the question of why is the universe so perfectly close to critical density is known as the problem.

Answer:In the case of burning wood, stored potential energy (in the form of chemical energy) in the log is released due to heating by other excited atoms. This chemical reaction is called combustion and requires oxygen. Combustion changes the potential chemical energy into kinetic energy in the form of heat.

Explanation:

Answer:

In the case of burning wood, stored potential energy (in the form of chemical energy) in the log is released due to heating by other excited atoms. This chemical reaction is called combustion and requires oxygen. Combustion changes the potential chemical energy into kinetic energy in the form of heat.

Last guy copied off my computer when i left room

Explanation:

1. The three types of crystal structures are cubic, hexagonal, and tetragonal, 2.  A needle may float on clean water due to surface tension, and 3. Two applications of surface tension are Insect locomotion and capillary action.

1. Three types of crystal structures with two examples each are:

Cubic: NaCl (rock salt), diamond

Hexagonal: graphite, quartz

Tetragonal: zircon, tin dioxide

2. A needle may float on clean water due to surface tension. However, when detergent is added to the water, the surface tension is reduced, and the needle sinks due to the increased weight of the needle.

3. Two applications of surface tension are:

Insect locomotion: Insects such as water striders are able to walk on water due to the high surface tension of water. The insects use their weight and hydrophobic legs to create small depressions in the water surface, which increases the surface tension and allows them to stay afloat.

Capillary action: Capillary action is the ability of a liquid to flow in narrow spaces against the force of gravity. This phenomenon is due to the surface tension of the liquid, which causes it to rise in narrow tubes or porous materials. Capillary action is used in many applications, such as in wicking materials for candles, in paper chromatography for separating mixtures, and in plants for transporting water and nutrients from the roots to the leaves.

Therefore, NaCl, diamond, graphite, quartz, zircon, and tin dioxide are a few examples of the three main types of crystal structures: cubic, hexagonal, and tetragonal. Applications where liquids must flow in constrained places against the pull of gravity, such insect locomotion and capillary action, depend on surface tension. Surface tension allows a needle to float on water, but when detergent is added, it lowers surface tension and makes the needle heavier, which makes it sink.

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The more  a star has, the shorter its main sequence life. "The mass-luminosity relation, which is used to describe the relationship between a star's mass and its luminosity, tells us that the more massive a star is, the brighter it is.

However, the mass of a star also determines how long it spends on the main sequence. A star spends most of its life in the main sequence, a stage during which it fuses hydrogen in its core to produce helium. The amount of time a star spends on the main sequence is determined by its mass, with more massive stars having shorter lifetimes than less mass stars.

As a result, the more massive a star is, the shorter its main speed life, which means that option D, "the more mass a star has, the shorter its main sequence life," is the correct answer. The other options, "all stars have the same ages," "all stars have equal life spans," and "none of the above," are all incorrect because they do not accurately describe the relationship between a star's mass and its main sequence lifetime.

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Answer:

D by plane

Explanation:

by car is 64 h is not less day the same for the truck and ship is very long

by train is impossible the train Srinagar-Kerala not exist

Is only possible by plane

The volume would liquid have had, 15.067 mL

The density of an object can be calculated as mass divided by volume, or ρ = m/V.

If the unknown liquid had been water, its density would have been equal to 0.9982 g/mL.

Let's call the volume of the unknown liquid V1 and the volume it would have had if it were water V2.

Then, we can write:

m/V1 = 0.9982 g/mL

where m is the mass of the unknown liquid, which is 15.000 g.

Rearranging the equation, we can find V1:

V1 = m/0.9982 g/mL

= 15.000 g / 0.9982 g/mL

= 15.067 mL

So, the volume of the unknown liquid if it had been water would have been 15.067 mL.

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The flow of thermal energy from the hot water to the colder hand and the surrounding air is evident when you hold a 65oc cup of water, and your hand is 37oc, and the outside air is 6oc.

Thermal energy is transferred from an object with a higher temperature to one with a lower temperature through three different mechanisms: conduction, convection, and radiation.Conduction is the transfer of heat through materials in contact with one another. The cup of hot water conducts heat to your hand when you hold it. In this scenario, thermal energy flows from the hot water to the hand through the cup. The thermal energy is conducted from the hot water to the cup and then from the cup to your hand.Convection is the transfer of heat through a liquid or gas caused by the movement of matter. The heat from the hot water also causes the air above it to expand and become less dense, and the cooler air surrounding it flows downward to take its place. The movement of air, or convection, enables the transfer of heat from the hot water to the surrounding air.Radiation is the transfer of energy through electromagnetic waves. The heat from the hot water is radiated out into the air and absorbed by the surrounding air molecules, allowing the transfer of heat from the hot water to the colder air. Radiation does not require the movement of matter, unlike conduction and convection. The energy transfer from the hot water to the colder hand and air around it follows the basic laws of thermodynamics. Energy is never created or destroyed; rather, it is transferred from one object to another.Heat is transferred from hot water to cooler air and your hand when you hold a 65oc cup of water, and your hand is 37oc, and the outside air is 6oc. Thermal energy can be transferred in three ways: conduction, convection, and radiation. Thermal energy moves from the hot water to your hand and the surrounding air by conduction. Convection is the movement of air caused by the heat energy that passes from the hot water to the surrounding air. Radiation is when heat energy is transferred through electromagnetic waves, such as the heat energy radiating from the hot water to your hand and the surrounding air.

The thermal energy in the cup of hot water flows to your hand and the surrounding air by conduction, convection, and radiation. The thermal energy flows from an object with a higher temperature to one with a lower temperature. Conduction occurs when the thermal energy is transferred through the contact of materials. Convection is when the thermal energy moves through the movement of air or fluid. Radiation is the transfer of energy through electromagnetic waves.

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The magnitude of the gravitational force on mass M is: F = G * (M * m) / (L^2 + d^2)

To find the magnitude of the gravitational force on mass M, we will use Newton's Law of Universal Gravitation. The formula for this is:
F = G * (M * m) / r^2
Where F is the gravitational force, G is the universal constant of gravitation, M and m are the masses of the objects, and r is the distance between their centers.

Given the information in the question, we have:
M = mass of the larger object
m = mass of the smaller object
L = distance between the centers of the two objects in the horizontal direction
d = distance between the centers of the two objects in the vertical direction

We need to find the total distance r between the centers of the objects. To do this, we can use the Pythagorean theorem:
r^2 = L^2 + d^2
Now, we can plug this into our gravitational force formula:
F = G * (M * m) / (L^2 + d^2)

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Answer: So, our current when our switch is open is going to be equal to the voltage across the resistors, and that's going to be our 12 volts, 12 volts, divided by the equivalent resistance of these resistors. When the switch is open, essentially, we just have R1 and R2 in series, and so this is just gonna be R1+R2.

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To find the car's initial velocity, we can use the equation of motion:

final velocity = initial velocity + (average acceleration × time)

Given that the final velocity is 15.5 m/s, the average acceleration is 3.19 m/s², and the time is 2.73 seconds, we can substitute these values into the equation:

15.5 m/s = initial velocity + (3.19 m/s² × 2.73 s)

To solve for the initial velocity, we need to isolate it on one side of the equation. Let's start by multiplying the average acceleration and the time:

15.5 m/s = initial velocity + 8.7187 m/s

Now, we can subtract 8.7187 m/s from both sides of the equation to isolate the initial velocity:

15.5 m/s - 8.7187 m/s = initial velocity + 8.7187 m/s - 8.7187 m/s

6.7813 m/s = initial velocity

Therefore, the car's initial velocity is 6.7813 m/s.

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The book value of the car washing machine at the end of year 3 would be $3,266.66.

The book value of an asset at the end of its useful life can be calculated using the MACRS depreciation method. MACRS stands for Modified Accelerated Cost Recovery System, which is a tax depreciation method used in the United States.

To calculate the book value at the end of year 3, we need to know the depreciation rate for a 3-year asset under MACRS. The depreciation rate for a 3-year asset is 33.33% for each year.

Using this depreciation rate, we can calculate the depreciation expense for each year. In this case, the machine cost $9,800. So, the depreciation expense for year 1 would be $9,800 * 33.33% = $3,266.67. Similarly, the depreciation expense for year 2 would be $9,800 * 33.33% = $3,266.67.

To find the book value at the end of year 3, we need to subtract the total depreciation expense for the first 3 years from the original cost of the machine. The total depreciation expense for 3 years would be $3,266.67 + $3,266.67 = $6,533.34.

Therefore, the book value at the end of year 3 would be $9,800 - $6,533.34 = $3,266.66.

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The radius of a sphere is the distance between the centre point of the sphere to the surface of the sphere.

r = d / 2

A = 4 π r²

r = √ ( A / 4 π )

V = 4 / 3 π r³

r = ∛ ( 3 V / 4 π )

r = Radius of the sphere

d = Diameter of the sphere

A = Surface Area of the sphere

V = Volume of the sphere

A sphere is the 3-dimensional form of a circle. Since the radius of the sphere is a measure of length, its unit is usually meter.

Therefore, the radius of a sphere is the distance between the centre point of the sphere to the surface of the sphere.

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Answer:

yes

Explanation:

All Motion is relative to a reference point. Object appears to move whether object moves, the reference point moves, or both move. is the distance traveled by an object over the period of time in which it moved. Ex - a racecar driver completes a three-mile lap in 60 seconds.

The statement "All Motion is relative to a reference point." is True.

An inertial frame of reference is a frame of reference in which the Newton's laws are valid. In this frame of reference, the objects do not accelerate without any external force. All frames of reference moving with constant velocity are considered stationary.

In a non-inertial frame of reference, the Newton's laws will not work. They are moving with an acceleration.

All Motion is relative to a reference point. Object appears to move, the reference point moves, or both move is the distance traveled by an object over the period of time..

Thus, the statement "All Motion is relative to a reference point." is True.

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12). When you move your hand or foot, your body has converted potential energy into kinetic energy.

13). When coasting while roller skating, you eventually stop due to

friction causes kinetic energy to transfer to thermal energy.

14).  A ball has 100 J of potential energy when it is on a shelf. The kinetic energy of the ball the instant it hits the floor is Kinetic increases, potential decreases.

Kinetic energy is the force that propels motion, which can be seen in the movement of a particle, an object, or a group of particles. A person walking, a baseball being thrown, a piece of food falling from a table, and a charged particle in an electric field are all examples of objects in motion that use kinetic energy.

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She is caught in a wind that blows toward the equator from about 30° N and 30° S of the equator. She is in the trade wind. This science is called Hadley cell.

It follows the movement of wind blows from one direction to the other such as the one which blow from north to south or east to west. The trade wind are produced by warm moist air rising near the equator.

Now, within the context of the task given above, when the movement wind which blows toward the equator from about 30° N and 30° S of the equator is known as the trade wind.

So therefore, the movement of wind from the same certain degrees from North and South is called trade wind.

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The angular acceleration of a spinning amusement park ride is 0.2 rad/s^2.

The pace at which an object moving in a circle changes angular velocity over time is referred to as angular acceleration. Rotational acceleration is another name for angular acceleration. It has both magnitude and direction, making it a vector quantity.

The rate of change in angular displacement is known as angular velocity, and the rate of change in angular velocity is known as angular acceleration.

Zero magnitude acceleration is still acceleration. Motion with uniform (i.e. zero) acceleration is a specific case of motion with constant velocity.

Given:

Initial acceleration = 0.50 rad/s

Final acceleration = 0.60 rad/s

Time = 0.50 s

Angular Acceleration:

α = Δω/Δt

\(\alpha = \frac{0.60-0.50}{0.50}\)

\(\alpha =\frac{0.1}{0.50}\)

\(\alpha =0.2rad/s^2\)

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Answer:

extrusive igneous rock

Answer:

Science and technology have had a major impact on society, and their impact is growing. By drastically changing our means of communication, the way we work, our housing, clothes, even the length, and quality of life itself, science has generated changes in the moral values and basic philosophies of mankind.

Explanation:

The speed of the rock when it hits the ground vd is greater than the speed of the rock when it is thrown upward vu(vd>vu).

