stellar equillibrium is a balance netween what two things

Answer:

Time:

t = 12 s

Explanation:

Given:

g = 1.62 m/s

H = 120 m

V₀ =0 m/s

__________

t - ?

From the formula:

H = V₀·t + g·t² / 2

H = g·t² / 2

we find the time:

t = √ (2·H / g)

t = √ (2·120 / 1.62) ≈ 12 c

The average velocity of the object in the first 5 seconds is 4 m/s.

The average velocity of an object can e defined as the average of the velocities of the object throughout its motion.

Average velocity can also be defined as the ratio of the total displacement of the object and the total time taken.

Considering the given object:

total displacement in the first 5 seconds = 40 m

time taken = 5 seconds

Average velocity = 40 m / 5 seconds

Average velocity = 4 m/s

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The rock will take 3.5 seconds to reach the bottom when dropped off a 60 m high cliff. Therefore, option (C) is correct.

The equations of motion are equations that are used to describe the motion of an object as a function of time. These equations apply to an object moving linearly in a straight line with uniform acceleration.

The three equations of motion are represented as:

[tex]v = u+at[/tex]

[tex]S= ut +\frac{1}{2} at^2[/tex]

[tex]v^2= u^2+2aS[/tex]

The initial velocity of the rock, u = 0

The acceleration of the rock, a= g = 9.8m/s²

The height that rock travel, S = 60m

From the equation of motion calculate the final velocity of the rock:

v² = (0)² + 2 ×9.8×60

v² = 1176

v = 34.29 m/s

From the equation of motion, calculate the time takes the rock to reach the bottom:

v = u+at

34.29 = (0) + (9.8) (t)

t = 3.5 sec

Therefore, the rock will take 3.5 seconds to reach the bottom.

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The magnetic domains in an unmagnetized nail are oriented at random, which causes the net magnetism to sum to zero. Many of the magnetic domains in a magnetized nail are aligned.

A magnetized iron nail has aligned domains, while an unmagnetized iron nail has domains that are orientated arbitrarily.

The material will be drawn to a magnet in its unmagnetized state but won't function as a magnet. In other words, two ferromagnetic materials that are not magnetically attracted to one another will not attract one another.

Iron becomes magnetized when it is exposed to a magnetic field because the atoms start to align their electrons with the magnetic field's direction. The two magnetic objects then become attracted to one another as a result of this.

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Answer:

Explanation:

the street and the clouds

compared to a giant iceberg, a hot coffee cup has a higher temperature but low internal energy.

The temperature of a hot cup of coffee is higher because the average kinetic energy of the molecules of hot coffee are higher than the molecules of a giant ice cap. If we put a thermometer in both, we would clearly see the difference.

Despite having a higher temperature, hot coffee has lower internal energy as compared to icebergs because the giant iceberg contains a lot of particles whose combined energy will make the total internal energy of the iceberg much larger than the hot coffee cup.

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Let's use the formula of power.

Where P = 48 watts and V is 12 volts, let's use these magnitudes and solve for I.

Divide both sides by 12V.

The diameter is 16 cm.

To formulate the relationship between diameter and mass it is essential to know the relationship between mass volume, and density. Since mass m = density volume is directly proportional to the diameter. The relationship between mass and diameter is given by The weight of an object on earth is directly proportional to the mass of the earth and inversely proportional to the square of the radius of the earth.

We know that the center of mass lies on the axis of symmetry. Since a sphere is a single figure the center of mass is where one axis of symmetry intersects another. The relationship between the weight of an object and the radius of that object is that if the radius is greater then the force acting on the object is large and if the radius is small the force acting on the object is small.

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Answer:

2.94 sec

Explanation:

Horizontal component of velocity =  29.8 cos 29°

  Rate * time = distance

    29.8 cos 29   *   t   =  76.7687 m

              t = 2.94 sec

A body is pulled along horizontal plane by a constant force of 10N applied pavement to the plane. The work done in moving a distance 20m is (W)= 200 J.

When some amount of force is acted on the object and it moves some distance that means some work has been done on the object. It can be measured in Joule.

To calculate the work done we are using the formula here is,

W=Fd

We are given here,

F= The amount of force acting on the body. = 10N

d= The distance the object move. = 20m

We have to calculate the values of work done = W

Now we put the values in the equation we get,

W= Fd

Or, W= 10*20

Or, W= 200N

From the calculation we can say that, The work done in moving a distance 20m is (W)= 200 J.

