Two objects gravitationally attract with a force of 100 N. If the mass of one object is doubled and the mass of the other object.is tripled,
what is the new gravitational force?

Answer:

8173.8 km

Explanation:

Fg=G(M*m/r^2)

r=sqrt(G*M*m/Fg)

G=6.6743*10^-11

M(earth)=5.972*10^24kg

M(object)=352kg

Fg=-2100N

r=sqrt((6.6743*10^-11)*(5.972*10^24kg)*(352)/-2100)

r=8173808m

r=8173.8km

According to Newton's calculations, gravity reduces to a fourth of what it was at the surface of the Earth if the distance from the planet's centre is doubled. At the Earth's surface, a satellite with a mass of 1,000 kg exerts a weight force of 9,800 N.

Satellites are pulled toward Earth by its gravity, even when they are hundreds of kilometres distant. The satellite doesn't fall back to Earth; instead, it travels into orbit above it due to gravity and the velocity it acquired during launch into space.

A satellite that is in a steady circular orbit around the Earth is always falling. It encounters a gravitational pull toward the centre of Earth as it orbits, which forces it to shift course and “fall” towards Earth.

Therefore, Since gravity is the only force acting on a satellite in circular orbit, the centripetal force and gravity must be equal: Fc = Fg.

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Answer:

232 N

Explanation:

By Hooke's law, the force applied to a spring is proportional to the stretch of the spring, so

F = kx

Where F is the force, k is the spring constant and x is how much it is stretched.

So, replacing k by 58N/cm and x by 4 cm, we get

F = (58 N/cm)(4 cm)

F = 232 N

Therefore, the force applied is 232 N

Answer:

Friction Opposes Motion of an Object.

Now

To get the Net force that Moves an Object and causes acceleration....You subtract the Frictional force

Net force = Pushing Force - Frictional Force

Recall

Net Force; F=Ma

Ma = P - Fr

Now the question asked for How Much force Must be applied to Maintain a Constant velocity.

In a Constant Velocity Motion... Acceleration do not change... Its Zero

So Putting this into the formula above

M(0) = P - Fr

0=P - Fr

Fr = P.

This means

That The force needed to keep this object Moving at Constant Velocity Must be equal to its Frictional Force

Since Frictional Force; Fr =223N

The Applied Force(Pushing Force) Must be equal to 223N too.

Answer:

250N

Explanation:

w = mg

m=25

g = 10

w=25x10

w=250

If a student is pulling on an object that has a mass of 25 kg across the floor. Assuming gravity to be 10 m/s², then the weight of the object would be 250 N , therefore the correct answer is option C.

It can be defined as the force by which a body attracts another body toward its center as the result of the gravitational pull of one body and another.

As given in the problem, a student is pulling on an object that has a mass of 25 kg across the floor. Assuming gravity to be 10 m/s2,

The weight of the object = 25 × 10

                                          = 250 N

Thus,  the weight of the object would be 250 N , therefore the correct answer is option C.

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Answer:

metal conducts heat faster than wood. which means the metal conducted heat away from your hand (or whatever it is) faster than wood.

Explanation:

just because they feel warm/cold doesn't always mean that it is warm/cold. if they both were sitting at room temp for a long time, then both will eventually reach the temp of the room. even though they are the same temp the metal will feel colder than the wood because of the thermal conductivity of the metal compared to the wood.

The different thermal conductivities of metal and plastic are important in the design of the bowl is metal conducts heat faster than Plastic. which means the metal conducted heat away from your hand (or whatever it is) faster than Plastic.

Thermal conductivity can be defined as the degree to which heat is transmitted through the cross-section of the unit of an object, where the temperature exits directly across the surface.

Electrical conductivity is a measure of how much energy (moving charge) can pass through objects under the influence of a used electric field. Thermal conductivity measures how heat (heat moving energy) can pass through objects below temperature differences.

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The Ptolemaic model was a geocentric model of the Solar System developed by the ancient Greek astronomer, mathematician, and geographer Claudius Ptolemy.

