What is the gravitational field theory and how does it work? four mark answer. Don't give me random answers just for points or i'll report you!

Answer:

I can not see the image, so i will answer in a general way.

As you know, the sound behaves like a wave, this means that the sound needs some time to cover a given distance. An example of this motion can be seen when you drop a little stone in water, and you can see how the waves expand.

This means that the one who will hear the sound first, will be always the one that is closer to the source of the sound, in this case, the sound comes from the ball hitting the backboard, then the one who is closer to the backboard will hear the sound first.

1. 107.1 MHz frequency: wavelength ≈ 2.80 meters.

2. 2.12 × 10^(-10) m wavelength: ultraviolet (UV) range.

3. 3.97 × 10^(-19) J/photon energy: visible light, possibly blue or violet.

To identify each type of electromagnetic radiation, we can use the relationships between frequency, wavelength, and energy of electromagnetic waves.

The equation that relates frequency (f) and wavelength (λ) of electromagnetic waves is:

c = f * λ

where c is the speed of light in a vacuum, approximately 3.00 × 10^8 m/s.

Given the frequency of 107.1 MHz, we can calculate the corresponding wavelength using the above equation:

107.1 MHz = 107.1 × 10^6 Hz

c = f * λ

λ = c / f = (3.00 × 10^8 m/s) / (107.1 × 10^6 Hz) ≈ 2.80 m

Therefore, the electromagnetic radiation with a frequency of 107.1 MHz corresponds to a wavelength of approximately 2.80 meters.

The second type of electromagnetic radiation has a wavelength of 2.12 × 10^(-10) m, which is in the range of the ultraviolet (UV) region of the electromagnetic spectrum.

Lastly, the third type of electromagnetic radiation has photons with an energy of 3.97 × 10^(-19) J/photon. This energy corresponds to photons in the visible light range, specifically within the blue or violet region of the spectrum.

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hello friends the answer does not exist

do you love me or not

To complete the sentences, we have

Equilibrium is the phenomenom in which no net force acts on an object.

Static equilibrium is equilibrium is which the body is at rest and has equaland balanced forces acting on it.

Dynamic equilibrium is equilibrium is which the body in motion and has equaland balanced forces acting on it.

So, to complete the sentences, we have

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Answer:

Explanation:

Distance = speed *time

as per the question, THE average speed is 40Km/h

time1 = S/40,time2 = S/40

now , time1 +time2

s/40+s/40

The time taken for Arun's journey can be calculated by dividing the distance to his school by the average speed. Assuming the school is 20km away, at an average speed of 40km/h, it would take Arun 30 minutes to reach school.

The question involves applying the concept of speed as being the distance traveled divided by the time it takes to get to the destination. To determine how long Arun's journey takes taking into account the average speed of 40km/h, we need to know the distance to school. However, if we assume the distance as 'd' kilometers, the time taken can be found by the formula: time = distance/speed

Let's say, for example, Arun’s school is 20 kilometers away. Using the formula time = distance/speed, we substitute the distance and speed into the formula: time = 20km / 40km/h = 0.5 hours. To convert this time into minutes, we multiply by 60 (since there are 60 minutes in an hour), which gives us 30 minutes. Therefore, if Arun’s school was 20 kilometers away, his journey would take him 30 minutes.

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Oil is optically denser than water. When sound/light goes from optically denser medium to optically rarer medium, their velocity increase and they moves away for normal.

The sound wave speeds up and bends

\( \Large{ \underline{ \boxed{ \pink{ \bf{Option \: (D)}}}}}\)

As, In optics we learnt that light undergoes refraction when travels from medium of different densities. Similarly, Sound also follows the law of refraction.

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Answer:

the sound wave slows down and bends

Explanation:

a p e x

Answer:

velocity of Trinity = 1m/s

Explanation:

Conservation of Momentum equation

m1u1+m2u2=m1v1+m2v2.

m1 = mass of penguin

u1 = initial velocity of penguin

v1 = final velocity of the penguin

m2 = mass of Trinity

u2 = initial velocity of Trinity

v2 = final velocity of trinity

5kg • 8m/s + 40kg • 0m/s = 5kg • 0m/s + 40kg • v2

40kg•m/s = 40kg • v2

divide each side by 40kg

1m/s = v2

The mass of the oxygen gas in the oxygen container is found to be 14 grams.

The volume of the oxygen container is 20L and the pressure of the container at 23 degree Celsius is 876 mmHg.

From the ideal gas equation,

PV = W/MRT

Where,

P is pressure,

V is volume,

M is the molar mass,

W is the actual mass,

R is the gas constant,

T is the temperature.

Putting values,

876 x 20 = W/16 x 62.36 x 300

W = 14 grams.

So, the mass of the oxygen gas in the container is 14 grams.

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Explanation:

here's the answer to your question

Answer: electrostatic force

Explanation:

electrostatic forces pull or push on objects without touching them, which is how when you rub some materials together they can result in something called a 'charge', being moved from point A to point B.

