a rectangular coil 25 cm by 30 cm has 150 turns. this coil produces a maximum emf of 74 v when it rotates with an angular speed of 200 rad/s in a magnetic field of strength b . Find in the value b

The separation between the 5.2 kg particle and the 2.4 kg particle must be approximately 0.0135 meters for their gravitational attraction to have a magnitude of 2.3 × 10^(-12) N.

To calculate the separation between a 5.2 kg particle and a 2.4 kg particle for their gravitational attraction to have a magnitude of 2.3 × 10−12 n, we can use the formula for gravitational force:
F = G * (m1 * m2) / r^2
where F is the force of gravity, G is the gravitational constant (6.67 × 10^-11 Nm^2/kg^2), m1 and m2 are the masses of the particles, and r is the separation between them.
Rearranging the formula, we get:
r = sqrt(G * (m1 * m2) / F)
Plugging in the values given in the question, we get:
r = sqrt(6.67E-11 * (5.2 * 2.4) / 2.3E-12)
r = 0.0067 meters or 6.7 millimeters (rounded to two significant figures)
Therefore, the separation between the 5.2 kg and 2.4 kg particles must be 6.7 millimeters for their gravitational attraction to have a magnitude of 2.3 × 10−12 N.

To find the separation between the 5.2 kg particle and the 2.4 kg particle, we can use Newton's law of universal gravitation: F = G * (m1 * m2) / r^2
Here, F is the gravitational force (2.3 × 10^(-12) N), G is the gravitational constant (6.674 × 10^(-11) N * m^2/kg^2), m1 is the mass of the first particle (5.2 kg), m2 is the mass of the second particle (2.4 kg), and r is the separation between the particles.
We can rearrange the formula to solve for r:
r = sqrt((G * m1 * m2) / F)
Now, substitute the given values:
r = sqrt((6.674 × 10^(-11) N * m^2/kg^2) * (5.2 kg) * (2.4 kg) / (2.3 × 10^(-12) N))
After calculating, we get:
r ≈ 0.0135 meters

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The event that marks the end of a star's evolutionary life before becoming a white dwarf is a planetary nebula. So, option E is correct.

A planetary nebula is characterized by cosmic rays of gas and dust surrounding a dying star. This dying star becomes a white dwarf after the complete depletion of hydrogen in the core.

It gets its name from a scientist who described the gases to be looking like two planets around a dying star. Thus, it's called planetary nebulae. This marks the final stage of a dying star that becomes a white dwarf. It consists of the outer layers of the star.

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Answer: D

Explanation:

If X has the discrete topology, then every subset of X is open. This implies that for any two points x and y in X, there exist disjoint open sets U and V such that x∈U and y∈V. Therefore, X is totally disconnected. The converse does not hold. For example, the rational numbers Q with the subspace topology inherited from the real numbers R is totally disconnected, but it does not have the discrete topology.

The definition of a totally disconnected space is that its only connected subspaces are one-point sets. If X has the discrete topology, then every subset of X is open. This implies that for any two points x and y in X, there exist disjoint open sets U and V such that x∈U and y∈V. Therefore, X is totally disconnected.The converse does not hold. For example, the rational numbers Q with the subspace topology inherited from the real numbers R is totally disconnected, but it does not have the discrete topology. This is because there exist subsets of Q that are not open in the subspace topology, such as the set of rational numbers between 0 and 1.

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The correct statements from the list are:

Gravity causes molecular clouds to contract.

Gas will heat up as it collapses.

Stars are born from the gas and dust of the interstellar medium.

Explanation:

Molecular clouds are massive structures of gas and dust that are gravitationally bound. Gravity is the force that causes the contraction of the cloud, leading to the formation of stars.

As the molecular cloud contracts due to gravity, the gas and dust particles collide with each other and lose potential energy, which gets converted into heat. This heating process increases the temperature of the cloud and can lead to the formation of a protostar.

Stars are born from the gas and dust of the interstellar medium through the process of gravitational collapse. As the molecular cloud collapses, it forms a protostar that eventually becomes a star.

Protostars are not observable at visible wavelengths because they are embedded in dense clouds of gas and dust. However, they can be detected at infrared wavelengths, where the heat radiation from the protostar and its surrounding disk is more prominent.