According to this model, the Earth was at the center of the universe, and all the other celestial bodies revolved around it. Each planet in the Ptolemaic model was believed to move along a circular path called an "epicycle," which was centered on a point called the "deferent." The deferent, in turn, moved along a circular path around the Earth, called the "eccentric." The epicycle's center moved along the deferent at a constant rate, which gave the appearance of retrograde motion of the planet relative to the Earth. The Ptolemaic model was a complex and intricate system that required numerous epicycles, deferents, and eccentrics to explain the observed motions of the planets. While it was able to account for some of the observed planetary motions with reasonable accuracy, it had limitations and inaccuracies that became apparent as observations became more precise over time.

Here,

Eventually, the Ptolemaic model was replaced by the heliocentric model developed by Nicolaus Copernicus, which placed the Sun at the center of the Solar System and explained the observed motions of the planets more accurately.

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Answer:

Their mobile electrons

Explanation:

Answer:

\(\huge\boxed{\sf Law \ of \ Interaction}\)

Explanation:

Newton's Third Law of Motion States that:

"For every action, there is a reaction which is equal in magnitude but opposite in direction."

Newton's third law is also called "Law of Interaction".

Hope this helped!

Explanation:

The law of Interaction

When you are inhaling, the intrapulmonary pressure is less than the atmospheric pressure.

What is intrapulmonary pressure? Intrapulmonary pressure (P pulmonale) is the pressure inside the lungs, which decreases when the diaphragm and intercostal muscles contract, expanding the lung volume and lowering the air pressure inside the lungs.

The air is then compelled to move from the region of higher pressure outside the body to the region of lower pressure inside the lungs.

According to Boyle's law, which states that the pressure of a given mass of gas is inversely proportional to its volume at a fixed temperature, the decrease in intrapulmonary pressure during inhalation results in the air being drawn into the lungs.

What happens when we inhale? Inhalation, also known as inspiration, is the process of breathing in air, which involves the diaphragm contracting and flattening, and the intercostal muscles contracting to increase the thoracic cavity's size. This reduces intrapulmonary pressure and causes air to be drawn into the lungs.

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The schools in Uganda and Minneapolis are similar because both are places where students learn and neither has a large enough room.

Due to poor economic conditions and management, the schools of Uganda and Minneapolis have small rooms in which students sit to learn. Both are the places where students comes to learn and make better their economic condition so we can conclude that option C and F are correct.

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Explanation:

The bonds that keep molecules together break apart and form new bonds during chemical reactions, rearranging atoms into different substances. Each bond takes a distinct amount of energy to either break or form; the reaction does not take place without this energy, and the reactants stay as they were.

1. dependant variable

2. graph

3. model

4. experiment

6. scientific law

9. hypothesis

11. independent variable

12. theory

14. volume

15. society

The scenario provided is an excellent model for fission, as it demonstrates the chain reaction that occurs when a neutron collides with a uranium nucleus and splits it into two smaller nuclei, releasing a large amount of energy in the process.

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Answer:a no net force

Explanation: google lol

Answer:

B 23m/s

Explanation:

From the above information we get,

Initial velocity= 3m/s

Acceleration by gravity = 10 m/s2 (approx)

Time taken =2 seconds

v=u+at (First Equation Of Motion)

v= 3 + 10 × 2

v= 23 m/s

Answer: i think its c

Explanation:

Answer:

a

Explanation:

Answer:

Elliptical galaxies, such as M87, are the oldest and roundest galaxies in the universe. Astronomers think these galaxies are formed in major mergers—dramatic collisions between galaxies that result in one massive galaxy being entirely consumed by another.

Explanation:

hope this helps...

have a good day...

The work done by friction as the block crosses the rough spot is approximately 19.6 J.

To solve this problem, we need to find the speed of the block when it reaches the end of the rough patch, and then use the work-energy principle to calculate the work done by friction.

First, let's find the maximum compression of the spring using Hooke's Law:

F = -kx

where F is the force exerted by the spring, k is the spring constant, and x is the compression distance.

At maximum compression, the force exerted by the spring is equal and opposite to the weight of the block:

F = mg

where m is the mass of the block and g is the acceleration due to gravity.

Thus, we have:

-kx1 = mg

Solving for x1, we get:

x1 = -mg/k = - (12 kg)(9.81 m/s^2) / (4539 N/m) ≈ -0.246 m

Note that x1 is negative because the spring is compressed.

Now, let's find the speed of the block when it reaches the end of the rough patch. We can use conservation of energy to relate the potential energy stored in the spring to the kinetic energy of the block:

(1/2)kx1^2 = (1/2)mv^2

where v is the speed of the block.

Solving for v, we get:

v = sqrt[(k/m)x1^2] = sqrt[(4539 N/m) / (12 kg)] x 0.246 m ≈ 1.61 m/s

Now we can calculate the work done by friction using the work-energy principle:

W_friction = ΔK = (1/2)mv^2 - 0

where ΔK is the change in kinetic energy of the block.

Since the block starts from rest and ends with speed v, we have:

ΔK = (1/2)mv^2 - 0 = (1/2)(12 kg)(1.61 m/s)^2 ≈ 19.6 J

Therefore, the work done by friction as the block crosses the rough spot is approximately 19.6 J.

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Answer:

1.25m/s

Explanation:

Velocity is defined as the change of displacement with respect to time. Mathematically, velocity = displacement/time

Given displacement = 3km and time = 40minutes

Converting km to meters and minuetes to seconds;

Since 1 km = 1000m

3 km = (3*1000)m

3 km = 3000m

Also 1minute = 60seconds

40 minutes = 60*40 = 2400seconds

velocity = displacement/time

Velocity (in m/s) = 3000/2400

Velocity (in m/s) = 30/24

Velocity (in m/s) = 5/4

Velocity (in m/s) = 1.25m/s

Hence, the average velocity of he hiker is 1.25m/s

Note that the above prompt is related to the creation of the Cosmos and the Big Bang Theory.

1) It is true to state that Most of the helium in the universe formed during the ERA OF NUCLEOSYNTHESIS.

2) It is true to state that The GUT ERA refers to a time period in which the strong, weak, and electromagnetic forces were all unified. The only force that is distinct in this era is gravity. GUT stands for Grand Unified Theories.

3) It is true to state that in The PLANCK ERA it is the period when all four forces are thought to have been unified.

4) It if factually correct to state that the COSMIC MICROWAVE BACKGROUND is our expression for the photons we see that was first released when the universe was about 380,000 years old. Traces of the "seeds" that eventually created the stars and galaxies we see today are engraved on it.

5) It is correct to state that The BIG BANG is the name we give to the moment when the expansion of the universe began.

6) It is also right to state that a very short period of extremely rapid expansion, called INFLATION, is thought to have occurred when the universe was about 10⁻³⁸ seconds old. Although some scholars indicate that period was 10⁻³⁶ seconds.

The Big Bang hypothesis is a physics theory that describes how the cosmos grew from a high density and temperature condition. Several Big Bang cosmological theories explain the history of the visible universe from its earliest known eras to its eventual large-scale shape.

Two significant scientific discoveries provide credence to the Big Bang idea.

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The correct answer is B. brighter. Absolute magnitude is the measure of the intrinsic brightness of a star.

It is defined as the apparent magnitude a star would have if it were located at a distance of 10 parsecs (32.6 light-years) from Earth.If two stars have the same absolute magnitude, it means they have the same intrinsic brightness. However, the apparent brightness of a star depends not only on its intrinsic brightness but also on its distance from Earth. The farther a star is, the fainter it appears.In this scenario, star A is nearer, which means it is closer to us and, therefore, appears brighter than star B, even though they have the same absolute magnitude.