The rock will eventually reach its maximum height above the ground if thrown upward. It will fall back to the ground at the same vertical height at which it was thrown at a speed of 15 m/s. The rock's speed will increase above its initial speed of 15m/s as it continues to fall 100m below its initial vertical position.

Velocity is the rate of change in the position of an object in motion as measured by a specific time standard (e.g., 60 km/h northbound). Velocity is a key concept in kinematics, the branch of classical mechanics that studies body motion.

Velocity is a physical vector quantity that must be defined by both magnitude and direction. Speed is a coherently derived unit whose quantity is measured in the SI (metric system) as meters per second (m/s or ms1). For example, "5 m/s" is a scalar, whereas "5 m/s east" is a vector.

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Answer:

[Ne] 3s² 3p¹

Explanation:

Answer: 1s2 2s2 2p6

Explanation:

The aluminum ground state would be 1s2 2s2 2p6 3s2 3p1.

However, the Aluminum Ion electron configuration would be 1s2 2s2 2p6 as it has LOST 3 electrons to have the noble gas configuration of Neon (Ne)

The momentum of the pellet just before it hits the modelling clay is 0.0816 kg-m/s the velocity of the pellet just before it hits the modelling clay is 40m/s.

Assumption:

1)the pallet embeds into the clay.

A perfectly inelastic collision is one where the two objects that collide together become one object, losing the maximum amount of kinetic energy.

e=0

In perfectly inelastic collision the momentum is conserved.

given:

velocity of the truck + clay = 0.8m/s

mass of the truck + clay = 0.1 kg

mass of the pallet = 2g=0.002kg

a)

now since the example is of perfectly inelastic collision the momentum will be conserved .

i.e. momentum before collision  = momentum after collision

momentum of pallet =  momentum of( truck + clay)

momentum of pallet = (0.1+0.002)×0.8

momentum of pallet =0.0816 kg-m/s

b)

momentum before collision= mass of pallet ×velocity of pallet  + mass of truck × velocity of truck

velocity of pallet =0.0816/0.002

velocity of pallet =40m/s

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Yes, force can be expressed in units of pounds and newtons.

Force is an effect of the mass of object to accelerate in particular direction and can be expressed in the unit of pounds according to the FPS system of units. Newton is also a unit to express the force. SI unit of force is the newton and symbol is N.

Convert weight measured in pounds to equivalent in Newtons. In the formula for the determination of mass based on weight, mass is measured in Newtons. Weight is measured in Kilograms, and acceleration of gravity on Earth is measured as 9.8 meters per second squared and these are metric system unit measurements.

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The mass of Planet Z can be determined using the formula for the acceleration due to gravity. The free-fall acceleration 1900 km above Planet Z's north pole can be calculated by considering the change in distance from the planet's center.

To calculate the mass of Planet Z, we can use the formula for acceleration due to gravity, which states that the acceleration is directly proportional to the mass and inversely proportional to the square of the distance from the center of the planet. Given that the diameter of Planet Z is 9000 km, we can calculate the radius by dividing the diameter by 2. Using the formula for acceleration due to gravity, we can solve for the mass of the planet.

To determine the free-fall acceleration 1900 km above Planet Z's north pole, we need to consider the change in distance from the planet's center. Since the free-fall acceleration is inversely proportional to the square of the distance, we can calculate the new acceleration by substituting the new distance into the formula. By considering the distance above the planet's north pole, we can find the corresponding free-fall acceleration at that point.

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Answer:

Good one

Explanation:

Hydrogen has the highest thermal conductivity of any gas.

From the table shown we can see that the substance that has a density of 10.50g/cm³ is Silver. Hence the required substance is silver

Density is the ratio of the mass of an object to its volume. Mathematically,

Density = Mass/Volume

Given the following from the question

Mass = 273g

Volume of water = 26mL

Convert the volume to cm³

1ml = 1cm³ Hence;

26mL = 26cm³

Get the density of the object

Density = 273g/26cm³

Density = 10.50g/cm³

Hence the required density is 10.50cm³. From the table shown we can see that the substance that has a density of 10.50g/cm³ is Silver. Hence the required substance is silver

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Answer: Riding a bike to the park

Explanation:

Answer:

C: Valence electrons are transferred from a metal to a nonmetal

Explanation:

In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

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