PICTURE INSERTED!!! HELP ME!PLEASE

For a concave mirror with a radius of curvature of 13.6 cm and an object situated 15.2 cm in front of it:

(a) The location of the image is approximately 7.85 cm from the mirror.

(b) The height of the image is approximately -1.39 cm, indicating that it is inverted with respect to the object.

To solve this problem, we can use the mirror equation and the magnification equation.

(a) To find the location of the image, we can use the mirror equation:

1/f = 1/d_o + 1/d_i

where:

f is the focal length of the mirror,

d_o is the object distance (distance of the object from the mirror), and

d_i is the image distance (distance of the image from the mirror).

d_o = -15.2 cm (since the object is in front of the mirror)

f = 13.6 cm (radius of curvature of the mirror)

Substituting these values into the mirror equation, we can solve for d_i:

1/13.6 = 1/-15.2 + 1/d_i

1/13.6 + 1/15.2 = 1/d_i

d_i = 1 / (1/13.6 + 1/15.2)

d_i ≈ 7.85 cm

Therefore, the location of the image is approximately 7.85 cm from the concave mirror.

(b) To find the height of the image, we can use the magnification equation:

magnification = height of the image / height of the object

height of the object = 2.70 cm

Since the object is real and the image is inverted (based on the given information that the object is situated in front of the mirror), the magnification is negative. So:

magnification = -height of the image / 2.70

The magnification for a concave mirror can be expressed as:

magnification = -d_i / d_o

Substituting the values, we can solve for the height of the image:

-height of the image / 2.70 = -d_i / d_o

height of the image = (d_i / d_o) * 2.70

height of the image = (7.85 cm / -15.2 cm) * 2.70 cm

height of the image ≈ -1.39 cm

Therefore, the height of the image is approximately -1.39 cm, indicating that it is inverted with respect to the object.

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The term that describes weathering breaks down the rock. Weathering is the breakdown of rocks, soil, and other geological material under the influence of physical, chemical, or biological agents.

The term weathering refers to a variety of processes that wear away or weaken rocks over time. Weathering is classified into two categories: chemical and physical. Chemical weathering occurs when rock is chemically broken down by reactions with acid rain or other chemicals.

Physical weathering, on the other hand, occurs when rock is broken down into smaller pieces by water, wind, ice, or other forces that do not change the chemical composition of the rock. In conclusion, the term that describes weathering is breaking down the rock.

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The car tyre contains air initially at a pressure of 195 kPa after travelling several km the temperature of the air inside a car tyre rises from 30 to 70°C if the tyre is rigid and does not expand then the new pressure inside the tyre would be 220.74 kPa.

The total applied force per unit of area is known as the pressure.

The pressure depends both on externally applied force as well the area on which it is applied.

The mathematical expression for the pressure

Pressure = Force /Area

the pressure is expressed by the unit pascal or N /m²

By using the Charles law for gases which states that the volume of the gas remains constant then the pressure of the gas is directly proportional to the temperature.

As given in the problem the tyre is rigid and does not expand this means the volume of the tyre remains constant.

The mathematical expression for Charles's law is as follows

P₁/P₂ = T₁/T₂

First, we have to change the temperature from degree Celcius to the kelvin temperature scale

K = 273 + C

where k is the temperature in kelvin and the C is degrees of Celcius

Initially, the temperature was 30° C

T₁ = 273 + 30

T₁ = 303 K

Then after travelling the temperature of the air inside a car tyre rises from 30 to 70°C

T₂= 273+ 70

T₂ =343 K

The car tyre contains air initially at a pressure of 195 KPa

P₁ = 195 kPa

Lets us take the final pressure of the air would be P₂

By substituting the values in the formula

P₁/P₂ = T₁/T₂

195/P₂ = 303/343

P₂ = 220.74 kPa

Thus, the new pressure inside the tyre would be  220.74 kPa.

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A wide variety of producers, consumers, & decomposers can coexist in the ecosystem.

The variety of all living creatures on our world, known as biodiversity, has been disappearing at an alarming rate in recent years. This is largely due to human activities such changing land use, pollution, and climate change.

All living creatures and their interactions are represented by the term "biodiversity," which is short for biological diversity. Because of extinctions and the emergence of new species, biodiversity is always changing. Three types of diversity—species, genetic, and ecosystem—are frequently mentioned by scientists.

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The volume of the gas varies inversely with pressure, and the correct answer is (b) P/3.

According to Boyle's Law, at a constant temperature, the volume of a gas is inversely proportional to its pressure. Mathematically, this can be expressed as:

PV = k

where P is the pressure of the gas, V is its volume, and k is a constant.

If we assume that the mass of the gas remains constant, then k is also constant. So we can write:

\(P_1V_1 = k and P_2V_2 = k\)

where\(P_1 and V_1\) are the initial pressure and volume, and \(P_2 and V_2\) are the final pressure and volume.

If we divide these two equations, we get:

\(P_1V_1/P_2V_2 = 1\)

Since\(V_1\) is inversely proportional to \(P_1\), we can write:

\(V_1 = k/P_1\)

Similarly, \(V_2 = k/P_2.\)

Substituting these values in the above equation, we get:

\((k/P_1)/(k/P_2) = 1\)

Simplifying this, we get:

\(P_2/P_1 = V_1/V_2\)

Since we are given that the temperature remains constant, we can assume that k is constant, and therefore:

\(V_1/P_1 = V_2/P_2\)

If we let \(P_2 = 3P_1\), then we get:

\(V_1/P_1 = V_2/(3P_1)\)

Simplifying this, we get:

\(V_1/V_2 = 1/3\)

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Given that an artery's internal diameter is 4. 25 mm, a hall effect flow probe is positioned on it and a 0. 100-T magnetic field is applied across it to measure the average blood velocity in the artery. The velocity would be 0.3m/s as a result.

Because B, v, and l are perpendicular to one another, we may use this to find. When B, v, and l are entered, the result is = B l v 85v= (0.100T)(4.26103m) v= 85v/(0.100)(4.2610-3= v = 0.3m/s.

The typical voltage output is shown here. Pulsating blood flow causes changes in instantaneous voltage. In this form of measurement, the voltage is negligibly low. is particularly challenging to quantify since the ECG voltages that are linked to heart activity are on the order of millivolts.  By applying an AC magnetic field to make the Hall emf AC with the same frequency via experience, this challenge is overcome. An amplifier has the ability to be extremely selective, amplifying only the desired frequency while filtering out noise and signals at other frequencies.

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Knowing that the units of the ancient Egyptians were palm and ell, where 1 ell was 7 palms and 1 palm was 3 inches, the speed of a hawk tracked as 3 ells/s is equal to 63 in/s. The given options are not the correct ones.            

We have that:

1 ell = 7 palms

1 palm = 3 inches

v: is the speed of the hawk = 3 ells/s

To find the speed of the hawk in inches per second, we need to convert 3 ells/s to in/s, as follows:  

\( v = 3 \: \frac{ells}{s}*\frac{7 \: palms}{1 \:ell}*\frac{3 in}{1 \: palm} = 63 \frac{in}{s} \)      

Therefore, the speed of the hawk is 63 inches per second. The given options are not the correct ones.

You can find another example of speed here:

I hope it helps you!    

Answer:

please mark brainlist

Explanation:

Initial speed   u=80 km/h=80×185=22.22 m/s

Final speed    v=60 km/h=60×185=16.67 m/s

Using   v=u+at

Or   16.67=22.22+α×5

⟹ a=−1.1 m/s2

Here we can study the different temperatures of each one of the layers of the sun.

We will find that the way that the scientist can identify which layer are they studying is "The lowest temperatures are from the photosphere."

A brief description of the temperature of each layer is:

Center of the sun: about 15 million K

Radiative Zone:  Goes from 7 million K to 2 million K.

Convection Zone: goes from 2 million K to 5800K

Photosphere: Is in average 5800 K , but there are sunspots with lower temperatures, of around 3800 K.

Chromosphere: goes from 4300 K to  8300 K

Corona: Around 2 million K.

So now we can analyze each of the options to see which ones make sense.

A) The highest temperatures are from the corona.

This is false, we can see that in the center and in the radiative zone we have larger temperatures than in the corona.

B) The lowest temperatures are from the photosphere.

While on average the temperature of the photosphere is larger than the smaller temperature of the chromosphere, in the photosphere we have the sunspots, and there we have the smallest temperatures in the whole sun, so this is true.

C) The lowest temperatures are from the core (or center).

Clearly false, there we have the larger temperatures.

D)  The highest temperatures are from the radiative zone.

Again false, the larger temperatures are in the center.

So the only true option is "The lowest temperatures are from the photosphere."

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Answer:

The lowest temperatures are from the photosphere

Explanation:

I just took this quick check on connexus

The equilibrium constant (Keeq) for a reaction at 25 °C can be calculated using the equation  Keeq = e^(−ΔG°/RT)

The equilibrium constant (Keeq) for a chemical reaction can be calculated using the equation Keeq = e^(−ΔG°/RT), where ΔG° represents the standard free-energy change, R is the gas constant, and T is the temperature in Kelvin.

In this case, the given standard free-energy change is −12.50 kJ mol−1 (−2.988 kcal mol−1). To calculate the equilibrium constant at 25 °C, we need to convert the temperature to Kelvin by adding 273.15 (25 °C + 273.15 = 298.15 K). Then, we substitute the values into the equation to find the equilibrium constant.

Keeq = e^(−12.50 kJ mol−1 / (8.314 J K−1 mol−1 × 298.15 K))

By evaluating the expression, we can determine the equilibrium constant (Keeq) for the given reaction at 25 °C.

The relationship between standard free-energy change and equilibrium constant in chemical reactions to understand the thermodynamic aspects of chemical equilibria

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The velocity vs displacement curve will be a parabolic graph and the height attained by object B will be lesser than object A.

Velocity is the change in displacement of an object with the change in time. It is a vector quantity because it has both magnitude and direction. The SI unit of velocity is meter per second (m/s).

u = 0

x₀ = Distance travessed by both the discs

F= constant

f = 0

a) (F-f) = ma

a = F/ m

v² = u² + 20x

v² = 0 + (2F/m)x

v = \(\sqrt{(2f/m)x}\)

v v/s x curve will be similar to parabolic graph of v² = (2f/ m)x

b) Energy would be conserved for both.

Since, velocity gained by both is same as Vi = \(\sqrt{(F/m)Xo}\)

-mgh = 1/2mvf² - 1 mvi² = - 1 mvi²

mgh = 1/2mvi² = FXo/2m  (Since, vf = 0)

So, h = (FXo/ 2mg)

Since, mb > ma

Hb < Ha

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Answer:

Infrared thermometers employ a lens to focus the infrared light emitting from the object onto a detector known as a thermopile. The thermopile is nothing but thermocouples connected in series or parallel. When the infrared radiation falls on the thermopile surface, it gets absorbed and converts into heat.

Answer:

D. Mass

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Explanation:

Mass is commonly measured with a balance

Answer: A

Explanation:

the acceleration is constant and gravity causes the ball to fall downwards.

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Answer:

Due to the direction of force due to pressure.

Explanation:

Let there be two small holes having area, \(a\) , at points A and B in the bottle filled with water as shown in the figure \((i)\). Water comes out at the right angles to the wall of the bottle as shown in figure \((ii)\).

From Newton's second law, the acceleration of an object is always in the direction of net applied force.

We know that pressure, \(P\), on any surface due to fluid acts perpendicular to the surface, so, the force due to pressure,\(F=Pa\), will also be perpendicular to the surface as shown in the diagram\((iii)\).

So, the direction of the acceleration of the water element at that point will be perpendicular to the bottle surface which leads to the change in velocity of the water element in the same direction.

That's why water comes out at right angles to the surface of the bottle.

Answer:

Its to make sure that the results are reliable.

If you make only one test, the person could have messed up so if there is a twin test, you know something is screwed up in the results so they know the try again and make sure they don't skrew up again.

Explanation:

The answer to the question, "What is something that you use almost every day that is a polymer?" is:D) plastic
Plastic is the most common example of a polymer that we use daily in various forms, such as bags, bottles, and containers.

Polymers are materials made up of repeating units or monomers, and plastic is one of the most common types of polymers used in everyday life. Plastic can be found in items such as water bottles, food containers, and packaging materials. It is a versatile material that can be molded into various shapes and forms, making it a popular choice for many applications.

Plastic is a polymer, which means it's composed of long chains of molecules. Other options are incorrect because:

A) Metal is not a polymer; it's an element or an alloy of different elements.
B) Gas is a state of matter and not a polymer.
C) Water is a compound  and not a polymer.
E) Wood is a natural material mainly composed of cellulose, which is a natural polymer, but it is not a primary example of a polymer when compared to plastic.

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Answer:

14 x 98/12+13-8 = 119.33..

the .33.. is a repeating decimal

Answer:

Maybe you're hanging out around the wrong crowd. The people you are probably choosing to be around are more quiet then you.

Explanation:

Answer: 40J

Explanation:

Gravitational potential energy is defined as the mass of the object, multiplied by the acceleration due to gravity, and the height from your arbitrary reference point. If we assume that the floor has a gravitational potential of zero, then the gravitational potential of the book on the shelf would be:

\(U=mgh\)

We were given the weight of the book, not the mass. In order to find the mass of the book, we need to divide the weight by the acceleration of gravity. We have that:

\(Mass=Weight/Gravity\)

\(Mass=16N/9.8m/s^2\)

\(Mass=1.63kg\)

Plug everything into the gravitational potential formula to get:

\(U=(1.63kg)*(9.8m/s^2)*(2.5m)\)

\(U=40J\)

The gravitational potential energy of the book placed 2.5 m above from the ground is 40 joules.

The energy of the body due to its position with reference to some other body is called the potential energy of the two - body system.

Given is an object whose weight is 16 N placed on a shelf that is 2.5 m from the ground.

The weight of the book is -

W = mg = 16 N

The gravitational potential energy of the book will be -

E = mgh = 16 x 2.5 = 40 joules

Therefore, the gravitational potential energy of the book placed 2.5 m above from the ground is 40 joules.

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The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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The data that could be related to the fire in the office building and help determine its cause are: a light switch with worn electrical wiring found on the third floor, the fire started on the third floor of the building, and oily rags were kept in an open container on the first floor. Option 1, 5 and 8 are correct.

Fire investigators collect data to determine the cause of a fire. In this example, the fire started on the third floor of the building, and a light switch with worn electrical wiring was found on the same floor. This data suggests that the fire could have been caused by an electrical issue. Additionally, oily rags were kept in an open container on the first floor, which could have potentially contributed to the spread of the fire.

The fact that gasoline was stored in the basement or that the building is located in a downtown area may not be directly related to the cause of the fire. The time it took firefighters to put out the fire and people smoking in bed are also not directly relevant to the cause of the fire in this specific building. Option 1, 5 and 8 are correct.

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Answer: Correct answers is 1, 2, 4, 5, 6, and 8

Explanation:  A light switch with worn electrical wiring was found on the third floor. Gasoline was stored in the basement of the building. It took firefighters 45 minutes to put out the fire. The fire started on the third floor of the building. People coming to work turned on the lights in the building. Oily rags were kept in an open container on the first floor. All these choices are a possible cause for the fire, including the time the firefighters took to put the fire out.

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The angle θ0 at which the electron is incident between the two plates, we can use the relationship θ0 = arctan(E * L / (2d)).

determine the angle θ0 at which the electron is incident between the two plates, we can consider the forces acting on the electron due to the electric field.

The electric field between the plates is directed from left to right. The force experienced by the electron due to the electric field is given by the equation:

F = q * E

where F is the force, q is the charge of the electron, and E is the electric field strength.

Since the electron is negatively charged, it experiences a force in the opposite direction to the electric field. This force will cause the electron to accelerate in the opposite direction.

When the electron enters the region between the plates:

The force due to the electric field will act on the electron in the opposite direction to its initial motion, causing it to decelerate. The electron will follow a curved path due to this deceleration.

When the electron exits the region between the plates:

The force due to the electric field will act on the electron in the same direction as its final motion, causing it to accelerate. The electron will follow a curved path due to this acceleration.

Since the situation is symmetrical, the angle at which the electron exits the region between the plates will be the same as the angle at which it enters.

We need to determine the angle θ0 at which the electron enters the region between the plates.

Consider a small portion of the path between the plates and assume that the electric field is constant within this small region.

In this small region, the net force acting on the electron can be expressed as:

F_net = F_electric - F_centrifugal

where F_electric is the force due to the electric field, and F_centrifugal is the centrifugal force.

The force due to the electric field can be calculated as:

F_electric = q * E

The centrifugal force can be calculated as:

F_centrifugal = m * \(v^2 / r\)

where m is the mass of the electron, v is its velocity, and r is the radius of the curved path.

The electron is moving in a curved path, the net force acting on it is responsible for the centripetal force required to maintain this curved path.

Setting the net force equal to the centripetal force, we have:

F_electric - F_centrifugal = m * \(v^2 / r\)

Substituting the expressions for F_electric and F_centrifugal, we get:

q * E - m * v^2 / r = m * \(v^2 / r\)

Simplifying the equation, we have:

q * E = 2 * m * \(v^2 / r\)

Since the electron enters and exits the region between the plates with the same speed v, we can simplify further:

q * E = 2 * m *\(v^2 / r\)

The forces acting on the electron when it enters the region between the plates:

The force due to the electric field is acting in the opposite direction to the initial motion, causing deceleration.

The centrifugal force is acting in the same direction as the initial motion, opposing the deceleration.

For the electron to enter the region between the plates, the force due to the electric field must be greater than the centrifugal force.

We have:

q * E > m * \(v^2 / r\)

Since the electron is moving perpendicular to the electric field, the electric force can be expressed as:

q * E = q * (V/d)

where V is the voltage between the plates, and d is the spacing between the plates

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Answer:

Explanation:

A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.

In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.

Amplitude:

The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."

Effective Length:

The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."

It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.

Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.

Answer:

180 m/s

Explanation:

To find the answer you simply divide 900 by 5.

Answer:

A wedge can split an object apart

A  lever is the seesaw

inclined plane is a ramp

a pulley can reduce the amount of friction

wheel and axle is the rope one

Explanation:

Following are the matches:

Simple machines are basic mechanical devices that can help make work easier by reducing the amount of force or effort needed to do a task. They are usually the most basic forms of machines, often made up of only one or two parts, and are used to change the direction or magnitude of a force.

There are six types of simple machines:

Simple machines are the building blocks for more complex machines, and they are used in many everyday devices and equipment to make work easier and more efficient.

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The total pressure acting on the submarine is approximately 106,993.6 Pa.

To calculate the total pressure acting on the submarine, we need to consider both the pressure due to the depth of the seawater and the atmospheric pressure.

The pressure due to the depth of the seawater can be calculated using the formula:

Pressure = density × gravity × depth

where density is the density of the seawater, gravity is the acceleration due to gravity, and depth is the depth of the submarine below the seawater.

Given:

Density of seawater = 1020 kg/m³

Depth of submarine below seawater = 40 cm = 0.4 m

Acceleration due to gravity = 9.8 m/s²

Pressure due to the depth of the seawater = 1020 kg/m³ × 9.8 m/s² × 0.4 m = 3993.6 Pa

Next, we need to consider the atmospheric pressure, which is given as 103,000 Pa.

To find the total pressure acting on the submarine, we need to add the pressure due to the depth of the seawater to the atmospheric pressure:

Total pressure = Atmospheric pressure + Pressure due to depth of seawaterTotal pressure = 103,000 Pa + 3,993.6 Pa

Therefore, the total pressure acting on the submarine is approximately 106,993.6 Pa.

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The velocity of an object includes direction of the motion of an object whereas speed does not include direction. Thus, the correct options for 1, 2, 3, 4, and 5 are B, B, A, A, and B, respectively.

Velocity can be defined as the directional speed of an object in the motion as an indication of the rate of change in the position of an object as observed from a particular frame of reference by the observer and as measured by a particular standard of time.

The velocity is different from that of speed as it is a vector quantity, the velocity of an object includes direction of the motion of an object whereas speed does not include direction.

Track runners cover same distance however, the winner in the race is the one who covers the particular distance in less time than other competitors.

The slowest runner in the graph is the one represented with blue color. This is because, this runner took maximum time to cover the distance.

The distance covered by the train is 300 miles in time period of 6 hours. Therefore, the speed of the train will be the distance covered by the train divided by the total time taken.

Speed of the train = 300 miles/ 6 hours

Speed of the train = 50 miles per hour.

The example of velocity is the one with the unit of length per time. From the given options, 80 miler per hour is an example of velocity as miles is the unit of length and hour is the unit of time.

Therefore, the correct options for 1, 2, 3, 4, and 5 are B, B, A, A, and B, respectively.

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a. The shift of the LM curve to the left occurs due to a decrease in the money supply or an increase in the demand for money.

b. Two reasons for a steep IS curve are High Investment Demand and Inflexibility in Investment.

The LM curve shows the various combinations of interest rates and income that bring about the equality of the supply and demand for money.

Below are three reasons for the leftward shift of the LM curve:

1. Decrease in Money Supply: The leftward shift of the LM curve can occur if the money supply decreases. This causes the interest rates to rise because the demand for money is greater than the supply.

2. Increase in Money Demand: An increase in the demand for money can lead to a leftward shift of the LM curve. This happens when people want to hold more money than is available in the economy, and the interest rate rises as a result.

3. Increase in Prices: An increase in prices causes a leftward shift of the LM curve. This is because, at higher prices, people need more money to conduct their transactions, and an increase in the money supply is required to keep the interest rate constant.

Now, moving on to the steep IS curve:

1. High Investment Demand: A steep IS curve may occur if there is high investment demand. This happens when businesses are optimistic about the future and invest more, causing the demand for credit to increase and the interest rates to rise.

2. Inflexibility in Investment: A steep IS curve can also be caused by inflexibility in investment. This occurs when businesses are unwilling to change their level of investment due to economic conditions, and any changes in the interest rates have a significant effect on investment and output levels.

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Conduction: heat transfers by direct contact

Convection : heat transfers within fluid

Radiation: heat transfers due to electromagnetic waves

Conduction: 7 , 8 ,

Convection : 10

Radiation : 6,9