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A body is pulled along horizontal plane by a constant force of 10N applied pavement to the plane. calculate work done in moving a distance 20m

Answer:

m is the mass of the sample, C is the specific heat, and T is the temperature

Explanation:

khan academy

An object with mass attracts another object with mass; the magnitude of the force is directly proportional to the masses of the two objects and inversely proportional to the square of the distance between the two objects.

The percentage of Weight change =( 140-32.56) / 140  X100

                                     = 76.74 %.

F = force

G = gravitational constant

m_1 = mass of object 1

m_2 = mass of object 2

r = distance between centers of the masses

F =[tex]G \frac{ m_1 m_2}{r^2}[/tex]

F = 140N (object on the surface of the earth)

radius of the earth = 6 378.1 x 10^3 m

new distance = [tex]6.3781 x 10^6 + 6.7 x10^6. =13.07 x 10^6.[/tex]

F1/F2 =[tex](13.07 x10^6)^2/(6.3x10^6)^2[/tex].

F1/ F2 = 4.3

140 N /F2 = 4.3

F2 =140/ 4.3 = 32.56 N

The percentage of Weight change =( 140-32.56) / 140  X100

                                     = 76.74 %.

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The Time taken by the stone to reach tot he ground is 2.10 seconds, the horizontal displacement of the stone is 1.95 meters, and the speed of the stone when it reaches the ground is 9.5m/s.

The height H of the cliff from which the child has thrown the stone is 12m.

The value of acceleration due to gravity on mars is 3.7m/s².

The angle at which the stone is throw is 60°.

The initial speed of the stone is 8.2m/s.

The kid releases the stone from the height 1.1m above the height of the cliff.

So, the total vertical displacement of the stone is 13.1 meters.

The time of flight T of the stone can be found by using this equation of motion,

T = 2Usinα/a

Where,

U is the initial velocity,

α is the angle at which the stone is thrown,

a is the acceleration.

Putting the values,

T = √[2(√3)8.2/(3.2)(2)]

T = 2.10 seconds.

Total time of flight is 2.10 seconds.

As there is no acceleration in horizontal direction, so, horizontal direction, and the velocity in horizontal direction is Ucos60°,

So, horizontal displacement R is ,

R = Ucos60°/T

U is the initial velocity,

putting the values,

R = 8.2/4.2

R = 1.95 meters.

Horizontal displacement is 1.95 meters.

The speed S when it hits the ground is,

S = √(2aH)

Where,

a is acceleration,

H is the horizontal displacement,

S = √(2x3.2x13.1)

S = 9.15 m/s.

The speed of the stone on touching the ground is 9.1m/s.

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The longest wavelength that is required to break the bond is 448 nm.

The term pi bond has to do with a multiple bond. In chemistry, there are basically two kinds of bonds which are the pi bond and the sigma bonds. The sigma bonds are the single bonds.

Actually, the sigma bond is stronger than the pi bond and the pi bond can be broken easily especially when  the compound has been irradiated with a strong light of the appropriate wavelength. The energy that is required to break a pi bond is 4.42*10^-19 J. When this energy is supplied, the pi bond can be broken hence the wavelength that correspond to it is what we seek.

Given that;

E = hc/λ

E  energy

h = Plank's constant

c = speed of light

λ = wavelength

We now have;

λ=hc/E

λ= 6.6 * 10^-34 * 3 * 10^8/4.42*10^-19 J

= 4.48 * 10^-7 m or 448 nm

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[tex]3.82[/tex]° is the minimum angle that the cable can make from the horizontal without breaking

For the sign to be in equilibrium, the net force on the sign in vertical direction must be zero. The forces acting on the sign in the vertical direction are the vertical components of the tension forces in cable from each building acting in the upward direction and the weight of the sign acting in downward direction. The vertical components of the tension forces must be equal. Thus, the force equation in the vertical direction can be written as,

[tex]2T sin \theta-W=0[/tex]

Here, T is the maximum tension the cable can withstand, [tex]\theta[/tex] is the angle the cable makes with the horizontal and W is the weight.

Rearranging the equation,

[tex][sin \theta=W/2T],[\theta=sin^-1W/2T],[=sin^-1200N/2(1500N],[=3.82[/tex]]

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The whole wheat bread contains more protein than the white bread .

if you eat tossed salad without ranch dressing ,you gain 4 grams of protein.

a green salad that frequently includes additional veggies (such sliced tomato and cucumber) and is dressed with oil.

Benefits of eating salads :

Healthy Salads Help You Get Enough Fruits and Vegetables.

Vegetable and Fruit Salads are Full of Fibre.

Healthy Salads Cut Calorie Consumption.

You’ll Get Access to Good Fats.

A Salad Provides Water .

Salads Can Cool You Down.

Using flour that has been partially or totally milled from whole or nearly-whole wheat grains, whole wheat bread, also known as wholemeal bread, is a type of bread. For more information, see whole-wheat flour and whole grain. It is a specific type of brown bread. Outside of the United States (such as the UK), whole grain bread and wholemeal bread are synonyms or close synonyms for whole-wheat bread. In some US regions, the bread is simply referred to as wheat bread in contrast to white bread. When compared to the nutritional worth of a high-quality loaf, some varieties of whole-wheat bread are customarily sprinkled with whole or broken grains of wheat.

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Since Intensity depends on power and area, star b will have the same brightness as star a but look smaller

Luminous Intensity is the magnitude or quantity of the brightness of light emitted by a luminous object.

If two stars have the same luminosity, but star b is three times farther away from us than star a. If we are to compare star a with star b, star b will look bright but small.

The reason is due to the fact that Intensity is directly proportional to power and inversely proportional to area and not to the distance or length.

Therefore, star b will look bright but small.

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I think that the awsand is 147.2 .

Saudi Arabia and Russia, acting as leaders of the OPEC plus energy cartel, announced the cut in production this week in a bid to increase oil prices.

This is referred to as the process in which goods and services are made or produced from raw materials into finished products and examples include cement, furniture etc.

The leaders of the OPEC plus energy cartel, announced that there will be a cut in production this week so as to raise the prices. This is because when goods become scarce the the price will increase due to very limited numbers being available.

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In this circuit, the phase angle's magnitude is 88V.

The phase mismatch between the circuit's current and voltage is referred to as the phase angle. In a circuit made entirely of resistors, there is no phase difference. In the purely inductive circuit, however, the current trail the voltage by a phase angle of 90 degrees.

A series or parallel connection between an inductor (L), capacitor (C), and resistor (R) constitutes an LCR circuit. It is also known as an RLC circuit, a tuned circuit, or a resonant circuit. For better comprehension of the LCR circuit analysis, use phasors. A spinning quantity is a phasor.

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The particle with a mass of 3m should be to the left of the third mass, and the particle with a mass of m should be to the right.

F = GMm/r² So that the net gravitational force exerted on M by the two masses is exactly zero, we must now determine where to place a third object of mass M.

Because it consistently attempts to pull masses together rather than pushing them apart, the gravitational force is known as attractive. It is obvious that the gravitational force directly relates to the masses of the two interacting objects; larger, more massive objects will pull apart with a stronger gravitational force.

Gravity has a big impact on us. We would not be able to live on Earth without it. Due to the sun's gravity, Earth revolves around it, keeping us at a comfortable distance from it to experience the planet's warmth and light. It maintains the environment and air we need to breathe.

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Pressure (P) is 0.1309 atm.

A gas that meets the definition of an ideal gas has extremely small molecular volumes and molecular forces that have no impact on the behavior of the gas.

When the parameters are kept within the proper ranges throughout a large range around normal temperature and pressure, many gases, including nitrogen, oxygen, hydrogen, noble gases, some heavier gases like carbon dioxide, and mixtures like air, can be handled as ideal gases.

Given,

Number of moles n =  0. 02 mol

Temperature T = 399 k

Pressure P = ?

Volume V = 5L

The ideal gas constant is equal to 0.08206L atm/mol K.

Number of moles

n = P V/R T

0. 02 = P × 5/0.08206 × 399

0.02 = P × 5/ 32.741

0.65482 =  P × 5

P = 0.1309 atm.

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The angular velocity of each tire from the calculation that we have done is 4.0 rad/s.

Let us recall that the linear velocity is the rate of the change of the displacement of an object with time. We now know that it is possible to relate the angular velocity with the linear velocity by the use of the equation;

v=rw

We now have

v = lnear velocity

r = radius

w = angular velocity

w = v/r

w = 3.0 m/s/(1.5 m/2)

w = 4.0 rad/s

Thus we obtain that we have found the angular velocity as 4.0 rad/s.

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The magnitude of the net external force on the apple is 9.50 N

Force is that thing that causes a change in motion or state of rest of an object.

Since a gust of wind blows an apple from a tree, as the apple falls, the force of gravity on the apple is 9.30 N downward and the force of the wind on the apple is 1.96 N to the right,

Since the forces are perpendicular, the magnitude of the net external force on the apple is F" = √(F² + F'²)

So, substituting the values of the variables into the equation, we have

F" = √(F² + F'²)

F" = √[(-9.30 N)² + (1.96 N)²]

F" = √[86.49 N² + 3.8416 N²]

F" = √(90.3316 N²)

F" = 9.504 N

F" ≅ 9.50 N

So, the net force on the apple is 9.50 N

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Hence,option D . The rod is made up of plastic, the positive charge from the cloth to the rod.

Static charge or an electrostatic charge is a deficiency or extra of electrons that occurs on ungrounded or insulating surfaces. it's miles produced by way of triboelectric costs, expenses which can be generated by friction among surfaces, including the motion of paper thru a copier or printer.

An electrical charge is created when two materials come into contact or are rubbed collectively. when the substances are in touch, electrons can be actually rubbed off of one object and onto the alternative.

Static power is an imbalance of electric fees within or on the floor of a material. The fee stays till it could pass away by way of an electric present-day or electric-powered discharge.

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The magnitude and point of application of the resultant of the four forces

R=200N

AB=CD=125mm

BC=216.5mm

Point to of application

z axis=200mm

y-axis= 63.4mm

This is further explained below.

Generally, the Radius of the quarter circle,

r=250mm

Force, P=40N

Resultant force,

R=-80+120+200-PR

=-80+120+200-40

R=200N

Therefore

cos60=AB/AC

0.5=AB/250

AB=CD=125mm

sin60=BC/AC

√3/2=BC/250mm

BC=216mm

The result of the four forces.Taking moments about the z-axis

[tex]\sum[/tex] My =200*250-80*CD

[tex]\sum[/tex] My=40000N-mm

[tex]\sum[/tex]=R*z

z=200mm

Taking moments about the z-axis

[tex]\sum[/tex]120*250-80*BC

[tex]\sum[/tex] Mz=12680N-mm

12680=200*4

Y=63.4mm

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Atoms are discovered through a series of experiments, through each experiment different discoveries were made about atom which lead to the conclusion that atom is made up of particles.

An atom is the smallest unit which makes up of a molecule. An atom is made up of many subatomic particles such as proton, neutron, and electrons. An element is made up of same type of atoms.

Through a very long series of experiments, the structure of the atom was devised. Each one of the experiment was designed to look at a specific aspect of the atom. At early times, the atom was thought to be a solid ball of positive charge (protons) with electrons (negative charge) embedded in it. Then in 1909, Rutherford did an experiment through which he demonstrated that that picture of the atom was wrong and the positive charge was centered at the center of the atom in the nucleus and occupied a very small volume compared to the whole atom.

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Answer:

It Encourages Healthy Habits.

It Reduces Stress

It Encourages Prosocial Behavior

It Promotes Good Sleep.

It Helps Students Concentrate

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Energy is stored in the electric field between the tubes is 5.85 x 10-11 J.

What is electric field?

Any charge results in an electric field being connected to a specific spot in space. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the magnitude and direction of the electric field. Without any precise information of what created the field, knowing the value of the electric field at a certain location is sufficient to predict what would happen to nearby electric charges.

We have inner tubes.

A1 = \pi ro2 = (3.14) [(0.03 m) / 2] 2

A1 = (3.14) (0.000225 m2) (0.000225 m2)

A1 = 0.0007065 m2

We have outer tubes.

A2 = \pi ri2 = (3.14) (3.14) [(0.04 m) / 2] 2

A2 = (3.14) (0.0004 m2) (0.0004 m2)

A2 = 0.001256 m2

The conducting tubes' total area is provided by -

A = (0.0007065 m2) + (0.001256 m2) (0.001256 m2)

A = 0.0019625 m2

We have a formula that yields

(8.85 x 10-12 C2/Nm2) (0.0019625 m2)/d = C = varepsilon0 A (0.3 m)

C = 5.78 x 10-14 F

The energy stored in the electric field between the tubes when these are coupled to a 45 volt battery is provided as:

U = (1/2) C V2 = (0.5) (5.78 x 10-14 F) (45 V)

U = 5852.2 x 10-14 J

U = 5.85 x 10-11 J

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Initial velocity = 8 m/s

Final velocity = 23 m/s

Time for the velocity change  = 3 s

By definition, the average acceleration is

(23 - 8)/3 = 5 m/s²

Answer: 5 m/s²

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