Molecules in a solid

A. are harder than molecules in liquids or gases.
B. transfer heat to their neighbors by a process called convection.
C. have no internal energy because they are not moving around.
D. are held in nearly fixed positions by strong attractive forces.

Answer:

2nd statement is answer

Explanation:

Answer:

B. The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.

Explanation:

got it right on t4l :D

The energy consumption per hour of the heater is 9 kJ/hour and the energy consumption per hour of the electric motor is 3 kJ/hour.

Let's denote the energy consumption per hour of the heater as "h" and the energy consumption per hour of the electric motor as "m".

From the first piece of information, we can set up the equation:

2h + 4m = 25 (equation 1)

Similarly, from the second piece of information, we can set up another equation:

3h + 2m = 18 (equation 2)

We now have two equations with two unknowns, which we can solve using algebraic methods. Multiplying equation 2 by 2 and subtracting it from equation 1 multiplied by 3, we get:

(3h + 6m) - 2(3h + 2m) = 25(3) - 18(2)

Simplifying this expression, we get:

h = 9

Substituting this value of h into equation 2, we get:

3(9) + 2m = 18

Simplifying this expression, we get:

m = 3

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Using principles in Physics the way in which air bags can reduce the chance of death or injury is that the airbag increases the time over which the velocity of the head changes so that the acceleration is reduced, and thus the force is reduced.

This is referred to as a vehicle occupant-restraint system using a bag designed to inflate extremely quickly, then quickly deflate during a collision.

The gas in the bag can only leave at a certain rate which makes it deflates slowly, and the time duration of the deceleration increases which therefore leads to the force being reduced during a collission and reduces the risk of injury.

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Answer:

Explanation:

Potential Energy =  m * g * h =  .6 * 9.8 * 35 = 205.8 J

Answer:

swinging on a swing, a ball dropping, a rollercoaster goinf down from a hill, or a bus driving

Explanation:

Octave is the interval between two notes of the same name, where the higher note has double the frequency of the lower note. It is characterized by a similar sound quality, albeit at a higher pitch.

The concept of an octave is fundamental in music theory and forms the basis for understanding scales, harmonies, and chords. When two notes are separated by an octave, they exhibit a harmonic relationship and possess a sense of similarity in their tonal characteristics. This relationship is based on the doubling or halving of the frequency, resulting in a perceptual equivalence between the two notes. Musically, octaves play a crucial role in creating harmony, melody, and tonal color.The interval between two notes (one higher than the other) of the same name that have a similar sound because the upper has exactly double the sound vibrations per second of the lower is called an octave.

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Technology and science support one another's advancement. New technologies are developed using scientific knowledge. New technology frequently enable scientists to examine nature in novel ways and generate novel findings.

By introducing a new area of scientific inquiry, a change in technology can have an impact on our understanding of science. For instance, the development of the microscope allowed biologists to study species that were invisible to the eye, resulting in the development of the field of microbiology.

Building new technologies with the use of scientific information frequently leads to new observations being made about the world, which in turn leads to the development of even more scientific knowledge.

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Answer:

m = 3.8 kg

Explanation:

p = m × v

95 = m × 25

25m = 95

m = 95/25

m = 3.8 kg

Answer:

6 types of energy and their transfers are noted:  nuclear, light, chemical synthesis, chemical decomposition, mechanical , potential, and kinetic, along with an explanation.

Explanation:

Each energy transition is noted with a "*#."

1.  Lets start with the solar system's sun.  It is comprised of hydrogen and helium atoms that collide with enough force to join and become different elements.  The nucleus is broken apart and particles rearrange to form a new atom, perhaps berylium.  Some of the energy holding the nucleus together is released in the form of heat and light.  The energy in the nucleus is relesased in a nuclear reaction  *1.

*1  Nucleus of an atom releases energy as heat and light.

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The light from the sun goes all directions.  A portion hits the Earth during the daylight hours.  Life has evolved on Earth to to the point that certain plants and some other organisms can capture the light energy.  Trees are a good example.  The chlorophyll in trees is able to capture the light energy and use it to synthesize compounds such as sugars (photosynthesis).  The energy is used to create the bonds of the elements in a sugar molecule.  *2 The process of photosynthesis makes structural compounds as well as sugars.  The sugars carry the stored chemical energy to other parts of the plant involved with metabolism.  When energy is required, the sugars are metabolized into smaller compounds, releasing the energy from the former chemical bonds.

  *2  Chemical energy contained in chemical bonds

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Trees also contain complex polymeric celluloses that are made of of complex molecules with many high-energy bonds.That energy may be released if the wood is burned. *3 A small amount of heat, known as the activation energy (e.g., a match), can cause the bonds to break and release even more heat.  This results in fires, which is the conversion of chemical energy into heat and light.

