The books on the bottom shelf experience more gravity than the books on top, because they are closer to the ground.
A True
B False

The distance separating these two charges is 2.3 m. Hence, option (B) is correct.

Electric force is the attracting or repulsive interaction between any two charged particles.

Given that: the two charges are 2.4 × 10^-6 C and -4.1 × 10^-6 C.

Force experienced by it =  1.7 × 10^-2 N.

Let the distance between them = r, then

F = kQq/r²

1.7 × 10^-2  = {9×10^9×2.4 × 10^-6×4.1 × 10^-6 }/r^2

r =√[ {9×10^9×2.4 × 10^-6×4.1 × 10^-6 }/ 1.7 × 10^-2  ]

=2.3 m.

Hence, the distance between two charges is 2.3 m.

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The speed of car A after the collision is 0.52 m/s.

In everyday use and kinematics, the speed of object is the amount of change in position over time, or the amount of change in position per unit time. So it's a scalar quantity.

For a bumper car A

Mass (m₁) = 296 kg

Velocity (V₁) = 3.74 m/s,

For a bumper car B

Mass (m₂) = 222 kg

Velocity (V₂) = 1.85 m/s,

To calculate velocity of car A after the collision mathematically:

Vₙ =(m₁-m₂/m₁+m₂)V₁

Vₙ = Final velocity of car A

Vₙ = (296 - 222/296 + 222) × 3.74

Vₙ = 0.52 m/s

Hence, the velocity of car A after the collision

Vₙ = 0.52 m/s

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The hollow sphere would be the easiest to stop from rotating. The body's moment of inertia and angular velocity combine to form the angular momentum: L=I ω

I = (2/5)MR2 (solid) and I = (2/3)MR2 (hollow) are the moments of inertia for spheres of any diameter that are solid and hollow, respectively (hollow)

A HOLLOW sphere has a higher angular momentum than a solid sphere with the same mass and rotational velocity because (2/3)>(2/5).

If they were the same size and made of the same material, the solid sphere would, intuitively, have a higher angular momentum (and therefore different mass). To illustrate this, consider a hollow sphere with a wall thickness of R. Its volume is thus Vol=4R2R.

Since M=V and is the density, I(hollow)=(8/3)R4R is the moment of inertia.

I(solid) = ρ(8π/15)R^5

hence, I (solid)/I (hollow)

=(1/5)R/∆R

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Saturn's atmosphere is substantially less active than Jupiter's because it is twice as far away from the sun.

how many moons are there for saturn ?

Saturn's moons are many and diverse, ranging from small moonlets barely tens of metres wide to Titan, which is bigger than Mercury. Saturn has 83 verified moons with proven orbits that are not contained in its rings, with just 13 having diameters more than 50 kilometres, as well as thick rings with millions of embedded moonlets and uncountable smaller ring particles. Only one or two of Saturn's moons, Titan and maybe Rhea, are massive enough to have collapsed into a relaxed, ellipsoidal form. Titan, the second-largest moon in the Solar System (after Jupiter's Ganymede), has a nitrogen-rich Earth-like atmosphere and a terrain that includes dry river networks.

Smaller moons "shepherd" or retain particles in their rings in the ring system.

Saturn's atmosphere is substantially less active than Jupiter's because it is twice as far away from the sun.

Saturn's rings are largely comprised of ice particles.

Saturn is not the only planet with a ring system, despite being the most extensive.

Some ring particles are miniature moons separated by tidal forces.

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The correct answer choice which is correct about the description of a neutral posture from above is: A boy sitting on an examination chair whose knees are at the same height.

The correct answer choice is option a.

Neutral posture can simply be defined as that position which an individual is that he or she finds comfort in and that can be in that position for a prolonged time. However, the part of the mammalian brain which controls our body postures is known as what we call the cerebellum.

From the context of the task, the body is sitting on a chair with his two knees at the same height is a neutral posture because he will be eased and comfortable to be in this position for a long while.

So therefore, we can now deduce from all said and done above that good posture helps us to maintain balance.

Complete question:

Which of the following would be included in a neutral posture:

a. A boy sitting on an examination chair whose knees are at the same height

b. An examiner sitting on a chair whose knees are at heights far above each other apart

c. A man standing on the stairs whose elbows are lifted upward for long

d. None of the above.

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Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

How do digital signals work?

An established or one that represents data as a step made up of discrete values is known as a digital signal. There is no noise produced by digital signals. Electronic signals sent as pulses are used to transmit digital signals to computers. These signals can be found in things like digital phones and computers.

Because digital signals are used to transport data to and from the cloud, it should be noted that videos are said to stream from the cloud to a computer without quality degradation.

Videos can be streamed from the cloud to a computer with no loss in quality because Digital signals are used to transmit data to and from the cloud.

