Plz do it all plz plz and i will give brainlest and thanks to best answer do it right plz

Answer:

b,d,f

Explanation:

The energy of one photon of the light is 1.19 x \(10^{-11}\) J.

What is Planck's equation?

According to this, electromagnetic radiation from heated bodies emits in discrete energy units or quanta, the size of which depends on a fundamental physical constant (Planck's constant).

We know that,

E = hν

Where,

E = Energy

h = Planck's constant

ν = Frequency

Note: Planck's constant has value of 6.63 × \(10^{-3}\)\(\frac{J}{s}\)

Putting values in the given formula

E = 6.63 × \(10^{-3}\) \(\frac{J}{s}\) × 1.8 × \(10^{13}\) \(s^{-1}\)

E = 1.19 x \(10^{-11}\) J.

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Answer: 1.44m/s West

Explanation:

Given the following :

Mass of skater = 60kg

Average force = 240N east

Time of = 0.360 seconds

The Velocity after 0.360seconds

Recall the relation:.

Force(f) * time(t) = mass (m) * (final Velocity(V) - initial velocity(u))

Where ; final Velocity(v) - initial velocity(u) = Magnitude of velocity(V)

Ft = mV

240 × 0.360 = 60 × V

60 × V = 86.4

V = 86.4 / 60

V = 1.44m/s

According to Newton's third law, to every action, there is an equal and opposite reaction.

The action force acts in the eastern direction hitting the wall with a force of 240N, therefore direction after hitting the wall will be in the opposite (western direction) direction, which is the direction of the reaction force

Therefore, velocity is 1.44ms West

The ethologists definition of a genetically programmed action pattern is a sequence of responses that are innate and inherited in a species that occur in a stereotyped, predictable way in response to a particular stimulus.

In animal behavior, a genetically programmed action pattern is a series of behaviors that are predictable, organized, and innate. A response series that is programmed genetically is a characteristic behavior pattern that a particular animal species consistently exhibits. An animal's responses to environmental stimuli are largely genetically inherited and innate.These behavior patterns are characterized by their predictability, regularity, and specificity. They are consistently shown by animals of the same species in response to a particular environmental cue. In animals, this response is referred to as a fixed action pattern (FAP). It is a behavior that is innate and fixed in an organism's genotype.

An instinctual behavioural sequence that is highly stereotyped and species-specific is referred to as a fixed action pattern in ethology. The intrinsic releasing mechanism, a "hard-wired" neural network, is claimed to create fixed action patterns in response to a sign/key stimulus or releaser. A fixed action pattern runs to completion after being released.

Konrad Lorenz, who created the idea, is frequently linked to this phrase. Fixed action patterns include six properties, according to Lorenz. These traits describe stereotyped, complicated, species-specific, released, triggered, and experience-independent fixed action patterns.

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The gravitational potential energy of the toy is converted into kinetic energy as it falls.

We will utilize the law of conservation of energy to determine the velocity of the toy just before it strikes the ground, which is mgh = 1/2mv²,

where m is the mass of the toy,

h is the height from which it is falling,

g is the acceleration due to gravity, and

v is the velocity with which it hits the ground.

Using the provided figures, we get, m = 5 kg,

h = 3.7 m, and

g = 9.8 m/s².

Substitute these values in the formula. 5*9.8*3.7 = 1/2(5)v²

On solving, we get v² = 181.3 or

v = √(181.3)

V = 13.5 m/s (approx).Hence, the velocity of the toy just before it hits the ground is 13.5 m/s.

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The feature of the components that changes in chemical reactions is the chemical bonds between atoms. Option D

Chemical reactions involve the rearrangement of atoms to form new substances with different chemical properties. In a chemical reaction, the bonds between atoms in the reactant molecules break, and new bonds form to create the products. This rearrangement of atoms is governed by the principles of chemical bonding.

