An inclined plane creates a mechanical advantage of 5. What would the input force need to be to create an output force of 20 N?
A. 15 N
B. 100 N
C. 4 N

Answer:

please mark me brainliest

Explanation:

Gravitational force -an attractive force that exists between all objects with mass; an object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.

The Four Fundamental Forces of Nature are Gravitational force, Weak Nuclear force, Electromagnetic force and Strong Nuclear force. The weak and strong forces are effective only over a very short range and dominate only at the level of subatomic particles. Gravity and Electromagnetic force have infinite range.

Answer:

C

Explanation:

Nitrogen and Oxygen donates electron to each other

Nitrogen and oxygen has the greatest chance of forming a covalent bond. Option C is correct.

Covalent bonds are chemical bonds that keep atoms of different elements together while sharing electrons.

Compounds can be polar covalent or nonpolar covalent, depending on the electronegativity variations between components.

The nitrogen family, Group 15, can react with oxygen in a variety of ways. Nonmetallic elements include nitrogen and phosphorus and oxygen.

Ionic bonds often occur between a metal and a nonmetal. Covalent bonds are most commonly formed between two nonmetals.

Nitrogen and oxygen has the greatest chance of forming a covalent bond from given a pair of atoms.

Hence,option C is correct.a given

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Answer: 4.0 ohm

Explanation:

Answer:

Distance is 800 m and Displacement is 0 m

Explanation:

Total Distance

= 400(2)

= 800 m

Total Displacement

= 0 m since she returns to the same spot

Its value is 9.8 ms-2 when it is close to the earth's surface. Therefore, the acceleration due to gravity (g) is given by = GM/r2.Because kinematics equations are used when the acceleration of the object is constant.

Therefore, acceleration owing to gravity is the name given to the acceleration of falling objects in free fall.The kinematic equations can be used to analyze any falling object if friction and air resistance are minimal since the acceleration caused by gravity is constant.

Therefore, acceleration owing to gravity is the name given to the acceleration of falling objects in free fall.The kinematic equations can be used to analyze any falling object if friction and air resistance are minimal since the acceleration caused by gravity is constant.

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Answer:

3.125 Kilometers

Explanation:

To answer this you just multiply 12.5 by .25 (since 15 minutes is a quarter of an hour) to get 3.125 kilometers ridden.

Law of Reflection :

The law of reflection states that when light rays strike a smooth surface, the angle of reflection equals the angle of incidence, and the incident ray, reflected ray, and normal to the surface all lie in the same plane.

Here, let us consider, the ray A as the normal , as it is perpendicular to the surface of the plane mirror. When the incident ray hits the plane mirror at an angle say, θ  with the normal ( here, incident ray A) , then, θ will be  the angle of reflection.

Now if we consider all the incident rays A, B, C and D. Among them, let the ray C  make an  angle  Θ, with the normal ( here, incident ray A).

Therefore, from the image given, clearly,  θ = Θ, hence Θ is the angle of reflection, thus ray C best represents the reflected ray.

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The Frequency of the resultant pendulum will also be 2 Hz as f does not depend on mass.

The Oscillation frequency of a pendulum depends on 3 things

1. Lenght of string (L).

2. Gravitational pull which is constant for a  planet for earth it 9.8 m/s2.

3. Pie (π)  (Which is again Constant 3.14....)

And this case both the things, length, and g(Gravitational pull) are constant so the frequency will also be the same.

As T = 2π√(L/g) ........ T (Time)

And Frequency  = 1/T so it only required the length of string on which the mass is suspended so it will be constant as the length is taken as same as before.

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the average velocity is given by the change in displacement divided by the change in time: average velocity = (change in displacement) / (change in time) = 8 ft / 1 sec = 8 ft/sec.

To determine the average velocity of the particle over the time interval [1, 2], we need to find the change in displacement and divide it by the change in time.

Given that the displacement function is s(t) = 5t^2 - 7t + 2, we can find the displacement at the endpoints of the interval:

s(1) = 5(1)^2 - 7(1) + 2 = 5 - 7 + 2 = 0

s(2) = 5(2)^2 - 7(2) + 2 = 20 - 14 + 2 = 8

The change in displacement is s(2) - s(1) = 8 - 0 = 8 feet.

The change in time is 2 - 1 = 1 second.

Therefore, the average velocity is given by the change in displacement divided by the change in time:

average velocity = (change in displacement) / (change in time) = 8 ft / 1 sec = 8 ft/sec.

Therefore, the correct answer is 3. average vel. = 8 ft/sec.

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Answer:

because the wavelength of the light waves are too small

Explanation:

The statement is True. If graph A has a simple circuit of length 6 and graph B is isomorphic to graph A, then graph B also has a simple circuit of length 6. This is because isomorphic graphs have the same structure, which includes preserving the existence of circuits and their lengths.

This is because having a simple circuit of length 6 in graph a does not guarantee that graph b is isomorphic to graph a. Isomorphism requires more than just having a similar structure or simple circuit. It involves a one-to-one correspondence between the vertices of two graphs that preserves adjacency and non-adjacency relationships, as well as other properties.