*3.  Decomposition (sometimes combustion)  is the release of chemical energy as heat and light.

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The heat from a fire may be used to boil water and make steam.  The ability of steam to create pressure on a piston to create movement is the foundation of the industrial revolution.  This is the conversion of chemical energy to heat and then heat to mechanical motion.  

*4.  Conversion of heat to mechanical motion energy.

Stem engines do many tasks.  One is to raise materials such as structural beams to heights above ground for the construction of building.  The mechanical energy is tranferred into potential energy.  *5 This is the energy contained in an object above Earth's surface.  It can be recovered with the object comes back to Earth, if it were attached to a pulley that is used to lift something.

  *5.  Conversion of Mechanical energy to potential energy

An object above Earth has a potential energy that can be coverted to kinetic energy.  If the object is allowed to drop, the potential energy is conveted into kinetic energy.  *6 Physics and Chemistry have formulas that can precisely predict the speed and trajectory of such objects.  They are based on the value for potential energy being converted to kinetic energy which is the speed of the object.

  *6 Conversion of Potential energy to kinetic energy

Fire (Chemical energy → Heat and Light) Electric lamp (Electrical energy → Heat and Light) Microphone (Sound → Electrical energy) Wave power (Mechanical energy → Electrical energy)

Energy is characterised as having the "ability to accomplish work, which is the capacity to apply a force sufficient to move an object." Despite this unclear definition, the concept is actually quite straightforward energy is just the force that moves objects. Potential and kinetic energy are the two different categories.

It is possible to change the form of energy. Examples Our cars are filled with gasoline (chemical), which, with the aid of electrical energy from a battery, produces mechanical (kinetic) energy. Our TVs are powered by purchased electricity, which is then transformed into light and music.

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The date used to establish lien priority for a mechanic's lien is E. essential in determining which party has priority in case of a property dispute.

Lien priority is not determined by the date of the first mortgage payment after the mechanic's work has been completed. Instead, it depends on the beginning or ending of the mechanic's work as per state law or the date of recording the lien. Lien priority is crucial because it helps to resolve disputes between multiple parties with claims on the same property. The priority typically follows a first-in-time, first-in-right rule, meaning the lien that is recorded or filed first will have priority over those recorded later, this rule is followed in most jurisdictions, but specific state laws may slightly vary.

In some cases, the lienee borrows money to pay the debt, and the date of the loan may also be relevant in determining lien priority. However, it is essential to remember that the key factor remains the date of recording the lien or the date of beginning or ending the mechanic's work, as dictated by state law. Therefore, to establish lien priority for a mechanic's lien, one must consult the specific state's regulations and consider the relevant dates. So, the correct answer is E. essential in determining which party has priority in case of a property dispute.

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The 500 grams of ice content of the kettle get to the boiling point in 22 minutes.

It will take longer to reach a rolling boil when using more water than when using less. Faster boiling occurs with hotter heat sources. Water will boil if it is heated to a higher temperature during the boiling process.

Diagram 1. A gram-me of water may be heated by one degree by applying 4.186 J (1 calorie) of energy, or the specific heat capacity, to it. is the shift in the system's temperature.

We have,

m = 0.5kg, time = 22 minutes = 1320 seconds

We know that

Power = W/t

500 = W(heat)/1320

Heat((Q)) = 660000J

Then, Q = mcΔT

660000 = 0.5 × 4180 × (T + 10)

T + 10 = 315.78 degree

T = 305.78 degree

Thus, water can boil at 100 degree,so in 22 minutes water will get to boiling point.

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The smallest number of cubes needed is 28. This forms a 3x3x3 cube with one central cube missing.

To minimize the number of protruding snaps while maximizing the number of receptacle holes, the cubes should be arranged in a 3x3x3 cube formation.

This structure would have 27 cubes, but one central cube must be removed to eliminate all protruding snaps.

Each of the remaining 26 cubes will have at least one side with receptacle holes facing outward.

The missing central cube ensures no protruding snaps are exposed.

Therefore, the smallest number of snap-together cubes needed to have only receptacle holes showing is 28.

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Answer:

Acceleration of the box is 5.88 \(ms^{-2}\)

Explanation:

Given weight, W= 50 N

We know,

W=mg

∴m=W/g

     =50/9.8

     = 5.10 kg

According to the stem,

W - air resistance = ma

or, 50-20=5.1a

or, 5.1a=30

or, a=30/5.1

∴a=5.88 \(ms^{-2}\)

The that is happening inside a star while it expands into a subgiant  is that it is fusing hydrogen into helium in a shell outside the core.

The expansion of the outer layers of the star into the subgiant size  can be seen as one that is balance and bring aboput  the increase of energy generated by the hydrogen shell fusion wehich do make the star to nearly maintain its surface temperature.

It shopuld be noted that it causes the spectral class of the star to change very little  and this can be felt from the lower end of this range of star mass.

In conclusion, the Fusion as described can be seen as one that do occurs when two atoms slam together so the formation of the heavier atom,  can be acheied as seen in the way the hydrogen fuss into helium in a shell outside

Therefore, the second option is correct.

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Answer:

Explanation:

Both are contact forces arising at the interface between two bodies. In the fluid this interface might be irregular, and it completely surrounds a submerged object. For a solid it is usually a single flat surface - but it can be a collection of surfaces, which do not need to be flat or regular, and which can surround the object

Upthrust occurs at a fluid-solid interface whereas normal reaction occurs at a solid-solid surface. However, it is possible to generate the same fluid-like phenomenon of upthrust by immersing a solid object in sand or small beads and agitating them to simulate the pressure of atoms. With 

Answer:

1100 kg

Explanation:

500 lb x 2.20lb (1kg) =1100kg

The linear acceleration of the car wheel is 0.735 m/s².

The linear acceleration of a point on the rim of a wheel is related to the angular acceleration of the wheel by the equation:

a = rα

Where "a" is the linear acceleration, "r" is the radius of the wheel, and "α" is the angular acceleration.

Given the data in the question;

Plug the given values into the above formula and solve for the linear acceleration of wheel.

a = r × α

a = 0.3 m × 2.45

a = 0.735 m/s²

Therefore, the linear acceleration is 0.735 m/s².

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The velocity of the truck after the collision is 5.6 kmph.

The rate at which an object's position changes when observed from a specific point of view and when measured against a specific unit of time is known as its velocity.

The velocity of the truck after the collision can be calculated using the conservation of momentum principle. The principle states that the total momentum of an isolated system remains constant if no external forces act on it.

Momentum is calculated as mass * velocity (p = m * v)

Before the collision, the momentum of the car is m1 * v1 = 400 kg * 72 kmph = 28800 kgkmph

and the momentum of the truck is m2 * v2 = 4000 kg * 9 kmph = 36000 kgkmph

After the collision, the momentum of the car is m1 * v'1 = 400 kg * 18 kmph = 7200 kg*kmph

Now we use the principle of conservation of momentum to find the velocity of the truck after collision.

momentum before collision = momentum after collision

m1 * v1 + m2 * v2 = m1 * v'1 + m2 * v'2

28800 + 36000 = 7200 + m2 * v'2

64800 = 7200 + m2 * v'2

v'2 = (64800 - 7200) / 4000 = 5.6 kmph

Therefore, the velocity of the truck after the collision is 5.6 kmph.

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The net torque on the pulley about the axle would be -0.20 Nm.

Torque is defined as a twisting or turning force that causes rotation around an axis, which can be a centre of mass or a fixed point. Torque can also be defined as a rotating object's ability to overcome turning resistance, such as a gear or a shaft.

In most cases, it is expressed in pounds per foot or newtons per metre. Torque is frequently confused with work, which is defined as force applied across a distance. Torsion (twisting) is, however, an essential component of the definition of torque.

Torque and work are both mechanical expressions of energy. Torque is a force that allows cars to smoke brake burns and accelerate quickly from a slow speed.

The net torque on the pulley well about axle is the torque due to the 30 N force plus the torque due to 20 N force:

T=(30 N)r₁ sinθ₁+(20 N)r₂ sinθ₂

= (30 N)(0.02 m)sin(-90°)+(20 N) (0.02 m)sin(90°)

=(-0.60Nm)+(0.40 Nm)

=-0.20 N m

Thus, The net torque on the pulley about the axle would be -0.20 Nm.

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Answer:

Displacement is how far you are between your initial and finishing position.

Distance is how far you went.

Explanation:

For example, using a baseball field... if the sides are each 100 m..

A batter runs to third base... what is his displacement and distance?

Since the batter ran to 3rd base, it means he ran 300 m to get to 3rd base but his displacement is 100 m becuase that's how far they are from home plate. (which was their starting position)

So the answer to my example above would be:

Distance: 300 m

Displacement: 100 m

I hope this helped you.

Given statment "The length of the repeat unit of a microsatellite is longer than the length of the repeat unit of the minisatellite"is true. Because the length of the repeat unit of a microsatellite is shorter than that of a minisatellite.

True. Microsatellites and minisatellites are both types of tandem repeats, which are repeating sequences of DNA that occur one after another in a particular location on a chromosome. However, the main difference between the two lies in the length of their repeat units.

Microsatellites have shorter repeat units consisting of 1-6 nucleotides, whereas minisatellites have longer repeat units consisting of 10-60 nucleotides. This means that the length of the repeat unit of a microsatellite is shorter than that of a minisatellite.
Another difference between the two types of tandem repeats is their location on the chromosome. Microsatellites are generally located in the non-coding regions of DNA, whereas minisatellites are found in both coding and non-coding regions.

The difference in the length and location of these tandem repeats makes them useful for different types of genetic analysis. Microsatellites are commonly used for forensic analysis, paternity testing, and population genetics studies, while minisatellites are used for studying genetic variation and mutation rates.
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The ratio of the speed of the pulse of the wave from the first string to the second string is 1:1. The speed of a pulse in a string depends on the tension (T) and the linear mass density (μ). The formula for wave speed (v) is: v = √(T/μ)

Since both strings have the same tension (T) and linear mass density (μ), we can compare their speeds directly. Let v1 and v2 be the speeds of the pulses in the first and second strings, respectively.

Given that the first string is twice as long as the second, the ratio of their speeds (v1/v2) will be equal to 1 because the length of the strings does not affect the wave speed, as both strings have the same tension and linear mass density.

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Answer:

Compounds are two or more elements chemically combined in definite proportions by weight.

Mixtures are two or more substances not chemically combined.

Explanation:

Hope this helped Mark BRAINLIEST!!!

Answer:

A mixture can be separated by physical means

Explanation:

According to the given statement,

The sum of p and Q is 70N , the value of the forces p and Q is

25N

"Distance or quantity" is how magnitude is simply defined. It shows how an object moves when it is in motion, whether that movement is absolute, relative, or of a certain size. It serves as a way to describe something's size or scope. Magnitude is a general term used in physics to describe size or distance.

In order to compare the speeds of a car and a bicycle, the magnitude can be used as an explanation. Additionally, it can be used to describe the length a particular object has travelled or the magnitude of an object's amount.

According to the given value,

The magnitude of Q= the horizontal component of the resultant force.

θ= 90°-30°= 60°

|Q|= 50cos 60°= 25N.

Hence, the sum of p and Q is 70N , the value of the forces p and Q is 25N.

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To determine the kinetic energy of the bicycle tire, we can use the formula:

Kinetic energy (K.E.) = (1/2) * moment of inertia * angular velocity^2

Number of revolutions (N) = 10.0 rev

Moment of inertia (I) = 0.18 kg m^2

Angular acceleration (α) = 0.23 rad/s^2

Number of revolutions (N) = 10.0 rev

Moment of inertia (I) = 0.18 kg m^2

First, let's convert the number of revolutions to radians:

10.0 rev * (2π rad/1 rev) = 20π rad

Next, we can use the formula for angular acceleration to find the angular velocity (ω):

α = ω^2 - ω_0^2

Since the tire starts from rest, ω_0 = 0.

0.23 rad/s^2 = ω^2 - 0^2

ω = sqrt(0.23 rad/s^2) ≈ 0.479 rad/s

Now, we can calculate the kinetic energy using the formula:

K.E. = (1/2) * I * ω^2

K.E. = (1/2) * 0.18 kg m^2 * (0.479 rad/s)^2

K.E. ≈ 0.043 J

Therefore, the kinetic energy of the bicycle tire when it has made 10.0 revolutions is approximately 0.043 Joules.

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Answer:

90 mAmps

Explanation:

V=IR

V/R = I

9 v / 100 ohm = .09 amps = 90 mAmps

The mass of 3.0 L of air is 1.29 kg/m^3 * 3.0 L = 3.87 kga. The volume of the air increases by 3.35 L - 3.0 L = 0.35 L.

In order to warm the 3.0 L of air from 0 degrees C to 37 degrees C, your body must supply heat equal to the specific heat of air (1.005 kJ/kg*K) multiplied by the mass of the air (since density = mass/volume) and the change in temperature. Assuming the air is at standard conditions (1 atm and 0 degrees C), the density of air is 1.29 kg/m^3. Therefore, the mass of 3.0 L of air is 1.29 kg/m^3 * 3.0 L = 3.87 kg. The change in temperature is 37 degrees C - 0 degrees C = 37 K. So, the heat your body must supply is 1.005 kJ/kg*K * 3.87 kg * 37 K = 141.6 kJ.

b. The volume of the air can be calculated using the ideal gas law: PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is temperature. Assuming the air behaves ideally, we can use this equation to calculate the new volume of the air after it is warmed to 37 degrees C. The number of moles of air can be calculated using the ideal gas law again: n = PV/RT. At standard conditions, the number of moles of air in 3.0 L is 0.129 mol. At 37 degrees C, the new volume of the air is V = nRT/P = 0.129 mol * 8.314 J/mol*K * (37+273) K / 1 atm = 3.35 L. Therefore, the volume of the air increases by 3.35 L - 3.0 L = 0.35 L.

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