Chemical bonds are formed when atoms share or transfer electrons to achieve a more stable configuration, typically by filling their outermost electron shells. Different types of chemical bonds can exist, including covalent bonds, ionic bonds, and metallic bonds, depending on the nature of the atoms involved.

During a chemical reaction, the types of atoms involved and the numbers of atoms remain the same. The atoms themselves do not change; rather, they rearrange to form new compounds or molecules. The chemical equation for a reaction represents this rearrangement, showing the reactant molecules on one side and the product molecules on the other side.

For example, in the combustion of methane (CH4), the methane molecule reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O):

CH4 + 2O2 -> CO2 + 2H2O

In this reaction, the carbon and hydrogen atoms from methane combine with oxygen atoms to form carbon dioxide and water molecules, respectively. The chemical bonds between the atoms break and new bonds form to create the products. Option D

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Answer:

\(T_f=24.71\)

Explanation:

From the question we are told that:

Mass of block \(m=50\)

Temperature of block \(T_b =140 \textdegree C\)

Volume of water \(V= 90L\)

Temperature of water \(T_w=10 \textdegree C\)

Density of water \(\rho=1000kg/m^3\)

Specific heat of water \(C_w=4.18KJ/kg-k\)

Specific heat of copper \(C_p=0.96KJ/kg-k\)

Generally the equation for equilibrium stage is mathematically given by

\(mC_p(T_b-T_f)=\rho*VV*c(T_f-T_w)\)

\(50*0.96(140-T_f)=1000*90*10^-3*c_w(T_f-10)\)

\(48(140-T_f)=376.2(T_f-10)\)

\(140-T_f=7.8375(T_f-10)\)

\(140-T_f=7.8375T_f-78.375\)

\(-8.8375T_f=-218.375\)

\(T_f=\frac{-218.375}{-8.8375}\)

\(T_f=\frac{-218.375}{-8.8375}\)

\(T_f=24.71\)

Dividing these two numbers yields a total of 6.34 ✕ 1021 Coulombs.

A coulomb (C) is the standard unit of electric charge in the International System of Units (SI). It is the amount of electricity that a 1-ampere (A) current carries in one second (s).

The car battery moved 6.34 ✕ 1021 electrons through the starter motor to start the car engine. This is equivalent to 6.34 ✕ 1021 Coulombs of charge.

One Coulomb is equal to 6.24 ✕ 1018 electrons, so to calculate the number of Coulombs, we simply need to divide 6.34 ✕ 1021 electrons by 6.24 ✕ 1018 electrons.

Dividing these two numbers yields a total of 6.34 ✕ 1021 Coulombs.

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Answer:

aerobic fitness

Explanation:

i just looked it up lol

If A 5.0 kg block has an acceleration of .20 m/s^2 when a force is exerted on it. A second block has an acceleration of .10 m/s^2 when subject to the same force. Then the mass of the second block 10kg.

Acceleration is rate of change of speed with respect to time. i.e a = if an object changes its velocity in short time, we can say that it has grater acceleration. a= Δv/Δt According to the equation change in velocity can be positive or negative hence acceleration can be positive or negative. the acceleration which is negative is called as deceleration. When a body decelerates its velocity gets decreased and when it accelerates its velocity increases. Force is mass times acceleration.

Force on first block,

F = ma = 5×0.20 = 1 N

mass of second block

m = F/a = 1/0.10 = 10kg

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stay the same -Gravitational force relies only upon distance and the masses - not their sizes. A shorter Earth (of the same mass) would not exert a different force on the Moon.

The gravitational force exists as a force that attracts any two objects with mass. We reach the gravitational force attractive because it always attempts to pull masses together, it never makes them apart. In fact, every object, including you, lives pulling on every other object in the whole universe!

The gravitational force on Earth stands equivalent to the force the Earth exerts on you. At rest, on or around the surface of the Earth, the gravitational force equals your weight.

stay the same -Gravitational force relies only upon distance and the masses - not their sizes. A shorter Earth (of the same mass) would not exert a different force on the Moon.

