Which concept are described in the theory proposed by Hess

Answer:

a) Tc = 750 [N]  ;b) See the explanation below.

Explanation:

To solve this problem, we first need a graphical explanation of this, as well as knowing the corresponding questions. Therefore, a search was carried out in google, in the attached image we will find a graphical description of the problem.

b)

The solution of this type of problem corresponds to the use of Newton's third law, applying static which tells us that the sum of the forces in a system in equilibrium without movement must be equal to zero.

a)

In this way we can find by means of a sum of forces on the y axis equal to zero:

- 850 - 450 + 550 + Tc = 0

Tc = 750 [N]

Answer:

[tex]1060.41kg/m^3[/tex]

Explanation:

Bulk modulus is defined as the relative change in the volume of a body produced by a unit of compressive acting uniformly over its surface:

[tex]B=\rho _o \frac{\bigtriangleup P }{\bigtriangleup \rho}[/tex]

Hence the density of the seawater at a depth of 680atm is calculated as:-

[tex]\rho=\rho_o +\bigtriangleup \rho=\rho_o(1+\frac{\bigtriangleup P}{B})\\\\=1030 \times (1+ \frac{(680-1)\times10^5}{2.3\times 10^9})\\=1060.41kg/m^3[/tex]

Answer:

Vacuum

Explanation:

Sound energy as mechanical wave cannot be transmitted through a vacuum.

As a wave, which is a disturbance that transmits energy from one point to another, it requires a material medium for propagation.

(B) Temperature

Explanation:

Temperature is a measure of the average kinetic energy of the atoms or molecules in the system. The water molecules in a cup of hot coffee have a higher average kinetic energy than the water molecules in a cup of iced tea, which also means they are moving at a higher velocity.The specific heat capacity is how much energy is needed to increase the temperature of one gram of a substance by 1°C or 1K.

Answer:

Gravitational potential energy of the child = 4410 J.

Explanation:

Given data:

Mass of the child, [tex]m = 30 \ kg[/tex]

Mass of the child, [tex]h = 15 \ m[/tex]

The gravitational potential energy of the child at 15 m height can be given as,

[tex]GPE = mgh[/tex]

[tex]GPE = 30 \times 9.80 \times 15[/tex]

[tex]GPE = 4410 \ \rm J.[/tex]

The potential energy of the child is 4410J

POTENTIAL ENERGY:

P.E = mass (m) × gravitational force of the Earth (g) × height (h)

Where; g = 9.8m/s²

P.E = 30kg × 15m × 9.8m/s²

P.E = 4410Joules.

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Answer:

factory:

-mechanical energy

-nuclear energy

-gravitational energy

Explanation:

Because of its contact with air surface

Explanation:

When the water comes into contact with surface of a cool glass, water surface gets its contact with open surface air.

Due to the contact of water droplets with atmospheric air water particles condense up, which means molecules inside the water droplets comes into close contact where the inter molecular spaces becomes tight than previous.

Hence, Water gets condensed while it is brought into contact with cool glass.

Answer:

D.[tex]2.6g[/tex]

Explanation:

To find mass of object, you use the equation Density=Mass/Volume

Density=[tex]1.3g/cm^3[/tex]

Volume=[tex]2cm^3[/tex]

[tex]Mass=Density\ \times \ Volume\\=1.3g/cm^3\times2cm^3\\=2.6g[/tex]

The object's mass is 2.6g

The mass of the object is 2.6g. The correct answer is Option D.

You can use the formula for density to find the mass of the object:

Density (d) = Mass (m) / Volume (v)

Rearrange the formula to solve for mass:

Mass (m) = Density (d) x Volume (v), where d is the density, m is the mass, and v is the volume. Rearranging the equation, we have m = d * v. Plugging in the values given in the question, we get m = 1.3 g/cm3 * 2 cm3. Multiplying these values together, we find that the mass of the object is 2.6g.

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Answer:

2.334 m/s

Explanation:

From law of conservation of linear momentum, the sum of initial and final momentum are equal. Since momentum p=mv where m is mass and v is speed. The initial mass of 100 kg has momentum but lorry is at rest hence no momentum.

