A 900 kg car that exerts 5000 n of applied force on a level road while being opposed by 1000 n of friction. determine the acceleration of the car.

A string that is under 49.0 n of tension has linear density 4.70 g/m . a sinusoidal wave with amplitude 2.50 cm and wavelength 1.50 m travels along the string is Vmax = 10.675.

To find the maximum velocity, the given values are,

Density = 4.70 g/m

Amplitude = 2.50 cm

Wavelength = 1.50 m

Force = 49 N.

velocity of wave v = √t/μ

v = √49/√4.7 * 10^-3

= 102.1 m/s

w = 2 π f

   = 2 π (v/λ)

   = 2 π (102.1/1.5)

   = 427.04

Max speed Vmax = Aw

Vmax = 2.50 * 10^-2 *427.04

Vmax = 10.675

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Two rocket ships approach a space station at 80% of the speed of light. Each pilot observes the other ship approaching at 98% the speed of light.

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Answer:

Explanation:

The resolution of radio telescopes suffers greatly from the large wavelengths of the light they are observing. To improve the angular resolution, it can be done to a radio telescope by making its dish bigger.

If the diameter of the objective is large, the value of  Δθ will be small. This points out that the telescope will be having resolving power of better experience if it is large. Because for this reason in order to get a better resolution, a large diameter objective type should be occupied by a particular telescope.

The resolution of the telescope is unable to get better because to attempt better resolution, we need a telescope with a high-quality lens or mirror as well as the presence of a large aperture.

In general, resolving power is inversely proportional to the diameter of the particularly given object. So when the larger the diameter and the smaller the angle, then we get an advanced result of better angular resolution, and also the telescope having a large diameter contained mirror would be showing a better view of resolving power.

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Finding the common slope of the placement function for the term you're interested by will let you decide the common pace.

the absolute value of velocity is common pace, then again.

average pace and average pace are the same if the arrow constantly actions at a regular tremendous or bad speed. we will first pick out the places of high-quality and negative velocities.

Find the velocity equation first. It is y(derivatives: )'s

y'(t) = v(t) = [tex]66 - 3.72t[/tex]

Next, find the positive and negative values of this:

v(t) = 0 when t = [tex]66/3.72 = 17.74[/tex] seconds.

this means that v(t) is continually fine for all 3-time durations. As a result, all we want to do is calculate the average slope of y(t) during each period.

The average slope equation is made up of the slope between the beginning and finishing points = [tex][f(b) - f(a)]/(b-a)[/tex]:

Therefore, these are the calculations:

(i) vavg = [tex][y(2) - y(1)]/(2-1)[/tex]

(ii) vavg = [tex][y(1.5) - y(1))]/(1.5-1)[/tex]

(iii) vavg = [tex][y(1.1) - y(1)]/(1.1-1)[/tex]

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From this information, it can be determined that

acceleration of the shot = 56 m/s^2

stoppage time = 0.123s

stoppage path length = 1.37m

The average acceleration while being shot by definition

a = [tex]\frac{\frac{80}{3.6} }{0.4}[/tex] = 56 m/s^2

Assuming that there is a constant acceleration we can determine the path covered during his acceleration as

s = 1/2a (0.4s)^2 = 4.5m

then we can find the stoppage time as

t3 = [tex]\frac{\frac{80}{3.6} }{180}[/tex] = 0.123s

Then the stoppage path length is defined as

s3 = [tex]\frac{(80/3.6)^2}{2a}[/tex] = 1.37m

Then the path length of travel with constant velocity is

s2 = 56.64m -s1 - s2 = 50.77m

Then time of flight

t2 = [tex]\frac{s_{2} }{80/3.6}[/tex] = 2.28s

Then we can determine the total time of flight as

t = t1 + t2 + t3 = 2.8s

Thus, we have

ashot = 56m/s^2

tstop = 0.123s

[tex]\delta x[/tex]stop = 1.37m

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The percentage change of the mercury concentration is 89.2 %

We know that,

Percentage change = [ ( Final value - Initial value ) / Initial value ] * 100

Given that,

Initial value = 65 ppm

Final value = 7 ppm

Time = 10 years

Time is not necessary in a percentage calculation because no matter how it took for something to change only the changed quantity matters.

Percentage change = [ ( 7 - 65 ) / 65 ] * 100

                                 = 0.8923 * 100

Percentage change = 89.23 %

In a percentage change initial value is absolute as it cannot be changed.

Therefore, the percentage change of the mercury concentration in a ten year period is 89.2 %

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Juan's absolute threshold is probably lower than Sergei's.

The lowest level of a stimulus that an organism can perceive is known as an absolute threshold. This definition has its roots in psychophysics and neurology. In light of the signal detection theory, the absolute threshold has been redefined as the point at which a stimulus will be detected a specific percentage of the time (usually 50%).

Goals and expectations of the subject, cognitive processes, and the degree of stimulus adaptation are only a few of the numerous factors that could have an impact on the absolute threshold. An absolute threshold is the minimal stimulus intensity that can be identified and is frequently thought to occur at least 50% of the time. The adage, which applies to any stimuli, is extensively used in experimental neuroscience research.

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In thermodynamics, the internal energy is the quality or state function that characterizes a substance's energy when capillary effects and other external magnetic, electric, and other fields are not present.

The entire electricity of a closed machine is referred to as internal electricity (U) in chemistry and physics.

The device's kinetic power and capacity energy together make up the machine's inner energy. internal strain is a dimension of how a device's inner electricity shifts for the duration of growth or contraction at a certain temperature.

strain, whose SI unit is the pascal, has the equal dimensions because it. perfect gases' internal energy and enthalpy are best depending on temperature; neither volume nor stress play a position. Enthalpy is the overall heat content of a gadget, while internal strength is the whole strength contained in a gadget. the full of internal power and the end result of stress-quantity paintings is called enthalpy.

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Answer:

-3.33m/s^2

Explanation:

From the graph, we can read that the object between segments C and D changed its velocity from 10m/s to 0m/s over 3 seconds.

(0m/s - 10m/s) / 3s = -10 / 3 * m/s^2 = -3.3333... m/s^2

The experiment wouldn't exist if the hypothesis were not testable, because, as it says, the hypothesis is untestable. Thus, no experiment can be done, and the hypothesis will always be neither true nor untrue because of lack of evidence either way.

Answer:

ambt kaon✌️jhrhriekeieieieiei

Explanation:

iwuejejwiowksj

The final result comes out to be 1.25 x 10¹² molecules. of so₂ contained in this sample .

This problem requests SO₂ molecules at equilibrium in exchange for a chemical process at equilibrium and its pressure-based equilibrium constant. The final result comes out to be 1.25 x 1012 molecules.

[tex]K_{p}[/tex] = 1/([tex]PSO_{2}[/tex]×[tex]PO_{2}^{1/2}[/tex])

[tex]PSO_{2}[/tex] = [tex]9.17[/tex]×[tex]10^{-16} atm[/tex]

Thus, we obtain the mole fraction of SO2 as follows:

[tex]xSO_{2}[/tex] = [tex]4.37[/tex]×[tex]10^{-15}[/tex]

The moles of SO2 in the 475 moles of the gas mixture are calculated using this mole fraction, and the molecules are calculated using Avogadro's number.

molecules = 475 × [tex]4.37[/tex]×[tex]10^{-15}[/tex]×[tex]6.022[/tex]×[tex]10^{23}[/tex] = 1.25 x 10¹² molecules.

If they contain more than one, they may contain different atoms or the same atoms (for instance, an oxygen molecule has two oxygen atoms) (a water molecule has two hydrogen atoms and one oxygen atom). The number of atoms in biological compounds like DNA and proteins can reach thousands.

A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties.

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Reactants are substances that are present at the beginning of a chemical reaction.

Products are the substance(s) to the right of the arrow. A substance that remains after a chemical reaction is complete is known as a product.

Consider the balanced chemical equation:

2H₂O → 2H₂ + O₂

Hydrogen and oxygen are the reactants, and water is the product in the balanced equation.

The reactants and product symbols and formulae are known from the aforementioned equation.

One oxygen molecule and two hydrogen atoms unite to form two water molecules.

The ratio of reactant to product is 2 : 1 : 2.

The total mass of products is equal to the total mass of the reactants according to the law of conservation of mass.

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electric lines of pressure are the important thing idea that turned into employed to conquer the issue.

Use the truth that an electric field always extends outward from a fine price as a start line. The fact that the electrical traces of force continually factor toward the bad charge will later be useful. eventually, create the drawing based on the instances.

wonderful charge to bad charge is the route in which the electric strains of pressure are always oriented. because the electric discipline constantly factors from negative charge to superb charge, draw the photograph thus.

parent 1 is visible below:

The truth that the electric discipline traces always factor from wonderful to terrible charge is used to create the lines with out accounting for engaging in spheres. knowing that there is a accomplishing sphere between the plates allow you to draw the diagram.

determine 2 is seen below:

The drawing makes use of the conducting sphere this is sandwiched among the parallel plates.

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The magnitude of the source charge is indicated by the outward arrows. The greater the number of arrows, the greater its strength. This is because each arrow represents the electrical force exerted by the source. If we add up all the arrows present, the electric force will be even greater. The descending order of the answers is C > A > B > D.

Electric charge is a physical property of matter that imparts a force on charged matter when placed in an electromagnetic field. Charge can be positive or negative (typically carried by protons and electrons, respectively). Similar charges repel and dissimilar charges attract. An object with no net electric charge is said to be neutral. Early knowledge of how charged matter interacts, now called classical electrodynamics, is still accurate for problems that do not require consideration of quantum effects. Charge is a conserved property. The net charge of the isolated system (the amount of positive charge minus the amount of negative charge) does not change. It is denoted by Q.

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The length of the tube is 0.25 m.

Frequency is defined as the number of waves that pass through a point in a unit of time. Energy and frequency are directly proportional to each other. It means with an increase in energy, frequency also increases. The SI unit of frequency is hertz. Hertz is denoted by the symbol Hz.

The formula of frequency is,

[tex]frequency= \frac{1}{Time \: period} [/tex]

[tex]f = \frac{1}{T} [/tex]

Frequency of the tube = 250 Hz

Speed of the sound in the warm air = 350 m/s

The length of the tube is,

[tex]Frequency = \frac{Velocity}{Length}[/tex]

[tex]f = \frac{ V}{4L}[/tex]

[tex]L = \frac{ V}{4f}[/tex]

[tex]L = \frac{350}{4 \times 250} [/tex]

[tex]L = 0.25 \: m[/tex]

Therefore, the length of the tube is 0.25 m.

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Both the x and y components of A+B+C will individually be zero for the given vector.

In both mathematics and physics, the term "vector" is used informally to describe certain quantities (also known as "scalars") that cannot be described by a single number or by the constituent parts of some vector spaces. It is possible to add and scale both geometric vectors and tuples. These vector operations gave rise to the idea of a vector space, which is a set that is equipped with both a vector addition and a scalar multiplication and satisfies some axioms that generalize the key characteristics of operations on the aforementioned types of vectors. The terms Euclidean vector space and coordinate vector space are used to describe vector spaces constructed from geometric vectors and tuples, respectively.

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The thing i observe if  I hold a largest plastic shopping bag square between the light source and the wall is that since the plastic is Translucent, it  allow some measures of light to pass through it.  When light hits the translucent materials, since it is big and little thicker, only some of the light went through them.

As light travels through air as well as into a clear material (such as glass), it speed is altered, and light is said to be reflected and also refracted by the said glass

Note that  Light can pass through some kind of materials, such as glass, water, plastic that is clear and transparent materials.

Therefore, The thing i observe if  I hold a largest plastic shopping bag square between the light source and the wall is that since the plastic is Translucent, it  allow some measures of light to pass through it.  When light hits the translucent materials, since it is big and little thicker, only some of the light went through them.

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Despite life not being possible on earth upon the demise of our sun, there will always be somewhere in our universe where it is possible.

This statement is true.

Everything exists in the cosmos. It encompasses all of space as well as the matter and energy that it holds. Even time is a part of it, and you are obviously a part of it. Along with the other planets and their numerous moons, Earth and the Moon are all components of the cosmos.

In general, the universe can take one of three forms: a flat universe, a spherical or closed universe (positive curvature), or a hyperbolic or open universe (negative curvature).

The clichéd response is that since space and time were both formed at the big bang, which occurred approximately 14 billion years ago, there is nothing outside of the cosmos. Beyond the observable universe, which may be 90 billion light years vast, however, is where most of the universe exists.

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The homeowner has reported that sometimes the electric furnace trips the 240-V, 60-A circuit breaker connected to it. Upon examination, it is found that the furnace contains three 5000-W heating elements designed to turn on in stages.

The power rating of the circuit breaker = volt x current

= 240 x 60

= 14400 W

So, we have 3 units of 5000W each.

When the first unit is turned on, the consumption is 5000W and the circuit breaker does not trip. When two of the 5000W units are turned on, it adds up to a consumption of 10000W.

The circuit breaker is still intact. But when the 3rd 5000W unit is turned on, the consumption reached to 15,000W which is greater than the 14,400W mark, and thus the circuit breaker trips off.

So, switching on all three units at once can cause the circuit breaker to trip off.

So, the recommendation would be that at a particular time maximum of two units can be turned on.

Even such, the two units cannot be turned on in series or they won’t receive 240 V each.

Another recommendation would be to use a circuit breaker of a higher power rating, more than 15,000W so that there will be no tripping.

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The electric field of the sphere at r=4r is 34.38 N / C

We know that,

E = kQ / [tex]r^{2}[/tex]

p = Q / V

where,

E = Magnitude of Electric field

k = Coulomb's constant

r = Radius

p = Charge density

Q = Electric Charge

V = Volume

Given that,

[tex]E_{2r}[/tex] = 1100 N/C

k = 8.99 x 109 N [tex]m^{2}[/tex]/[tex]C^{2}[/tex].

V = 4 / 3 π [tex]r^{3}[/tex]

Let us consider a charge of Q uniformly distributed throughout the sphere.

p = Q / [ ( 4 / 3 ) π [tex]r^{3}[/tex] ]

Let the charge at 2r be considered as q

At 2r,

q = p * ( 4 / 3 ) π [tex](2r)^{3}[/tex]

q = Q / [ ( 4 / 3 ) π [tex]r^{3}[/tex] ] * ( 4 / 3 ) π 8 [tex]r^{3}[/tex]

q = 8Q

[tex]E_{2r}[/tex] = ( k * 8Q ) / [tex](2r)^{2}[/tex]

1100 = 2 ( kQ / [tex]r^{2}[/tex] )

kQ / [tex]r^{2}[/tex] = 550

[tex]E_{4r}[/tex] = kQ / [tex](4r)^{2}[/tex] = 550 / 16

[tex]E_{4r}[/tex] = 34.38 N / C

The magnitude of electric field is the strength of electric field. If the charge is higher the electric field is stronger. It is denoted using E.

Therefore, the electric field of the sphere at r=4r is 34.38 N / C

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The correct answer is option B: there is a decrease in the speed of the emitted electrons.

If we increase the wavelength of the light and determine that electrons are still being emitted. The true statement is that there is a decrease in the speed of the emitted electrons.

The relation between wavelength and the energy of a light photon is given by the following equation;

E = hc / λ

Here 'E' represents the energy of light photons, h is the plank's constant, and c is the light speed where λ  is the wavelength of the light.

From the equation, we can see that the energy of photon and wavelength have an inverse relationship with each other.

So, as the wavelength increases, the value of energy decreases.

If the energy decreases then the speed and K.E of the emitted electron also decrease.

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Answer:

it will stop after some time

The term "deflagration to detonation transition" (DDT) describes a phenomenon that occurs in combustible gas and air (or oxygen) combinations when a quick change occurs from a deflagration type of combustion to a detonation type of explosion.

The general process by which a subsonic combustion wave (deflagration or flame) transforms into a supersonic combustion wave is known as the deflagration-to-detonation transition (detonation). Explosives are chemicals that contain a sufficient amount of oxygen within their molecules. When they are started, they could detonate disastrously or burn furiously, sending shock waves (detonate). Primary explosives are those high explosives that are extremely sensitive to heat, shock, or friction and are the main component of blasting caps or primers that set off other explosives.

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The net magnetic force is 31.4×[tex]10^{-5}[/tex] T.

Data;

a = 1.0cm

b = 3.0cm

i = 30a

B = ?

The magnetic field at point 2 will be

[tex]B_{2}[/tex] = (μI/4[tex]\pi[/tex][tex]R^{2}[/tex]) ×Ф

[tex]B_{2}[/tex] = [tex]47.1[/tex]×[tex]10^{-5}[/tex] T

The magnetic field due at point 4 will be

[tex]B_{4}[/tex] = (μI/4[tex]\pi[/tex][tex]R^{2}[/tex]) ×Ф

[tex]B_{4}[/tex] = [tex]15.7[/tex]×[tex]10^{-5}[/tex] T

The direction of magnetic field due to 2 and 4 are in the opposite direction.

The Net magnetic force is

B =  [tex]47.1[/tex]×[tex]10^{-5}[/tex] - [tex]15.7[/tex]×[tex]10^{-5}[/tex]

B = 31.4×[tex]10^{-5}[/tex] T

One of the four fundamental forces of nature, the electromagnetic force, results in the magnetic force, which is brought about by the motion of charges. When two charge-containing objects move in the same direction, a magnetic attraction pulls them together.

A magnetic field, a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. When a charge moves through a magnetic field, a force that is perpendicular to both its own velocity and the magnetic field operates on it. A permanent magnet's magnetic field pulls on ferromagnetic materials like iron and draws or repels other magnets.

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a proton is located at 3 ✕ 10−10, −2 ✕ 10−10, −3 ✕ 10−10 m.

The vector from the origin to the location of the proton-2 x1000 1165x1000

Proton located at 6x100 5x100 - 2x 1070 Dileetar from Origins to location of Protors

= (67+-59-2 Ê ) x100 :

(69-59-2K) x1000 (6x1000) /_ (5x1010) 9 -(2x1599)

2 Magnitude of t, 11-16x1600) + (-5x1000) of (-2x1000)

136+25+4 x colo

3 unit vector, î = = 61-55-2 x1000 1165x1000

What is Proton ?

Protons and neutrons are composed of two types: up quarks and down quarks. Each up quark has a charge of +2/3. Each down quark has a charge of -1/3. The sum of the charges of quarks that make up a nuclear particle determines its electrical charge.

A proton is one in every of three foremost debris that make up the atom. Protons are found inside the nucleus of the atom. this is a tiny, dense region on the center of the atom. Protons have a high-quality electric price of one (+1) and a mass of 1 atomic mass unit (amu), which is set 1.sixty seven×10−27 kilograms.

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4 time constants must elapse if an initially charged capacitor is to discharge 55% of its stored energy through a resistor.

What do you understand by the term capacitor?

What is a capacitor used for?

How many types of capacitors are there?

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If diseases can be detected with the samples of serial dilution means that both patients have the disease. But, the second patient has the disease at a higher level than the first patient.

ELISA test stands for enzyme-linked immunosorbent assay test. This test is performed to detect the amount and the type of antibodies for a disease present in your blood. ELISA test may be performed to diagnose the diseases like syphilis, HIV, Lyme disease, rotavirus, zika virus, etc.

Serial dilution is a process of performing dilution of a sample in a series to know the number of organisms present in that sample. In a dilution of 1:5, the concentration is lesser than the 1/100 dilution, it is more likely to provide lesser numbers of pathogen colonies.

In 1/5 dilution, a total of 5 parts comprise 1 part of the sample as solute and 4 parts of the diluent or solvent. While, in a dilution of 1/100, a total of 100 parts comprises 1 part of solute and 99 parts of solvent. 1/100 would provide a large number of disease-causing organisms in the sample.

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