The sun will probably end up as a white dwarf. How will it be different then from what it is today

Answers

Answer 1

Answer:

The differences that will be observed are;

1) The Sun will become faint and will no longer be yellow but rather appear white and will no longer be visible (become invisible) by unassisted vision as we can see the Sun today

2) The size of the Sun will shrink to a size comparable to the size of the Earth

3) The Sun will cool down and will no longer radiate as much heat

4) The nuclear reactions that generate energy on the Sun's will seize and the and the heat from the Sun will be from residual thermal energy

5) The core, which is the hottest part of the Sun will no longer be hydrogen but carbon and oxygen

Explanation:


Related Questions

The total weight of a Cubical body is W N in the air. The cube has a side length of 0.4 m. If the cube is thrown in oil (Sp.gr =0.85 ), will the body floats or sinks? Explain why? If the cube sinks, what is its weight in the oil? If the cube floats, what is its submerged depth in the oil?

Answers

If the weight of the cube in air (W) is less than or equal to 54.4 N, the cube will float. If the weight of the cube in air (W) is greater than 54.4 N, the cube will sink. If the cube floats, its submerged depth in the oil will be 0.16 m.

We must compare the buoyant force exerted on the cube to its weight to determine whether it will float or sink in the oil.

Weight of the cube in air: W N is the weight of the cube in air.

Weight of the cube in oil: To determine the weight of the cube in oil, we must take buoyancy into account. The buoyant force exerted on a submerged item in a fluid equals the weight of the fluid displaced by the object.

The volume of the cube:

\((side length)^3 = (0.4 m)^3\) = 0.064 \(m^3\).

Weight of the oil = Specific gravity * Weight of an equal volume of water

= 0.85 * (density of water) * (volume of the cube)

The density of water is approximately 1000 \(kg/m^3.\)

Weight of the oil = 0.85 * 1000\(kg/m^3\) * 0.064 \(m^3\)

= 54.4 N

Thus, the weight of the cube in the oil is 54.4 N.

Comparison of buoyant force and weight: The cube will float if the buoyant force is more than or equal to the weight of the cube in air. If the cube's weight exceeds the buoyant force, the cube will sink.

We compare the weight of the cube in air to the weight of the cube in oil because the weight of the cube in air is given as W N:

If W ≤ 54.4 N, the cube will float.

If W > 54.4 N, the cube will sink.

Submerged depth (if the cube floats): If the cube floats, it will displace the same amount of oil as it does. The following calculation may be used to calculate the cube's submerged depth in oil:

Submerged depth = (Volume of the cube) / (Area of the cube's face in contact with the oil)

Submerged depth = (0.064 m^3) / (0.4 m^2)

= 0.16 m

Thus, if the cube floats, its submerged depth in the oil will be 0.16 m.

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Solve each problem. write your answer and solution.

1. how much is done by mila when she exerted a 25n force in lifting her bag to a height of 2m?

2. a 10kg block of wood is pulled across a level ground by fore of 15n applied at an angle of 30 degree from the horizontal. how much work is done, if it is moved to a distance of 3m?

(note: f applied = 15n x cos 30 degree, cos 30 degree = 0.5)

3. what is the work done by a boy in pushing the wall of the classroom, if he

applied a force of 30n?

4. a man weighing 500n walks a flight of stairs 10m high. how much work is

done by the man?

5. a sack of rice with a mass of 120kg is lifted by a laborer in a 15m high

building. compute the amount of work done by the laborer.

Answers

1. W = 50J

2. W = 6.9J

3. Work done is same as force  = 30N

4. P = 480W

Solution:

1. Here given:

F = 25N

D = 2m

We have to find  W = ?

Work done Formula : W= F x D

By substituting ,

W = 25 x 2

W = 50J

2. Here given,

F = 15N

Angle = 30°

distance = 3m

W = 15* 3 * cos 30

= 6.9 J

3. Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. When we apply a force of 30N to a wall, it responds with the same force.

4. The work done will be calculated using the formula:

W = mass*gravitational acceleration*height.

Furthermore,

power = work done / time.

