How fast does a apple fall if it falls at 5mph?

Answer:

C=A>B>E>D

Explanation:

Answer:

A sound wave is the pattern of disturbance caused by the movement of energy traveling through a medium such as air, water, or any other liquid or solid matter, as it propagates away from the source of the sound. The source is some object that causes a vibration, such as a ringing telephone, or a person's vocal chords.

Explanation:

Eating less red meat so fewer cattle need to be raised would help reduce global warming.

The production of red meat, particularly beef, is a major contributor to greenhouse gas emissions. Cattle produce methane, a potent greenhouse gas, and the production of feed for cattle also requires large amounts of energy, water and land. Additionally, the clearing of forests for grazing land and feed production also contributes to carbon emissions.

Riding a bicycle rather than walking to school would also help reduce global warming because it would decrease the amount of CO2 emissions produced by cars and other vehicles.

Clearing more forests to produce more farmland and using more fertilizers to increase crop production would not help to reduce global warming, as the clearing of forests causes a release of stored carbon into the atmosphere and the use of fertilizers and pesticides also has an environmental impact.

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Electricity and magnetism are interrelated phenomena, and the right-hand rule provides a way to visualize the relationship between the two.

The right-hand rule (or F=BIL) is a mnemonic device used to show the relationship between electricity and magnetism in a current-carrying conductor. It is based on the observation that when a current-carrying conductor is placed in a magnetic field, a force is exerted on the conductor, causing it to move.

The right-hand rule states that if the thumb of the right hand points in the direction of the current, and the fingers of the right hand curl in the direction of the magnetic field, then the palm of the right hand will face in the direction of the force exerted on the conductor. This relationship is mathematically represented by the equation:

F = BIL

Where:

F is the force exerted on the conductor (newtons)

B is the strength of the magnetic field (teslas)

I is the current flowing through the conductor (amperes)

L is the length of the conductor in the magnetic field (meters)

This equation shows that the force exerted on the conductor is proportional to the strength of the magnetic field, the current flowing through the conductor, and the length of the conductor in the magnetic field.

This relationship between electricity and magnetism can be explained by the fact that an electric current creates a magnetic field around the conductor, and a magnetic field exerts a force on a current-carrying conductor. Therefore, electricity and magnetism are interrelated phenomena, and the right-hand rule provides a way to visualize the relationship between the two.

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Answer:

It allows them to write better and more comprehensible research papers. As well as being able to communicate the relevance and impact of their ideas and discoveries.

Explanation:

Ursa Major is now the object that is closest to the zenith. Using this date and time as a reference, set the star wheel finder to 8 p.m. on April 24. The northern sky contains the constellation Ursa Major.

Its mythology is believed to have prehistoric roots. Its Latin name, which contrasts it with nearby Ursa Minor, the lesser bear, is "greater (or larger) bear." The zenith is a hypothetical point on the celestial sphere that is situated directly "above" a specific location. "Above" refers to a direction that is parallel to the ground and counter to the direction of gravity there (nadir). The celestial sphere's "highest" point is called the zenith.

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Let's call the length of the race track as "x".

To solve for "x", we can use the formula:

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

Since the race ends in a tie, we know that Jan and Mary both took the same amount of time to run the race. Let's call this time "t".

\(\implies \text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x - 25}{7.5}\)

\(\implies\text{ Time} = \dfrac{\text{ Distance}}{\text{ Speed}}\)

\(\implies t = \dfrac{x}{8.0}\)

Since both expressions represent the same time, we can set them equal to each other and solve for "x":

\(\implies \dfrac{x - 25}{7.5} = \dfrac{x}{8.0}\)

Multiplying both sides by 60 (the least common multiple of 7.5 and 8.0) to get rid of the decimals:

\(\implies 8(x - 25) = 7.5x\)

\(\implies 8x - 200 = 7.5x\)

\(\implies 0.5x = 200\)

\(\implies x = 400\)

\(\therefore\) The length of the race track is 400 meters.

\(\blue{\overline{\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad\qquad}}\)

If the width of the slit is doubled, the distances between bright spots on the screen will decrease, resulting in a closer spacing of the bright spots.

If the width of the slit is doubled, the distances between bright spots on the screen will decrease. This is because doubling the width of the slit will result in a larger diffraction angle, causing the interference pattern to become more spread out.

On the other hand, if the distance from the slits to the screen is doubled, the distances between bright spots on the screen will increase. This is because doubling the distance will result in a larger diffraction angle, causing the interference pattern to become more compressed and the bright spots to be spaced farther apart.