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The approximate value of velocity at point M will be 15 m/s if the mass of the pendulum is 0.1 kg.

The energy that an object possesses as a result of its motion or position is known as mechanical energy. Kinetic energy, or the energy of motion, and potential energy are two types of mechanical energy (stored energy of position).

According to the question, total mechanical energy of the pendulum at point A = 10 J.

Let the velocity of the pendulum at point M be v.

Then

kinetic energy at point M = total mechanical energy at point A

⇒ 1/2 × 0.1 × v² = 10

⇒ v² = 200

⇒ v = 10√2 = 15 (approx.)

Hence,  the approximate value of velocity at point M  will be 15 m/s.

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Answer:

Hope this helps!

Explanation:

The time elapsed before the cannon ball strikes the ground can be found by using the equation for kinematic vertical motion,

t = (2*d)/g

Where d is the vertical distance and g is the acceleration due to gravity (9.8 m/s^2).

t = (2*61)/9.8

t = 12.24 seconds

The time elapsed is 12.24 seconds, rounded to the nearest hundredth is 12.24 seconds.

"Saturn has the strongest magnetic field among all planets in our solar system," statement is incorrect.

A magnetic field, a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. When a charge moves through a magnetic field, a force that is perpendicular to both its own velocity and the magnetic field operates on it.

The magnetosphere, a massive magnetic bubble formed by forces deep inside Saturn, has a significant impact on the space environment close to the planet. Deep within the planet's fluid innards, material cycles produce Saturn's magnetic field.

The solar wind, or flow of electrically charged solar particles (electrons and ions), travels across the solar system at a million miles per hour beyond Saturn's magnetosphere. The magnetosphere of Saturn develops when the solar wind collides with its own magnetic field. The magnetic forces of the sun are strongest outside the planet's magnetosphere, while Saturn's magnetic fields are strongest inside the planet's protective envelope.

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Answer:

If there is no friction then energy is conserved. There are two parts in this case, potential energy and kinetic energy. The object starts out with no kinetic energy and potential energy of PE = mgh where m is the mass, g is acceleration due to gravity and h is its initial height above the ground.

Explanation:

a) q = 28.57 cm ,  b)   h ’=  -0.114 cm  the image is inverted and REAL

Because light can come from an item in many different directions, a picture can be created. According to the rule of reflection, some of the light (which we depict as rays) hits the screen and reflected off of it.

Briefing:

For this exercise we will use the equation of the constructor

         1 / f = 1 / p + 1 / q

where f is the focal length of the salad bowl, p and q are the distance to the object and the image

The metal salad bowl behaves like a mirror, so its focal length is

          f = R / 2

          f =36/2

          f = 18 cm

a) Suppose that the distance to the object is p = 50 cm, let's find the distance to the image

          1 / q = 1 / f  - 1 / p

          1 / q = 1/18 - 1/50

          1 / q = 0.035

           q =28.57 cm

b) to calculate the size of the image we use the equation of magnification

          m = h’/ h = - q / p

           h ’= - q / p h

           h ’= - 28.57 / 50×5

           h ’= -0.114 cm

The negative sign means that the image is inverted

As the rays of light pass through the image this is REAL.

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Pluto’s brightness relative to the sun is 4.46×10^-7 if Pluto’s radius is 1120 km.

Albedo, which ranges from 0 (a black body that absorbs all incident radiation) to 1, (a body that reflects all incident radiation), is a measurement of the diffuse reflection of solar radiation out of the total solar radiation.

Given that  albedo of Pluto = 0.5.

Pluto’s radius: R =  1120 km.

Hence, Pluto’s brightness relative to the sun = albedo /(radius)²

= 0.5/(1120×10^3)

= 4.46×10^-7.

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You need to make your pendulum slightly longer

What is a pendulum?

A pendulum is a body suspended from a fixed point so that it can swing back and forth under the influence of gravity. The time interval of a pendulum's complete back-and-forth movement is constant.

Your pendulum does a complete swing in 1.9 seconds.  You want to SLOW IT DOWN so it takes 2.0 seconds.

Longer pendulums swing slower.

You need to make your pendulum slightly longer

If your pendulum is hanging by a thread or a thin string, then its speed doesn't depend at all on the weight at the bottom. You can add weight or cut some off, and it won't change the speed a bit.  

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Weight of a body is defined as the force with which it is attached to the earth.

mass is the total quantity of matter present.

the weight of something is given as mass * acceleration

weight of an object is directly proportional to the mass of the object.  so, if mass doubles, weight will also double.

hope this helps :)

- jeron

The force on the larger piston of cross-sectional area 230 cm² is 11500 N.

Force can be defined as the product of mass and acceleration.

To calculate the force on the larger piston, we use the formula below.

Formula:

Where:

From the question,

Given:

Susbtitute these values into equation 1

Hence, the force on the larger piston is 11500 N.

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About two-thirds of the nearest spiral galaxies display a central bulge with a bar of stars in the middle rather than a circular central bulge.

What is Spiral Galaxies?

The twisted clusters of stars and gas known as spiral galaxies, which are frequently formed of hot, young stars, have striking shapes. As opposed to the other two major groups of galaxy forms, elliptical and irregular, spiral galaxies make up the majority of the galaxies that astronomers have so far discovered.

A spiral galaxy is one that contains Earth and our solar system, such as the Milky Way.

The majority of spiral galaxies have a flat, spinning disc of stars around a central bulge. Older, fainter stars make up the bulge in the centre, which is thought to house a supermassive black hole. A bar structure runs through the core of almost two-thirds of spiral galaxies, including the Milky Way.

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C is the finest statement to describe the Coriolis effect. The apparent route of ocean currents curves due to the rotation of the Earth.

What is the effect of Coriolis?

This is an evident force, relative to the earth's surface, that causes moving things to the right within the Northern Hemisphere and to the left within the Southern Hemisphere as a result of the earth's rotation.

The Coriolis effect is an apparent force, relative to the earth's surface, that causes moving objects to deflect to the right within the Northern Hemisphere and to the left within the Southern Hemisphere as a result of the earth's rotation.

C is the finest statement to describe the Coriolis effect. The apparent route of ocean currents curves due to the rotation of the Earth.

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An egg is attached to a parachute and dropped from a height of 16 meters, after hitting the ground the egg will crack. Hence, option A is correct.

A moving object's speed and orientation vary over time at a certain rate, which is known as acceleration. An object or location is considered to be accelerated when it moves more quickly or more slowly in a straight path.

A circle's motion increases despite its constant speed because its direction is always changing. For all other motions, by and also to acceleration is used.

Because of its magnitude and direction, it is a vector quantity.

As per the given information in the question,

The egg is attached to a parachute.

The dropping height of the egg is 16 m.

The given velocity is 0.8 m/s.

When the egg will strike the ground with minimal velocity doesn't matter it will break anyway because the out shell of the egg is very smooth or soft and every soft strike will lead to the breaking of the egg.

Then the egg will crack after hitting the ground.

Hence, option A is correct.

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The net work done on the baseball to bring it to rest is -130.953 J or approximately 131 J. The negative sign indicates that the force has been applied opposite to the direction of motion of the baseball.

The work-kinetic energy theorem states that an object's change in kinetic energy is equivalent to the work that has been done on it.

[tex]W_{net} = KE_{f} -KE_{i}[/tex]

Here,

[tex]W_{net}[/tex] = Net work done

[tex]KE_{f}[/tex] = Final Kinetic Energy

[tex]KE_{i}[/tex] = Initial Kinetic Energy

We know,

[tex]KE = \frac{1}{2} mv^{2}[/tex]

Here, m = Mass of the object

v = velocity of the object

Now,

[tex]W_{net} = KE_{f} -KE_{i}\\W_{net}= \frac{1}{2} mv^{2}_{f} - \frac{1}{2} mv^{2}_{i}[/tex]

Given,

Mass of baseball (m) = 145g = 0.145 kg

Initial velocity ([tex]v_{i}[/tex]) = 42.5 m/s

Final velocity ([tex]v_{f}[/tex]) = 0 m/s  (since, the baseball comes to rest.)

Inserting these values in the above equation we get,

[tex]W_{net}= \frac{1}{2} mv^{2}_{f} - \frac{1}{2} mv^{2}_{i}\\ = 0- \frac{1}{2} *0.145*42.5*42.5 \\= -130.953[/tex]

Hence, the net work done on the baseball to bring it to rest is -130.953 J or approximately 131 J.

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(a) The height above point A will be the tray when the metal ball leaves the tray is 29.24 cm.

(b) The total time elapses between releasing the system at point A and the ball leaving the tray is 0.09 seconds.

(c) The speed of the ball moving just as it leaves the tray is 1.16 m/s.

A) F= gx

ma=gx

(2.295)(9.8)=190x

X= 11.84 cm

B) h= 11.84+17.4 = 29.24 cm

Y=Acos√kt/m-0

T= 0.09s

C) ½ mv² + ½ ky² = ½ kA²

v² = 1.16m/s

What is speed?

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Energy and angluar momentum quantity is conserved for plant orbiting a star in a circular orbit.

Energy is ability to do the work.scientist defines energy as the ability to do work.

Energy and angular momentum, arter all other factors- change.