500 + 100 = total weight

600 N = total weight

Maintain the values in the formula -

Work completed = 600*4

2400J

P = 2400/5

= 480W

Hence, the power is 480 Watt.

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True or False?

If the cart is moving on the positive x axis, the x-component of velocity must be positive.

Answers

The given statement is false, the cart is moving on the positive x axis, the x-component of velocity must be positive. The magnitude and the direction both define it.

What exactly is speed?

The definition of velocity is the change in displacement with respect to time. Speed is a vector quantity. This element is time-based. The x and y components of velocity at any angle are determined.

Given both magnitude and direction, velocity is a vector quantity. The relationship between displacement and velocity is known as the velocity dependence.

The cartesian coordinate, however, specifies the displacement direction. In contrast to an object moving along a negative x-axis, the cart moves along a positive x-axis and has a positive velocity.

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A student connects a circuit
with a cell, an ammeter, and a
buzzer and listens to the buzzer.
She adds another cell.
Describe and explain what
happens to the current

Answers

Answer:

let the voltages of the cell be V and R the equivalent resistance of the circuit.

 

I1=RV∵ only one cell connected  ;

I2=RV+V=R2V∵ two cells connected in series  ;

I3=RV+RV=R2V∵ two cells connected in parallel ⇒ total current is same as sum of the currents due to each.

Now , 

LHS = 3I3I2=3R2VR2V=3(R24V2) 

RHS = 2I3(I1+I2)=2R2V(RV+R2V)=2R2VR3V=3R2therefore, LHS = RHS   

Can you please check if the answer I checked the right ​

Can you please check if the answer I checked the right

Answers

Answer:

yeah that is correct that what I think

The S.I. unit of E is NC^-1 and that of B is NA^-1 m^-1, then unit of E/B is

Answers

The S.I. unit of E is NC^-1 and that of B is NA^-1 m^-1, then unit of E/B is A m/C (ampere meter per coulomb). This unit represents the ratio between the electric field and the magnetic field, indicating the strength and direction of the electromagnetic field.

The SI unit of electric field (E) is NC^(-1) (newton per coulomb) and the SI unit of magnetic field (B) is NA^(-1) m^(-1) (tesla). To determine the unit of E/B, we need to divide the unit of E by the unit of B.

Dividing the unit of E (NC^(-1)) by the unit of B (NA^(-1) m^(-1)), we can simplify the expression:

E/B = (NC^(-1))/(NA^(-1) m^(-1))

To simplify this expression, we can cancel out the common units in the numerator and denominator:

E/B = (N/C)/(N/(A m))

Now, let's simplify further by dividing the numerator and denominator:

E/B = (N/C) * (A m/N)

Canceling out the common units:

E/B = (A m)/(C)

Therefore, the unit of E/B is A m/C (ampere meter per coulomb).

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what are fossil fuels?​

Answers

fossil fuels are things such as natural gas, petroleum, and coal and they are made from dead organisms containing organic molecules that release energy deep in the ground they are not renewable

Answer:

Fossil Fuels are natural fuels like coal or gas that were formed millions of years ago and take millions of years to form. They are formed from the remains of past living organisms.

Explanation:

Well you do no really need an explanation for this one...

The state of matter of an object is which of the follwing?
physical property
chemical change
physical change
chemical property

Answers

Physical property because that is the answer

The mass of the earth is 6x10^24 kg and that of the moon is 7.4x10^22 kg. If the radius of the moon is 1740 km, then find the value of g if the earth is compressed into the size of moon.​

Answers

Answer:

In the surface of the moon, gravitational acceleration is 1.63 m/s*2.

Explanation:

An object of mass M will accelerate gravitationally at a distance R if it is at the following distance:

g = G*M/R^2

Where the gravitational constant is G.