Answer:The Answer Is D

Explanation:

The equation for the electric field magnitude at the surface of the ball is:

\(E = \dfrac{\rho \times R}{3\epsilon_o}\)

To determine the electric field magnitude at the surface of the ball, we can use Gauss's law, which relates the electric flux through a closed surface to the charge enclosed within that surface. In this case, we can choose a spherical Gaussian surface with a radius R that encloses the entire ball.

According to Gauss's law, the electric flux Φ through the Gaussian surface is given by:

\(\phi = E \times 4\pi R^2\)

where E is the electric field magnitude at the surface of the ball.

The charge enclosed within the Gaussian surface is equal to the total charge q of the ball. Using the volume charge density ρ, we can express the charge q as:

\(q = \rho \times (\dfrac{4}{3})\pi R^3\)

Applying Gauss's law, we have:

\(\phi = E \times 4\pi R^2 = \dfrac{q}{\epsilon_o} = \dfrac{(\rho \times (\dfrac{4}{3}\pi R^3)}{\epsilon_o}\)

Solving for E, we get:

\(E = \dfrac{\rho \times R}{3\epsilon_o}\)

Therefore, the equation for the electric field magnitude at the surface of the ball is:

\(E = \dfrac{\rho \times R}{3\epsilon_o}\)

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Even while the sun is still on the main sequence, it may eventually threaten life on earth due to its increasing temperature.

The quantities of carbon dioxide, gas, and nitrous oxide in the earth's atmosphere are higher currently than they have ever been in the previous 800,000 years. The surface of the earth has grown as a result of these greenhouse gas emissions and the greenhouse effect.

More green house gases molecules are present in the atmosphere today, which results in the atmosphere collecting greater amounts of infrared radiation generated by the surface. The Earth's surface temperature increases as a result of part of the extra energy from a hotter atmosphere radiating back down to the surface.

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Answer: The position of the spring as a function of time is given by: x(t) = 6 * sin(π/4 * t)

where t is the time in seconds and x(t) is the position of the spring in meters.

Explanation:

The position of a spring as a function of time can be described by a sinusoidal function. The general form of such a function is:

x(t) = A * sin(ωt + φ) + x₀

where:

x(t) is the position of the spring at time t

A is the amplitude of the motion (maximum displacement)

ω is the angular frequency (related to the period T by ω = 2π/T)

φ is the phase angle (determines the starting point of the motion)

x₀ is the equilibrium position of the spring (where it would be at rest)

In this case, we know that the maximum displacement (amplitude) of the spring is 6m and the period T is 8s. Therefore, we can calculate the angular frequency ω as follows:

ω = 2π/T

ω = 2π/8

ω = π/4

We also know that the spring is at its equilibrium position when t = 0 (i.e., x(0) = x₀). Therefore, we can set x₀ to 0.

Finally, we need to determine the phase angle φ. This can be a bit tricky without more information, as there are many possible starting points for the motion that would produce a sinusoidal function with the given amplitude and period. For simplicity, we will assume that the spring is at its maximum displacement (positive direction) when t = 0. This means that the phase angle φ is 0.

Putting all of this together, we get:

x(t) = 6 * sin(π/4 * t)

This is the position of the spring as a function of time. It describes a sinusoidal motion with an amplitude of 6m and a period of 8s. The motion starts at the maximum displacement (positive direction) and oscillates back and forth around the equilibrium position (0).

The incline angle should be about 4.7 degrees and the block's acceleration would be greater than that of the rolling sphere.

a) Let M be the mass of the sphere, R be its radius, and θ be the incline angle. When the sphere rolls down the incline without slipping, the friction force acting on it causes a torque about its center of mass, which results in a rotational acceleration. If a is the linear acceleration of the center of mass, and α is the angular acceleration, then we have:

a = α R

Also, the torque τ caused by the friction force is given by:

\(τ = I α\)

where I is the moment of inertia of the sphere about its center of mass. For a solid sphere, I is given by:

\(I = (2/5) M R^2\)

Since the sphere rolls without slipping, the friction force is related to the normal force N by:

\(f = μ N\)

where f is the friction force, and μ is the coefficient of static friction. The normal force is related to the weight of the sphere by:

N = M g cos θ

where g is the acceleration due to gravity.

The net force acting on the sphere down the incline is given by:

\(Fnet = M g sin θ - f\)

The linear acceleration of the center of mass is given by:

\(a = Fnet / M\)

Substituting for f and N, we get:

\(a = g (sin θ - μ cos θ)\)

Equating this to α R, we get:

g (sin θ - μ cos θ) = α R

Substituting for α using the expression for I and τ, we get:

\(g (sin θ - μ cos θ) = τ / (2/5 M R)\)

Substituting for τ using the expression for f and N, we get:

\(g (sin θ - μ cos θ) = (μ M g cos θ) R / (2/5)\)

Simplifying, we get:

\(tan θ = (5/7) μ\)

Substituting the given values, we get:

tan θ = (5/7) (0.23)

\(θ = arctan(0.082)\)

θ = 4.7 degrees (approximately)

Therefore, the incline angle should be about 4.7 degrees

b) Since the block is frictionless, its acceleration down the incline is given by:

a' = g sin θ

Substituting the value of θ obtained in part a), we get:

a' = g sin(4.7) ≈ 0.41 g

Since this is greater than 0.23g, the block's acceleration would be greater than that of the rolling sphere.

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The statement "Gas tungsten arc welding was developed to weld magnesium and aluminum on world war ii fighter planes" is a TRUE statement.

Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, was developed in the 1930s and 1940s to weld magnesium and aluminum on World War II fighter planes. This welding process uses a non-consumable tungsten electrode, an inert gas (usually argon), and a filler metal to create strong and precise welds.

GTAW is most commonly used to weld thin sections of stainless steel and non-ferrous metals such as aluminum, magnesium, and copper alloys. The process grants the operator greater control over the weld than competing processes such as shielded metal arc welding and gas metal arc welding, allowing for stronger, higher quality welds.

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S.E.A.L Certified Answer ↓↓↓

FALSE...

Explanation:

Once the box hits the water, the forces are balanced (50 N down and 50 N up). However, an object in motion (such as the box) will continue in motion at the same speed and in the same direction. When the box strikes the water, it stops accelerating; yet it does not stop moving

Because:

Once the object hits the water, the forces are balanced and the object will stop. Support your answer with reasoning.

BRAINLIEST PLS... :)

Answer:

number one use carbon 14

Explanation:

Answer:

A

Explanation:

Carbon-14 testing of organic material such as wood can approximate the age by measuring the radioactive decay rate of the carbon-14 in the wood. From that a baseline for the trees age can be established and the ring patterns can by applied to a time period.

The speed with which the rock A, B and C  which are thrown same initial speed and same mass hit the ground is equal for all the rocks.

Let us consider the initial velocity be 1 m / s and the height of the cliff to be 10 m.

For the rock A which is thrown vertically downward,

v² = u² + 2 a s

v² = 1 + ( 2 * 9.8 * 10 )

v² = 197 m / s

v = 14 m / s

For rock B which is thrown horizontally,

vx = 1 m / s

v² = u² + 2 a s

v² = 0 + ( 2 * 9.8 * 10 )

v = 14 m / s

vy = 14 m / s

v = √ vx² + vy²

v = √ 1 + 14²

v = √ 197

v = 14 m / s

As we can see here all rocks start with same gravitational potential energy and end with same gravitational energy. So all rocks have equal velocity and kinetic energy, and so energy is conserved. So they all hit the ground with same speed.

Therefore, they all hit the ground with the same speed.

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Answer:

a.phytoplankton, zooplankton, small fish, large fish, large shark

Explanation:

The bottom level of the ocean's food chain is made up of one-celled organisms called phytoplankton. These tiny organisms are microscopic. They are so small they cannot be seen without a microscope. Billions of phytoplankton live in the upper part of the ocean. They take in the sun's light.

Phytoplankton, or plant plankton, is the first link in the food chain in the ocean. They require sunlight for photosynthesis, which they must perform. They therefore reside higher up in the shallow sunlight. Furthermore, they transform themselves into an ocean animal that can eat the “food” from the sun. Thus, option A is correct.

One-celled organisms known as phytoplankton make up the base of the ocean's food chain. These microscopic organisms are quite small. Without a microscope, they are invisible due to their small size. In the upper ocean, there are billions of phytoplanktons. They absorb the light from the sun.

Aquatic food webs are built on phytoplankton and algae. They are consumed by zooplankton, tiny fish, and crustaceans, which are the main consumers. Fish, tiny sharks, corals, and baleen whales all devour the primary consumers after them.

Therefore, phytoplankton, zooplankton, small fish, large fish, large shark  is a possible food chain in the ocean from start to finish.

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Answer:

okay

Explanation:

but what is the question here?

Answer:

She uses heat energy.

Explanation:

She uses heat energy. She transfers mechanical energy to heat energy wile staying in the car.

The distance horizontally, from the initial dropping point that the pit hit the ground is 11.2 meters.

The formula of distance is Distance = Speed x Time which is measured in meters.

7. The height of the car window h = 5.0 metres

The velocity of the car is 35 m/s.

The horizontal velocity of the cherry pit when it is released is then the same as that of the car Vx = 35m/s

The dropped cherry pit falls freely under gravity with a vertical downward acceleration equal to the acceleration due to gravity, g

Initially, the pit has no vertical component of velocity.

Therefore the time it takes to reach the ground t = \(\sqrt{} \frac{2h}{g}\)

t = √10/9.8

t= 0.32 seconds

The horizontal component of velocity is a constant, since there are no forces acting in the horizontal direction.

Therefore the horizontal distance travelled by the pit by the time it hits the ground is Vx * time

= 35 x 0.32

= 11.2 meters

attached is a picture of the situation above, where Vx = 35m/s

h = 5.0 meters

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Answer:

meters, yards or feet

Explanation: