What is the density of a substance with a mass of 20. 0 g and a volume of 4. 0 ml?.

The CO2 molecules move at a root-mean-square speed of 339 m/s.

CO2 molecules have an average kinetic energy of 4.2 x 1021 J.

Kinetic energy is a property of motion that an object or particle can employ to move. An object accelerates and acquires kinetic energy when work is done by applying a net force, which transfers energy.

When an object is moving, it has kinetic energy. If we want to accelerate any item, a force must be applied. Applying force requires effort on our part. Once the process is complete and energy has in fact been transferred to the item, it will be travelling at a new constant speed.

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1.2 second  time taken when  travels 60km with the speed of 50km/s

speed=distance/time

time=distance/speed

distance=60 km

speed=50 km/s

time=60 km/50 km/s

time=1.2 second

Speed (often abbreviated as "s") is a scalar variable that describes how much an object's location changes over time or how much it changes per unit of time. The average speed of an item in a period of time is the distance traveled by the object divided by the duration of the period.

Time divided by distance are the speed-related metrics.. The meter per second (m/s) is the SI unit of speed, while the kilometer per hour (kph) is the most often used unit of speed in daily life.

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Explanation:

Avrage acc= ◆velocity/ ◆Time

Av acc =25-10/6-0

Av acc = 15/6= 2.5 m/s^2

Answer:

See explanation.

Explanation:

To start with, an electric generator uses an A.C circuit power supply which means the current alternates throughout. Firstly, the magnetic field/direction produced by the magnets (N-pole and S-pole) cause the rectangular coil between to turn (you can figure out the direction of the force and current using Fleming's Right Hand Dynamo rule). Alongside, as the coil turns, it cuts through the produced magnetic field by the magnets to induce E.M.F (electromotive force) and then the voltage/current travels to the secondary coil where it is either stepped up or down as needed hence transforming the input voltage.

Answer:

150m = total displacement

Explanation:

50*3=150m

Table G is a representation of y, or the distance Pamela rode riding bike in x minutes. Pamela's average speed is the rate at which she moves consistently. Average speed is calculated as total distance minus total

The total distance traveled must be divided by the total amount of time it took to complete that distance in order to determine average speed. Speed refers to a thing's rate of movement at a particular moment. The term  Average speed describes the speed that a journey will typically go at.

Understanding average speed will help you better comprehend the pace of a travel. On a travel, the speed could occasionally change. Finding the average speed then becomes crucial to getting an idea of how quickly the route will be finished.

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There are various differences that differ the Great dark spot from the Great red spot, the major difference seen is Its ability to shift to North and south over time, while the Great Red spot is held steady by global east-west winds.

Also, the Great dark spot is Disappeared, where as the great red spot is still visible. There is a possibility for this that the great dark spot must have shifted to some other location, but this is not possible for this much long period so this could be the limit of observations from the Hubble telescope.

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Answer:24

Explanation:u just get good sum idek

Answer:

below

Explanation:

d  = 1/2 a t^2

  = 1/2 (9.81)(5.2)^2 = 132.6 m =~ 133 m

The astronomer on duty going to have a bit of a problem satisfying her request because after a white dwarf cools off it will become too cold and dark to emit seen light.

The enlargement and contraction of pulsating variables can be measured through the use of the Doppler impact. The lines in the spectrum shift in the direction of the blue because the floor of the celebrity moves closer to us and then shifts to the pink because the surface shrinks again.

Astronomers take a look at planets, stars, and different celestial bodies. They use ground-based devices, including optical telescopes, and area-based total gadgets, consisting of the Hubble Space Telescope. some astronomers look at distant galaxies and phenomena which include black holes and neutron stars.

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stone's position from the ground after:

a) .5 seconds is 56.275 m.

b) 1.0 seconds is  50.1 m.

c) 1.5 seconds is 45.475 m.

d) 2.0 seconds is 30.4 m.

Given parameters:

Height of the tower; h₀ = 60 m.

Initial velocity, u = 5 m/s.

We know that,

acceleration due to gravity, g = 9.8 m/s².

applied formula is :

h = h₀ - ( ut + 1/2gt²)

a)So, stone's position from the ground after:

.5 seconds:

h = h₀ - ( ut + 1/2gt²)

= 60m - ( 5*0.5 + 1/2*9.8*0.5²) m

= 56.275 m.

b)So, stone's position from the ground after:

1.0 seconds:

h = h₀ - ( ut + 1/2gt²)

= 60m - ( 5*1.0 + 1/2*9.8*1.0²) m

= 50.1 m.

c)So, stone's position from the ground after:

1.5 seconds:

h = h₀ - ( ut + 1/2gt²)

= 60m - ( 5*1.5 + 1/2*9.8*1.5²) m

= 45.475 m.

d)So, stone's position from the ground after:

2.0 seconds:

h = h₀ - ( ut + 1/2gt²)

= 60m - ( 5*2.0 + 1/2*9.8*2.0²) m

= 30.4 m.

Hence, different position of the stone in different time is calculated.

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The answers include the following:

This is referred to as the muscle of the heart and it is involved in pumping of blood to different parts of the body.

In the case of a heart attack, this type of muscle is affected which leads to reduction in the distribution of blood.

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Answer:

Explanation:The answers include the following:

The skill which involves the ability to change and control the direction or position of the body while keeping the motion quick and constant is agility and is denoted as option A.

The place where Li Qiu should start and where he should end is gland produces adrenaline; heart beats faster.

The type of  contraction which involves muscles lengthening as they strengthen is eccentric.

The action which helps you warm up before you begin exercising is walking around at a normal pace.

As the food travels down her esophagus, smooth muscles are working.

The word which describes the muscles that support your hollow organs is smooth.

Muscle physiology is a field of study which involves learning how muscles work

The best benefit of staying fit in terms of Lisa's memory is that staying fit creates new brain cells.

When you walk, pick something up, or sit down, the skeletal muscles are used.

Learning to dance has built up metabolic connections in Hiro's body.

The act of muscles tightening and shrinking is contraction.

The cardiac muscles is where the heart attack harmed.

A growth disorder is most likely as a result of endocrine disorder.

When you tighten your fist, it extends.

Faith's metabolism is working at a higher level which is why there are changes such as feeling better rested.

What is Cardiac muscle?

This is referred to as the muscle of the heart and it is involved in pumping of blood to different parts of the body.

In the case of a heart attack, this type of muscle is affected which leads to reduction in the distribution of blood.

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10^3 watt is the power of the heater,

power=work done/time

work done= mcΔt

m=1 kg

c=4.2 x 103 Jkg-¹ C-¹

Δt=75°C

work done= mcΔt

work done=1 x 4.2 x 10^3x 75

work done=3.15x10^5 joule

power=work done/time

power=3.15x10^5 joule/315 s

power= 10^3 watt

power is produced when a force causes a displacement. There is no connection between power and the amount of time this force takes to cause a displacement. The process's speed might range from being finished quickly to taking some time. For example, it takes an abnormally long time for a rock climber to elevate her body a few meters over the cliff's edge. A trail hiker, on the other hand, may swiftly lift her body a few meters if she selects the faster path up the mountain. Even though the two people put in the same amount of power , the hiker finishes the assignment far faster than the rock climber.

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X will lift faster and easier than Y because of X lift with maximum speed with minimum energy consumption.

First we have to find from that we get to know that which windlass will lift faster,

For windlass X,

Torque(X)=weight x radius of drum

                 =50x9.81x0.25=122.625 Nm

Torque (Y)=weight x radius of drum

                  =50x9.81x0.375=183.93 Nm

As we know that,

Equation of Power= Torque x Angular velocity

And Angular velocity (w)= 2 x pi x N/60

Therefore Torque is inversely proportional to speed. Thus, when speed of the car is increasing , decreaseing of torque will start.According to above sentence ,windlass X have maximum speed of lift and windlass Y have comparatively low speed.Also power is directly proportional to Torque, so maximum torque used maximum energy and vice versa.

Therefore X lift with maximum speed with minimum energy consumption.

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Robert pushes the box to the left at a constant speed. In doing so, Robert does zero work on the box.

While the speed of an item stays equal - it does not increase or lower - we say it's far shifting at a constant speed.

Regular movement is a sort of motion that takes place when both the gap traveled by means of the item is equal for every 2d or the rate of the item changes by way of the same amount every 2d. A car retains a pace of 20 meters according to second because it acts in a straight line for five seconds and is in consistent motion.

An object has a consistent speed while both the value and direction of the charge at which such an object is changing its role continue to be steady. In different words, for an object to have consistent speed, its movement has to no longer alternate guidelines through the years and the object should have steady speed as properly.

Calculation:-

we know that work done = force × displacement

and force = mass ×acceleration

here acceleration is always zero at a constant speed

So, force is also zero hence the work done is ultimately zero.

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He exert 2.65 × [tex]10^{4}[/tex] N/m2 pressure on the ground if he stands on one leg.

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The final kinetic energy will it have just before hitting the ground is 5.8755 KJ.

Mass of the ball, M = 40 kg

Height of the ledge, S = 15 m

Initial velocity, u = 0 m/s (at rest)

Using equation of motion we get,

V² = u² + 2aS

V² = 0 + 2 × 9.8 × 15

V² = 294

v = 17.14m/s

kinetic enrgy is calculated as :

E = 1/2 × mass × v²

for initial velocity (u =0) kinetic energy is

E = 1/2 × 40 × 0²

E = 0J

for final velocity (v) kinetic energy is :

E = 1/2 × 40 × (17.14)²

E = 5,875.5 J

E = 5.8755 KJ

The final kinetic energy will it have just before hitting the ground is 5.8755 KJ.

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Using the Newton Laws, the acceleration of the object is 2.67m/s²

Based on the problem, we can draw the diagram as below to help our understanding.

From the information provided we know that:

F = 50 N (horizontal pull)

W = 75 N

f = 30 N (friction force)

From the picture, we could focus first on the X-axis, where the horizontal force and the friction force work on the object. We would apply the second law of Newton for this axis since there is movement happening within this axis.

∑Fx = m.a

F - f = m.a

50 - 30 = m.a

m.a = 20N ... (i)

Next, we will focus on the Y-axis. In this axis neutral force and weight are working but not resulting to any movement within the axis. ence, we will be applying the first law of Newton:

∑F = 0

N - W = 0

N = W

N = 75N ... (ii)

Since we know that weight is the result of multiply between mass and gravity, we could find the mass of the object by assuming the gravity is 10m/s²

W = m.g

75 = m (10)

m = 7.5kg ... (iii)

We could subtitute the equation (iii) into equation (i) to find the acceleration of the object:

m.a = 20N

(7.5) a = 20N

a = 2.67m/s²

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Force exerted on 4kg block =  6.2 N

Force exerted on 2kg block = 4.51 N  

Forces are influences that can change the movement of an object. A force may change the velocity of an object of mass (m), i.e. accelerate it. Forces can also be referred by pushing or pulling. A force has both magnitude and direction and thus it is a vector quantity.

For the acceleration of all the boxes:

Fₙ = ma

a = Fₙ/m

a = 14/(2+3+4)

a = 1.55 m/s²

For 2 kg block:

Fₙ - F₁ = m₁ × a

14 - F₁ = 2 × 1.55

F₁ = 4.51 N

For 4 kg block:

F₂ = m₃ × a

F₂ = 4 × 1.55

F₂ = 6.2 N

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Complete question is as follows:

Blocks with masses of 2. 0 kg, 3. 0 kg, and 4. 0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 14 n force applied to the 2. 0 kg block.

How much force does the 3kg block exerted on 4 kg block?

How much force does the 3 kg block exerted on 2 kg block?

The process of formation of the inner planets, namely from a collection of solid objects, gas, and dust that are joined in a heavy mass. During the initial process of forming a gas disc, a number of dust, gas, and other surrounding material fly in the same mass line and surround the sun like a belt.

The process of forming the outer planets is from the cooling process of several clumps that also orbit, continue to spin, and pull the sky material around them in the form of gas, dust and solid objects with their own gravity then solidify and become planets.

The Solar System is a collection of celestial bodies consisting of a star called the Sun and all objects bound by its gravitational force. The Sun is the center of the solar system. The sun is a star that is closest to the earth. Like other stars, the Sun is a hot object composed of various high-pressure gases. The sun is gigantic when compared to even the largest planet.

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Ignoring the Friction, the Acceleration of the block would be 2 [tex]ms^{-2}[/tex].

The relation of force with mass and acceleration is given by :

Force = Mass  *  Acceleration

Here the Force is 10N and the mass of the block is 5 Kg so substituting the values in the formula we get

Acceleration =  [tex]\frac{Force}{Mass}[/tex]  =  [tex]\frac{10}{5}[/tex] = 2 [tex]ms^{-2}[/tex] .

What is force-

According to physics. A force can cause an object with mass to accelerate when it changes its velocity, for as when it moves away from rest. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F. (formerly P).

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The relative ability of a bonded atom to attract shared electron pairs is called its electronegativity. This ability increases as the size of the atom decreases because for a smaller atom the shared electrons will be closer to the nucleus.

The electronegativity of an atom is a measure of how strongly it attracts electrons to itself. The higher the electronegativity of an atom, the more it will pull electrons away from other atoms.The electronegativity of an atom increases as the size of the atom decreases. This is because the electrons are closer to the nucleus in a smaller atom, and the nucleus has a greater pull on the electrons.

The electronegativity of an atom also depends on the number of protons in the nucleus. The more protons an atom has, the greater the electronegativity. Electronegativity is an important property in determining the chemical properties of atoms and molecules. Atoms with high electronegativities will tend to form bonds with other atoms that have low electronegativities. This is because the high electronegativity atom will pull the electrons away from the other atom, making the bond between the two atoms stronger.

The electronegativity of an atom is determined by the ability of the atom to attract electrons to itself. The higher the electronegativity of an atom, the more it will pull electrons away from other atoms.The size of an atom plays a role in its electronegativity. Smaller atoms have a higher electronegativity than larger atoms because the electrons are closer to the nucleus. This means that the smaller atom can more easily pull electrons away from the larger atom.

The trend in electronegativity is that it increases as you go from left to right across the periodic table. This is because the atoms get smaller as you go from left to right. The smaller atoms have a higher electronegativity than the larger atoms.The trend in electronegativity is also that it increases as you go from bottom to top of the periodic table. This is because the atoms get closer to the nucleus as you go from bottom to top.

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Answer: Yes

Explanation: The block moves a distance d under the influence of the force, so work is done by the force. Note that since the object is not accelerating, there is another force present, most likely friction.

b.

Answer:

Yes, No, No

Explanation:

The heat engine thermal efficiency is 70%, at which the engine has 9.33 kW of Power output.

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As a result, when seen from the electron source, the spot on the screen will be deflected to the right.

The scanning electron microscope ( sem (TEM), the first type of electron microscope, produces images of the specimen by illuminating it with a high voltage electron beam. An electron gun is used to create the electron beam; typically, the electron source is a tungsten filament cathode.

Both high-energy collisions, such as those that occur when cosmic rays penetrate the atmosphere, and the beta decay or radioactive isotopes can produce electrons. The name "positron" refers to the electron's antiparticle, which is essentially the same as the electron with the exception that it has electrical charge that is in the opposite direction.

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The metal in the spoon is an excellent conductor is correct sentences.

Conductors are the elements or materials that allow electricity to pass through them. They conduct electricity because they allow for simple electron passage between atoms inside of them. Conductors also allow heat or light to be transferred between sources. People, the earth, metals, and living things are all examples of conductors. We occasionally get electric shocks as a result. Additionally an excellent conductor of electricity is the human body. Therefore, it provides an unimpeded conduit for the electricity to travel from wire to body.

Conductors are made easy for current to pass through by the presence of free electrons on their surface. The capacity of conductors to carry electricity is based on this.

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The calculated answer is 2α. You must (a) increase the angular acceleration in order to increase the moment of inertia of a body about an axis.

The rotational rate of the body, measured in radians per second, is used to define the angular velocity of a rotating body about a fixed axis as (rad/s). In linear kinematics, force is what drives an object's acceleration. Similar to this, an angular acceleration is brought on by torque. As a result, torque can be thought of as the rotational counterpart to force. The force that can cause an object to rotate along an axis is measured as torque. Similar to how force accelerates an object in linear kinematics, torque accelerates an object in an angular direction. A vector quantity is a torque.

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The calculated magnitude of force is 47.04 N. Second Law of Motion by Newton (Force) An object's acceleration is determined by its mass and the force being applied.

All objects on Earth experience weight, or a gravitational pull that is proportionate to their mass and is imposed by the planet's mass. The acceleration that gravity gives to objects falling freely serves as a gauge of its strength. The acceleration of gravity at Earth's surface is approximately 9.8 meters (32 feet) per second every second. The magnitudes of the object's weight and the normal force are equal when the object is resting on a horizontal surface and there are no other vertically acting forces; that is, Therefore, the normal force in this case is 26 N, which is much greater than the box's weight.

F=ma

F= 4.8 * 9.8

=47.04 N

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The maximum angle in degrees between the ladder and the frictionless  wall if the coefficient of static friction between the ladder and the ground is 0.3 is 59.1°

Forces in vertical direction,

Fy = m g

Forces in horizontal direction,

Fx = μ m g

Moment at bottom of the ladder,

Fx L sin θ - Fy L cos θ / 2 = 0

μ m g L sin θ - m g L cos θ / 2 = 0

tan θ = 1 / 2 μ

tan θ = 1 / ( 2 * 0.3 )

tan θ = 1 / 0.6

tan θ = 1.67

θ = 59.1°

Static friction is the frictional force of an object at rest. Once the object exceeds this force the object starts to move. The object will then have kinetic friction which resists its motion.

Therefore, the maximum angle between the ladder and the wall is 59.1°

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