G = 6.67*10^(-11) m^3/(kg*s^2)

At the surface of a moon, the distance between its surface and its center will be equal to its radius, since a moon's mass is concentrated at its center, thus:

R = 1740 km

It's important to remember that we need meters in order to work:

1 km = 1000 m

so:

1740 km = (1740)*1000 m = 1740000 m

R =  1740000 m

Basically, the mass consists of:

M = 7.4x10^22 kg

Incorporating all that into the gravitational acceleration equation, we get:

g = (6.67*10^(-11) m^3 / (kg*s^2))*(7.4x10^22 kg) / ( 1740000 m)^2

g = 1.63 m / s^2

In the surface of the moon, gravitational acceleration is 1.63 m / s*2.

a chef fills 50ml container with 43.5 g of cooking oil. what is the density of the oil?

Answers

Answer:

0.87 g per ml

Explanation:

D=M/V

43.5/50=0.87

what is a microwave?

Answers

Answer:

an electromagnetic wave with a wavelength in the range 0.001–0.3 m, shorter than that of a normal radio wave but longer than those of infrared radiation. Microwaves are used in radar, in communications, and for heating in microwave ovens and in various industrial processes.

Look at the following chemical equation.

4Al + 3O2 → 2Al2O3

What is true about this chemical equation?
A
It is balanced because the mass of the reactants is equal to the mass of the products.

B
It is balanced because the number of reactants is equal to the number of products.

C
It is unbalanced because the mass of the reactants is greater than the mass of the products.

D
It is unbalanced because the number of reactants is greater than the number of products.

Answers

Answer:

it would be c

Explanation:

its the only one that makes sence

If an object engaging in simple harmonic motion has its amplitude doubled, the maximum acceleration changes by what factor?

Answers

If an object engaging in simple harmonic motion has its amplitude doubled then the maximum acceleration changes by factor 2.

Simple harmonic motion is a specific kind of periodic motion of a body that arises from a dynamic equilibrium between an inertial force that is proportional to the body's acceleration away from the static equilibrium position and a restoring force on the moving object that is directly proportional to the magnitude of the object's displacement and acts towards the object's equilibrium position. If friction or any other energy dissipation is not present, it leads to an oscillation that is represented by a sinusoid and that lasts indefinitely.

The differential equation for SHM is given by,

\(\frac{d^2x}{dt^2} + \sqrt{\frac{k}{m}} x=0\)

where \(\frac{d^2x}{dt^2}\) is the acceleration of SHM.

when x = A

\(\frac{d^2x}{dt^2} = \omega^{2} A\)

if A = 2A

\((\frac{d^2x}{dt^2})' = \omega^{2} 2A\)

\((\frac{d^2x}{dt^2})' = 2(\frac{d^2x}{dt^2})\)

Hence acceleration gets doubled if amplitude gets doubled.

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How is 'one standard kilogram' defined in SI system?

Answers

Explanation:

The standard one kilogram mass is the mass of platinum-iridium cylinder kept at 0 degree Celsius at the International Bureau of Weights and Measures in France. The mass is equal to mass of 1 litre of water at 4 degree Celsius.

standard unit definition​

Answers

Answer:

Standard units are the units we usually use to measure the weight, length or capacity of objects.

Answer:

THE SYSTEM OF UNITS WHICH IS AGREED BY THE INTERNATIONAL CONVENTION OF SCIENTISTS HELD IN FRANCE IN 1960 IS CALLED SI SYSTEM.

According to Newton's 2nd Law of Motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is
10 m/s/s
10 m/s
100 m/s/s
1 m/s/s

Answers

According to Newton's second Law of motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is 1m/s².

How to calculate acceleration?

The acceleration of a moving body can be calculated by dividing the force of the body by its mass.

According to this question, the mass of an object is 10 kg and the force is 10 newtons, then the acceleration can be calculated as follows:

acceleration = 10N ÷ 10kg

acceleration = 1m/s²

Therefore, according to Newton's second Law of motion, if the mass of an object is 10 kg and the force is 10 newtons, then the acceleration is 1m/s².

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A steam power plant operates between the pressure limit of 3.0 Mpa for the boiler and 75 kPa for the condenser. The plant operates in an ideal Rankine cycle with reheater with superheated vapor enters the high pressure turbine at 3 Mpa and 300 oC, and leaves at 1 MPa. Steam is then reheated at constant pressure to 300 oC before it is expanded to 75 kPa in a low pressure turbine. Determine:
a. the moisture content at the inlet of the condanger.
b. the met works per unit mare of steam tomane In Site.
c. the heat transter to the steam in the boter in lal per ke of steam.
d. the thermal efficiency
e. the heat transfer to cooling water passing through the condenser, in kJ per kg of steam flowing.