Initial momentum

100*600=60000 kg.m/s

Final momentum

Both lorry and 100 kg exert momentum hence total mass is 100+25600=25700 kg

25700v=60000

V=60000/25700=2.3346303501945525291828793774319066147859 m/s

Rounded off, final velocity is 2.334 m/s

Final answer:

The speed of the railroad freight car after the cannonball becomes embedded in the sand is 2.33 m/s, calculated using the law of conservation of momentum.

Explanation:

The question involves finding the speed of a railroad freight car after a cannon ball, flying in a horizontal direction, becomes embedded in the sand inside the car. This situation is governed by the law of conservation of momentum, which states that the total momentum of a system before an event must equal the total momentum after the event, assuming no external forces act on it. The initial momentum of the system is the product of the mass of the cannonball and its velocity. After the collision, the cannonball and the car move together, so their combined mass moves with a common velocity.

To solve this, the initial momentum (mass of the cannonball × its velocity) + (mass of the freight car × its initial velocity, which is zero since it's at rest) = the total mass of the system (cannonball + freight car) × the final velocity.

Substituting the given values, we have (100 kg × 600 m/s) + (25,600 kg × 0 m/s) = (25,700 kg) × final velocity. Simplifying, we find the final velocity = (60,000 kg·m/s) / 25,700 kg = 2.33 m/s.

The answer would be 18 W

The equivalent resistance of three resistors with values of 4.0 ohms, 6.0 ohms, and 8.0 ohms connected in series is 18.0 ohms.

The question asks for the equivalent resistance of three resistors connected in series with resistance values of 4.0 ohms, 6.0 ohms, and 8.0 ohms. When resistors are connected in series, the equivalent resistance (Requiv) is the sum of the individual resistances. The formula used is Requiv = R1 + R2 + R3.

Applying the given values:
Requiv = 4.0 Ω + 6.0 Ω + 8.0 Ω
Requiv = 18.0 Ω.

Therefore, the equivalent resistance of the three resistors connected in series is 18.0 ohms.

Answer:

-22,150 N

Explanation:

When the youngster jumps off the platform, during the fall her initial potential energy is converted into kinetic energy, according to the law of conservation of energy. Therefore, we can write:

[tex]mgh=\frac{1}{2}mu^2[/tex]

where the term on the left is the potential energy while the term on the right is the kinetic energy, and where

m = 50.0 kg is the mass of the youngster

[tex]g=9.8 m/s^2[/tex] is the acceleration due to gravity

h = 1.00 m is the heigth of the platform

u is the speed of the youngster as she reaches the floor

Solving for u,

[tex]u=\sqrt{2gh}=\sqrt{2(9.8)(1.00)}=4.43 m/s[/tex]

Then, when the youngster hits the floor, the force exerted on her during the deceleration is given by:

[tex]F=\frac{\Delta p}{\Delta t}=\frac{m(v-u)}{\Delta t}[/tex]

where [tex]\Delta p[/tex] is her change in momentum, and where

m is the mass

v = 0 is the final velocity (she comes to a stop)

u = 4.43 m/s is the initial velocity

[tex]\Delta t=10.0 ms =0.010 s[/tex] is the duration of the collision

Substituting,

[tex]F=\frac{(50.0)(0-4.43)}{0.010}=-22150 N[/tex]

And the negative sign means the direction of the force is opposite to the motion (so, upward).

Answer:

Specific heat.

Explanation:

I got it right!

Answer:

B. The number of protons.

Explanation:

Number of [tex]protons[/tex]  in the [tex]atomic\ nucleus.[/tex]

Protons are positively charged components of the atomic nucleus and it is what makes one element different from another.

According to work-energy theorem, when work is done by an applied force, the object's kinetic energy will change.

The work-energy theorem only takes into account net work; it does not take into account work produced by a single force.

According to the work-energy theorem, an object's change in kinetic energy equals the net work performed by the applied forces.

The quantity of internal and mechanical energy that things contain fluctuates as a result of work. Energy is contributed to a system or an item when work is done on it.

The body was initially at rest before the work being performed; it was only after a force was applied that there were energy changes in the kinetic energy.

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Final answer:

In the interactive 'It's all Uphill,' the work done by pushing an object up a ramp increases the object's potential energy.

Explanation:

When work is done by an applied force on an object, it results in an energy change for that object. If the interactive mentioned is 'It's all Uphill,' where the context involves pushing an object up a ramp, the work done would primarily increase the object's potential energy.

