A cosmic catastrophic event occurred that caused the tilt of the Earth's axis relative to its plane of orbit to increase from 23.5 degrees to 90 degrees. The most obvious effect of this change would be

Answer:

the answer will be c

car p has twice the kinetic energy of car Q

Explanation:

P =F * v

F = m * a = 65 kg * 9.81 ms^-2 * 12 passengers

v = d/t = 150m / 64 s

I think you can calculate and substitute this units should be watts

The power needed to transport the passengers through this height is 17.933 KW or 17933 Watts.

Power can be defined as the rate at which work is done by an object. Power can be calculated by the formula:

P = W × t

where, P = power, w = work done, and t = time taken.

The SI unit for power is the watt (W), where 1 watt power is equal to 1 joule/second (1W = 1J/s). Because, the work done by an object is the energy transfer by the object, and power is also the rate at which energy is expended.

P = F × v

where, P = Power, F = Force, and V = velocity of the object

F = m × a = 65 kg × 9.81 ms⁻² × 12 passengers = 7651.8

v = d/t = 150m / 64 s = 2.343

P = 7651.8 × 2.343

P = 17,933.90

P = 17.933 KW

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Answer:

See Explanation

Explanation:

According to Newton's second law of motion, the acceleration of a body is proportional to the net external force that acts on the body.

A body accelerated when it is acted upon by an unbalanced net external force.

When the external forces acting on a body are balanced, the effect of each force is cancelled by the other hence the body is not accelerated according to Newton's second law.

Answer:

Acceleration = 2 m/s²

Explanation:

Given the following data;

Mass = 100 kg

Force = 200 N

To find the acceleration of Bronco's fall;

Mathematically, force is given by the formula;

Force = mass * acceleration

Substituting into the formula, we have;

200 = 100 * acceleration

Acceleration = 200/100

Acceleration = 2 m/s²

Therefore, the acceleration of his fall is 2 meters per seconds square.

Answer:

T = 486.6 K

Explanation:

The final temperature of the block can be found using the following formula:

[tex]Q = mC\Delta T\\[/tex]

where,

Q = Thermal Energy Transferred = 3.35 x 10⁵ J

m = mass of aluminum block = 2 kg

C = Specific Heat = 897 J/kg.K

ΔT = Change in Temperature = T - 300 K

T = Final Temperature of the Block = ?

Therefore,

[tex]3.35\ x\ 10^5\ J = (2\ kg)(897\ J/kg.K)(T-300\ K)\\\\5.38\ x\ 10^5\ J + 3.35\ x\ 10^5\ J = (1794 J/K)(T)\\\\T = \frac{8.73\ x\ 10^5\ J}{1794\ J/K}[/tex]

T = 486.6 K

1.Beaker A has less thermal energy than Beaker B

2.The water molecules in both beakers A and B have the same average kinetic energy

The temperature of the water in each of two beakers is same (50°C).

Beaker One contains ([tex]m_{1}[/tex]) 100 g of water

Beaker Two contains ([tex]m_{2}[/tex]) 250 g of water

Heat gained and lose by the object is depends on mass, change in temperature and specific heat.

Both beakers are made with same materials so their Specific heats and temperature are same .

Beaker B has more mass then Beaker A  so Beaker A has less thermal energy than Beaker B.

2.The water molecules in both beakers A and B have the same average kinetic energy.

The temperature of an object is a measure of its internal energy. Thermal Energy is a form of Kinetic Energy because it is related to the Molecular Velocity.

When Temperature increases the velocity of the molecules ( increases or decreases) and the Kinetic Energy (increases or decreases) as Temperature decreases the velocity of the molecules ( increases or decreases) and the Kinetic Energy (increases or decreases).

so Kinetic Energy Depends on Velocity and Velocity depends on   the Temperature in this problem Temperature are same so The water molecules in both beakers A and B have the same average kinetic energy.

It takes a lot of heat to increase the temperature of liquid water because some of the heat must be used to break hydrogen bonds between the molecules.

In other words, water has a high specific heat capacity, which is defined as the amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius. The amount of heat needed to raise the temperature of 1 g water by 1 °C is has its own name, the calorie.

