocitrate by isocitrate dehydrogenase.

A variant of the tricarboxylic acid cycle called the glyoxylate cycle is an anabolic mechanism that may be found in fungus, bacteria, protists, and plants. In order to synthesize carbohydrates, acetyl-CoA is converted to succinate in the glyoxylate cycle. When simple sugars like glucose or fructose are not available, the glyoxylate cycle in microorganisms enables cells to employ two carbons (C2 molecules) like as acetate to meet cellular carbon needs. Animals are often thought to lack the cycle, with the exception of nematodes during the early stages of embryogenesis.

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The ball to reach its highest point at time t =4.0816 sec

Given ,

A ball throw in upward from the ground ,its Initial velocity u = 40 m/s

The time taken by the ball to reach at its highest point t= ?

Solution,

 Therefore from equation of motion ,

v = u + gt

where,

v = final velocity

u = initial velocity

g = acceleration due to gravity

t = time

Here final velocity of ball is (0).& taking (g) is negative due to upward direction ,then calculated value of ( t )is given as,

(0) = 40 m/s- (9.8m/s²) t

(t) = 40/9.8 sec

(t) =4.0816 sec

Hence, the ball to reach its highest point at time t  is 4.0816 sec

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The vibrational frequency of a bond is measured in this spectroscopic method

To investigate the molecule level interaction, spectroscopic methods are used. In this regard, nuclear magnetic resonance is one method (NMR). NMR is utilised to analyse the interaction between mucus and polymers, and carbon and/or proton NMR can also elaborate this interaction.

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Answer:

1,226,666.6666 g/cm3

Explanation:

Density =Mass/Volume

=1.840 kg(×1000g) / 0.0015

=1,226,666.6666666 g /cm3

The type of tire which would have the least amount of friction on a road is a  bicycle tire and is denoted as option A.

This is referred to as the force which resists the relative motion of a solid surface against each other and is directly proportional to the area of contact.

This therefore means that the largest types of tires will have the most type of friction and in this scenario, it is the truck tire. However, the bicycle tire which is the smallest will have the least amount of friction on the road and is therefore the reason why option A was chosen as the most appropriate choice.

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The car slows down by acceleration - 10 m/s² before stopping.

Given data are:

Initially moving at 30 m/s

The car's final speed is 0 m/s as it comes to a halt.

t = 3.0 seconds.

Acceleration equals a.

using the equation v = u + at, we obtain

0 = 30 + 3t

a = - 10 m/s²

The vehicle suffers a - 10 m/s² slowdown as a result.

Acceleration is the general term for any process where the velocity changes. There are only two ways to accelerate: either by increasing speed or decreasing direction, or both. The reason for this is that velocity includes both a speed and a direction.

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According to the given statement the car slows down by acceleration - 10 m/s² before stopping.

Any procedure where the velocity varies is referred to as acceleration. There are only two ways to accelerate: either by accelerating faster, or by accelerating in the opposite direction. This is because velocity consists of both a speed and a direction.

v = initial velocity (20m/s)

u = final velocity (0 m/s)

t = 3.0 seconds.

Acceleration equals a.

Using the equation v = u + at, we obtain

30 = 0 + at

a = - 10 m/s²

The car's acceleration  is -10m/s².

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The unifying relationship among the variables temperature, volume, pressure, and the number of moles is described and summarized by the ideal gas law.

The equation for ideal gas law is given below where T is temperature, V is the volume, P is the pressure, n is the number of moles of the gas, and R is the gas constant 0.082056 L⋅atm/mol⋅K

PV = nRT

Calculate first the moles of O2 from the moles of Ag2O

moles O2 = 0.5 moles Ag2O x 1 mol O2/2 mol Ag2O = 0.25 moles

Assuming that the oxygen gas is an ideal gas, we will use the ideal gas equation to calculate the volume it occupies.

V = nRT/P

V = 0.25 moles*0.082056*546k/1 atm =

11 L

Hence, volume of pure oxygen gas (o2) is 11 L

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Measuring human proportions on skeletal remains from ancient sites as well as among modern human populations is known as: anthropometry

The anthropometry is the part of science that studies the proportions of the human body, using non-invasive methods such as the measurement of body mass, height and width.

By using anthropometry it is possible to assess the size, proportions and composition of the human body which gives a measure that reflects the nutritional state of health and allows predicting the performance, health and survival of the individual under analysis.

It is the amount of mass associated with a person's body

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18.45 % percent of the distribution falls between 400 and 500 feet.

Z score is a standard score that tells you how many standard deviations away from the mean an individual value X.

Mean value ,μ= 410 feet

Standard deviation, σ = 45 feet

X = square of an individual

In a set with mean value and standard deviation the z score of a measure X is given by:

 Z = (X - μ)/σ

percent of the distribution that falls between 400 and 500 feet

when

X = 400feet

Z = 400-410 / 45 = -0.22

p-value for Z= 400 is 0.4129

X = 500 feet

Z = 500- 410 / 45 = 2

p-value for Z = 500 is 0.2275

So there is 0.4129 - 0.2275 = 0.1854 = 18.45 %percent of the distribution falls between 400 and 500 feet.

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Uniform circular motion is an example of this question.