This is because as the object is raised to a higher elevation against gravity, it stores more energy in the form of potential energy which could be converted back to kinetic energy if the object were allowed to fall back down.

Work-energy theorem is crucial in understanding these concepts as it states that the work done on an object results in a change in kinetic energy. When the work is done against gravitational force, like pushing an object up an incline, it increases the object's potential energy.

Conversely, when an object is allowed to move downwards, the gravitational force does work on the object, converting its potential energy into kinetic energy.

Real-world examples, such as driving a car, illustrate how forces can do work which either increase kinetic energy (acceleration) or decrease it (braking).

When the car accelerates, the engine does work, and the car's kinetic energy increases. When you apply the brakes, they do work in the opposite direction of motion, and kinetic energy decreases.

Answer:

50N

Explanation:

A1 (area of the smaller piston) = 20cm² = 0.2m²

F1 (force acting on the smaller piston) = 10N

F2 (force acting on the larger piston) =?

A2 (area of the larger piston) = 100cm² = 1m²

F1 / A1 = F2 / A2

F2 = (F1*A2) / A1

F2 = (10*1) / 0.2

F2 = 50N

Final answer:

Through Pascal's law, applying a force of 10 N to a small piston in a hydraulic system can exert a force of 50 N on a larger piston, illustrating the force magnification capability of hydraulic systems.

Explanation:

The problem you've posed relates to the principles of a hydraulic system, which leverages Pascal's law to transmit force through a fluid in a confined space. According to Pascal's law, the pressure applied to a confined fluid is transmitted undiminished in every direction throughout the fluid. In the context of hydraulic systems, this principle allows for force magnification or reduction based on the areas of the pistons involved.

Given the force applied to the smaller piston (10 N) and the areas of the small (20 cm2) and large (100 cm2) pistons, we can calculate the force exerted on the larger piston as follows:

Therefore, the force exerted on the large piston by applying a force of 10 N to the small piston, in an ideal hydraulic system ignoring friction and other losses, is 50 N.

Answer:D: Precipitation please give brainliest

Explanation:  As liquid is heated by the sun's warmth, it changes into a gas form and rises in the atmosphere. In the air, water vapor cools and returns to a liquid form. ... These water droplets cling together and form clouds. When the droplets become heavy enough, they fall to the ground as precipitation.

Final answer:

Water droplets in clouds fall to Earth as precipitation (option D) when they become heavy enough. This precipitation can fall as rain, snow, sleet, or hail, depending on the air temperature.

Explanation:

When water droplets in clouds become heavy, they fall to Earth as precipitation (option D). This process occurs when water vapor in the atmosphere condenses into tiny droplets of liquid water, forming clouds. If these droplets accumulate enough mass, they can no longer be supported by the air currents in the cloud and fall to the ground as various forms of precipitation, depending on the temperature of the air. Warm air will usually cause the droplets to fall as rain, while cold air can lead to snow, sleet, or hail.

Answer:

Endothermic reaction

Explanation:

If the reaction releases less energy than the energy needed to start the chemical reaction, then the reaction takes energy from the system. An endothermic reaction is a reaction that will takes energy from the system. Those energies will be put into the product of the reaction, make the product have higher potential energy than the reactant. The product of this reactant will be less stable since it's at a high energy state.

The type of chemical reaction where less energy is released than is required to initiate the reaction is called an endothermic reaction.

A chemical reaction that requires more energy to start than is released during the reaction is called an endothermic reaction. These reactions absorb energy from their surroundings, and the energy required to initiate the reaction is called the activation energy. Endothermic reactions have a net absorption of energy because the energy needed to break the bonds in the reactants is greater than the energy released from forming new bonds in the products. For example, photosynthesis is an endothermic reaction where the energy from sunlight is absorbed to convert carbon dioxide and water into glucose.

I can't decide what i'd prefer

I'd go both

Answer:

4) 1 - mass; 5) 3 - Their masses and how far apart they are; 6) See the explanation below.

Explanation:

4)

The force of gravity between two bodies is defined by the following equation.

[tex]F_{g}=\frac{m_{1}*m_{2}*G}{d^{2}}\\ where:\\G = Universal gravitation constant = 6,674 *10^{-11} [N*m^2/kg^2] \\m_{1}= mass 1\\m_{2}= mass 2\\d = distance between the 2 bodies[/tex]

We can see that the gravity force depends on the masses and the distance between them.