In the Earth-Satellite system, a gravitational force acts to the  join the two bodies. Thus, there is no torque due by  to gravitational force. Hence, the angular velocity is conserved.

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Answer:

the ticket collector is moving at 2.00 mi/h in the same direction, the relative speed of the ticket collector to the person on the train is 65.0 mi/h - 2.0 mi/h = 63.0 mi/h.

Explanation:

From the point of view of a person on the train, the ticket collector is moving at a speed of 63.0 mi/h. To determine this, we need to subtract the speed of the train from the speed of the ticket collector in the same direction. Since the train is moving at 65.0 mi/h

Answer:

The third structure is a bent geometry of a molecule as it consists of one atom of B(boron)and 3 atoms of Cl(chlorine) linked to the atom of and the bond angle is 120°

Answer:

The first one.

Explanation:

The value of the momentum on the second cart is p₂ = v₂m₂ = 2vm.

Momentum is defined in Newtonian mechanics as the product of an object's mass and velocity. It is a vector quantity with magnitude and direction. If an object's mass is m and its velocity is v,

Given that consider two carts, of masses m and 2m, at rest on an air track. if you first push one cart for 3 s and then the other for the same length of time, exerting equal force on each.

The momentum on the second cart will be calculated as,

F = m₁ a₁ = m₂ a₂

if m₁ = m and m₂ = 2m :

F = ma₁ = 2m  a₂ ⇒ a₁ = 2 a₂

Since v = at + v₀  with t = 3, v₀ = 0 ⇒ v = 3a:

v₁ = 2 v₂

Since p = vm with v₁ = 2v and v₂ = v :

p₂ = v₂m₂ = 2vm

Therefore, the value of the momentum on the second cart is p₂ = v₂m₂ = 2vm.

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The force exerted by the insect and the automobile is equal and opposite, according to Newton's law.

What exactly is acceleration?

In physics, acceleration is defined as the rate of change in velocity. As a result, the unit is m/s2. According to Newton's second equation of motion, the force acting on a moving body is the product of its mass and acceleration.

As a result, F= ma an implies that the acceleration is inversely proportional to the mass. As a result, a body with more mass will have less acceleration but more force.

An action has an equal and opposite response, according to the third law of motion. Thus, the force exerted by the bug on the car and the force exerted by the car on the bug are equal and opposite, with the bug accelerating faster due to its lower mass.

The force exerted by the insect and the automobile is equal and opposite, according to Newton's law. As a result, their acceleration reduces as their mass grows. As a result, the bug's acceleration will be greater than that of the automobile.

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This value is close to the experimental value of approx. 1011 A/m2

Super conductivity, or current flow with zero electric resistance, is the ability to conduct electricity without suffering energy losses.

The superconductivity is quenched when current through the wire causes the critical magnetic field at the wire surface.

Given that,

B = 0.2T

R = 0.001m (R = r/2)

a. Maximum current, critical current density

Ic = B*2πr / μo

Ic = {0.2 * 2 * (22/7) * (0.001/2)} / 4 * (22/7) * 10-7

Ic = 500A

Thus, maximum current Jc=Ic/A = 6.363 * 108 A/m2

It turns out that the critical current density for TYPE I superconductors is indeed in the range of this magnitude. The superconductivity is destroyed by a current that produces a field on the conductor surface that is equivalent to B.

b. Type II superconductor, Nb3Sn

Critical field is the upper critical field, B2

Ic = B*2πr / μo

Given that, B = 24.5T,   Thickness = 0.001m

 Ic = {24.5 * 2 * π * (0.001/2)} / 4 * π *10-7

 Ic = 61250A

Thus, Maximum Current Jc= Ic/A = 7.795 * 1010 A/m2

This value is close to the experimental value of approx. 1011 A/m2

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The voltage across the capacitor is VC=qC since the formula for capacitance is C=q/V. Ohm's law states that the current is defined as I=dq/dt and the potential drop across the resistor is VR=IR.

What happens when a capacitor and a resistor are connected in series?

A series connection between a resistor and a capacitor creates an RC circuit, which charges the capacitor progressively through the resistor until the voltage across it equals the supply voltage. The time needed to fully charge the capacitor is about equal to 5 time constants, or 5T.

How can a capacitor with a resistor issue be fixed?

Simply use V=IR, where V is the battery voltage and R is the resistor resistance, to determine the current flowing through the circuit, and then solve for I. When the capacitor is finished charging, the current has progressively decreased and is getting close to zero.

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The depth in the lake of pressure 173.693 lb/in² is 122.45 m.

Depth is the distance down either from the top of something to the bottom, or to a distance below the top surface of something.

To calculate the depth in the lake, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values in to equation 1

Hence, the depth in the lake is 122.45 m.

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Answer: 9.81(2)=19.62N

Explanation: