properties can be used to distinguish and separate substances.

Answer:

The power of the kettle is P = 1 watt.

Explanation:

The definition of power is:

Power equals the quotient between work and time, or:

P = w/t.

In this case, we know that the work is:

w = 1J

And the time is:

t = 1 s

Then the power will be:

P = 1J/1s = 1 J/s

Also knowing that:

1 J/s = 1 W

(w is the unit for Watt)

We can conclude that the power of the kettle is:

P = 1 W

Answer:

\(1.4*10^-7N\)

Explanation:

Step one:

given data

mass m1= 87 kg

mass m2=60kg

sitting distance r= 0.5m

The gravitational constant G= 6.67*10^-11Nm^2/kg^2

Required

The Force of attraction between the two bodies

Step two:

Applying the formula for the force of attraction by gravity on two  bodies

\(F=\frac{Gm1m2}{r^2}\)

substituting our data we have

\(F=\frac{6.67*10^-^1^1 *87*60}{0.5^2}\\\\F=\frac{3.48174*10^-^7}{0.25^2}\\\\F=1.4*10^{-7}N\)

The evolution of energy matrices, the social and environmental consequences of energy sources, and the relationship between energy development and industrial development are critical aspects of understanding the interplay between energy and the modern world. Balancing the need for energy with sustainability and minimizing environmental impacts is a key challenge for societies today.

a) The evolution of the main energy matrices after the industrial revolution:

The industrial revolution marked a significant shift in the sources of energy used to power the growing industries and societies. Prior to the industrial revolution, human and animal labor, along with limited use of water and wind power, were the primary sources of energy. However, with the advent of steam engines and mechanization, there was a need for more abundant and efficient sources of energy.

Coal: Coal became the dominant energy source during the early stages of the industrial revolution. It provided the necessary fuel for steam engines and played a crucial role in powering factories, railways, and steamships.

Oil: The discovery and commercialization of oil in the late 19th century revolutionized the energy landscape. Oil became a major source of energy for transportation, as it fueled the internal combustion engines of automobiles, trucks, and airplanes.

Natural Gas: With the expansion of oil drilling, natural gas also emerged as an important energy source. It is used for heating, electricity generation, and as a feedstock for various industrial processes.

Nuclear Energy: The development of nuclear power in the mid-20th century introduced a new source of energy. Nuclear reactors harness the energy released from nuclear fission reactions to generate electricity.

Renewable Energy: In recent decades, there has been a growing emphasis on renewable energy sources such as solar, wind, hydroelectric, and geothermal power. These sources offer sustainable alternatives to fossil fuels, with lower environmental impact and the potential for long-term energy security.

b) The social and environmental consequences of these energy sources:

Each energy source has its own social and environmental consequences:

Fossil Fuels: The burning of fossil fuels, such as coal, oil, and natural gas, releases greenhouse gases and contributes to climate change. Extraction of fossil fuels can lead to habitat destruction, water pollution, and health hazards for workers and nearby communities.

Nuclear Energy: While nuclear energy does not produce greenhouse gas emissions during operation, it presents risks associated with accidents, radioactive waste disposal, and potential weaponization of nuclear materials. Public safety concerns and environmental risks have led to debates over the use of nuclear power.

Renewable Energy: Renewable energy sources offer benefits in terms of reduced greenhouse gas emissions and environmental sustainability. However, their deployment may require land use changes, and some technologies (e.g., large-scale hydroelectric dams) can cause ecological disruptions and displacement of communities.

c) The relationship between energy development and degree of industrial development:

Energy development and industrial development are closely intertwined. The availability of affordable and reliable energy sources is crucial for driving industrialization and economic growth. Access to abundant energy resources enables countries to power their industries, expand transportation networks, and improve living standards.

Countries that have invested in the development and exploitation of energy sources have typically experienced accelerated industrialization and technological advancement. The ability to secure and utilize energy resources efficiently has been a determining factor in a country's competitiveness and economic prosperity.

Conversely, countries that lack access to energy sources or fail to invest in their energy sectors may face challenges in industrial development. Limited energy availability can constrain production capacities, limit access to modern technologies, and hinder economic progress.

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To find the x and y coordinates of the center of mass for the system of these three objects, we need to calculate the weighted average of the x and y coordinates of each individual object.

First, let's label the objects:
- Pipe wrench: mass = 2.3 kg
- Hatchet: mass = 1.5 kg
- Hammer: mass = 1.0 kg

Next, let's denote the x and y coordinates of each object's center of mass on the graph:
- Pipe wrench: (x1, y1)
- Hatchet: (x2, y2)
- Hammer: (x3, y3)

To calculate the x coordinate of the center of mass (x_cm), we use the formula:
x_cm = (m1*x1 + m2*x2 + m3*x3) / (m1 + m2 + m3)

Substituting the given values, we get:
x_cm = (2.3*x1 + 1.5*x2 + 1.0*x3) / (2.3 + 1.5 + 1.0)

Similarly, to calculate the y coordinate of the center of mass (y_cm), we use the formula:
y_cm = (m1*y1 + m2*y2 + m3*y3) / (m1 + m2 + m3)

Substituting the given values, we get:
y_cm = (2.3*y1 + 1.5*y2 + 1.0*y3) / (2.3 + 1.5 + 1.0)

By plugging in the specific x and y coordinates for each object, you can calculate the x_cm and y_cm values for the system of these three objects.

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The smallest sound power output of the airplane motor that can be listened to on the ground is  6.73 × 10^-6 W which has the lowest-intensity sound that is still loud and has an intensity of  10^-12 W/m^2.

The intensity of sound =  10^-12 W/m^2

Altitude =  6,500 m.

Calculate the smallest sound energy output of an aircraft motor that can be heard on the ground is done by using the formula:

I = P/(4πr^2)

Pythagoras' theorem is used for calculating the distance

d = (\(\sqrt{6500^2 + R^2}\))

I = 10^-12 W/m^2

d = \(\sqrt{6500^2 + R^2}\)

d = 6500 m

P/(4πd^2) = I

\(P/(4π(6500)^2) = 10^-12 W/m^2\)

\(P = 4π(6500)^2 × 10^-12 W\)

P = 6.73 × 10^-6 W

Therefore, we can conclude that the smallest sound power output of the aircraft engine that can be heard on the ground is  6.73 × 10^-6 W.

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Answer:

See below

Explanation:

Find the slope of the graph (gradient)

  pick a convenient point with easy to read coordinates...say  (30 s  , 150 m)

       150 m / 30s = 5 m/s

The only non-contact force listed is gravity

Answer:

6.86 N

Explanation:

Applying,

F = mg............... Equation 1

Where F = Force exerted by gravity on the mass, m = mass, g = acceleration due to gravity

Note: The Force exerted by gravity on the mass is thesame as the weight of the body.

From the question,

Given: m = 700 g = (700/1000) = 0.7 kg

Constant: g = 9.8 m/s²

Substitute these values into equation 1

F = 9.8(0.7)

F = 6.86 N

To complete the energy crossword puzzle, fix the meanings with the relevant definitions provided. For instance,

2. The four sources of all energy are Electricity, renewables, fossils, and nuclear power.

4. It is impossible for any machine to be 100% efficient

5. The name sometimes given to the sum of potential and kinetic energy is Mechanical energy.

To fill a crossword puzzle, you have to follow the clues provided in the text. For example, the first clue shows that the word or words for box 2 are or are related to the four sources of all energy.

Also, the word in the 4th box will be impossible because it is impossible for any machine to be 100% efficient.

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The maximum velocity of the bird is m * g / k. Answer: The maximum velocity of the bird is m * g / k.Let us consider the given data. A bird can fly with a maximum speed of v₁ if it flies vertically upwards and a maximum speed of v₂ if vertically downwards. Air friction is proportional to speed.

And, the force generated by the bird's wing is constant in any direction.We have to determine the maximum speed of the bird when it flies in the horizontal direction. Let us find the maximum speed of the bird when it flies vertically upwards. When the bird flies upwards, it faces two forces: the force due to its wings and the force of air friction. The force due to the bird's wings is equal to its weight since the bird is flying with a constant velocity. F = m * gT

Let us now find the maximum velocity of the bird when it flies horizontally. In this case, the direction of the force of air friction is opposite to the direction of velocity, which is horizontal. Therefore, we have F = -kv. Equating this to the force generated by the bird's wings, which is constant, we get m * g = kv. Solving for v, we get v = m * g / k. This is the maximum velocity of the bird when it flies horizontally.  

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Answer:

Ascaris and Arthropods are both types of organisms found in the animal kingdom. Ascaris are parasitic worms, commonly referred to as roundworms, which can be found in warm climates all over the world. Arthropods, on the other hand, are a large group of animals, including insects, arachnids, and crustaceans, that typically have jointed legs and a hard exoskeleton. Arthropods are found in almost all environments, from oceans to deserts to the tops of mountains.

Explanation:

Answer:

im sorry i dont know...

Explanation:

BUT.. thats why i downloaded brainly so i can learn

In a circuit with two identical components connected in parallel, the current which flows through its different branches will be different.

A parallel circuit can be defined as a type of circuit that comprises branches so that the current divides and only part of it flows through any branch.

In this type of circuit (parallel circuit) the voltage, or potential difference, across each branch of a parallel circuit is the same, but the currents may vary.

The main characteristics of parallel circuits include the follow;

Thus, a parallel circuit will have same voltage across the circuit components and different current flowing in each components.

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Answer:

they both exert the same pressure

Explanation:

Pressure is the ratio of force to area. It is given as:

\(P=\frac{F}{A}\) ,  where F is the force, P is pressure and A is area

1) For the cuboid, the area of the base placed on the ground (A) = 8 cm × 3 cm = 24 cm² = 0.0024 m². Therefore the pressure is:

\(P=\frac{F}{A}=\frac{60}{0.0024} =25000N/m^2=25KN/m^2\)

2) For the cube, the area of the base placed on the ground (A) = 4 cm × 4 cm = 16 cm² = 0.0016 m². Therefore the pressure is:

\(P=\frac{F}{A}=\frac{40}{0.0016} =25000N/m^2=25KN/m^2\)

Therefore, they both exert the same pressure.

Answer:

biking / jogging/ running, walking

Explanation:

Cardio workouts can strengthen your heart and blood vessel

The smooth and accurate execution of movement as conceived in the mind and executed by the body parts describes ; The central nervous system.

Although your question is incomplete an answer is provided which falls within the scope of your question

The human brain receives, interprets and transfer signals it deduces from the impulses it received to the various sense organs ( body parts ) for execution. and this process involves coordination within the nervous system.

The central nervous system is a category of the Nervous system of a human and it consists of the spinal cord and the human brain. and the peripheral nervous system

Hence we can conclude the smooth and accurate execution of movement as conceived in the mind and executed by the body parts describes, The central nervous system.

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The equation of the force between the two masses separated by distance r, is determined as Gmm/r².

The equation of the force between the two masses is determined from Newton's law of universal gravitation as shown below.

f = Gmm/r²

where;

Thus, the equation of the force between the two masses separated by distance r, is determined as Gmm/r².

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One possible function that changes from concave up to concave down as x increases is f(x) = x^3. The second derivative of this function is f''(x) = 6x, which changes from negative to positive as x increases.

Therefore, the phrase that best describes the behavior of the second derivative of this function is "The second derivative changes from negative to positive as x increases," which corresponds to option OA. The phrase that best describes the behavior of the second derivative of the function OA is also "The second derivative changes from negative to positive as x increases," which corresponds to option A.

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Answer:

960 Watt

Explanation:

From the question,

Electric power = Voltage squared/Resistance

P = V²/R ..................... Equation 1

Where P = power, V = Voltage, R = Resistance

Given: V = 120 volts, R = 15 ohms.