5)

The gravity force depends on the masses and the distance between them.

[tex]F_{g}=\frac{m_{1}*m_{2}*G}{d^{2}}\\ where:\\G = Universal gravitation constant = 6,674 *10^{-11} [N*m^2/kg^2] \\m_{1}= mass 1\\m_{2}= mass 2\\d = distance between the 2 bodies[/tex]

6)

The heaviest object found at the bottom of the container is the copper block, since its density is the largest even larger than that of the liquid at the bottom.

The next block is the rubber one, we can see that it's floating over the corn syrup fluid. This is because the density of the rubber block is less than that of the corn syrup, so the block floats.

The next block is plastic, with a density of 1.17 (g/cm^3). This block is located between glycerin liquids and water.

The block on the surface of the container is wood, this density is 0.71[ g / cm^ 3] a density less than that of corn oil.

Answer:

D) Dalton's theory had repeated observations which were supported by extensive evidence.

Explanation:

Dalton had a basis for this prediction and theory. He worked extensive on gases before stepping forward with the Dalton's atomic theory.

His scientific conjecture was highly corroborated with a wide array of experimental evidence and many infallible proofs.

Final answer:

John Dalton's atomic theory superseded Aristotle's theory because it was based on repeated observations and extensive experimental evidence, marking a shift to scientific methodology in understanding matter.

Explanation:

The reason why John Dalton's atomic theory became more widely accepted over Aristotle's theory of matter is choice D) Dalton's theory had repeated observations which were supported by extensive evidence. Unlike Aristotle, who postulated that matter was composed of four elements - earth, air, fire, and water - without empirical evidence, Dalton based his atomic theory on experimental data. He made quantitative measurements and supported his hypotheses with detailed observations on the weights and combinations of elements.

Dalton's work marked a significant transition from philosophical speculation to scientific methodology in understanding the composition of matter. This alignment with the emerging scientific methods of the time made Dalton's theory far more persuasive and enduring than Aristotle's more abstract and empirically unsupported notions.

Answer:

Single replacement

Explanation:

A single replacement reaction is a reaction in which the less reactive elements are replaced by the more reactive element in a compound. This is so because the more reactive element are higher in the electrochemical series element than the less reactive elements

The term is single replacement reaction in chemistry, where one element replaces another in a compound. An example is the reaction between zinc and copper sulfate, forming zinc sulfate and copper.

The process being referred to is known as a single replacement reaction or single displacement reaction in chemistry. A single replacement reaction involves one element displacing another element in a compound, resulting in a new element and a new compound. For example, the reaction between zinc and copper sulfate can be represented as Zn + CuSO4 → ZnSO4 + Cu, where zinc replaces copper in the compound copper sulfate to form zinc sulfate.

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Answer:23 seconds

Explanation:

Acceleration(a)=3.87m/s^2

distance(d)=1020m

Initial velocity(u)=0

d=uxt + (axt^2)/2

1020=0xt + (3.87xt^2)/2

1020=(3.87xt^2)/2

Cross multiply

1020x2=3.87xt^2

2040=3.87xt^2

t^2=2040/3.87

t^2=527.13

t=22.95

Time(t) is approximately 23seconds

Answer:

500m

Explanation:

See attachment below

Explanation:

From the Newton's  velocity of sound relationship , the velocity of sound is directly proportional to the square root of temperature .

In this case The velocity of sound = frequency x wavelength

= 798 x 0.48 = 383 m/sec

Suppose the temperature at this time = T K

Thus 383 ∝ [tex]\sqrt{T}[/tex]                       I

The velocity of sound is 329 m/s at 273 K ( given )

Thus 329 ∝ [tex]\sqrt{273}[/tex]                   II

Dividing I by II , we have

[tex]\frac{383}{329}[/tex] = [tex]\sqrt{\frac{T}{273} }[/tex]

or [tex]\frac{T}{273}[/tex] = 1.25

and T = 339.8 K  = 66.8° C

Answer:

Temagami, James Bay

Explanation:

The fact which is true about the gibbous moon is more than half of its lit surface can be seen.