Hence, Option  A. staying the same is correct.

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The magnitude of potential difference that the proton accelerates through is 3.34 x 10⁶ V under the condition that the proton with a speed of 2.0 x10⁵ m/s .

The potential difference that the proton accelerated through can be calculated using the following formula:

ΔV = (m x (v2² - v1²)) / (2 x q)

Here,

ΔV = potential difference in volts,

m = mass of the proton in kg,

v1 = initial velocity of the proton in m/s,

v2 = final velocity of the proton in m/s

q = charge of a proton in Coulombs.

Staging  the given values into this formula,

ΔV = (1.67 x 10⁻²⁷ kg x((4 x 10⁵ m/s)² - (2 x 10⁵ m/s)²)) / (2 x 1.60 x 10⁻¹⁹ C)

ΔV = 3.34 x 10⁶ V

Hence, the magnitude of potential difference that the proton accelerated through is 3.34 x 10⁶ V.

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The magnitude of potential difference the proton accelerated through is 2.4 x 10^−14 volts.

In order to calculate the magnitude of the potential difference, we can use the equation for the change in kinetic energy (ΔK) of a charged particle accelerated through a potential difference (ΔV):

ΔK = eΔV

Given that the initial speed of the proton (v1) is 2.0 x 10^5 m/s and the final speed (v2) is 4.0 x 10^5 m/s, we can find the change in kinetic energy:

ΔK = (1/2) m (v2^2 - v1^2)

Using the mass of the proton (m = 1.67 x 10^−27 kg) and rearranging the equation, we can solve for ΔV:

ΔV = ΔK / e

Substituting the given values into the equation, we get:

ΔV = (1/2) m (v2^2 - v1^2) / e

Plugging in the values, we find:

ΔV = (1/2) (1.67 x 10^−27 kg) ((4.0 x 10^5 m/s)^2 - (2.0 x 10^5 m/s)^2) / (1.60 x 10^−19 C)

Evaluating this expression gives us the magnitude of the potential difference:

ΔV = 2.4 x 10^−14 volts.

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Answer:

C

Explanation:

A P E X

The process that is the source of all the thermal energy produced by a nuclear reactor is nuclear fission. The correct option is C.

The process by which an atom's nucleus divides into two daughter nuclei in nuclear physics. Fission, the splitting of uranium atoms, is the source of nuclear energy.

This produces heat that creates steam, which a turbine generator uses to produce power. A type of energy emitted by an atom's nucleus, which is composed of protons and neutrons, is known as nuclear energy.

Fission, which occurs when atom nuclei split into several pieces, and fusion, which occurs when nuclei combine, are the two methods by which this type of energy can be created.

Therefore, the correct option is C. Nuclear fission.

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Answer:

spring tides

Explanation:

Answer:

Spring Tides

Explanation:

I'm sorry that its a late answer.

The kind of spring should be held constant so as to improve the validity of the experiment.

Hooke's law states that the force that acts on a spring is directly proportional to the extension of the spring as long as the elastic limit is not exceeded.

As such, we can now understand that we can only be able to talk about the Hooke's law if there is no way in which the material has passed the elastic limit of the material. In this case, we are told that the students just embarked on a kind of experiment and they want to be able to verify the validity of the Hooke's law.

We saw that the masses that were hanged were increased but the springs were also changed. This would not allow us to determine the force constant and the Hooke's law accurately.

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The pencil will be magnified by a factor of 2.665.

To find the image distance for a concave mirror with a focal length of 0.32m when a pencil is placed 0.2m in front of it, we can use the mirror equation:

1/f = 1/di + 1/do

where:

f = focal length of the mirror = -0.32m (negative because it's a concave mirror)

di = image distance (unknown)

do = object distance = -0.2m (negative because the object is placed in front of the mirror)

Plugging in the values:

1/-0.32 = 1/di + 1/-0.2

Simplifying:

-3.125 = 1/di - 5

1/di = -3.125 + 5

1/di = 1.875

di = 1/1.875

di = 0.533m

Therefore, the image distance is 0.533m.