In summary, doubling the width of the slit will decrease the distances between bright spots, while doubling the distance from the slits to the screen will increase the distances between bright spots.

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A 0 20-kg hockey puck initially traveling 5.0 m/s is pushed on ice by a hockey stick with a constant force of 7.0 N over a distance of 8.0 m. Friction is negligible. The final velocity of the hockey puck can be determined by using the equation, where Vf is the final velocity, Vi is the initial velocity, a is the acceleration, and d is the distance.Vf² = Vi² + 2ad

The force exerted on the hockey puck is given as,F = 7.0 NThe distance travelled by the hockey puck is given as,d = 8.0 mThe initial velocity of the hockey puck is given as,Vi = 5.0 m/sThe mass of the hockey puck is given as,m = 0.20 kgWe can determine the acceleration experienced by the hockey puck by using the following formula,

F = maSolving for a, we geta = F / ma = F / ma = (7.0 N) / (0.20 kg)a = 35.0 m/s²Substituting the values in the formula for final velocity,Vf² = Vi² + 2adVf² = (5.0 m/s)² + 2 × (35.0 m/s²) × (8.0 m)Vf² = 25.0 m²/s² + 560.0 m²/s²Vf² = 585.0 m²/s²Taking the square root of both sides, we get,Vf = √(585.0 m²/s²)Vf = 24.2 m/sTherefore, the final velocity of the hockey puck is 24.2 m/s.

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The amount of charge that can be placed on a capacitor depends on the capacitance, which is determined by the area of each plate.

The capacitance of a capacitor is given by the formula:

C = ε0 * (A / d)

Where:

C is the capacitance,

ε0 is the permittivity of free space (a constant value),

A is the area of each plate,

d is the separation between the plates.

To determine the amount of charge, we can rearrange the formula as:

Q = C * V

Where:

Q is the amount of charge,

V is the voltage across the capacitor.

Given that the area of each plate is 7.3 cm², we can use this information to calculate the capacitance. However, the question does not provide the voltage or any other information required to calculate the amount of charge accurately. Without knowing the voltage or other relevant parameters, it is not possible to determine the exact amount of charge that can be placed on the capacitor.

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Answer:

The motion of the moon around the earth is circular motion

Explanation:

The statement, "All activity on the sun's surface is called solar activity." is: False.

While the term "solar activity" does encompass a wide range of phenomena occurring on the sun's surface, it specifically refers to the dynamic and variable behavior observed on the sun.

Including sunspots, solar flares, coronal mass ejections (CMEs), and solar prominences. Solar activity is an umbrella term that encompasses various events and processes related to the sun's magnetic field and energy release.

It is important to note that the sun is a highly active celestial body, and its activity can have significant impacts on Earth's space weather and technological systems.

Scientists study solar activity to understand the sun's behavior, predict solar events, and assess their potential effects on our planet.

In summary, solar activity refers to the collective phenomena and events occurring on the sun's surface, reflecting its dynamic nature and influence on space weather.

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Answer:

Light consists of photons, which are produced when an object's atoms heat up. Light travels in waves and is the only form of energy visible to the human eye.

Explanation:

Now What is light?

-Light ( or light energy ) is defined as a form of electromagnetic radiation and a type of kinetic energy.

-Light is made up of photons. Photons is the basic unit of light. They are produced when an object's atom is subjected to heat. The more the atoms are heated, the more photons are created.

-Light travels in the form of a wave but it does not require any medium for transmission.

-Light travels so fast, nothing is faster than it. It travels at a constant speed of 186,282 miles/sec ( 300,000 km/sec ) in vacuum and whether the source is moving or stationary.

-Light can be measured in either joules, calories ( energy units ), quanta and einsteins ( quantum units ). Conversion from one unit to another heavily depends on wavelength.

Now an unaided human eye can only see the visible light, namely red, orange, yellow green, blue, indigo and violet (Roy G Biv) but light also comes in other forms that we cannot see, they are named, radio wave, microwave, infrared, ultraviolet, x-ray and gamma ray.

The car is approximately 191 meters away.

To determine the distance to the car, we can use trigonometry. We know that the angular distance subtended by the car is 1.5°, and we know the actual length of the car is 5.0 m. We can set up a ratio using the tangent function:

tan(1.5°) = opposite/adjacent

where the opposite side is the length of the car (5.0 m) and the adjacent side is the distance to the car (which we are solving for).

Rearranging the equation, we get:

distance = opposite/tan(1.5°)

distance = 5.0 m / tan(1.5°)

Using a calculator, we find that tan(1.5°) is approximately 0.0262. Therefore:

distance = 5.0 m / 0.0262

distance ≈ 191 m

So the car is approximately 191 meters away.

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The acceleration is shown by the graph's slope. The acceleration is likewise decreasing because the curve's slope is getting flatter and less steep.

Acceleration is equivalent to the slope of a velocity against time graph. The ratio of the change in the y-axis to the change in the x-axis is the formula for slope. This is the same as the acceleration equation. Hence, acceleration is equal to the slope of a velocity vs. time graph.

Acceleration is indicated by a velocity-time graph's slope.

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An applied 25 n force pushes on a 5.0 kg object resting on a frictionless horizontal surface. the force is directed downward at a 20 degree angle is 23.49N

X- component = 25cos20° = 23.49 N

All objects with mass or energy are attracted to one another by gravity, which derives from the Latin word for "weight" (gravitas). By far the weakest of the four fundamental interactions, gravity is 1038 times weaker than the strong interaction, 1036 times weaker than the electromagnetic force, and 1029 times weaker than the weak interaction. As a result, it has no discernible impact on the level of subatomic particles. The motion of planets, stars, galaxies, and even light are all governed by gravity, which is the most important interaction between objects at the macroscopic level.

On Earth, gravity lends weight to physical objects, and the Moon's gravity is what causes sublunar tides in the oceans (the analogous antipodal tide is brought on by the Earth's inertia).

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1.  a) no charge

2. a) a transverse wave

3. d) all of the above.

4. a) greater than that of radio waves.

5. b) lower than that of radio waves.

6. d) all of the above.

7. d) all of the above.

8. d) all of the above

9. a) exist for all particles

10. a) modifies classical results

11.  b) the returnee is younger

12. d) all of the above statements are correct.

1. An electromagnetic wave consists of oscillating electric and magnetic fields that propagate through space. It does not carry any net charge.

2. Electromagnetic waves are transverse waves, meaning that the direction of the electric and magnetic fields is perpendicular to the direction of wave propagation.

3. Light exhibits both wave-like and particle-like behavior, as described by the wave-particle duality principle in quantum mechanics.

4. Gamma rays have a higher frequency than radio waves, which means they have more oscillations per unit of time.

5. Gamma rays have a shorter wavelength than radio waves, indicating that the distance between successive wave crests is smaller.

6. When a tree is located 20 meters from a convex lens with a focal length of 10 cm, the image formed is inverted (upside down), diminished (smaller in size compared to the object), and real (can be projected on a screen).

7. An arrow placed 2 cm from a convex lens with a focal length of 5 cm will produce an erect (upright), virtual (cannot be projected on a screen), and magnified (larger in size compared to the object) image.

8. A parabolic mirror, such as a parabolic reflector or a parabolic antenna, has the property of focusing all parallel rays of light (or electromagnetic waves) to a single point called the focus. It also reflects rays originating from the focus in a parallel direction, which is useful for applications like satellite dish antennas. Furthermore, parabolic mirrors can work for a wide range of electromagnetic waves, including radio waves.

9. De Broglie waves, proposed by Louis de Broglie, suggest that particles, such as electrons and protons, exhibit wave-like properties. They are not limited to sound waves or specific particles like hydrogen. De Broglie waves play a crucial role in understanding the wave-particle duality of matter.

10. The Lorentz factor, denoted as γ (gamma), is a term in special relativity. It modifies classical results as objects approach the speed of light, accounting for time dilation, length contraction, and relativistic mass increase. It is a key factor in understanding the effects of high-speed motion and is not limited to geometric optics.

11. In the Twin Paradox scenario, the traveling twin experiences time dilation due to their high velocity, causing them to age slower compared to the twin who stays at home. Thus, when they reunite, (b) the returnee is younger. This phenomenon is a consequence of special relativity and has been confirmed by experiments and observations.

12. Bohr's atomic model describes electrons in discrete energy levels or orbits. According to the model, electrons can jump to lower orbits, emitting photons in the process. They can also spontaneously jump to higher orbits. Additionally, the model suggests that the electron orbit would eventually decay, resulting in the electron spiraling into the proton. However, this aspect is not consistent with modern understanding and is considered a limitation of Bohr's model.

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Answer:

Electron Cloud Model

Explanation:

The second and fourth ones are in the name...

Bohr and Dalton aren´t Schrodinger

The planetary model is proposed by Dalton too.

The Electron Cloud Model was proposed by Schrodinger and Heisenburg, that calculate the region in the Electron Cloud that an electron can be most likely found.

It is complicated for me to explain, hahaha

Quantum Physics...

The luminosity of the hotter star is approximately 81 times larger than that of the cooler star.

The luminosity of a star is directly related to its temperature according to the Stefan-Boltzmann law, which states that the luminosity of a star is proportional to the fourth power of its temperature. In this case, the temperature of the hotter star is 9000 K, while the temperature of the cooler star is 3000 K.

To calculate the ratio of their luminosities, we can use the formula:

Luminosity ratio = (T₂ / T₁)⁴

where T₂ is the temperature of the hotter star and T₁ is the temperature of the cooler star.

Substituting the given values, we have:

Luminosity ratio = (9000 K / 3000 K)⁴

                = (3)⁴

                = 81

Therefore, the luminosity of the hotter star is approximately 81 times larger than that of the cooler star.

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The resistance of component X is 2.88 Ω when there is the correct potential difference across the heater.

Given that the heater is designed to work from a 3.6V supply and has a power rating of 4.5W at this voltage. We know that the power of the heater is 4.5W and voltage across the heater is 3.6V.The relationship between power, voltage and current is given by the formula:

Power = Current * Voltage .So, we can calculate the current in the heater as: I = \frac{P }{VI }= \frac{4.5 }{ 3.6I} = 1.25A .

Using Ohm's law, we know that: V = IR ,Where V is the voltage across the heater, I is the current in the heater and R is the resistance of the heater. Rearranging the above equation, we get:

R = \frac{V }{ IR} =\frac{ 3.6 }{1.25R} = 2.88 Ω

Therefore, the resistance of component X is 2.88 Ω when there is the correct potential difference across the heater. Note: Power is the rate at which work is done. It is expressed in Watts (W). Resistance is the opposition offered by a material to the flow of electric current through it. It is measured in Ohms (Ω).

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Answer:

10.466

Explanation:

I used pythagorean theorem. It is A^2 + B^2 = C^2 then square root of C^2 to find C which was 10.466.

F = ma

☆...hope this helps...☆

_♡_mashi_♡_

Answer:

F = MA

Force (Newtons) = Mass (Kilograms) x Acceleration (m/s^2)

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The electric field has an angle of 0 degrees and a magnitude of 2546.35 N/C.

An electric field is a physical field that surrounds electrically charged particles and acts as an attractor or repellent to all other charged particles in the vicinity. It can also refer to a system of charged particles' physical field. Each location in space where a charge exists in any form can be considered to have an electric field attached to it. The electric force per unit charge is another name for an electric field. E = F/Q is the formula for the electric field. Volts per meter is the SI unit for the electric field. The Newton's per coulomb unit is the same as this one. Newton is a unit of force and Coulomb is a unit of energy in these derived units.

Here,

E=kq/r^2

r= 5 x r^2 = 7.07 cm or .0707 m

E=(9 x 10^9)(1 x 10^-9)/(.0707)^2

= 1800.5 N/C

Now to find the x component,

cos 45 = x/1800.5

x= 1273.18 N/C

Now just multiply by 2 to accommodate both charges,

E=2546.35 N/C in direction of 0 degrees

The electric field has a magnitude of 2546.35 N/C and an angle of 0 degrees.

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Answer:

because you increase pressure in the straw

Explanation:

to suck the water up the straw its increasing pressure

Answer:

MIRROR

Explanation:

Answer:

reflection of light is the bouncing back of light rats when it falls on a smooth surface or polish surface.

Answer:

His distance would be 80 or 13 something. I dont really understand this question. Just be sure to look into other answers pls.

Explanation:

Answer:

Once you have drawn the free-body diagram, you can use vector addition to find the net force acting on the object. We will consider three cases as we explore this idea:

Case 1: All forces lie on the same line.

If all of the forces lie on the same line (pointing left and right only, or up and down only, for example), determining the net force is as straightforward as adding the magnitudes of the forces in the positive direction, and subtracting off the magnitudes of the forces in the negative direction. (If two forces are equal and opposite, as is the case with the book resting on the table, the net force = 0)

Example: Consider a 1-kg ball falling due to gravity, experiencing an air resistance force of 5 N. There is a downward force on it due to gravity of 1 kg × 9.8 m/s2 = 9.8 N, and an upward force of 5 N. If we use the convention that up is positive, then the net force is 5 N - 9.8 N = -4.8 N, indicating a net force of 4.8 N in the downward direction.

