I WILL MARK BRAINIEST

Answer:

Gravitational fields are determined only by the mass ( or mass-energy) of a body. ... magnetic fields are produced by charged particles in motion, and depend on the charge and velocity of these particles, but not on their mass. Magnetic fields are 'polar' fields with a North and South polarity.

Explanation:

Answer:

b because to react with something makes it a chemical reaction

Explanation:

To answer this question, we need to use the formula that relates force, mass, and acceleration: F=ma. We can rearrange this formula to solve for acceleration: a=F/m.

In this case, we are given that the force applied by the motor is 13.9N, and we need to find the velocity at which it will pull a mass. We are not given the mass directly, but we can calculate it using the power of the motor (300W) and the velocity we are trying to find.

Power is defined as the rate at which work is done, or P=W/t, where W is the work done and t is the time it takes to do that work. In this case, we can assume that the work done is moving the mass a certain distance, and we can use the velocity to calculate the time it takes to do that work. So, we have:

P=Fv

where P=300W, F=13.9N, and v is the velocity we want to find. Rearranging this equation gives:

v=P/F

Now we can substitute in the values for P and F to get:

v=300/13.9

v≈21.6 m/s

So, at a velocity of 21.6 m/s, a 300.W motor applying a force of 13.9N can pull a mass.

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The probability density function of X is plotted for a=1/2 and a=2.

The expected value of X (E[X]) is determined.

The expected value of 1/X (E[1/X]) is determined.

The variance of X (V[X]) is determined.

The median of X is determined.

When a=1/2, the probability density function of X is given by p(X=x∣a)=((1/2)+1)x(1/2)^0=(3/2)x for x∈[0,1]. When a=2, the probability density function becomes p(X=x∣a)=(2+1)x^2=3x^2 for x∈[0,1]. To plot the probability density function, we can assign different values of x within the range [0,1], calculate the corresponding probabilities using the given formulas, and plot the points on a graph.

The expected value of X (E[X]) is calculated by integrating the product of X and its probability density function over the range [0,1]. For a=1/2, E[X] = ∫(x * (3/2)x) dx from 0 to 1. For a=2, E[X] = ∫(x * 3x^2) dx from 0 to 1. By evaluating these integrals, we can determine the expected values.

The expected value of 1/X (E[1/X]) is calculated similarly to E[X], but instead of integrating X, we integrate 1/X using the respective probability density functions for different values of a.

The variance of X (V[X]) can be computed by taking the second moment of X (E[X^2]) minus the square of the first moment (E[X]) squared. V[X] = E[X^2] - (E[X])^2. By calculating E[X^2] using the probability density function and the expected values obtained in step 2, we can determine the variances for different values of a.

The median of X is the value of X such that the cumulative distribution function (CDF) is equal to 0.5. To find the median, we integrate the probability density function from 0 to the median value and set it equal to 0.5. Solving for the median provides its value in terms of the parameter a.

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Estimating the number of apples that is the energy equivalent of 1 gallon of gasoline is difficult, as the energy content of both substances is different. However, we can calculate the energy content of one gallon of gasoline and compare it to the energy content of one apple. So, approximately 1,045,454 medium-sized apples will be the energy equivalent of one gallon of gasoline.

Explanation:

What is the energy content of 1 gallon of gasoline?

The energy content of gasoline is measured in British Thermal Units (BTUs). According to the US Energy Information Administration, one gallon of gasoline contains approximately 115,000 BTUs.Therefore, to calculate the number of apples that are the energy equivalent of one gallon of gasoline, we need to determine the energy content of one apple.

Calculating the energy content of apples:

The energy content of an apple varies depending on its size and type, but on average, one medium-sized apple contains about 95 calories or 0.00011 BTUs.To calculate how many apples are equivalent to one gallon of gasoline, divide the BTU content of gasoline by the BTU content of one apple:115,000 BTUs ÷ 0.00011 BTUs/apple ≈ 1,045,454 applesTherefore, approximately 1,045,454 medium-sized apples are the energy equivalent of one gallon of gasoline.

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Answer:

the answer is main sequence star

Answer:

The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges.

Explanation:

Answer: A magnet has two ends called poles the answer are the poles

North pole and South pole

Explanation:

plz mark brainliest

The activation energy of the composite reaction is 25 kJ mol-1.

In a composite reaction with a fast pre-equilibrium step followed by an elementary step, the activation energy of the composite reaction is determined by the highest activation energy in the rate-determining step. In this case, the fast pre-equilibrium step has forward and reverse activation energies of 25 kJ mol-1 and 38 kJ mol-1, respectively, while the elementary step has an activation energy of 10 kJ mol-1.

Since the forward activation energy in the pre-equilibrium step (25 kJ mol-1) is the highest value, it determines the

activation energy of the composite reaction.

