The answer to my English subject

Answer:

because they are found freely in nature uncombined so they are highly reactive with other elements

Answer:

A

Explanation:

power =  energy/time

200 = energy / t

200 = 4000/t

t = 4000/200= 20 sec

Answer:

The decay constant, or "lambda" (λ), is the rate at which a radioactive isotope decays. It is usually measured in units of inverse time, such as seconds. In this case, the decay constant can be calculated as follows:

16:42

λ = (ln(2)/3.57 x 106) x (5.78 x 1017) = 0.

Explanation:

a) The capacitance of the ceramic capacitor is approximately 354.16 pF.

b) The potential difference between the plates of the capacitor will be approximately 3.39 x 10^6 volts.

To calculate the capacitance of the ceramic capacitor, we can use the formula:

C = (ε₀ * εᵣ * A) / d

where:

C is the capacitance,

ε₀ is the vacuum permittivity (approximately 8.854 x 10^(-12) F/m),

εᵣ is the relative permittivity of the ceramic (given as 100),

A is the effective plate area (given as 4 cm², which is equal to 4 x 10^(-4) m²),

d is the separation between the plates (given as 0.1 mm, which is equal to 0.1 x 10^(-3) m).

Let's calculate the capacitance in picofarads (pF):

a) Calculation of capacitance (C):

C = (ε₀ * εᵣ * A) / d

= (8.854 x 10^(-12) F/m * 100 * 4 x 10^(-4) m²) / (0.1 x 10^(-3) m)

= (8.854 x 100 x 4) / 0.1

= 354.16 pF

Therefore, the capacitance of the ceramic capacitor is approximately 354.16 pF.

b) To find the potential difference (PD) between the plates when the capacitor is given a charge of 1.2 μC (microcoulombs), we can use the formula:

PD = Q / C

where:

PD is the potential difference,

Q is the charge (given as 1.2 μC, which is equal to 1.2 x 10^(-6) C),

C is the capacitance (calculated in part a) as 354.16 pF, which is equal to 354.16 x 10^(-12) F).

Let's calculate the potential difference (PD):

b) Calculation of potential difference (PD):

PD = Q / C

= (1.2 x 10^(-6) C) / (354.16 x 10^(-12) F)

= 3.39 x 10^6 V

Therefore, the potential difference between the plates of the capacitor will be approximately 3.39 x 10^6 volts.

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Weight is the force that acts downwards due to the gravity of the planet.

The formula to calculate weight is

Here, m is the mass of any object and g is the acceleration due to gravity.

Volume is the space occupied by the mass of any object.

The formula of volume varies according to the shape and size occupied by the mass of the object.

Answer:

sbdjhdjrjrjrjrjrbdhhrhejejejejejejejejdndndjsj

Answer: My hypothesis was that the future results of the experiment would show a correlation. According to my data, my hypothesis was correct. The file uploaded to this assignment shows that the graph is a correlation but not a 100% positive correlation because if you imagined there was a straight line there, the points would be completely aligned. The correlation is simply a “positive correlation”. Some of the difficulties I had when performing the experiment was distinguishing which type of luster was for each mineral because the light almost looked the same with other minerals. You might change the procedure to avoid this problem in the way of getting all the rest of the results for that specific mineral and then look at which of the graph with the answers was most alike and then you can see why the luster is that certain result in that data which is the correct one. A graphical analysis can be used to explore the relationship between any two scientific variables by changing the numerical data of the experiment into a graph, which is a much more effective and easier way of interpreting the gathered results. It's easier to visualize a graph data than read all the tables with numbers.

The graph is in the attachment below and the 6 minerals also with their names, their density, and their hardness

The time elapsed between the first splash and the second splash is approximately 0.69 seconds.

To calculate this, we consider the motion of two rocks thrown simultaneously from a bridge. Heather throws a rock straight down with a speed of 14 m/s, while Jerry throws a rock straight up with the same speed.

We use the equation for displacement in uniformly accelerated motion: s = ut + (1/2)at^2.

For Heather's rock, which is thrown downwards, the initial velocity (u) is positive and the acceleration (a) due to gravity is negative (-9.8 m/s^2). The displacement (s) is the height of the bridge (46 m).

Solving the equation, we find two possible values for the time (t): t ≈ -4.91 s and t ≈ 1.91 s.

Since time cannot be negative in this context, we discard the negative value and consider t ≈ 1.91 s as the time it takes for Heather's rock to hit the water.

For Jerry's rock, thrown upwards, we use the same equation with the same initial velocity and acceleration. The displacement is also the height of the bridge, but negative.

Solving the equation, we find t ≈ -5.68 s and t ≈ 1.22 s. Again, we discard the negative value and consider t ≈ 1.22 s as the time it takes for Jerry's rock to reach its maximum height before falling back down.

To find the time difference between the first and second splash, we subtract t ≈ 1.91 s (Heather's rock) from t ≈ 1.22 s (Jerry's rock). This gives us a time difference of approximately 0.69 seconds.