Answers

The dryness fraction is 0.96. Using steam tables the enthalpies at points 2, 3, and 4 can be calculated as 2936.4 kJ/kg, 2892.3 kJ/kg, and 1039.2 kJ/kg, respectively. The value of q is found to be 1438.3 kJ/kg.

a) 0.2, b) 2687 kJ/kg, c) 0.16 kJ/kg.K, d) 32%, e) 2549.52 kJ/kgPart (a): The steam is superheated at 300°C and 3 MPa, using steam tables it can be seen that the dryness fraction is 0.96.Part (b): This can be calculated using the formula shown below. The net work done by the turbine is given as follows: Net work = m (h1 - h2) + m (h3 - h4) Where m is the mass of the steam entering the turbine and h1, h2, h3, and h4 are the enthalpies at the different points in the cycle.h1 is given as 3478 kJ/kg, and using steam tables the enthalpies at points 2, 3, and 4 can be calculated as 2936.4 kJ/kg, 2892.3 kJ/kg, and 1039.2 kJ/kg, respectively.

Substituting the values in the formula gives the answer as 2687 kJ/kg.Part (c): Heat transfer per unit mass of steam to the boiler can be calculated using the formula shown below:q = h1 - h4 The value of q is found to be 1438.3 kJ/kg. Part (d): The thermal efficiency of the cycle can be calculated using the formula shown below: Efficiency = Net work output/ Heat inputHeat input can be calculated as follows: Heat input = m (h1 - h4) + m (h3 - h2) The value of heat input is calculated to be 4485.4 kJ/kg Substituting the values in the formula gives the answer as 32%.Part (e): The heat transfer to cooling water passing through the condenser is given as follows:q = m (h4 - h5)Where h4 is 1039.2 kJ/kg and h5 is 48.72 kJ/kg. The value of q is calculated to be 2549.52 kJ/kg.

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What is the acceleration of a bike which increases its speed from 0 to 40 ft/s in 4 seconds?

Answers

The acceleration of a bike which increases its speed from 0 to 40 ft/s in 4 seconds will be 3 m/s².

How do you determine the acceleration of the bike?

Given, initial speed (u) = 0

Final speed (v) = 40 ft/s = 12 m/s

Time taken = 4 seconds

From the equation v = u + at, we have

12 = 0 + a x 4

12 = 4a

a = 3 m/s²

The acceleration formula is what?

The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t). This enables you to calculate the change in velocity in meters per second squared (m/s²). Since acceleration is a vector quantity, both its magnitude and its direction are included.

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How does the motion of the atoms in the spoon change when the spoon is placed in the hot coffee?
А
The atoms vibrate faster due to the conduction of heat through atoms in the spoon.
B
The atoms vibrate slower due to the conduction of heat through atoms in the spoon
С
The atoms move closer toward each other due to the radiation of heat through atoms in the spoon.
D
The atoms move away from each other due to the convection of heat through atoms in the spoon.

Answers

Answer:

A.The atoms vibrate faster due to the conduction of heat through atoms in the spoon.

A kid pushes a stationary
merry-go-round, creating an
acceleration of 0.135 rad/s^2.
How much time does it take the
merry-go-round to complete
2.00 rotations?
(Unit = s)
Remember: CCW is +, CW is. 1 rev= 2*pi rad

Answers

The merry-go-round takes approximately 29.41 seconds to complete 2.00 rotations.

Given data:

Acceleration (α) = 0.135 rad/\(s^2\)

Number of rotations (θ) = 2.00

To find the time taken (t) for 2.00 rotations, we need to use the formula:

θ = 0.5 * α * \(t^2\)

Rearranging the formula, we get:

\(t^2\) = (2 * θ) / α

Plugging in the given values, we have:

\(t^2\) = (2 * 2.00) / 0.135

\(t^2\) = 29.63

Taking the square root of both sides, we find:

t ≈ √29.63

t ≈ 5.439

Therefore, the time taken for the merry-go-round to complete 2.00 rotations is approximately 5.439 seconds.

Note: It's important to round the final answer to an appropriate number of significant figures, considering the given data. In this case, we have used four significant figures in the final answer.

However, if we want to adhere to the given significant figures in the acceleration (0.135 rad/\(s^2\)), the answer should be rounded to three significant figures. In that case, the final answer would be approximately 5.44 seconds.

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an unknown substance is measured to be 2.5 lbs. which is the correct way to convert this mass in pounds (lb) to kilograms (kg)?

Answers

The substance is measured to be 2.5 lbs, the correct way to convert this mass in pounds (lb) to kilograms (kg)is as follow:

We can use the conversion factor 1 lb = 0.45359237 kg

Here is the correct way to convert the mass in pounds to kilograms:

Step-by-step solution: mass of the unknown substance = 2.5 lbs

We know that,1 lb = 0.45359237 kg

To convert the mass in pounds to kilograms, we can use this conversion factor.So,

2.5 lbs * 0.45359237 kg/lb = 1.133980925 kg

Therefore, the mass of the unknown substance in kilograms is 1.133980925 kg (rounded to nine decimal places).

Hence, the correct way to convert the mass in pounds (lb) to kilograms (kg) is 1 lb = 0.45359237 kg.

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What do you understand if the frequency of a sound is 70 Hz? ​

Answers

Answer:

see below

Explanation:

frequency of a wave is the number of complete waves produced per second

so 70 Hz

means, that 70 complete waves are produced in one second,

hope this helps

interference fringes from a two slit experiment immersed in water will be closed together than when it is operated in air. this is because

Answers

The interference fringes from a two-slit experiment immersed in water will be closer together than when it is operated in air because the wavelength of light in water is shorter than its wavelength in air.

This is due to the difference in refractive index between water and air, which causes light to slow down and bend when it enters water.

The refractive index of a medium is a measure of how much the speed of light is reduced in that medium compared to its speed in a vacuum. The refractive index of water is higher than the refractive index of air, which means that light travels more slowly in water than in air. Since the speed of light is reduced in water, the wavelength of light in water is also reduced according to the relation:

λ(water) = λ(air) / n

where λ(water) and λ(air) are the wavelengths of light in water and air, respectively, and n is the refractive index of water.

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According to the Big Bang theory
a. dark matter is changing to ordinary matter throughout the universe.
b. dark energy is pulling the universe into black holes.
c. the universe will someday end because of a "big bang."
d. the universe began with an enormous explosion.

Answers

Answer:

D. the universe began with an enormous explosion.

Explanation:

This theory states that the universe began as a single hot, dense, and small point. It then exploded, expanded, became less dense, and the temperature became cooler.

Hope this helps! :)

how much voltagr is required to make 4 amperes flow throgh a resistance of 20 ohms?

Answers

To make 4 amperes flow through a resistance of 20 ohms, 80 volts of voltage are required.

Ohm's law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. In other words, the greater the voltage, the greater the current that flows through a given resistance.


The voltage required to make 4 amperes flow through a resistance of 20 ohms can be calculated using Ohm's law:

Voltage (V) = Current (I) x Resistance (R)

Therefore, V = 4 A x 20 Ω = 80 V

So, to make 4 amps flow through a resistance of 20 ohms, 80 volts of electricity are required.

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in the compound CaCO3 at the end of the compound represents the number of

Answers

Answer:

Calculate the mass of 6.022 × 1023 molecule of Calcium carbonate (CaCO3).

Solution —

Molar mass (Molecular mass in gram) of CaCO3 = 40+12+3×16 = 100 g

No. of moles of CaCO3

= No. of molecules/Avogadro constant

= 6.022 × 1023/ 6.022 × 1023

= 1 mole

Mass of CaCO3

= No. of moles × molar mass

= 1 × 100 g = 100 g.

When wood burns, a small amount of ashes is produced and gas is given off. How does this reaction demonstrate the law of conservation of mass?.