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False. The unit used to measure the energy contained in natural gas is typically joules or cubic meters (m^3) of natural gas. The term "therm" is sometimes used as a unit of energy, but it is more commonly used to describe the amount of energy contained in 100,000 British thermal units (BTUs). In the United States, the therm is sometimes used to describe the amount of energy contained in 100 cubic feet of natural gas.

Answer:

A Gravitational potential energy

Bkinetic Energy

CGravitational potential energy

Dnone of this

Answer:

88N

Explanation:

m = 9kg

a = 9.8m/s²

F = ma = 9 × 9.8

F = 88N

The average electric power that can be expected from this micro hydro facility is 220.77 Watts.

The term "micro hydro" refers to very small-scale hydroelectric power, which includes installations that can supplement other sources of electricity for single-family residences. Micro hydro systems typically have lower efficiencies than commercial hydroelectric installations, with efficiencies in the range of 75%.

To calculate the average electric power that can be expected from the micro hydro generator, we can use the following formula:

Power (W) = Efficiency × Flow Rate (L/min) × Vertical Drop (m) × 9.81 (m/s²) × 0.001 (conversion factor)

Step 1: Convert efficiency to a decimal: 75% = 0.75
Step 2: Plug in the given values:
Power (W) = 0.75 × 1200 L/min × 5 m × 9.81 m/s² × 0.001

Step 3: Perform the calculation:
Power (W) = 0.75 × 1200 × 5 × 9.81 × 0.001 = 220.77 Watts

The average electric power that can be expected from this micro hydro facility is 220.77 Watts.

To determine if this project should be seriously considered, we should compare the expected energy production with the construction cost of $3,000. The decision ultimately depends on the homeowner's energy needs, the availability of other energy sources, and the time they are willing to wait for a return on investment. If the homeowner can justify the energy production and potential savings on their electricity bill against the initial cost, then this project may be worth considering. However, they should also take into account any maintenance costs and the lifespan of the micro hydro generator before making a final decision.

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Answer:

the net force or resultant force

To calculate the resulting kinetic energy of an electron subjected to an electric field, we need to know the charge of the electron and assume it is accelerated through the electric field.

The charge of an electron is approximately -1.6 x 10^-19 coulombs (C). Given that the electron is at rest initially, its initial kinetic energy is zero.

The electric field is given as 12 kV/m, which can be converted to volts per meter (V/m) by multiplying by 1000. Therefore, the electric field is 12,000 V/m.

The work done on the electron by the electric field is equal to the change in its kinetic energy. The work done can be calculated using the formula:

Work = force * distance

The force experienced by the electron in an electric field is given by Coulomb's law:

Force = charge * electric field

Substituting the values:

Force = (-1.6 x 10^-19 C) * (12,000 V/m)

Now, we can calculate the work done:

Work = (-1.6 x 10^-19 C) * (12,000 V/m) * (1.5 m)

To convert the work done to kinetic energy, we use the fact that work done is equal to the change in kinetic energy:

Work = Change in kinetic energy

Therefore, the resulting kinetic energy of the electron is equal to the calculated work done.

Now, let's perform the calculations:

Work = (-1.6 x 10^-19 C) * (12,000 V/m) * (1.5 m)

= -28.8 x 10^-19 J

Note: The negative sign indicates that the work is done on the electron, which increases its kinetic energy.

To express the kinetic energy in femtojoules (fJ), we need to convert from joules (J) to femtojoules (fJ):

1 J = 10^15 fJ

Therefore, the resulting kinetic energy of the electron is:

Kinetic energy = -28.8 x 10^-19 J = -28.8 x 10^-4 fJ

Please note that the resulting kinetic energy is negative, indicating that work was done on the electron to accelerate it.

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Answer:

yes

Explanation:

When you put salt in water, the water molecules pull the sodium and chlorine ions apart so they are floating freely, increasing the conductivity. These ions are what carry electricity through the water with an electric current. In short, saltwater (water + sodium chloride) can help to produce electricity.