To find the magnification, we can use the formula:

magnification (m) = - di / do

Plugging in the values:

m = -0.533m / -0.2m

Simplifying:

m = 2.665.

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Answer:

If solid ice were denser than water, it would sink. In the most extreme conditions, there would be no way to melt the ice in deep lakes and oceans, which would thicken from the bottom to the surface, forming permanently frozen bodies of ice and disrupting Earth's water cycle.

Explanation:

This ice layer insulates the water below it, allowing it to stay liquid, which allows the life within it to survive. If ice sank, the liquid water on top would also freeze and sink, until all the liquid water became frozen. Water is less dense as a solid, than as a liquid, which is why ice floats.

Answer:

The answer(s) for this question are as followed: A, C, & D

Explanation:

I hope this helped, let me know if i missed any.

Answer:

The correct option is;

C. 40 N

Explanation:

Given that the rock is on the ground, we have;

The weight of the rock, \(F_W\) = 40 N ↓

From Newton's third law of motion, we have that action and reaction are equal and opposite,

Therefore, given that the weight of the rock exerts a force of 40 N on the ground, and the rock is stable and stationery on the ground, then the ground is reacting to the weight of the rock with an equal force of 40 N, acting in opposite direction to the weight of the block to balance the weight of the rock and create equilibrium such that the net force acting on the rock is zero

∑F = \(F_W + F_R\) = 0

Where;

\(F_R\) = The reaction of the ground

We have;

\(F_W\) + \(F_R\)= 40 + \(F_R\)  = 0

\(F_R\) = 0 - 40 = -40

\(F_R\) = -40 N ↓

∴ \(F_R\) = 40 N ↑.

Answer:

C, 40N

Explanation:

Answer: D

Myopia is caused when your eye is too long OR the cornea is too curved, meaning the light that enters your eye wont focus properly. With this information, I would go with D.) none of the above.

Hope this helps!

- Moiselle

The energy required to make one He-3 nucleus is 3.27 MeV.

The formation of He-3 can occur through several nuclear reactions, including the fusion of two deuterium nuclei, the decay of tritium, and the capture of a neutron by He-3. The energy required to make one He-3 nucleus varies depending on the specific reaction that is taking place.

However, the fusion of two deuterium nuclei, which produces He-3 and a proton, is one of the most common and energy-efficient reactions used to create He-3. This reaction requires an energy input of 3.27 MeV (mega-electron volts) to overcome the electrostatic repulsion between the positively charged deuterium nuclei and bring them close enough together for the strong nuclear force to take over and fuse the nuclei.

Regarding the balance of nuclear equations, all nuclear reactions must obey the laws of conservation of mass and conservation of charge. This means that the sum of the mass numbers and the sum of the atomic numbers (proton numbers) must be equal on both sides of the equation. Therefore, nuclear equations must be balanced to ensure that the same number of positive charges and the same mass are present on both sides of the equation.

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The following Celsius temperatures to Kelvin

a} The boiling point of liquid hydrogen -252.87C is 20.28K

b} The temperature of a winter day in the north pole -40.0C is 233.15K

c} The melting point of gold 1064C is 1337.15K

Temperature is defined as the physical quantity that quantitatively expresses the perception of hotness and coldness which is measured with a thermometer.

For the conversion of Celsius to Kelvin, the following formula is used

Kelvin = Celsius + 273.15.

For above given example,

Conversion of Liquid hydrogen into Kelvin= -252.87+273.15= 20.28K

Conversion of temperature of a winter day into Kelvin= -40+273.15= 233.15K

Conversion of Melting point of Gold into Kelvin= 1064+273.15= 1337.15K

Thus, following are the conversion:

a} The boiling point of liquid hydrogen -252.87C is 20.28K

b} The temperature of a winter day in the north pole -40.0C is 233.15K

c} The melting point of gold 1064C is 1337.15K

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Mars is the focus of much scientific study about possible human colonization. Its surface conditions and the presence of water on Mars make it arguably the most hospitable of the planets in the Solar System, other than Earth. Mars requires less energy per unit mass (delta-v) to reach from Earth than any planet except Venus.