Option B

Explanation:

There are nearly 12 phases the moon undergoes between one new moon to another new moon condition. All these phases has different names based on their shape or structure visible in the sky during this period.

The gibbous phase of the moon comes in the 4th and 6th phase after the new moon. The gibbous moon which comes in the 4th phase is termed as waxing gibbous as from this time, the size of the moon lit will be increasing till full moon, after this phase.

Then in the 6th phase, the gibbous moon is termed as warning gibbous moon as from this time, the size tends to decrease after this. But in both the conditions, when the moon is in gibbous moon phase, more than half of its lit surface will be seen in the sky.

Answer:

More than half of its lit surface can be seen.

Explanation:

Answer:

828 Hz

Explanation:

The Doppler effect equation states:  

fr = (c + vr) / (c + vs) fs,  

where fr is the frequency heard by the receiver,  

c is the speed of sound,  

vr is the velocity of the receiver,  

vs is the velocity of the source,  

and fs is the frequency emitted at the source  

One important note: vr is positive if the receiver is moving towards the source, negative if away.  

Conversely, vs is positive if the receiver is moving away from the source, and negative if towards.

The ambulance is moving toward you, so vr is positive and vs is negative.

Plugging values into the equation:

fr = (343 m/s + 20 m/s) / (343 m/s − 20 m/s) (737 Hz)

fr = 828 Hz

As you would expect from the Doppler effect, you hear a higher frequency when the ambulance is moving toward you.

The total force required to launch an F-14 from an aircraft carrier is calculated using Newton's second law (F = m * a). The mass of a sports car exerting a known force can also be found using the same principle. Changes in force based on different levels of acceleration and the cumulative effect of multiple engines on acceleration are understood using the proportionality of force to acceleration.

To calculate the total force that gets the F-14 in the air from an aircraft carrier, one can use Newton's second law, which states that force equals mass times acceleration (F = m * a). First, we find the acceleration using the formula a = (v - u) / t, where 'v' is the final velocity, 'u' is the initial velocity (which is 0 m/s in this case), and 't' is the time. Substituting the given values, a = (68.2 m/s - 0 m/s) / 2 s, which gives an acceleration of 34.1 m/s². The mass of the plane is 29,545 kg, so the force can be found by multiplying the mass by the acceleration: F = 29,545 kg * 34.1 m/s², which results in a total force of 1,006,284.5 N.

For the sports car question, we are given the force exerted by the car and asked to find the mass. Since force equals mass times acceleration, the mass is equal to force divided by acceleration. The acceleration (a) can be calculated by using the formula a = (v - u) / t. With v being 27 m/s, u being 0 m/s, and t being 6.3 seconds, the mass (m) is calculated as m = F / a. After computing 'a', you can use the provided force (F) to find 'm'.

If the boy's acceleration changes due to the energy pill, the force can be recalculated using Newton's second law, keeping in mind that Force is proportional to acceleration for a constant mass. If the original force was 45 N for an acceleration of 1.00 m/s², and the new acceleration is 5.6 m/s² with the same mass, the new force will be proportional to this increase. The new force would be found by multiplying the old force by the ratio of the new acceleration to the old acceleration, giving us the new force = old force * (new acceleration / old acceleration).

To determine the acceleration of the cartoon plane with all four engines running, you would simply multiply the acceleration with one engine by the number of engines if each engine provides the same force. Therefore, if the acceleration with one engine is 8.9 m/s², with all four engines it would be 4 times that, resulting in an acceleration of 35.6 m/s².

Answer: Answer: First, You should try to think positive thoughts. Then, you should try and pinpoint your achievements. You often see your failures more than the success. Moreover, you should go check the impostor syndrome in ted ed. If you are trying to be more confident in your school choices than you should try to check the information again or try to go back and remember the time you studied the subject assignments you are doing.

Explanation: That other guy gave a great answer but can you still give a brainliest?

According to the law of reflection, When a ray of light passes from rarer medium to denser medium , it bends towards the normal. So, if there is a transparent material that is more dense than glass then the ray of light will bend towards the normal. The direction of light through the medium is predicted by Snell's Law. According to the Snell's law:

n₁ sin θ₁ = n₂ sin θ₂

Where n₁ is the refractive index of the first medium

n₂ is the refractive index of second medium.

θ₁ and θ₂ are the angle of incidence of light in medium 1 and medium 2