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Any substance or mixture of substances intended for the cure, mitigation, diagnosis, or prevention of disease is a drug.

The process of determining which disease or condition is to blame for a person's symptoms and signs is known as medical diagnosis. The term "diagnostic" is most frequently used, with the implied reference to medicine. The history and physical examination of the patient who is seeking medical attention often yield the data needed for diagnosis. The process frequently includes one or more diagnostic procedures as well, such doing medical testing. Posthumous diagnosis is occasionally seen as a type of medical diagnosis.

Due to the vague nature of many symptoms and indicators, diagnosis is frequently difficult. For instance, skin redness (erythema), when present alone, is a symptom of numerous illnesses and cannot be used to diagnose a patient's condition.

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Answer:

I need help ASAP to with this question

Explanation:

Please hurry up with assignment

C3H7Br would neutralize 78.2 ml of 2.549 m hydrobromic acid.

Hydrobromic acid, a powerful acid that is created by dissolving hydrogen bromides in water, is the end product.

Hydrobromic acid is a diatomic compound with the molecular symbol HBr. Hydrogen bromide is a colorless, suffocating gas that is extremely soluble and dissociated in water.

It quickly reeks when moist air is present. When encountered, hydrogen bromide gas, a very corrosive chemical, can cause severe burns.

Hydrobromic Acid’s Chemical Makeup – HBr

Sulfur dioxide, bromine, and water are produced when hydrobromic acid and sulfuric acid are combined. Below is the chemical equation.

Br2 + SO2 + 2H2O = 2HBr + H2SO4

2-Bromopropane is created when hydrobromic acid and propene undergo an addition process. Below is the chemical equation.

C3H6 + HBr = C3H7Br

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Majority carries electron concentration n₀=225 cm⁻³

At= 300k ni= 1.5×10¹⁶ cm⁻³

Given na= 10¹⁸ cm⁻³

as Na>>ni the hole concentration is,

P₀= Na= 10¹⁸ cm⁻³

Therefore majority carries of the hole concentration is

P°= 10¹⁸ cm⁻³

At equilibrium,

P₀n₀= ni²

n₀= ni²/P₀= (1.5×10¹⁰)²/10¹⁸= 225×cm⁻³

n₀= 225 cm⁻³

Majority carries electron concentration n₀=225 cm⁻³.

All that noise is interfering with my focus since concentration is defined as the act or process of concentrating as well as the state of being concentrate a focus within a major or a major itself The student decided to concentrate in law.

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According to Coulomb's law distance between the oppositely charged particles will have a greater effect on the force of attraction between them.

The force of attraction is more affected by distance. The electric force of attraction diminishes by 1/r2 as the distance between the charges grows. For instance, since the repulsive force is inverse, if the distance between the two electrons were to double, it would do so by a factor of 4 rather than 2. (because of the square).

To summarize, according to Coulomb's law, the force of attraction will have the greatest dependence on the distance between the two oppositely charged particles rather than growing with the quantity of charged particles.

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Given,

The magnitude of the resultant force is 39.7 N and makes an angle of 49.5° with the x-axis.

The two given forces are vectors, thus they have to be resolved horizontally and vertically to determine their resultant.

So that:

 Horizontal component = F Cos θ

  Vertical component = F Sin θ

Thus, given that: a = 28 lb at 45° on x & y axis, and b = 12 lb at 30° below x-axis.

i. Resolving the vector horizontally, we have:

horizontal component = 28 Cos 45° + 12 Cos 30°

                                    = 19.80 + 10.39

horizontal component, x  = 30.19

ii. Resolving the vectors vertically, we have:

vertical component = 28 Sin 45° + 12 Sin 30°

                               = 19.80 + 6.0

vertical component, y  = 25.80

a. Magnitude of the resultant force, |R| = [tex]\sqrt{x^{2} + y^{2} }[/tex]

= [tex]\sqrt{(30.19)^{2} +(25.80)^{2} }\\\\[/tex]

= 39.7124

|R|     = 39.7 Newtons

b. The angle that the resultant makes with the positive x-axis can be determined by:

[tex]Tan\ \theta = \frac{x}{y} \\\\\theta = Tan^{-1} \frac{30.19}{25.80} \\\\= 49.4832\\\\\theta = 49.5\textdegree[/tex]

Therefore, the magnitude of the resultant force is 39.7 N and makes an angle with the x-axis.

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Reflection is the process by which sound leaves its source and travels through a room's objects, walls, and ceiling before reaching a microphone or an eardrum.

The room's internal overhead lining The ceiling is very high. material used to cover a room's roof or walls. something akin to a towering canopy, an overhanging shelter, or a starry sky. Using a system of timber joists and beams that span the ceiling's length and width.

Ceilings assist in enclosing and dividing spaces, controlling the diffusion of light and sound inside a space, and preventing the transfer of sound across spaces.

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This is an example of regulatory environmental force.

A tanning bed is a place where the skin is darkened. The term tanning has to do with the process of the darkening of the skin. It could bee achieved naturally when a person is exposed to the ultraviolet radiation from the sun. As such, a person that has a white skin could make his/her skin dark by tanning.

Now, the proposed law in new jersey that would ban the use of tanning beds by anyone under the age of 18 is a restriction that  would be an example of regulatory environmental force.

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