Answers

The law of conservation of mass states that matter can neither be created nor destroyed. When wood burns, the mass of the wood is converted into a small amount of ashes and gas. The total mass of the ashes and gas is equal to the mass of the wood before it was burned, demonstrating that the law of conservation of mass holds true.

answered

just now

define electrical resistance in a metal conductor​

Answers

Answer:

Resistance is defined as the property of a conductor to resist the flow of charges through it. The resistance of conductor is numerically given as the ratio of potential difference across its length to the current flowing through it.

Explanation:

which form of energy in the circuit lights the bulb.?​

Answers

Answer:

electric energy.......

PLEASE HELP!! HURRYY

If a step down transformer has 220 V coming into the primary coil of 30 turns and 140 V is coming out of the second coil, how many turns in are in the secondary coil?


a.) 30

b.) 19

c.) 0.05

d.) 7

Answers

Answer:

We can use the formula for the transformer voltage ratio, which states that the ratio of the number of turns in the primary coil to the number of turns in the secondary coil is equal to the ratio of the output voltage to the input voltage:

Np/Ns = Vp/Vs

where Np is the number of turns in the primary coil, Ns is the number of turns in the secondary coil, Vp is the input voltage, and Vs is the output voltage.

We know that Vp = 220 V and Vs = 140 V, and we are trying to find Ns. We also know that Np = 30, since that is the number of turns in the primary coil. Substituting these values into the formula, we get:

30/Ns = 220/140

Simplifying the right side of the equation, we get:

30/Ns = 11/7

Cross-multiplying, we get:

11Ns = 210

Dividing both sides by 11, we get:

Ns = 19

Therefore, the answer is b.) 19.

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this component should be consistent with and not contradict accompanying words. when these are grossly inappropriate or contradictory, communication can permanently damage healthy relationships. Find an equation for the line below. the nurse performs an admission assessment on a client with a diagnosis of tuberculosis. the nurse should check the results of which diagnostic test that will confirm this diagnosis? Let p = Two lines are parallel.Let q = Slopes are equal. Statement: If two lines have slopes that are equal, then the lines are parallel.Which of the following is the symbolic representation of the given statement? a. p qp qb. q pq pc. p qp qd. q p Susan's paycheck this month says her gross pay was $400 and net pay was $350. What's the best explanation for why those two numbers are different? 6x+9+2x-1someone help me In the U.S. population over eighteen years of age in the mid-2010s, about 12% of people had less than a high school education. In prison, however, ______ had less than a high school education. Which is an effect of first-person narration? A. The writing cannot control shifts in time and place.B. The reader is likely to notice the way the character speaks.c. The reader feels more distanced from the characters and events.D. The writing is more likely to use specific, vivid detail. Hydraulic fracturing uses water and chemicals under high pressure to fracture layers of rock that contain oil or natural gas. This relatively new technology increased the accessibility of ________ that were historically viewed as not worth the effort to mine. Bill wants to reach valuable, relevant audiences and engage with them quickly and often with his ads. How will creating a Display Ads campaign allow him to reach his goal? PLEASE HELP 20 POINTSWhat different types of photographic media (e.g., sports, fashion, etc.) exist? Identify and describe at least five different types of photographic media, providing an example of where or in what context you might see this type of photographic media in the world. In this problem, assume Newton's Law of Heating/Cooling applies. A pot with liquid at 23 C is placed in a cooler held at 2 C, and after 4 minutes the temperature drops to 19 C. How long until the liquid becomes 5 C? Give your answer to the nearest minute. the nurse is caring for a 2-year-old child who has been having frequent diarrhea. what actions are appropriate? select all that apply. which of the following is an environmental variable in interactional psychology? a. ethics b. attitudes c. values d. personal life Solve the following inequalities; a. 4x+15 >27 Shortage of food plants, erosion of land, and decrease in oxygen levels are all effects ofImmigrationDeforestationMiningTrade Solve.x +y + 2z=32x 2y 3z = 23x - y - 2z=1Enter your answer, in the form (x, y, z). in the boxes Why were bacteria given their own Kingdom? What is an interior obtuse angle The definition of energy is the ability to ___________.(Hint: one word)