Permanent human habitation on a planetary body other than the Earth is one of science fiction's most prevalent themes. As technology has advanced, and concerns about the future of humanity on Earth have increased, the argument that space colonization is an achievable and worthwhile goal has gained momentum. Other reasons for colonizing space include economic interests, long-term scientific research best carried out by humans as opposed to robotic probes, and sheer curiosity.

One of Elon Musk's stated goals through his company SpaceX is to make such colonization possible by providing transport, and to "help humanity establish a permanent, self-sustaining colony on Mars within the next 50 to 100 years".

Many organizations support the colonization of Mars. They have also given different reasons and ways humans can live on Mars. One of the oldest organizations is the Mars Society. They promote a NASA program that supports human colonies on Mars. The Mars Society have set up Mars analog research stations in Canada and the United States. All other organizations include MarsDrive, who wants to help fund settlements on Mars, and Mars to Stay. Mars to Stay advocates settlements on Mars. In June 2012, Mars One released a statement that they believe could help start a colony on Mars by 2023.

Answer:

Momentum is equal to mass for velocity (p1=mv)

But momentum is also equal to Force for time of impact (p1=Ft). Hence the impact force is inversely proportional to the fall time and directly proportional to the mass and fall velocity : F=mv/t^2 or F=p1/t

If he slows down, v diminishes and F diminishes

Hence correct Answer is C

Answer and Explanation:

Using a = F/m, we get:

Acceleration for Road A = 480/62 = ~7.74 m/s^2

Acceleration for Road B = 240/62 = ~3.87 m/s^2

Acceleration for Road C = 600/62 = ~9.68 m/s^2

If the net force becomes higher than 600N and the mass stays constant, the acceleration will increase proportionally to how much the force increases and the acceleration will be greater than the acceleration when the force is 600N.

I hope this helps! :)

Explanation:

μ = coefficient of friction.

F = Frictional force = 12N

R = Normal reaction = mg = Weight = 240N

m = mass

g = acceleration due to gravity ≈ 9.8ms—²

μ = F/R

μ = 12/240

μ = ¹/20

μ = 0.05

Answer:

The third law states that all forces between two objects exist in equal magnitude and opposite direction: if one object A exerts a force FA on a second object B, then B simultaneously exerts a force FB on A, and the two forces are equal in magnitude and opposite in direction: FA = −FB.

Answer:

1 an object at motion will remain at motion and a object at rest will remain at rest until a outward force acts upon it

2 force is equal to mass multiple acceleration

3 if an object is acted on with a downward force the object will reflect with a same net force in the opposite direction

Explanation:

Answer: It sends signals and messages throughout the body.

Answer:

b.

Explanation:

if you read B. its explains it sends signals and messages throughout your body so thats uour nervous system.

your welcome

The work done on the wire when it is stretched by an amount x is \((YAx^2)/(2L).\).

The work done on a wire of length L and cross-sectional A made of a material of Young's modulus Y when it is stretched by an amount x can be calculated using the formula:

Work done = \((YAx^2)/(2L)\)

This formula is derived from the relationship between stress, strain, and Young's modulus, which is given by:

Stress = (Young's modulus) x Strain

Stress is the force applied to the wire divided by its cross-sectional area (F/A), and strain is the change in length of the wire divided by its original length (x/L). Substituting these values into the equation and rearranging gives us:

F = (YAx)/L

To find the work done, we need to multiply the force by the distance the wire is stretched (x):

Work done = F x x

=> (YAx x x)/L

=>\((YAx^2)/(2L)\)

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Answer:

pretty sure it is gravity

Answer:

Electricity

Explanation: