Un recipiente contiene una capa de aceite (densidad 600 kg/m³) de 17.1 cm, sobre otra de agua (densidad 1000 kg/m³) de 28.4 cm de espesor. ¿Qué presión hidrostática hay en el fondo del recipiente?

Answer:

outer core.....

The two layers of the earth where the actual temperature is hotter than the melting point is outer and inner core.

The Earth is separated into four layers.

These layers are the crust, the mantle, the outer core, and the inner core.

The hottest layer is the inside of the Earth.

The inner core is more hot than the outer core.

The force on the inner core is higher.

Therefore we can conclude that both the inside layers of the earth are hotter than the melting point.

Learn more about the Earth’s crust here:

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Answer:

1) The person ma tend to fall

2) The person will remain upright

Explanation:

1) According to Newton's first law of motion, an object will continue in its state of rest or maintain its uniform motion on a straight line unless acted on by a force

Therefore, when a person steps off onto the floor from a walkway moving at 3 m/s, the friction between the floor and the person's feet prevents the forward motion of the feet, however the person's upper body will tend to continue with the forward motion, and the person may tend to tilt and fall over

2) If the person steps onto another walkway moving with the same velocity, the initial velocity of all parts of the person's body is maintained, such that the person will continue in his uniform motion without experiencing any force and therefore, the person will remain upright

Answer:2 increase

Explanation:

Answer: D. plant more trees where forests are cut down.

Explanation:

Deforestation has to do with the cutting down of trees. Cutting down the forest reduces the size of animal habitats, increases erosion, and results in an increase in the amount of carbon dioxide in the atmosphere.

Ok order to tackle the above, it is necessary that we should plant more trees where forests are cut down.

Complete question:

A 50,000 kg train car moving at 2 m/s collides and connects to another identical car initially at rest. Find the velocity of the two cars immediately after collision.

Answer:

The final velocity of the two cars after collision is 1 m/s.

Explanation:

Given;

mass of first car, m₁ = 50,000 kg

mass of the second car, m₂ = 50,000 kg  (identical to first car)

initial velocity of the first car, u₁ = 2 m/s

initial velocity of the second car, u₂ = 0

let the final velocity of the two cars after collision = v

The final velocity of the two cars can be calculated from law of conservation of linear momentum for inelastic collision.

m₁u₁ + m₂u₂ = v(m₁ + m₂)

50,000 x 2    + 50,000 x 0 = v(50,000 + 50,000)

100,000 = 100,000v

v = 100,000 / 100,000

v = 1 m/s

Therefore, the final velocity of the two cars after collision is 1 m/s.

Answer:

It is called photosynthesis.

Explanation:

Answer:

The average atomic mass (sometimes called atomic weight) of an element is the weighted average mass of the atoms in a naturally occurring sample of the element. Average masses are generally expressed in unified atomic mass units (u), where 1 u is equal to exactly one-twelfth the mass of a neutral atom of carbon-12.(I hope this helps!)

Answer:

The kinetic energy of the molecules increases as it heats up causing it to vibrate faster and faster.

Explanation:

Answer:

The substance is increasing

Hope this helps!

In AB and BC of the graph, the substance is first under the constant temperature condition then under section BC the linear increment in the temperature with the time.

A graph is a pattern consisting of a collection of elements, some of which are connected in some way.

In the isothermal process, the change in the temperature is zero. While if temperature is increasing along the time, a linear relationship is found.

Hence, in AB and BC section of the graph, the substance is first under the constant temperature condition then under section BC the linear increment in the temperature with the time.

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Answer:

Roughly 25 meters

Explanation:

Use the formula D=1/2*a*t^2 where d=distance, a=acceleration, and t=time

Plug in all the variables we know...

D=1/2*a*12^2

in order to solve for acceleration, we use the formula  F=ma where F=force, m=mass, and a=acceleration.

Plug in known variables,

342N=989kg*a

solve for a and we get...

342N/989kg=a

Now that we know the acceleration, we can plug that into our original equation and solve for distance.

D=1/2*342N/989kg*12s^2

Simplify,

D=72s^2*342N/989kg

D=72s^2*342kgm/s^2/989kg

D=72s^2*342m/s^2/989

D=72*342m/989

D=24624/989 meters, or 24.898meters which rounds up to 25.

Answer:

1.2m/s

Explanation:

Using the law of conservation of energy

m1u1+m2u2 = (m1+m2)v

v is the common velocity after collision

Substitute the given values

3(2) + 2(0) = (3+2)v

6 + 0 = 5v

v = 6/5

v = 1.2m/s

Hence the velocity of the white ball after the collision is 1.2m/s

Answer:

The NBA is a place the best players want to show off their talents at and possibly be very successful.

Explanation:

The players would like fame, the games, and fans that would cheer their name.

