What is the momentum of a tiger that has a mass of 81 kg and runs with a velocity of 5. 4 m/s to the east? (1 point)

The angle of refraction is a. 15°

Snell's law is described as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given colour and for the given team of media”.

By Snell's law:

η = sin i / sin r. i = 25, η = 1.6

1.6 = sin25° / sin r

sin r = sin25° / 1.6

= 0.4226/1.6= 0.2641

calculating

r = sin⁻¹( 0.2641 )

sin−1(0.264) is ≈ 15.3075

the angle of refraction is a. 15°

So the angle associated with the incidence and refraction can have a relation to the refractive index of the two mediums. Snell's First Law: It states that the incident ray, the refracted ray and the standard lie on the same plane.

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1333.3 is the frequency in the hertz of a signal that repeats 80,000 times within one minute. 0.00075 is its period.

The frequency of a repeated event is its number of instances per unit of time. In some cases, it is also referred to as temporal frequency or ordinary frequency to underline differences with spatial and angular frequencies, respectively.

The length of time it takes for a particle in a medium to complete one full vibrational cycle is the period of a wave. Being a time, a period is measured in time units like seconds, hours, days, or years. The Earth's orbit around the Sun has a duration of around 365 days, and one cycle of the Earth lasts 365 days.

frequency = cycle /second

frequency = 80000 / 60

frequency = 1333.3 hertz

Period = 1 / frequency

Period = 1 / 1,333.3

Period = 0.00075

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The pressure drop in pascal is 3.824*10^4 Pascals.

To find the answer, we need to know about the Poiseuille's formula.

                     [tex]Q=\frac{\pi r^4P}{8\beta l}[/tex]

                  [tex]P=3.284Pascals[/tex]

Thus, we can conclude that, the pressure drop in pascal is 3.824*10^4.

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Answer:

Explanation:

Formula

Electric Force formula

F = k * q1 * q2 / r^2

Gravitation Force Formula

F  = G * m1 * m2 / r^2

Givens

k = 8.99 * 10^9 N m^2/C^2

G = 6.67 * 10^-11  N m^2 /kg^2

Solutions

Fe = 8.99 * 10^9 * 1.6 * 10^-19 ^2/ 8.4 * 10^-11

The force = the electric force constant * the charge of the proton*charge  electron/ distance apart in meters. It looks small but actually it is quite large in comparison to the Gravitational Force

Fe = 3.2 * 10^-8 (Answer First Box)

Fg = 6.67 * 10^- 11 * 9.11*10^-31 * 1.67*10^-27 / 8.4 * 10^-11

The gravitational Force is very small. Just look at the powers which come to 10^-68 - -22 = - 46 which is about 6 times smaller than the electric force.

Fg = 1.44 * 10^-47 (Answer Second Box)

Answer:

We assume the second train was standing still and that momentum is conserved.

Then the product of mass and velocity before the collision is

(5000 kg)·(100 m/s) = 500,000 kg·m/s.

After the collision, where M is the mass of the second train, the momentum is

((5000+M) kg)·(50 m/s) = 500,000 kg·m/s

Dividing by 50 m/s and subtracting 5000 kg, we have

(5000 +M) kg = 10,000 kg

M kg = 5000 kg

The mass of the second train is 5000 kg

The magnitude and direction of the electrostatic torce is - 0.00712 x 10^9N towards left direction

Given:

q1 = +2 uC

q2 = -2 uC

q3 = +4 uC

To Find:

magnitude le and direction of the electrostatic torce

Solution: Electric force is a vector quantity. The electric force is proportional to the product of the magnitude of the charges. It is inversely proportional to the square of the distance between the charges. The electric force is calculated by,

F = kqQ/r^2

Force between q1 and q2

F1 = +2 x -2 x k/50 x 50 = - 0.0016k

Force between q1 and q3

F2 = +2 x +4 x k/100 x 100 = + 0.0008k

Net force on charge at origin is F1 + F2

F(net) = F1 + F2 = - 0.0016k + 0.0008k

F(net) = - 0.0008 x 8.9 x 10^9 = - 0.00712 x 10^9N

So, force on charge at origin is - 0.00712 x 10^9N and towards left direction

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Ice cubes float in a glass of iced tea because due to a lack of convection, ice cubes will cool more slowly if they are on the bottom. Ice is denser than water at 4° C.

Heat is transferred through convection, which is the large-scale movement of molecules inside gases and liquids. Conduction is used to move heat from the object to the fluid initially, but the fluid motion is responsible for the bulk of the heat transfer.

Natural convection is caused by the fact that most fluids have a tendency to expand when heated, which causes them to become less dense and rise due to the increased buoyancy. Heat is transferred between two bodies by currents of moving gas or fluid, which is known as convection. In free convection, air or water rises and is replaced by a cooler parcel of air or water as it moves away from the hot body.

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Lighter molecules move fast and escape from the upper atmosphere relatively quickly.

To find the answer, we have to know more about the lighter isotopes.

Thus, we can conclude that, lighter molecules move fast and escape from the upper atmosphere relatively quickly.

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The superconducting magnets are able to generate powerful magnetic fields because they have no electrical resistance.

To find the answer, we have to know more about the superconducting magnets.

Thus, we can conclude that, the superconducting magnets are able to generate powerful magnetic fields because they have no electrical resistance.

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The pressure of nitrogen which is needed to maintain a N2 concentration of 0. 53 m is 3.2 × 10^(4).

It is defined as the continuous physical force applied on or against an object by something which is in contact with it.

It is also defined as the force per unit area.

The henry law constant is thr ratio of the partial pressure of compound in air to the concentration of compound in water at given temperature.

C= kp

where,

C is the concentration of compound = 0.53m

k is the henry constant = 6. 2×10−4matm

p is the pressure of compound

By substituting all the value we get,

C = 6. 2×10−4 × p

0.53 = 6. 2×10−4 × p

p = 0.53/6. 2×10−4

p = 3.2 × 10^(4)

Thus we find that the pressure needed to maintain a N2 concentration of 0. 53 m is 3.2 × 10^(4).

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Answer:

F

Explanation:

When comparing two vector quantities you have to compare both magnitude and direction,but for scalar you only compare magnitude

❄ Hi there,

the answer is F, false.

∵

Vectors have both magnitude and direction, where:

magnitude = length of the arrow that represents the vector

direction = angle

∴ quantities that have only magnitude are not called vector quantities

❄

The pressure will 14. 0 g of co exert in a 3. 5 l container at 75°c is 4.1atm.

Therefore, option A is correct option.

Given,

Mass m = 14g

Volume= 3.5L

Temperature T= 75+273 = 348 K

Molar mass of CO = 28g/mol

Universal gas constant R= 0.082057L

Number of moles in 14 g of CO is

n= mass/ molar mass

= 14/28

= 0.5 mol

As we know that

PV= nRT

P × 3.5 = 0.5 × 0.082057 × 348

P × 3.5 = 14.277

P = 14.277/3.5

P = 4.0794 atm

P = 4.1 atm.

Thus we concluded that the pressure will 14. 0 g of co exert in a 3. 5 l container at 75°c is 4.1atm.

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An energy of 25kJ is given out hence the reaction is exothermic.

Chemical reaction is said to occur when reactants combine leading to the formation of products. In a plot of the energy against the reaction profile, the topmost point of the graph is called the activation energy.

We know that a reaction is exothermic when reactants posses more energy than the products. Hence the enthalpy change for this reaction is;

ΔH = 5kJ - 30kJ = -25kJ thus the reaction is an exothermic reaction.

Now, the activation energy for the lighting of the match stick is high that is why a spark is required before the reaction gets underway. Heat is evolved in the process hence the reaction is exothermic. The energy of the reactants is greater than the energy of the products.

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When current flow tries to decrease in an inductor, the magnetic field collapses and the voltage polarity across the inductor reverses

The associated magnetic flux also decreases, it then induces an e m f across the inductor, the sense of which is to assist the decreasing current.