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Answer:

Explanation:

For a. its max height and when it occurs. First the max height. That's a y-dimension thing, and in the y-dimension we have this info:

v₀ = 48 ft/s

a = -32 ft/s/s

v = 0 (the max height of an object occurs when the final velocity of the object is 0). Use the following equation for this part of the problem:

v² = v₀² + 2aΔx and filling in:

[tex]0=48^2+2(-32)[/tex]Δx and

0 = 2300 - 64Δx and

-2300 = -64Δs so

Δx = 36 feet.

Now for the time it takes to get to this max height. Final velocity is still 0 here, but the equation is a different one for this part of the problem. Use:

v = v₀ + at and filling in:

0 = 48 - 32t and

-48 = -32t so

t = 1.5 sec.  That's part a. Onto part b:

The object hits the ground when its displacement, Δx, is 0. Use this equation for this problem:

Δx = v₀t + [tex]\frac{1}{2}at^2[/tex] and filling in:

[tex]0=48t+\frac{1}{2}(-32)t^2[/tex] and

[tex]0=48t-16t^2[/tex] and

0 = 16t(3 - t) so

t = 0 and t = 3.  t = 0 is before the object is propelled, so it makes sense that at 0 seconds, the object was still on the ground, right? Then at 3 seconds, it's back on the ground. (Isn't math just perfectly, beautifully sensible!?) Now onto part c:

We are looking for the time interval when the object is >32 feet. So we use the same equation we just used, but with an inequality instead of an equals sign:

[tex]48t+\frac{1}{2}(-32)t^2 >32[/tex] and get everything on one side and factor it again:

[tex]-16t^2+48t-32>0[/tex] and we find that

1 < t < 2 so the time interval is between 1 and 2 seconds that the object is over 32 feet in the air.

Answer: 350 N

Explanation:

Given

Mass of ball is [tex]0.5\ kg[/tex]

Speed of ball after rebound is [tex]v=2\ m/s[/tex]

Time period for impulse [tex]t=0.01\ s[/tex]

Impulse imparted in equal to the change in the momentum of object

[tex]\Rightarrow J=m(v-u)\quad [\text{u=speed of ball before collision}]\\\Rightarrow J=0.5\times \left(2-(-5)\right)\\\Rightarrow J=0.5\times 7\\\Rightarrow J=3.5\ N.s[/tex]

Impulse is the product of average force and duration of application

[tex]\Rightarrow J=F_{avg}\cdot \Delta t\\\Rightarrow 3.5=F_{avg}\times 0.01\\\\\Rightarrow F_{avg}=350\ N[/tex]

Answer:

less than one light year

Explanation:

earth is 0.00001581 light years away from the sun :)

Answer:

The answer is B. It has a central nucleus composed of 29 protons and 35 neutrons, surrounded by an electron cloud containing 29 electrons.

hope it helped fond

Answer:

The correct option is D.

Explanation:

The energy is the capacity to do work.

There are several types of energies.

1. kinetic energy : it is due to the motion of the body.

2. Potential energy : It is due to the position or the configuration of the body.

3. Mechanical energy: The sum of the kinetic energy and the potential energy is called mechanical energy.

The energy is a scalar quantity.

According to the law of conservation of energy, the energy can not be created and cannot be destroyed, it can transformed from one form to another.

When we get the mechanical energy negative, it means the energy was destroyed in some other forms of energy.  

Answer:

Force = 143.16 Newton

Explanation:

Given the following data;

Distance, S = 22 m

Initial velocity, U = 10 m/s

Final velocity, V = 25 m/s

Mass = 12 kg

To find the force acting on the box;

First of all, we would determine the acceleration of the box using the third equation of motion;

V² = U² + 2aS

25² = 10² + 2*a*22

625 = 100 + 44a

625 - 100 = 44a

525 = 44a

Acceleration, a = 525/44

Acceleration, a = 11.93 m/s²

Next, we find the force;

Force = mass * acceleration

Force = 12 * 11.93

Force = 143.16 Newton

Answer:

C. a disturbance that travels through a medium with a transfer of energy and without a transfer of matter

Explanation:

A wave is any disturbance that transfers energy from one location to the other via a substance called medium. It is important to note that a wave only conveys energy and not matter. For example, sound wave is a type of wave that carries sound energy from one place to another via mediums such as water, air etc.

Hence, according to this question, a wave can be described as a disturbance that travels through a medium with a transfer of energy and WITHOUT A TRANSFER OF MATTER.

His question is incomplete, the complete question is;

A film oil on water will appear dark when it is very thin, because the path length difference becomes small compared with the wavelength of light and there is a phase shift at the top surface.

If the oil film becomes dark when the path length difference is less than one fourth the wavelength, what is the thickest the oil film can be and appear dark at all visible wavelengths. Oil has an index of fraction of 1.40.

In this question, assume the wavelength visible light is in the range of 400 nm to 700 nm.

Answer:

the minimum thickness of the oil for destructive interference to occur is approximately 35.714 nm

Explanation:

Given the data in the question;

Path difference for destructive interference between the two reflected waves ( top and bottom );

δ = 2nt ---------- let this be equation 1

Also, for one path difference of reflected waves, one fourth of the wavelength of reflected waves;

δ = λ/4 ---------- let this be equation 2

from equation 1 and 2;

δ = δ

2nt =  λ/4

we find t;

8nt =  λ

t = λ / 8n

given that; λ[tex]_{minimum[/tex] = 400 nm and n = 1.40

we substitute

t = 400nm / 8(1.40)

t = 400nm / 11.2

t = 35.7142857 ≈ 35.714 nm

Therefore, the minimum thickness of the oil for destructive interference to occur is approximately 35.714 nm

Answer:

120°

Explanation:

straight line =   180°

light ray = 30°

the reflection will be like a mirror image

30°+30° = 60°

180° - 60° = 120°

The angle of incidence and the angle of reflection are equal

The correct option for the angle between the given light ray and the reflected ray is the option;

120°

Reason:

The given parameter are;

The angle formed by the light ray and the glass surface = 30°

Required:

To find the angle between the light ray and the reflected ray

Solution:

According to the laws of reflection, the angle between the incident ray and the normal is equal to the angle made between the reflected ray and the normal

The angle made between the incident ray and the normal, [tex]\theta _i[/tex] = 90° - 30° = 60°

Therefore, according to the laws of reflection, we have;

The angle made between the reflected ray and the normal, [tex]\theta _r[/tex] = The angle between the incident ray and the normal, [tex]\theta _i[/tex] = 60°

The angle made between the reflected ray and the normal, [tex]\theta _r[/tex] = 60°

The angle between the given light ray and reflected ray, θ = [tex]\theta _i[/tex] + [tex]\theta _r[/tex]

∴ θ = 60° + 60° = 120°

The angle between the given light ray and the reflected ray,  θ = 120°

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Answer:

Explanation:

Vector quantities are those quantities which needs both magnitude and direction for their description.

Here, in all the options except option B, there is no direction. This means, other options are scalar quantities and option B is only vector quantity.

Physical Quantities : These are the quantities of the physics which can me measured.

There are two types of physical quantities,

Vector quantities are those quantities which needs both magnitude and direction for their description. Example : Velocity, acceleration etc.

Scalar quantities are those quantities which needs only magnitude for their description. Example : Speed , distance etc.

Answer:

So what is this

Explanation:

I dont understand

Answer:

The purpose of step 1 is to induce magnetism into the needle, so that it retains magnetism and behaves as a magnet after the process.

Explanation:

The method of production the needle magnet in the procedure is the single stroke. This process involves a continuous stroking of a magnetic object (e.g needle) repeatedly for a period or number of times with a permanent magnet. Thus, when the permanent magnet is removed, the object retains magnetism, and behaves like a magnet.

The importance of the stroking process is the turn a magnetic object to a magnet by inducing magnetism into it.

Answer:

The concentration of hydrogen ion at pH is equal to 2 :[tex]= [H^+]=0.01 mol/L[/tex]

The concentration of hydrogen ion at pH is equal to 6 : [tex][H^+]'=0.000001 mol/L[/tex]

There are 0.009999 more moles of  [tex]H^+[/tex] ions in a solution at a pH = 2 than in a solution at a pH = 6.

Explanation:

The pH of the solution is the negative logarithm of hydrogen ion concentration in an aqueous solution.

[tex]pH=-\log [H^+][/tex]

The hydrogen ion concentration at pH is equal to 2 = [H^+]

[tex]2=-\log [H^+]\\[/tex]

[tex][H^+]=10^{-2}M= 0.01 M=0.01 mol/L[/tex]

The hydrogen ion concentration at pH is equal to 6 = [H^+]

[tex]6=-\log [H^+]\\\\[/tex]

[tex][H^+]=10^{-6}M= 0.000001 M= 0.000001 mol/L[/tex]

Concentration of hydrogen ion at pH is equal to 2 =[tex][H^+]=0.01 mol/L[/tex]

Concentration of hydrogen ion at pH is equal to 6 = [tex][H^+]'=0.000001 mol/L[/tex]

The difference between hydrogen ion concentration at pH 2 and pH 6 :

[tex]= [H^+]-[H^+]' = 0.01 mol/L- 0.000001 mol/L = 0.009999 mol/L[/tex]

Moles of hydrogen ion in 0.009999 mol/L solution :

[tex]=0.009999 mol/L\times 1 L=0.009999 mol[/tex]

There are 0.009999 more moles of  [tex]H^+[/tex] ions in a solution at a pH = 2 than in a solution at a pH = 6.

Answer:

all above

Explanation:

friction is necessary to live

Answer:

All of above

Explanation:

Answer:

Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidUna secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en caloríasad de calor produce?, expresado en calorías

Answer:

v = 0.92 c

Explanation:

Here, we will use the time dilation formula from Einstein's theory of relativity to find the speed of traveling of the friend:

[tex]t =\frac{t_o}{\sqrt{1-\frac{v^2}{c^2}}} \\\\\\\sqrt{1-\frac{v^2}{c^2}}=\frac{t_o}{t}\\\\[/tex]

where,

v = speed of traveling = ?

c = speed of light

t = time of return = 10 years

t₀ = time passed on earth = 4 years

Therefore,

[tex]\sqrt{1-\frac{v^2}{c^2}} = \frac{4\ years}{10\ years}\\\\ 1-\frac{v^2}{c^2}=(\frac{2}{5})^2\\\\\frac{v^2}{c^2} = 1-\frac{4}{25}\\\\\frac{v^2}{c^2} = \frac{21}{25}\\\\v^2 = 0.84c^2\\\\[/tex]

v = 0.92 c

Answer:

b and c

Explanation:

its correct

Explanation:

I am not understanding your question

Answer: The question is incomplete because the options are not given here are the options gotten from Another website.

A. Ultraviolet light detects the presence of radioactive substances.

B.Ultraviolet light shows cold areas as blue and warm areas as red.

C.Ultraviolet light causes substances to fluoresce and give off visible light.

D. Ultraviolet light transmits information to AM and FM radio receivers.

The correct option is C.

Ultraviolet light causes substances to fluoresce and give off visible light

Explanation:

This is because UV light radiates at a very short wavelengths compared to visible light which is impossible for humans to see it. Therefore , when UV light is absorbed by some particular materials, it reflect back towards the eye as visible radiation with a longer wavelength .This process is called UV-induced visible fluorescence.

Answer:

The Answer to question 14 is : glycerol (n=1.47)

The material should be considered as the glycerol (n=1.47).

Since

a beam of monochromatic light (f=5.09 × 10^14 Hz) has a speed of 2.04× 10^8 meters per second.

Now the material should be

= 3*10^8 / 2.04× 10^8

= 1.47

Hence, The material should be considered as the glycerol (n=1.47).

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Answer: 180

Explanation: Acellus

This equation gives the magnitude of the electric field generated by a point charge Q. The distance r in the denominator is the separation between the point of interest and the point charge Q. Or the center of a spherical charge.

It is simple to determine the size of the electric field by calculating the force per charge on the test charge. From this definition, the common metric units for electric field strength are derived. Electric field units would be force units divided by charge units, as the definition of an electric field is a force per charge.

F = |qvBsin()| calculates the magnetic force's magnitude. The following factors are involved in determining the force's direction. A plane is first defined by the magnetic field vector, B, and the velocity vector, v. In or out of this plane, the magnetic force is perpendicular to it.

Therefore, The electric force F, or Coulomb force, exerted per unit positive electric charge q at that place can be used to determine an electric field's strength, or E = F/q.

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Answer:

They take the shape of their container.​

I think since they move around and fit into anything perfectly.