Therefore, the time elapsed between the first splash and the second splash is approximately 0.69 seconds.

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Answer:

12 m/s²

Explanation:

We have Newton's 2nd Law of Motion:

Mass m is in kg and acceleration a is in m/s²

Our 1st acceleration given to us is a = 6 m/s². Let's substitute it into Newton's 2nd Law of Motion:

We are told that the net force doubles, meaning that the new force is 2F:

Mass doesn't change in this system; it is held constant due to Newton's 2nd Law of Motion. Therefore, to increase the net force acted on the object, the acceleration must change.

Since we are doubling the net force and mass stays constant, then acceleration also must double.

Therefore, our answer is (6 m/s²) · 2 = 12 m/s².

To model the discovery of electromagnetic induction, Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Tonya should use the procedure of moving a magnet into a coil of wire in a closed circuit.

Electromagnetic induction refers to the phenomenon of generating an electric current in a conductor by varying the magnetic field passing through it. This concept was discovered by Michael Faraday in the early 19th century. To model this discovery, Tonya needs to recreate the conditions that led to this breakthrough.

In Faraday's experiment, he observed that when a magnet is moved into or out of a coil of wire, it induces an electric current in the wire. This occurs when the magnetic field passing through the coil changes. Therefore, Tonya should use a similar setup to replicate this process.

Out of the given options, the most appropriate procedure for Tonya would be to move a magnet into a coil of wire in a closed circuit. By having a closed circuit, it means that the ends of the wire are connected to form a complete loop. When the magnet is moved into the coil, the changing magnetic field induces an electric current to flow through the wire.

This procedure demonstrates the principle of electromagnetic induction and shows how a changing magnetic field can produce an electric current. It allows Tonya to visually observe the effects of the induced current, which is essential in modeling the discovery of electromagnetic induction.

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Answer: 490

Explanation:

Answer:

with what? I can help but with what

Answer:

2

Explanation:

If the cloud is transparent, milky, thin layers, rain within the next 2 hours, then the cloud you are seeing is most likely a type of altocumulus cloud.

Altocumulus clouds are generally characterized by their white or gray color, and can sometimes appear milky or translucent. They often form in layers, and can be thin or thick depending on the conditions.

Altocumulus clouds are typically found at medium altitudes, between 6,500 and 20,000 feet and are often associated with unsettled weather conditions.

While they don't necessarily indicate that rain is imminent, altocumulus clouds can be a sign that a change in the weather is on the way.

Thus, if it is likely to rain in the next 2 hours, then the cloud must be altocumulus clouds.

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Hooke's Law can be given as follows sometimes:

The restoring force of a spring is equal to the spring constant multiplied by the displacement from its normal position:

F = -kx

Where, F = Restoring force of a spring (Newtons, N)

k = Spring constant (N/m)

x = Displacement of the spring (m)

The negative sign relates to the direction of the applied force and by convention, the minus or negative sign is present in F = -kx. The restoring force F is directly proportional to the displacement (x), according to Hooke's law. When the spring is compressed, the displacement (x) is negative. It is zero when the spring is at its original length and positive when the spring is extended.

Practically, Hooke's Law is applicable only within a limited frame of reference, and through experimenting, this statement proves to be true. Because materials cannot be compressed beyond a certain size or expanded beyond a certain size without some permanent deformation or change of their original state.

The law only applies under some conditions such as a limited amount of force or deformation. Factually, many materials will noticeably deviate from Hooke's law even before those elastic limits are reached.

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Answer:

Car A and Car B pass each other at the crossover point on the graph

.Car A and Car B are moving in opposite directions.

Car A is moving faster than Car B. these are the ansers

Explanation:

At the end of the Electroweak era, matter and antimatter annihilate each other. Because of a small imbalance in the ratio, the universe is left with only matter.

The baryogenesis process refers to the hypothetical mechanism or mechanisms that generated the observed baryon asymmetry in the universe which refers to the fact that there is much more matter than antimatter

If the universe were perfectly symmetric between matter and antimatter the particles and antiparticles would have annihilated each other completely leaving behind only radiation.

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Answer:

10N to the left side towards you

Explanation:

The net force is the resultant force that acts on a body.

Force is a push or pull on a body.    

 Push to left side  = 25N

 Pull to the right  = 15N

Net force  = Push to left side   -  Pull to the right  = 25N  - 15N

 Net force  = 10N to the left side towards you

The net force is therefore 10N to the left side towards you

Answer:

the horizontal component of the force is 50 N

Explanation:

Given;

force applied by the man, F = 100 N

angle of inclination of the force, θ = 60⁰

mass of the dog, m = 20 kg

The horizontal component of the force is calculated as;

\(F_x = F\times cos(\theta)\\\\F_x = 100 \ N \times cos(60^0)\\\\F_x = 100\ N \times 0.5\\\\F_x = 50 \ N\)

Therefore, the horizontal component of the force is 50 N

If the mass of one object is quadrupled and the distance is doubled, the new gravitational force will be the same or equal to 50 N.