Faraday's law of induction (to distinguish it from his laws of electrolysis), states that the magnitude of the emf induced in a circuit is proportional to the rate of change with time t of the magnetic flux Φ that cuts across the circuit:

emf = −dΦ/dt

Lenz's law, in electromagnetism, statement that an induced electric current flows in a direction such that the current opposes the change that induced it.

When the current flowing through the coil changes, the time-varying magnetic field induces an electromotive force (e.m.f) in the conductor, described by Faraday's law of induction.

According to Lenz's law, the induced voltage has a polarity (direction) which opposes the change in current that created it. As a result, inductors oppose any changes in current through them. Hence , polarity across the inductor got reversed

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When the wave speed increases the wave stay the same to get the same standing wave pattern

Standing wave are the combination of two waves moving in opposite directions . Amplitude of both the waves is same and frequency is also same . The phenomenon is the result of interference

Wavelength and frequency are inversely related to each other .

frequency = c / wavelength

so if one get  change then the other changes. As one get decrease other will increase and vise versa. . The speed of the wave depends on the medium. Change in the frequency of the wave changes its form to go into the next harmonic so the wavelength changes .Also in order to maintain the wave pattern the wavelength remain same

Hence , speed of wave will not affect the wavelength of wave.

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When the government intervenes in markets with external costs, it does so in order to protect the interests of bystanders. An externality is either an external cost or external benefit that spills over to bystanders.

Government can play a role in reducing negative externalities by taxing goods when their production generates spillover costs. This taxation effectively increases the cost of producing such goods. The higher cost, then, better reflects the true cost of production because it includes the spillover costs of, say, pollution.

So, such taxation attempts to make the producer pay for the full cost of production. The use of such a tax is called internalizing the externality. When the government intervenes in markets with external costs, it does so in order to: protect the interests of bystanders. An externality is either an external cost or external benefit that spills over to bystanders.

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The experiment's time period is unaffected by the change in amplitude in either experiment.

The time frame is provided by:

[tex]$T=2 \pi \sqrt{\frac{m}{k}}$[/tex]

where,

T = Time period.

M = mass.

k = spring constant.

We can see from the formula above that the only factors affecting the time period in a Simple Harmonic Motion (SHM) are the object's mass and spring constant. Any changes in the object's mass or the spring constant will cause the time period to adapt.

The attribute is known as a spring's "spring constant" describes the relationship between the force acting on a spring and the displacement it causes. In other terms, it describes the stiffness and size of a spring's range of motion.

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The distance between adjacent compressions or rarefactions is called the wavelength of the longitudinal waves.

To find the answer, we have to know more about the Longitudinal waves.

Thus, we can conclude that, the distance between adjacent compressions or rarefactions is called the wavelength of the longitudinal waves.

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We use the halfway mark as a point of comparison rather than at the point at which all the disks are floating because If the experiment were to be repeated, we would require a set of reference points.

The net rates of photosynthesis can be compared at the point where half the initial number of disks are floating. The time it takes for half of the disks to float reduces as the net rate of photosynthesis rises, showing an inverse relationship between the value and the net rate.

As photosynthesis develops, oxygen is delivered into the leaf's interior, changing the buoyancy and raising the disks. The rate at which the disks increase is an indirect indicator of the net rate of photosynthesis because cellular respiration, which uses oxygen, is occurring concurrently.

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There are three kinds of forces within the atom:

  i) Electromagnetic force of attraction between the electrons and protons

  ii) Electromagnetic force of repulsion between the protons or weak nuclear force

  iii) Strong nuclear force between the electrons and protons

The electromagnetic force of attraction:

Weak nuclear force:

Strong nuclear force:

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Answer:

1.)Electrons surrounding a nucleus are attracted to the protons within it because electrons and protons have opposite charges. Electrons closest to the nucleus are attracted with such a force that they can’t escape from the atom. These electrons tend to shield the protons from electrons that are farther away because electrons have the same charge and repel each other. Electrons that are farther away have less attraction to the protons within the nucleus and are more likely to be detached from the atom.

2.)Electrons can be transferred from atoms of one body to atoms of another body through friction. This can occur when one body is rubbed against another or when a liquid flows across a solid. In either case, one body may be given a positive charge while the other body is given a negative charge of the same magnitude. Both charges are developed at the same time. Electrons can also be transferred from one body to another when a charged body comes into contact with an uncharged body. The electrons move in the direction that will equalize the charges; thus, the uncharged body will be given the same charge as the charged body.

3.)Free electrons move from points of negative charge to points of positive charge. When these electrons move freely from one point to another with little resistance, the material they’re traveling through is said to be a conductor. Conductors have a large number of free electrons. Insulators, on the other hand, have very few free electrons and offer great resistance to the movement of these electrons. Electric charges produced on one end of a body composed of insulating materials will most likely not spread throughout the body. In a conductor, this charge would spread throughout the entire body. Metals are generally conductors; oils, rubber, air, porcelain, and plastics are good insulators.

4.)Lightning is produced by the rapid transfer of free electrons when one of the following conditions exist:

One part of a cloud is positively charged and a neighboring part of the same cloud is negatively charged.

A positively charged cloud comes near a negatively charged cloud.

A cloud with either a positive charge or a negative charge comes near the earth.

Explanation:

PENN FOSTER

the height of the building is H=36 m.

According to Newton's law of gravity, every particle of matter in the universe is attracted to every other particle with a force that varies directly as the product of their masses and inversely as their distance from one another.

Properties of Gravity -

Examples of Gravity -

v₀=0 m/s

H₀=0 m

g=10 m/s²

t=7,2 s

H - ?

[tex]H= H_{0} + v_{0}t+\frac{gt^{2} }{2} \\[/tex]

H = 0 +0 × 7.2 + 10(7.2)²/2

H = 36m

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The value of Q will be -8 C.

In the presence of an electric or magnetic field, matter experiences a force due to its electric charge.

A moving electric charge generates a magnetic field, and an electric charge has an accompanying electric field.

The information provided in the issue is;

The separation between and is 2m.

The separation between and is 2m.

An origin charge equals +2 C

The electric fields are identical in magnitude but are facing in different directions. As a result, the following relationship can be used

Q/16=1/2

The value of Q will be -8 C.

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Th value of q is= -8C

Here, To calculate the value of q we use the formula,

The E-field due to a point charge = [tex]\frac{k\times Q}{D^{2} }[/tex]

Here we are given,

D= the distance along the axes.

k= The coulomb's constant.

We have to find, the charge along the axes = Q

Now, we have to substitute the known values in that equation for the cases,

For the E-field at x=-2 to equal 0, the E-fields from both charges must be equal in magnitude and opposite in direction.

For the first case,  E from +2C charge = [tex]\frac{k\times Q}{D^{2} }[/tex] = [tex]\frac{k\times (+2C)}{2^{2} }[/tex]=[tex]\frac{k\times (+2C)}{4 }[/tex].

For the second case,  E from Q charge= [tex]\frac{-k\times Q}{D^{2} }[/tex]=[tex]\frac{-k\times Q}{(2+2)^{2} }[/tex]=[tex]\frac{-k\times Q}{16 }[/tex].

Now, Comparing the two cases we can find that,

[tex]\frac{k\times (+2C)}{4 }=\frac{-k\times (Q)}{16}[/tex]

Or,[tex]\frac{+2C}{4}= \frac{-Q}{16}[/tex]  (Eliminate k from both sides of the equation.)

Or,[tex]Q=-8C[/tex]

So, from the above calculation we can conclude that,

The value of q is -8C.

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It will now emit at a rate of 160 W.

the proportion of an emitter's energy to that of a blackbody, a perfect emitter with the same temperature, wavelength, and viewing circumstances. It ranges from 0 (for the optimum reflector) to 1 and has no dimensions (for a perfect emitter).

The ability to reliably measure temperature using an infrared temperature sensor or a thermal imaging camera depends critically on emissivity, which measures a material's capacity to radiate infrared energy from its surface.

The type of surface affects a surface's emissivity in addition to the material. A smooth and polished metal surface will have a low emissivity in contrast to a roughened and oxidized metal surface, which will have a high emissivity.

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Answer:

below

Explanation:

Ice melts, meaning it has a watery layer upon its surface. This allows things to be moving like they are on a liquid but it has the solidity of a solid. The thin metal of the ice skates also decrease the surface area meaning it exerts more force but in turn, it allows you to move faster and further reduces friction.

The density of the oil is 917kg/ m³.

An object is said to be naturally buoyant when ithas the tendency to float in a fluid.

from the law of floating when a body float in a liquid,the weight of the liquid displaced by its immersed part is equal to the total weight of body.

That is

weight (w)=upthrust (u)

w=u

therefore

u=Dvg

where, D= density of the ice

v= volume of ice

g= acceleration due to gravity

from the question

given:

 D  = 917kg/m {}^{3} [/tex]

v = 3.00cm {}^{3} [/tex]

g = 9.8m/s {}^{2} [/tex]

substitute these values in above equation

u = 917(3 \times 10 {}^{ - 6} )(9.8)[/tex]

u=0.027N

but,

upthrust= weight of oil displaced.And the ice will displaced an amount of oil,equal to its own weight.

therefore,

density of oil = u/gv = (0.027)/3 \times 10 {}^{ - 6)} (9.8)[/tex]

density of oil = 917kg/m {}^{3} [/tex]

hence the density of the oil is 917kg/m {}^{3} [/tex]

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The magnitude of the force is(F)= 0 N.

To calculate the force here we use the formula,

[tex]F= I \times L \times B \times sin\theta[/tex]

Here we are given,

I= The current passing through the wire = 0.60A.

L= The length of the wire= 2.0 m.

B= The magnetic field created by the wire= 0.50T.

[tex]\theta[/tex]= The angle that the wire makes after orientation= 0° (because its orientation is parallel).

We have to find the magnitude of the force = F

Now, we substitute the known values in the above equation,

[tex]F= I \times L \times B \times sin\theta[/tex]

Or, [tex]F= 0.60 \times 2.0 \times 0.50 \times sin (0)[/tex]

Or, F=0

Now from the above calculation we can conclude that, the magnitude of force is 0 N.

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The sample summary paragraph which discusses an experiment and the results based on the reason why some substances require larger additions before a color change was seen is given below:

If the substance has a weak base solution (pH=8) and you add phenolphthalein, for example, you would only see a pink color change if a lot of phenolphthalein because it is used for stronger bases.

Also, when phenolphthalein is added to acids and weak bases, they tend to have a colorless coloration.

However, if phenolphthalein is added to a strong base, there would be a color change that is noticeable and it would be changed to pink.

This refers to the compound that has the ability to remove a proton from a very weak acid.

Hence, we can see that a summary paragraph is given above based on the use of large addition of elements to some substances before there is a noticeable color change is mentioned above.

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The average velocity of the car in m/s for the first leg is 36.2 m/s and the average velocity (in m/s) for the total trip is 7 m/s

Speed is the distance travelled per time taken. The S.I unit is m/s. The average speed is the ratio of the total distance travelled to the to time taken. While velocity is the distance travelled in a specific direction per time taken

Given that a race car traveling northward on a straight, level track at a constant speed travels 0.760 km in 21.0 s. The return trip over the same track is made in 26.0 s.

(a) The average velocity of the car in m/s for the first leg of the run will be

Velocity = (0.760 x 1000)/ 21

Velocity = 760 / 21

Velocity = 36.2 m/s

(b) The average velocity (in m/s) for the total trip will be

36.2 - (0.760 x 1000)/ 26

36.2 - (760) / 26

36.2 - 29.2

7 m/s

Therefore, the average velocity of the car in m/s for the first leg is 36.2 m/s and the average velocity (in m/s) for the total trip is 7 m/s

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The star with apparent magnitude 2 is more brighter than 7.

To find the answer, we have to know about apparent magnitude.

Thus, we can conclude that, the star with apparent magnitude 2 is more brighter than 7.

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