[tex] \sf• \: We \: have \: 12 \: ohms \: of \: resistance, \: 9 \: amps \: of \: current.[/tex]

[tex] \\ [/tex]

[tex] \sf{• \: The \: Voltage\: within \: the\: circuit. }[/tex]

[tex] \\ [/tex]

[tex] \huge\bf{ \underline{ Solution:- }}[/tex]

[tex] \sf According \: to \: the \: question, [/tex]

[tex] \sf• \: Current \: (I) = 9 \: Amps.[/tex]

[tex] \sf• \: Resistance \: (R) = 12 \: Ω[/tex]

[tex] \sf{We \: know \: that, }[/tex]

[tex] \bf \red{ \bigstar{ \: V = IR }}[/tex]

[tex] \rightarrow \sf V = 9 \times 12[/tex]

[tex] \rightarrow \sf V = 108[/tex]

[tex] \\ [/tex]

[tex] \sf \purple{Therefore, \: the \: voltage \: within \: the \: circuit \: is \: 108 \: v \: .}[/tex]

Some knowledge of radioactivity would be useful for understanding the certain medical procedures. Option A is correct.

The act of producing radiation spontaneously is known as radioactivity. This is accomplished by an unstable atomic nucleus that want to give up some energy in order to move to a more stable form.

Radiation is being employed to assist humanity in medical, academia, and industry, as well as to generate power.

Radiation is also important in agriculture, archaeology, space exploration, law enforcement, geology a variety of other fields.

Some knowledge of radioactivity would be useful for understanding the certain medical procedures.

Hence, option A is correct.

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Answer:

i think it is 40 kilometers in the positive direction... if not im sorry

Explanation:

Answer:

Explanation:

See the attached figure . See the forces acting on man pulling up the box .

Man is stationary so net force acting on man is zero .

T + R = Wman

R is the reaction force of the ground of second floor  .

R = Wman - T

Answer:

The tuba is the biggest, and among the newest, of all the brass instruments. Tuba players create the low-pitched sound by making a kind of "buzz" with their breath against the mouthpiece and pressing the tuba's valves to form notes.

Explanation:

in other words it because less air molecules are abloe to go through the mouth peiece of the tuba

Answer:

Nuestro mejor amigo escuchará la música más rápido a una temperatura de 36 ºC (309.15 K)

Explanation:

Supongase que el aire se comporta como un gas ideal y que experimenta un proceso adiabático, entonces la velocidad del sonido ([tex]v[/tex]), medida en metros por segundo, queda traducida en la siguiente fórmula:

[tex]v = \sqrt{\frac{\gamma \cdot R_{u}\cdot T}{M} }[/tex] (1)

Donde:

[tex]\gamma[/tex] - Coeficiente de dilatación térmica, sin unidad.

[tex]R_{u}[/tex] - Coeficiente universal de los gases ideales, medido en kilogramo-metros cuadrados por mol-Kelvin-segundo cuadrado.

[tex]T[/tex] - Temperatura, medida en Kelvin.

[tex]M[/tex] - Masa molar, medida en kilogramos por mol.

Como se puede ver, la velocidad del sonido es directamente proporcional a la raíz cuadrada de la temperatura. Por tanto, nuestro mejor amigo escuchará la música más rápido a una temperatura de 36 ºC (309.15 K)

[tex] \sf{(i)  \: We \:  are \:  given  \: a  \: figure \:  of  \: Series \:  Circuit. }[/tex]

[tex] \sf{Here \:  Resistances  \: are ,}[/tex]

[tex] \sf• \:  R_{1}  =3  Ω[/tex]

[tex] \sf•  \: R_{2}  =3Ω[/tex]

[tex] \sf•  \: R_{3}  =3Ω[/tex]

[tex] \sf{We \:  know  \: the  \: formula  \: of  \: the  \: Equivalent \:  Resistance \:  for  \: Series  \: Circuit, }[/tex]

[tex] \sf ⇒ R_{s} =(3 + 3 + 3)Ω[/tex]

[tex] \sf \therefore R_{s}  =9Ω[/tex]

[tex] \sf  \pink{ \boxed{Answer : 9 Ω.}}[/tex]

[tex] \\  \\ [/tex]

[tex] \sf{(ii)  \: We \:  are \:  given  \: a  \: figure \:  of  \: Parallel \:  Circuit. }[/tex]

[tex]\sf{Here \:  Resistances  \: are ,}[/tex]

[tex] \sf• \:  R_{1}  =3  Ω[/tex]

[tex] \sf• \:  R_{2}  =3  Ω[/tex]

[tex] \sf• \:  R_{3}  =3  Ω[/tex]

[tex] \sf{We \:  know  \: the  \: formula  \: of  \: the  \: Equivalent \:  Resistance \:  for  \: Parallel  \: Circuit, }[/tex]

[tex] \sf⇒ \frac{1}{ R_{p} }  =  \frac{1}{3}  +  \frac{1}{3}  +  \frac{1}{3} [/tex]

[tex] \sf⇒ \frac{1}{ R_{p} }  =  \frac{1 + 1 + 1}{3} [/tex]

[tex] \sf⇒ \frac{1}{ R_{p} }  =  \frac{3}{3} [/tex]

[tex] \sf⇒ \frac{1}{ R_{p} }  =  1[/tex]

[tex] \sf \therefore R_{p}   =  1Ω[/tex]

[tex] \sf  \pink{ \boxed{Answer : 1 Ω.}}[/tex]

Answer:

potential energy is the energy possessed by a body by vitue of its possition relative to others stresses with itself electric charge and other factors. kinetic energy is energy which a body possesses by being in motion

Explanation:

hope this helped.have a good day

Answer:

4.2 km

Explanation:

A triangle is a polygon with three sides and three angles. There are different types of triangles such as isosceles triangle, scalene triangle, equilateral triangle and right angled triangle.

Sine rule states that for a triangle with angles A,B and C and corresponding opposite sides a, b, and c, the following formula holds:

[tex]\frac{a}{sin(A)}=\frac{b}{sin(B)}=\frac{c}{sin(C)}[/tex]

Let the starting point be A, hence the side opposite to the  angle = a = distance travelled in north east direction.

Let the point of 60° of northeast be B = 90° + (90° - 60°) = 120°, hence the side opposite to the  angle = b = resultant displacement = 8 km.

Let C be the endpoint, hence the side opposite to the  angle = c = distance travelled north = 5 km

Using sine rule:

[tex]\frac{b}{sin(B)}=\frac{c}{sin(C)} \\\\\frac{8}{sin(120)}=\frac{5}{sin(C)} \\\\sin(C)=\frac{5*sin(120)}{8} =0.5412\\\\C=sin^{-1}(0.5412)=32.8^o\\\\[/tex]

∠A + ∠B + ∠C = 180° (sum of angle in a triangle)

∠A + 120 + 32.8 = 180

∠A = 27.2°

[tex]\frac{b}{sin(B)}=\frac{a}{sin(A)} \\\\\frac{8}{sin(120)}=\frac{a}{sin(27.2)} \\\\a=\frac{8*sin(27.2)}{sin(120)} \\\\a=4.2\ km[/tex]

Therefore she travelled 4.2 km in the north east direction

Explanation:

two types of sound wave

Answer:

The maximum possible up-thrust on the boat is 11,995.2 N

Explanation:

According to Archimedes' principle, the thrust received by an object immersed a fluid is equal to the weight of the fluid displaced;

The given parameter of the boat in sea water are;

The volume of the boat = 1.2 m³

The density of seawater = 1020 kg/m³

Density = Mass/Volume

Therefore, Mass = Density × Volume

The maximum volume of water that the boat displaces = 1.2 m³

The mass of the water displaced by the boat = (Density of seawater) × (Volume of seawater displaced)

∴ The maximum possible mass of the water displaced by the boat = 1.2 m³ × 1020 kg/m³ = 1224 kg

The maximum possible mass of the water displaced by the boat, m = 1224 kg

Weight = Mass, m × g

Where;

g = The acceleration due to gravity = 9.8 m/s²

The up-thrust on the boat = The weight of the seawater displaced

∴ The maximum possible up-thrust on the boat = m × g = 1224 kg × 9.8 m/s² = 11,995.2 N

The maximum possible up-thrust on the boat = 11,995.2 N.

Answer:

[tex]f_{o}[/tex] = 391.67 Hz

Explanation:

The sound of lowest frequency which is produced by a vibrating sting is called its fundamental frequency ([tex]f_{o}[/tex]).

The For a vibrating string, the fundamental frequency ([tex]f_{o}[/tex]) can be determined by:

[tex]f_{o}[/tex] = [tex]\frac{v}{2L}[/tex]

Where v is the speed of waves of the string, and L is the length of the string.

L = 42.0 cm = 0.42 m

v = 329 m/s

[tex]f_{o}[/tex] = [tex]\frac{329}{2*0.42}[/tex]

   = [tex]\frac{329}{0.84}[/tex]

[tex]f_{o}[/tex] = 391.6667 Hz

The fundamental frequency of the string is 391.67 Hz.

Answer:

kinetic energy

Explanation:

Great work on the first one.

The second one is Spring.

(The next position will be #1.

In #1, the southern hemisphere will be tilted toward the sun, so it will be Summer there.

The position just before Summer is Spring.)

Answer:

Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can explioit these properties. Helium was the first gas used for filling balloons and dirigibles

Answer:

false its an attraction property

Answer:

True

The attraction is a chemical property.