Substitute these values into equation 1

P = 120²/15

P = 14400/15

P = 960 Watt

Answer:

When you take the compass away from the bar magnet, it again points north. So, we can conclude that the north end of a compass is attracted to the south end of a magnet. ... In Experiment 2, when you move the north pole of a magnet toward the south pole of the other magnet, the two magnets attract.

Planets fall into two major categories (terrestrial and jovian).

a. Planets can be divided into two main groups.

b. The fusing of hydrogen into helium is how the Sun produces energy.

c. Gravity brought about the solar nebula's collapse.

d. There are a tons of comets and asteroids.

The four main characteristics of the solar system are listed above in the order in which they contributed to its origin.

The majority of planets can be divided into two groups: gaseous giants and other terrestrial planets. As a result of the solar chromosphere's solar winds.

This energy powers the fusion of hydrogen and helium in the sun's core, which powers the sun itself. The solar nebula was a cloud of gases and dust that started to spin on its own, drawing the microscopic particles closer due to gravity. In the solar system, there are around 100 billion comets and asteroids.

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Answer:

from W-Z.. i think on a swing you get your most potential energy at W and Z is where you go up so Z would be where the kinetic energy increased and W is where potential energy decrease

Explanation:

hope this helps

Olivia is on a Swing at Playground - Option 2 Olivia is on a swing at the playground. Her kinetic energy increasing at x and her potential energy decreasing at x. At mean position velocity is maximum so kinetic energy ( K.E ) is also maximum and at mean position potential energy is minimum. Therefore, kinetic energy is increasing and potential energy decreasing at x.

Explanation

Credits to someone on a different answer

Answer:3km east

Explanation: Displacement is science is the net change in distance from the initial point, not the total distance travelled.  It wound up 3 squares (3km) to the right (east).  Displacement is 3km east.

The displacement of the car is 3 km  in east direction. Hence option (D) is correct.

The term "displacement" refers to a shift in an object's position. It is a vector quantity with a magnitude and direction. The symbol for it is an arrow pointing from the initial location to the ending place.

For instance, if an object shifts from location A to position B, its position changes. Displacement is the term used to describe this shift in an object's position.

In the given diagram,

Initial position of the car is at A.

Final position of the car is at B.

Hence, the displacement of the car = shortest distance between position A and position B

= 3 unit in east direction

= 3 × 1 km  in east direction

= 3 km  in east direction.

So, the displacement of the car is 3 km  in east direction.

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Answer:

–0.11 N.

Explanation:

Hope this helps

Explanation:

The acceleration due to gravity at a distance equal to the radius of the Earth above its surface is approximately 9.8 m/s^2, which is the same as the acceleration due to gravity at the surface of the Earth. This is because the gravitational force acting on the satellite is determined by the mass of the Earth and the distance between the satellite and the center of the Earth, and at a distance equal to the radius of the Earth, these factors cancel out to produce an acceleration equal to the surface acceleration.

Statement D about pneumatic systems is true. Pneumatic systems are cleaner than hydraulic systems.

Pneumatic systems are employed in a wide range of manufacturing and assembly applications. They can be used to transport objects on production lines as well as in maintenance facilities.

In hydraulic systems liquid is used as fluid for the force transmission. While in the pneumatic system air is used causing more cleanliness in the system.

The pneumatic systems are cleaner than hydraulic systems.

Hence, a statement D about pneumatic systems is true.

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Answer:

organism is false

Explanation:

The heart is an organ and not an organism because,

An organism is a group of systems that performs a specific function.

An organ is a group of tissue that performs a specific function

To freeze the liquid, the amount of heat that needs to be removed is determined by multiplying the mass of the liquid by the heat of fusion (Lf).

To boil the liquid, the amount of heat that needs to be added is determined by multiplying the mass of the liquid by the heat of vaporization (Lv).

The amount of heat required to freeze or boil a substance can be calculated using the formulas Q = m * Lf and Q = m * Lv, respectively. In these formulas, Q represents the amount of heat, m represents the mass of the substance, Lf represents the heat of fusion, and Lv represents the heat of vaporization. By substituting the given values of Lf and Lv, and knowing the mass of the liquid, one can calculate the required amount of heat for freezing or boiling the liquid.

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