The process of star formation is a continuous process that can take millions of years. There is ample evidence to support this idea, including the observation of protostars, young stars, and star clusters at various stages of evolution.

Most protostars can be detected by the jets of gas they emit, known as bipolar outflows. These outflows are generated by the accretion of material onto the protostar, which creates a high-velocity stream of gas that is ejected from the star's poles.

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Answer:

Explanation:

Vector quantities are those quantities which needs both magnitude and direction for their description.

Here, in all the options except option B, there is no direction. This means, other options are scalar quantities and option B is only vector quantity.

Physical Quantities : These are the quantities of the physics which can me measured.

There are two types of physical quantities,

Vector quantities are those quantities which needs both magnitude and direction for their description. Example : Velocity, acceleration etc.

Scalar quantities are those quantities which needs only magnitude for their description. Example : Speed , distance etc.

Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion. Solvent density: As the density of a solvent increases, the rate of diffusion decreases.

Answer:

Osteologists are trained to read and translate a bone's story.

Explanation:

This rare skill provides information that helps us better understand ancient cultures, solve mysteries, and learn about animals. Being an Osteologist means you have a variety of job opportunities.

235u 1n→151la + 88Kr + 3 1n

28si + 4He → 32s + 1n

140ce → 4He + 136ba



In the first reaction, a neutron (1n) is absorbed by Uranium-235 (235u), which results in the formation of Lanthanum-151 (151la), Krypton-88 (88Kr), and three additional neutrons (1n). This is an example of nuclear fission, where the nucleus of a heavy atom is split into smaller nuclei.

In the second reaction, Silicon-28 (28si) and Helium-4 (4He) combine to form Sulphur-32 (32s) and a neutron (1n). This is an example of nuclear fusion, where two lighter nuclei combine to form a heavier nucleus.

In the third reaction, Cerium-140 (140ce) decays into Helium-4 (4He) and Barium-136 (136ba). This is an example of nuclear decay, where an unstable nucleus loses energy by emitting particles or radiation.

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Answer:

Speed is the measure of how fast something moves

Explanation:

Answer:

V=u + at

V= final velocity

U= Initial velocity

a= acceleration

t= time taken

V= 5 + 30*2

V=5+60

V=65m/s

Explanation:

Answer:

i had a different thing and i finished mine so i thought id try my best to help

Explanation:

So i had to write about something that motivated me

looking at myself in the mirror and hating how i looked. i was okay with that at first but when others around me started calling me over weight or "chubby" it go to me. and its motivated me to work out. ill fall behind and stop but then i just think about how that made me feel and i just work harder.

Thats what i had wrote

I really hope this is helpful to someone

Answer:

I’m motivated to go to college after high school for many reasons, both extrinsic and intrinsic. I’ve always enjoyed studying literature, cultural studies, and human behavior, which is why I’m looking at colleges that offer a literature program where I can major in global cultural studies and minor in psychology or sociology. This acts as an intrinsic motivator for me because I enjoy studying these subjects. Also, I want to pursue a career as a novelist, which acts as an extrinsic motivation in my decision to go to college.

Explanation:

PLATO answer

Answer:

Argon is the third most abundant gas in our atmosphere, making up about one percent in terms of moles of gas.

Explanation:

Roughly, our atmosphere is 78% nitrogen, 21% oxygen, 1% argon, and trace amounts of many other gases plus variable amounts of water vapor.

Answer:

55 km

pls give brainliest hope it help

Explanation:

The wavelength of each gamma ray photon would be 1.22 x 10⁻¹¹ meters.

We need to use the equation E = hc/λ, where E is the energy of the gamma ray photon, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon.

The total energy from the annihilation is given by E = mc², where m is the mass of the particle and antiparticle that annihilated each other. Since the question doesn't specify which particles were involved in the annihilation, we can't calculate m directly. However, we do know that all of the energy was carried away by two gamma ray photons.

Therefore, we can say that each photon has an energy of E/2. Plugging this into the equation above, we get:

E/2 = hc/λ

Rearranging, we get:

λ = 2hc/E

To calculate the wavelength, we need to know the energy of the photons. If we assume that the annihilation involved an electron and positron (the most common type of annihilation), then m = 9.11 x 10⁻³¹ kg (the mass of an electron), and E = 2mc² = 1.02 x 10⁻¹³ J.

Plugging this into the equation above, we get:

λ = 2hc/E = 2 x 6.63 x 10⁻³⁴ J s x 3 x 10⁸ m/s / 1.02 x 10⁻¹³J = 1.22 x 10⁻¹¹ m

Therefore, the wavelength of each gamma ray photon would be 1.22 x 10⁻¹¹ meters.

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The velocity of the balls after collision is 0.33m/s and the loss in kinetic energy is 0.126J

Inelastic collision occur when only the momentum is conserved but there is loss in kinetic Energy.

This means that the momentum before collision is equal to the momentum after collision.

therefore m1v1+(-m2v2) = (m1+m2)v . where v is the common velocity after collision. The negative sign shows that they are moving in opposite direction.

m1= 30g = 0.03kg

m2 = 15g = 0.015kg

v1 = 2m/s

v2 = 3m/s

0.03× 2- 0.015× 3= (0.03+0.015)v

0.06-0.045= 0.045v

0.015= 0.045v

divide both sides by 0.045

v = 0.015/0.045

v= 0.33m/s

the kinetic energy before collision = ½×0.03×2²+½×0.015×3²

= 0.06+0.068= 0.128J

kinetic energy after collision = ½× 0.045× 0.33² = 0.0025J

loss in kinetic energy= 0.128J -0.0025J = 0.126J

therefore the The velocity of the balls after collision is 0.33m/s and the loss in kinetic energy is 0.126J

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Answer:

C

Explanation:

please mark as brainliest

Friction is the force that acts on the opposite side of direction of force, thus it manages to decelerate an object, so it acts upward along the plane

The sounds emitting from Ross' car can be characterized as low frequency, high amplitude.

The question states that pedestrians often stare at Ross' car due to the loud, low-pitched booming sound they hear. From this description, we can infer certain characteristics of the sound.

Low frequency refers to sounds with a lower pitch, such as deep bass notes. These low-pitched sounds are associated with lower frequencies on the sound spectrum.

High amplitude refers to the intensity or loudness of the sound. When a sound is described as loud, it indicates a high amplitude or a greater magnitude of sound waves.

Therefore, the sounds emitting from Ross' car can be characterized as low frequency (low-pitched) and high amplitude (loud). This combination of characteristics results in the loud, low-pitched booming sound that draws the attention of pedestrians.

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Answer:

The correct answer is D)

Explanation:

When an electric magnet is brought near a cord with an electric current, the cord will most likely deflect away from the magnet because electric fields flowing through a wire generates its own magnetic field.

Cheers!

Answer:

To describe motion accurately and completely, a frame of reference is necessary. frame of reference ( or reference frame) consists of an abstract coordinate system and the set of physical reference points that uniquely fix ( locate and orient ) the coordinate system and standardize measurements within that frame.

Explanation:

The different observations occur because the two observers are in different frames of reference. A frame of reference is a set of coordinates that can be used to determine positions and velocities of objects in that frame; different frames of reference move relative to one another.

The exponential form of the given number is (-7)⁴. 6⁵.

Exponent is the term used to describe a way to represent huge numbers using powers. In other words, the exponent describes how many times a number has been multiplied by itself.

A number that appears as a superscript over another number is the exponent. In other words, it means that the base has been elevated to a particular level of power. Other names for the exponent are index and power. mn indicates that m has been multiplied by itself n times if m is a positive number and n is its exponent which can be said as the m raised to n.

The given numbers are,

(-7) . (-7) . (-7) . (-7) . 6. 6 . 6 . 6 . 6

So, 7 is multiplied by itself 4 times and 6 is multiplied by itself 5 times.

Therefore, it can be written in the exponential form as,

(-7)⁴. 6⁵

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Answer:

Explanation:

If the mass hangs at the end of the string and the string can support the mass and doesn't break, and the mass hangs still, that means that the tension in the string is equal to the downward pull of the mass. However, we are given the tension in Newtons and the mass needs to be in kg. So we use the equation for weight:

w = mg where w, the weight, is the same as the tension in the string. Gravity is always 9.8 in the metric system:

4.75 = m(9.8) so

m = .48 kg

Answer:

Answer: A

0.485 Kg

Explanation:

Answer:

The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense.

Explanation:

The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph.

Gravity and wind speed are vector quantity , Temperature , Volume , Number of pages in a book are the scalar quantity

In terms of their size and direction, the physical quantities may be divided into scalars and vectors.The examples of physical quantities that can be sort into vectors and scalars are temperature, gravity, volume, number of pages in a book, wind speed and direction, etc.

The following quantities are:

Temperature- The temperature is a scalar number since it just needs the magnitude (heat content) and not the direction.

Gravity - It is comparable to the force with which the Earth pulls an item that is always pointed toward its center. The amount is a vector since both magnitude and direction define it.

Volume - it is the pitch of a sound wave which is nothing but a form of energy which causes the sensation of hearing. Since the direction is not required to measure a sound level (determined by the corresponding frequency of the sound wave) but the only magnitude, therefore, it is a scalar.

The amount is a scalar since the number of pages in a book is entirely determined by a numerical value without the requirement for a direction.

Wind Speed and Direction - Since both the wind's magnitude in terms of speed and direction are necessary, the quantity is a vector.

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In todays modern word modern scientists measure and calculate the speed at which the continents are moving using the Global Positioning System (GPS).

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Answer:

V1 = 15m/s[45o E of N.] = 45o N. of E.

V2 = 18m/s[5o N. of E.].

Vr = 15m/s[45o] + 18m/s[5o].

Vr = 15*Cos45+15*sin45 + 18*Cos5+18*sin5.

Vr = (10.61+10.61i) + (17.93+1.57i) = 28.54 + 12.18i.

Magnitude = sqrt(28.54^2 + 12.18^2) =

Tan A = Y/X = 12.18/28.54 = 0.42887. A =

0  2

posted by Henry

Apr 8, 2017

31 m/s

23 ° north of east

Explanation:

Answer:

It takes the rock t = 3.98 seconds to reach 3 meters from ground level

Explanation:

We need to set the kinematic equation for the vertical position of this motion in one direction with the zero (reference level) at ground level. So, the initial position of the rock is at positive 25 meters, and we need to find the time it takes to reach positive 3 meters.

Recall as well that the only acting acceleration is that due to gravity (g = 9.8 m/s^2) opposed to the object's initial velocity (Vi = 14 m/s). Then the position equation becomes:

\(y_f=y_i+v_i\,t-\frac{1}{2} \,9.8 \,t^2\\3 = 25 + 14\,t-4.9\,t^2\\4.9\,t^2-14\,t-22=0\)

and we need to solve for "t" using the quadratic formula:

\(t=\frac{14+/-\sqrt{(-14)^2-4\,(4.9)(-22)} }{9.8} \\t=3.984 \,\,\,\, or\,\,\,\, t=-1.127\)

Since we are looking for a positive value for time, starting when the rock is launched, we select the positive answer, which should come in seconds:

t = 3.98 seconds

(rounded to two decimals as requested)

Answer:

It takes the rock t = 3.98 seconds to reach 3 meters from ground level

Explanation:

The force of the impact is 8 N (Newtons).

What is the force of impact and What is it unit?

The force of impact is the force that is generated when two objects collide. It is typically measured in units of force (such as Newtons) and is a function of the mass of the objects, the speed of the objects, and the distance between them when they collide, and is typically measured in Newtons (N).

The force of the impact can be calculated using the formula:

F = ma

Where m is the mass of the softball (0.2 kg) and a is the acceleration (change in velocity over time).

The acceleration can be calculated using the equation:

a = Δv / Δt

Where Δv is the change in velocity (final velocity - initial velocity) and Δt is the change in time.

In this case, the initial velocity is 32 m/s, the final velocity is 0 m/s and the change in time is 0.8 s, so:

a = (0 - 32) / 0.8 s = -40 m/s^2

Therefore, the force of the impact can be calculated as:

F = m * a = 0.2 kg * (-40 m/s^2) = 8 N (Newtons)

Therefore, 8 N (Newtons) is the correct answer.

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Answer:

The new pressure will be 12 atm