Summary: Considering the given activation energies in the pre-equilibrium and elementary steps, the activation energy of the composite reaction is 25 kJ mol-1.

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Option C is the best choice since the ball will travel at the same speed just at bottom of the hill because the hill height is the same for both balls.

work results in KE modification.

Change in \(KE_mgh = 1/2 mv2\)  equals gravitational work.

A ball's velocity needs to be utilized to generate energy potential as it is tossed into the air. The pitcher's potential power increases, while its speed decreases. An object obtains energy whenever a power is given to it and results in movement in the direction of the force. the measurement of how efficiently a machine uses energy to carry out tasks. Often, a vehicle's effectiveness is stated as a percentage.

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                            "Complete question"

Ball #1 is rolled down the steeper side of a hill while ball #2 rolls down the opposite side which is less steep. Both balls roll out onto a flat surface at the same level. Assuming there is no friction, how do the speeds of the balls compare when they reach the flat surface?

a. Ball #1 has the greater speed.

b. Ball #2 has the greater speed.

c. The speed will be the same for both balls.

d. Not enough information is given.

Answer:

14.4

Explanation:

distance / time

so

72/5

14.4

Answer:

can anyone translate

Explanation:

because i cant read this

Answer:

ans a

Explanation:

The wavelets that stop light waves from spreading are not present at every point on a wavefront, hence the answer is yes.

A radiation beam of a single frequency that exhibits coherence, a fixed relationship between the phase of waves. Coherent light beams have a stable phase difference between their waves; noncoherent beams have unpredictable or fluctuating phase relationships.

In laser light, the waves are not parallel. Unless you have an indefinitely wide beam, it is theoretically impossible to create a beam with precisely parallel rays. Even a completely spatially coherent beam will disperse due to diffraction.

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Answer:

Explanation:

We know the frequency and the velocity, both of which have good units. All we have to do is rearrange the equation and solve for

λ

:

λ

=

v

f

Let's plug in our given values and see what we get!

λ

=

340

m

s

440

s

−

1

λ

=

0.773

m

ANSWER:

0.732 m^3/s

STEP-BY-STEP EXPLANATION:

We must convert from ft^3/min to m^3/s.

To do this, we must take into account the following conversion factors:

1 meter is equal to 3.28 feet

1 minute is equal to 60 seconds

Knowing this, we do the conversion just like this:

The fans airflow in m^3/s is 0.732

The intensity of sound is a measure of the power carried by sound waves per unit area. It is expressed in watts per square meter (W/m2). The intensity of sound can be calculated by dividing the power of the sound waves by the area over which they are spread.

This measure is useful in understanding the strength or loudness of sound and its potential impact on the environment or human hearing.

Sound waves transport energy from a sound source to the surrounding environment. The power of sound waves refers to the rate at which this energy is transferred. It is typically measured in watts (W), which represents energy per unit time. To determine the intensity of sound, this power is divided by the area on which the sound waves are incident.

The area over which the sound waves spread can vary depending on the context. For example, in outdoor environments, the area may be larger due to the sound waves spreading out in all directions. In indoor environments, the area may be smaller if the sound waves are confined to a specific space.

By calculating the power of sound waves and dividing it by the appropriate area, the intensity of sound can be quantified. This measure provides a valuable tool for assessing the strength of sound and its potential effects in various settings, such as noise pollution or the evaluation of sound levels for human hearing safety.

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The average angular acceleration of the figure skater during the 3.0 s interval is 1.31 rad/s².

Angular acceleration is the rate at which the angular velocity of a rotating object changes with respect to time. It is a vector quantity and is defined as the time rate of change of angular velocity, usually denoted by the Greek letter alpha (α).

Angular acceleration occurs when the direction or magnitude of an object's rotational velocity changes. It is caused by a torque, which is the rotational equivalent of force, acting on the object. The greater the torque, the greater the angular acceleration.

The initial angular speed of the figure skater is given as w₁ = 4.07 rad/s and the final angular speed is w₂ = 8.0 rad/s. The time interval during which the acceleration occurs is t = 3.0 s.

The average angular acceleration during this time interval can be calculated using the formula:

average angular acceleration = (change in angular speed) / (time interval)

The change in angular speed is given by:

change in angular speed = w₂ - w₁

Substituting the given values:

change in angular speed = 8.0 rad/s - 4.07 rad/s = 3.93 rad/s

Now, dividing the change in angular speed by the time interval, we get:

average angular acceleration = (3.93 rad/s) / (3.0 s) = 1.31 rad/s²

Therefore, the average angular acceleration of the figure skater during the 3.0 s interval is 1.31 rad/s².

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The initial angular speed of the skater is 4.07 rad/s, and her final angular speed is 8.0 rad/s. She changes her angular speed from 4.07 rad/s to 8.0 rad/s over a time interval of 3.0 s.

To calculate the average angular acceleration during this time interval, we can use the formula:

average angular acceleration = (change in angular speed) / (time interval)

The change in angular speed is:

8.0 rad/s - 4.07 rad/s = 3.93 rad/s

Therefore, the average angular acceleration during the 3.0 s time interval is:

average angular acceleration = (3.93 rad/s) / (3.0 s) = 1.31 rad/s²

Therefore, the skater's average angular acceleration during the 3.0 s interval is 1.31 rad/s².

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The final velocity of the two vehicles as they move as a single mass is 18.42 m/s.

The total momentum of the two vehicles before the collision is:

momentum_initial = mass_suv ×velocity_suv + mass_car × velocity_car

The total momentum of the two vehicles after the collision is:

momentum_final = (mass_suv + mass_car) ×velocity_final

Since momentum is conserved, the initial momentum is equal to the final momentum:

momentum_initial = momentum_final

mass_suv × velocity_suv + mass_car × velocity_car = (mass_suv + mass_car) ×velocity_final

By substituting the given values, we can solve for the final velocity_final:

1217 kg * 20.8 m/s + 1087 kg * 14 m/s = (1217 kg + 1087 kg) * velocity_final

velocity_final = (1217 kg * 20.8 m/s + 1087 kg * 14 m/s) / (1217 kg + 1087 kg)

velocity_final = 18.42 m/s

The final velocity of the two vehicles as they move as a single mass is 18.42 m/s.

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A sample is given as 240 grams of Technetium-104 that undergoes radioactive decay. So, the half-life of this isotope will be equal to 52 minutes. Hence, option B is correct.

To determine the half-life of a material whose quantity is reducing or decaying, one uses the half-life formula. The rate at which a chemical degrades varies depending on how much of the substance is present.

As per the given information in the question,

N₀ = 240 grams

N(t) = 60 grams

t = 104 minutes

Use the formula of the half-life:

N(t) = N₀\((1/2)^t^/^t^(^1^/^2^)\)

Substitute the values in the above formula,

60 = 240\((0.5)^{\frac{104}{t} }\)

1/4 = \((1/2)^{104/t}\)

2 = 104/t

t = 52 seconds.

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Given that the wavelength of the wave is

The frequency of the wave is f = 3 Hz

We have to find the speed of the wave.

Let the speed of the wave is v.

The speed can be calculated by the formula,

Substituting the values, the speed of the wave will be

Thus, the speed of the wave is 6900 m/s.

The absorption of energy occurs in endothermic reactions. The correct option is D.

The type of chemical reaction that results in the absorption of energy is endothermic. In an endothermic reaction, energy is absorbed from the surroundings, resulting in an increase in the internal energy of the system.

This means that the products of the reaction have more energy than the reactants, and the reaction requires an input of energy to proceed.

Examples of endothermic reactions include the reaction of baking soda and vinegar, the melting of ice, and the reaction of ammonium nitrate and water.

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The coefficient of kinetic friction between the block and the horizontal surface is 0.207.

Given:

Mass of the block (m) = 0.337 kg

Velocity at point B (v_b) = 6.4 m/s

Distance from B to C (d) = 10 m

Let's first find the height of point B above point A:

Initial kinetic energy = 0

Potential energy at A = mgh

Potential energy at B = 0

Final kinetic energy at B = (1/2)mv_b^2

Therefore, mgh = (1/2)mv_b^2, where h is the height of point B above point A.

Solving for h, we get:

h = v_b^2/(2g) = (6.4 m/s)^2/(2*9.81 m/s^2) = 2.08 m

Now let's find the work done by friction on the block as it slides from point B to point C:

Initial kinetic energy at B = (1/2)mv_b^2

Work done by friction = force of friction x distance = μmgd

Final kinetic energy at C = 0

Using conservation of energy and the work-energy principle, we get:

(1/2)mv_b^2 - μmgd = 0

μ = v_b^2/(2gd) = (6.4 m/s)^2/(29.81 m/s^210 m) = 0.207

Therefore, the coefficient of kinetic friction between the block and the horizontal surface is 0.207.

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The angle at which the roadway should be banked depends on the speed of the car, the radius of the curve, and the frictional force. So, the roadway should be banked at an angle of approximately 25.4 degrees

In this case, we know the speed of the car (15 m/s) and the radius of the curve (50 m), but we are told that the frictional force is zero due to icy conditions.

In the absence of friction, the only force that keeps the car moving in a circular path is the normal force exerted by the road on the car. This force acts perpendicular to the road surface and is proportional to the weight of the car. To keep the car moving in a circular path, the normal force must be directed toward the center of the curve. This can be achieved by banking the road.

The angle at which the road should be banked can be calculated using the following formula:

tan θ = v^2 / (r * g)

where θ is the angle of banking, v is the speed of the car, r is the radius of the curve, and g is the acceleration due to gravity (9.8 m/s^2).

Plugging in the given values, we get:

tan θ = (15 m/s)^2 / (50 m * 9.8 m/s^2)
tan θ = 0.459
θ = tan^-1 (0.459)
θ = 25.4 degrees

Therefore, the roadway should be banked at an angle of approximately 25.4 degrees to allow cars to negotiate the curve at 15 m/s even if the roadway is icy and the frictional force is zero.

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At position (3, 9), where the tangent line passes through, Han Solo should turn off the engines (4, 15).

The first three things need to be completed, or at least started, right away: Fly the aircraft as you instantly apply full carb heat and check the gasoline in both or one of the tanks, hit the fuel boost or pump, and mix the fuel to full richness.

Finding the tangent line to the curve y = x2 at that location will help us determine when Han Solo should turn off the engines.

The derivative of the function determines the slope of the tangent line at any point on the curve y = x2.: dy/dx = 2x

Han Solo should turn off the engines at position (x1, y1). Next, we have

y1 = x1^2 (since the point is on the curve y = x^2)

dy/dx = 2x1 (since this is the slope of the tangent line at (x1, y1))

The equation of the tangent line via (4, 15) can be expressed using the point-slope form of a line as follows:

y - y1 = m(x - x1)

Substituting y1 = x1^2 and m = 2x1, we get:

y - x1^2 = 2x1(x - x1)

Now, we can substitute the coordinates of the point (4, 15) to solve for x1:

15 - x1^2 = 2x1(4 - x1)

15 - x1^2 = 8x1 - 2x1^2

x1^2 - 8x1 + 15 = 0

This quadratic equation can be factored as:

(x1 - 3)(x1 - 5) = 0

Therefore, the possible values of x1 are 3 and 5.

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Answer: (c) they are equal.

Explanation:

The normal force is equal and opposite to the weight of an object. When an object stands on a floor, the normal force is equal in magnitude to the weight of the object and acts in the upward direction. This means that the normal force on a person standing on the floor is equal in magnitude to the person's weight and acts in the upward direction, holding the person up against the force of gravity.

Answer:

Hello There!!

Explanation:

The answer is=>Conduction.

hope this helps,have a great day!!

~Pinky~

\(\huge{\textbf{\textsf{{\color{pink}{An}}{\red{sw}}{\orange{er}} {\color{yellow}{:}}}}}\)

Conduction.

Answer:

The DART mission proved to be successful. Its ultimate goal was to alter the trajectory of the asteroid Dimorphous. It was successful because the asteroid's trajectory was in fact altered. This mission is the first mission that intentionally altered the trajectory of a non man made object in space.

Answer:

6, 3, 2, 5, 4, 1

Explanation:

Let's describe them from smallest to largest. In fact the size order is not exact as there are exceptions.

An asteroid is a rocky body which lies in the asteroid belt between Mars and Jupiter. They are typically quite small object. The largest asteroid Ceres has been reclassified as a dwarf planet.

A moon is typically a rocky body which is in orbit around a planet. Some moons such as our Moon are quite large and are typically bigger than asteroid. Some moons can actually be smaller than some asteroids.

A planet is a nearly spherical body which is in orbit around the Sun. Planets are larger than moons.

A star is what planets orbit around. It is the source of light and heat. Our Sun is a star which is many times bigger than all of the planets.

A solar system is a star and all of its planets, asteroids, comets and other bodies. It is significantly bigger than a star.

A galaxy, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core. Most galaxies have a supermassive black hole at their centres.

Galaxies also form clusters which are large scale structures.

The universe is everything. It contains billions of galaxies.

Answer: 35 m/s

Explanation: Gravitational acceleration only affects the vertical component of motion meaning the horizontal component never changes. This means 35 m/s is the correct answer.

A projectile is fired horizontally at an initial horizontal speed of 35 meters per second from a height of 65 meters, after falling 25 meters, the projectile's horizontal speed is 35 m/s.

The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar number.

Speed is calculated using the formula s=d/t, where s is the speed in m.s⁻¹, d is the distance in m, and t is the time in s.

Variable speed is when an object travels a different distance at the same time intervals, whereas uniform speed is when an item travels the same distance at the same time intervals.

Therefore, after falling 25 meters, the projectile's horizontal speed is 35 m/s.

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Answer:

V= 125volts

Explanation:

R =25ohms

I = 5 amp

V = ?

t = 36seconds

V = IR

V = 5× 25

V= 125volts

Q = It

Q = 5×36

Q = 180 coulombs

Q is the amount of charge.