The gravitational force can be thought of as an attracting force that pulls all mass-containing physical objects toward it. It is by far the least powerful known natural force.

The  gravitational force, F, of attraction between two objects, is given mathematically as follows:

F = GM₁M₂/r²

where;

G is the gravitational force constant

M₁ is the first mass

M₂is the second mass

r is the distance of separation

Given that the gravitational force between two objects is 50N.

If the mass of one object is quadrupled and the distance is doubled, the new force will be:

F = 4 * GM₁M₂/(2r)²

F = GM₁M₂/r²

Hence, the force remains the same.

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Answer:

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Explanation:

Answer:

the answer is nearly 5.655 \(ms^{-2}\)

Explanation:

Given,

\(v_{x}=2.7 ms^{-1}\)

\(v_{y}=13.3 ms^{-1}\)

\(t=2.4 s\)

\(a_{x}=\frac{2.7}{2.4}=1.125 ms^{-2}\) (as  \(a=\frac{v-u}{t}\))

\(a_{y}=\frac{13.3}{2.4}=5.542 ms^{-2}\)

\(a=\sqrt{a_{x}^{2}+a_{y}^{2} }\)

\(=\sqrt{1.125^{2}+5.542^{2} }\)

\(=5.655 ms^{-2}\)

hope you have understood this...

pls mark my answer as the brainliest

Some people believe in the possibility of telepathy through paranormal or supernatural means, but these claims are not supported by empirical evidence.

What is MRI?

MRI stands for Magnetic Resonance Imaging. It is a medical imaging technique that uses strong magnetic fields and radio waves to generate detailed images of internal structures of the body. MRI machines produce high-quality images of the body's soft tissues and organs, making them useful in diagnosing and monitoring various medical conditions. MRI scans are often used to detect abnormalities in the brain, spine, joints, and other parts of the body.

Telepathy, the ability to communicate thoughts or ideas through means other than the known senses, is not currently supported by scientific evidence. While MRI machines and other advanced technologies are used to study brain activity and communication, the concept of telepathy without such devices is not currently recognized as a scientifically valid phenomenon.

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hope it helps

The time taken for the cannonball to move upward before stopping, given that is was fired directly upward at 300 m/s is 30.6 seconds

Velocity and time are related according to the following equation of motion

v = u + gt

Where

From the question given above, the following data were obtained:

The time taken for the cannonball to move upward before stopping can be obtained as illustrated below:

v = u - gt (since the ball is going against gravity)

0 = 300 - (9.8 × t)

0 = 300 - 9.8t

Collect like terms

-9.8t = 0 - 300

-9.8t = -300

Divide both sides by -9.8

t = -300 / -9.8

t = 30.6 seconds

Thus, the time taken is 30.6 seconds

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Answer:

A. Reversibility

Explanation:

Because if you don't progress then you do the opposite, you reverse.

Sorry if my explanation is confusing it made sense in my head i just didn't know how to put it.

hope this help. ;)

Answer:

A. Reversibility

Explanation:

Thunder was heard 2second after the lightening .if the velocity of sound is 350m/s, the lightening is about 700 meters far.

In international agreement in 1983, the meter was redefined as the distance that light would travel in a vacuum within 1/299,792,458 of both a second, building on these and other advancements. In a vacuum, this definition also fixed the light's speed at 299,792,458 meters a second.

In terms of measurement, what does the word "meter" mean?

A typical metric unit called a meter is equivalent to around 3 feet, 3 inches. This indicates that metric measurement system includes the meter. Objects about one meter long include guitars, baseball bats, & yard poles. In athletic competitions like running and swimming, distances are also measured in meters.

The distance between the viewer and the lightning is about 700 meters.

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Answer:

A

Explanation:

An equal and opposite reaction happens when they run into eachother and bounce off. What makes it equal is when they have the same amount of force applied when they collided.

Answer:

distance means the length of any thing that have one starting point mad ending point

displacement means the short distance that move by an object due to help of any force

Answer:

there is examples and defination for distance and displacement

☁️ Answer ☁️

annyeonghaseyo!

The answer is:

Because it takes the Earth a full year to move from one end of its orbit to the other, and because that distance is so tiny compared to the distance to the star, and because the star is aligned with the Earth's axis of rotation, it doesn't appear to ever move. The north pole coincidentally points at this star.

Hope it helps.

Have a nice day noona/hyung!~ ￣▽￣❤️

The distance travelled by the vehicle around the circular track is 1,052.4 m.

The distance travelled by the vehicle in one complete cycle is calculated by using the following equation as show below.

d = 2πr

d = πd

Where;

In one complete cycle, the  vehicle will travel the circular track only once.

d = π(335 m)

d = 1,052.4 m

Thus, the distance travelled by the vehicle around the circular track is a function of the diameter of the circular track.

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The complete question is below:

A vehicle, starting from rest, accelerates on a circular track with a 335m diameter. What is the distance travelled by the vehicle when it makes one complete cycle?