Therefore, a "long answer" is needed to explain why the statement is not completely true or false.

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The rocket engine that fires against the direction a spacecraft is headed so the spacecraft slows down is called Retro engine.

Spacecraft are the space automobiles that might be capable of flying out of doors of the Earth’s ecosystem in the area. They offer us a method of transportation from the Earth to the area and objects in it. There may be numerous spacecraft that are familiar to most of people e.g. Apollo 11 which took Neil Armstrong and his group to the Moon.

Crewed Spacecraft – Crewed spacecraft are the ones that carry people to the area. There have been several crewed spacecraft to the area consisting of Vostok 1 – the first crewed spacecraft in records dispatched by way of the United States of America.

Earth-Orbit Satellites – all of the satellites, which orbit across the Earth, fall in this class. The maximum tremendous satellite in orbit on the Earth is Hubble Telescope.

Space Probe – these are unmanned spacecraft that might be fitted with medical instruments for exploring objects in space e.g. planets, Moon, and solar.

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To calculate the magnitude of the force that would exactly counterbalance these three forces, we need to use the principle of vector addition. This involves combining the three forces vectorially to find the net force acting on the object.

First, we need to find the resultant of the two forces that are at an angle of 90 degrees to each other. This can be done using the Pythagorean theorem:

Resultant = √(25² + 12²) = √(625 + 144) = √769 = 27.74 N

Next, we need to find the net force acting on the object by adding the third force (4 N) to the resultant of the first two forces (27.74 N).

Net force = 4 N + 27.74 N = 31.74 N

Therefore, the magnitude of the force that would exactly counterbalance these three forces is 31.74 N.

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In the PET (Positron Emission Tomography) technique, detectors record the emission of Positrons from active substrates to form a tomographic image of the cross-sectional distribution of tissue concentration.

Detectors are employed in the PET (Positron Emission Tomography) method to capture the positron emission from active substrates. The subatomic particle known as a proton has the opposite charge to that of an electron but the same mass. They are released into the body by certain radioactive isotopes called positron-emitting radionuclides.

An immediate collision between an emitting positron and an electron is known as annihilation. The positron and electron collide during annihilation, which causes the conversion of their masses into gamma-ray energy. High-energy photons make up these gamma rays. The gamma rays released during annihilation events are intended to be detected and measured by the detectors in a PET scanner.

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Answer:

it is d all of the above your welcome

The speaker most likely think about the wall that The wall protects his orchard. Hence option A is correct.

The term wall is derived from the Latin word vallum, which denotes "...an earthen wall or rampart set with palisades, a row or line of stakes, a wall, a rampart, fortification...", whereas murus is a defensive stone wall. The same word is used in English to refer to an exterior wall and the inside sides of a room, but this is not ubiquitous. Many languages differentiate between the two. Some of this contrast may be observed in German between Wand and Mauer, and in Spanish between pared and muro.The wall protects his orchard.

Hence option A is correct.

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Answer:

power per square meter = 4.593 × 10^(6) W/m²

Wavelength of peak intensity = 9.67 × 10^(-7) m

Explanation:

From Stefan-Boltzmann law, total emitted power per square meter is given as;

P/A = eσT⁴

where;

P is power

A is surface area

σ = Stefan-Boltzmann constant = 5.67 × 10^(-8) W/m².k⁴

T = temperature of the body = 3000 K

e = emissivity of the substance (for ideal radiation, it has a value = 1)

Thus, Plugging in the relevant values we have;

P/A = 1 × 5.67 × 10^(-8) × (3000)^(4)

P/A = 4.593 × 10^(6) W/m²

Let's find the wavelength of peak intensity.

From wiens displacement law, we know that;

λ_m × T = b

where;

λ_m = maximum wavelength

T = Temperature

b is Wien's displacement constant = 2.9 × 10^(−3) m/K

thus;

λ_m = b/T = (2.9 × 10^(−3))/3000 = 9.67 × 10^(-7) m

Condensation is an exothermic phase change. Hence the correct answer is A) Condensation.

Condensation is an exothermic phase change because it involves the transition of a substance from the gaseous state to the liquid state. During condensation, the gas molecules lose energy and come together to form a liquid. This energy release is typically in the form of heat, making condensation an exothermic process.

In contrast, the other phase changes listed are endothermic.

Melting (B) is the transition from a solid to a liquid, vaporization (C) is the transition from a liquid to a gas, and sublimation (D) is the transition from a solid directly to a gas.

These processes require an input of energy to overcome intermolecular forces and break the bonds between particles, making them endothermic.

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An ecologist hiking up a mountain may notice different biomes along the way due to changes in all of the following except latitude. The correct answer is option C.

Latitude refers to the distance from the equator and plays an essential role in determining biomes. Biomes are affected by various factors, such as temperature, precipitation, and topography, and each has unique plant and animal life. Climate, precipitation, temperature, soil type, and elevation, all affect biomes.

Latitude, on the other hand, determines how much sun a location receives, which influences biomes, but it is not the only factor. Elevation and temperature play a crucial role in determining biomes because as altitude rises, temperature and precipitation tend to decrease, which influences the type of biome. Therefore, an ecologist hiking up a mountain may notice different biomes along the way due to changes in elevation, temperature, and precipitation, but not latitude.

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Answer:

80 J

Explanation:

PE = mgh

PE = (4 kg)(9.8 m/s^2)(2 m)

PE = 78.4 J and with sig figs, it would be 80 J

The disk is moving at a speed of approximately 3.42 m/s, spinning at an angular velocity of about 4.02 rad/s, and approximately 8.47 radians of the string has unwrapped from around the rim.

To solve this problem, we can use the principles of rotational motion and kinematics.

Given:

Mass of the disk (m) = 21.0 kg

Radius of the disk (r) = 85.0 cm = 0.85 m

Applied force (F) = 35.0 N

Distance moved (d) = 7.2 m

1. Determining the linear velocity (v):

We can use the work-energy principle to find the linear velocity of the disk. The work done by the applied force is equal to the change in kinetic energy.

Work done (W) = Change in kinetic energy (ΔKE)

The work done is equal to the force multiplied by the distance moved:

W = F * d

The change in kinetic energy is given by:

ΔKE = (1/2)mv²

Setting the two expressions equal to each other and solving for v, we get:

Fd = (1/2)mv²

Solving for v:

\(v = \sqrt{\frac {(2Fd)}{m}\)

Plugging in the values, we have:

v = \(\sqrt{\frac {(2)(35.0)(7.2)}{21.0}}\)

v ≈ 3.42 m/s

Therefore, the disk is moving at approximately 3.42 m/s.

2. Determining the angular velocity (ω):

The linear velocity and angular velocity are related by the formula:

v = ωr

Rearranging the formula, we get:

ω = v / r

Plugging in the values, we have:

ω = 3.42 / 0.85

ω ≈ 4.02 rad/s

Therefore, the disk is spinning at approximately 4.02 radians per second.

3. Determining the amount of string unwrapped:

The distance moved by the disk is equal to the distance unwrapped from around the rim.

Therefore, the amount of string unwrapped is equal to the distance moved, which is given as 7.2 m.

θ = 7.2 / 0.85

θ ≈ 8.47 radians

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True, the Faraday constant represents the charge of 1 mole of electrons. It is denoted by F and is approximately equal to 96,485.34 coulombs per mole.

It relates the amount of electric charge (in coulombs) to the number of moles of electrons involved in an electrochemical reaction.

The Faraday constant is named after the British scientist Michael Faraday, who made significant contributions to the field of electromagnetism. It is an important constant in various electrochemical calculations and is used to determine the quantity of electric charge transferred during redox reactions or electrolysis processes.

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Answer:

C D E is the answer

Explanation:

The products of the reaction are; CO2, SO2, H2O.

A chemical reaction equation equation is composed of;

The interaction between the reactants give rise to the formation of the products. The products are the result of rearrangement of atoms in the reactants.

For the reaction; CH3SH + 4O2 →  , the products of the reaction are; CO2, SO2, H2O.

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The formula for an electric field's work is as follows: The particle was pushed 1.25 metres in the electric field as a result of W = qEd.

When a charge is transported in an electric field, work is done. A positively charged particle, such a proton, would accelerate in the direction of the arrows if it were placed in an electric field.

W = qEd

Rearranging the formula to solve for d:

d = W/(qE)

Substituting the given values:

\(d = 15 J / (4 C * 3 N/C)\)

d = 1.25 meters

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Answer:

D

Explanation:

These all can impact the magnetic properties

The child has approximately 590 Joules of potential energy. Potential energy is calculated by multiplying the weight (6.12 kg) by the height (10 m) and the acceleration due to gravity (9.8 m/s²),

Giving a result of 600.216 Joules. Rounded to the nearest whole number, the child has 590 Joules of potential energy. The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass, g is the acceleration due to gravity, and h is the height. In this case, the child's mass is 6.12 kg, the height is 10 m, and the acceleration due to gravity is approximately 9.8 m/s². Plugging these values into the formula, we get PE = 6.12 kg × 9.8 m/s² × 10 m = 600.216 Joules. Rounding to the nearest whole number, the child has approximately 590 Joules of potential energy.

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Answer:

C. pressure

because heat expands and so does explosions and gravity is just gravity.

Answer:

450N

Explanation:

Given parameters:

Mass of object  = 450kg

Initial velocity  = 15m/s

Final velocity  = 75m/s

Time  = 1min  = 60s

Unknown:

Force applied  = ?

Solution:

To solve this problem, from Newton's second law of motion, we know that;

  Force  = mass x acceleration

  Acceleration  = \(\frac{v - u }{t}\)

 v is the final velocity

 u is the initial velocity

 t is the time taken

Now;

    Force  = mass x  \(\frac{v - u }{t}\)

   Force  = 450 x \(\frac{75 - 15}{60}\)  = 450N