Case 2: All forces lie on perpendicular axes and add to 0 along one axis.

In this case, due to forces adding to 0 in one direction, we only need to focus on the perpendicular direction when determining the net force. (Though knowledge that the forces in the first direction add to 0 can sometimes give us information about the forces in the perpendicular direction, such as when determining frictional forces in terms of the normal force magnitude.)

Example: A 0.25-kg toy car is pushed across the floor with a 3-N force acting to the right. A 2-N force of friction acts to oppose this motion. Note that gravity also acts downward on this car with a force of 0.25 kg × 9.8 m/s2= 2.45 N, and a normal force acts upward, also with 2.45 N. (How do we know this? Because there is no change in motion in the vertical direction as the car is pushed across the floor, hence the net force in the vertical direction must be 0.) This makes everything simplify to the one-dimensional case because the only forces that don’t cancel out are all along one direction. The net force on the car is then 3 N - 2 N = 1 N to the right.

Case 3: All forces are not confined to a line and do not lie on perpendicular axes.

If we know what direction the acceleration will be in, we will choose a coordinate system where that direction lies on the positive x-axis or the positive y-axis. From there, we break each force vector into x- and y-components. Since motion in one direction is constant, the sum of the forces in that direction must be 0. The forces in the other direction are then the only contributors to the net force and this case has reduced to Case 2.

If we do not know what direction the acceleration will be in, we can choose any Cartesian coordinate system, though it is usually most convenient to choose one in which one or more of the forces lie on an axis. Break each force vector into x- and y-components. Determine the net force in the x direction and the net force in the y direction separately. The result gives the x- and y-coordinates of the net force.

Example: A 0.25-kg car rolls without friction down a 30-degree incline due to gravity.

We will use a coordinate system aligned with the ramp as shown. The free-body diagram consists of gravity acting straight down and the normal force acting perpendicular to the surface.

We must break the gravitational force in to x- and y-components, which gives:

F_{gx} = F_g\sin(\theta)\\ F_{gy} = F_g\cos(\theta)F

gx

​

=F

g

​

sin(θ)

F

gy

​

=F

g

​

cos(θ)

Since motion in the y direction is constant, we know that the net force in the y direction must be 0:

F_N - F_{gy} = 0F

N

​

−F

gy

​

=0

(Note: This equation allows us to determine the magnitude of the normal force.)

In the x direction, the only force is Fgx, hence:

F_{net} = F_{gx} = F_g\sin(\theta) = mg\sin(\theta) = 0.25\times9.8\times\sin(30) = 1.23 \text{ N}F

net

​

=F

gx

​

=F

g

​

sin(θ)=mgsin(θ)=0.25×9.8×sin(30)=1.23 N

Answer:

Answer is A

Explanation:

GOT IT RIGHT ON A P E X :)

The reason for the apparent motions of the sun and other stars across the night sky is the rotation of earth. Hence, option (A) is correct.

The rotation of the planet Earth around its own axis and variations in the orientation of the rotation axis in space are referred to as Earth's rotation or Earth's spin. Earth rotates prograde in an easterly direction. Earth rotates against the direction of the northern polar star Polaris.

The Northern Hemisphere's North Pole, sometimes referred to as the Geographic North Pole or Terrestrial North Pole, is where the Earth's axis of rotation and surface meet. The North Magnetic Pole of the Earth is distinct from this place. The other location where the axis of rotation of Earth crosses the surface is the South Pole, which is located in Antarctica.

The reason for the apparent motions of the sun and other stars across the night sky is the rotation of earth. Hence, option (A) is correct.

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The force of gravity between the two objects is 1.33 x 10⁻¹⁰ N.

The force of gravity between the two objects is calculated by applying Newton's law of universal gravitation.

Fg = Gm₁m₂ / r²

where;

Fg = ( 6.67 x 10⁻¹¹ x 1 kg x 2 kg ) / ( 1 m )²

Fg = 1.33 x 10⁻¹⁰ N

Thus, the force of gravity is proportional to the product of the masses and inversely proportional to the square of the distance between them.

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Explanation:

The buoyant force must be greater to float, otherwise it would sink, its like a barrel in water, the more water weight in it the more it sinks, the more air weight the more it rises.