30. When ice melts...Select one:a. water molecules become less free to move around.b. water molecules become more free to move around.c. the movement of water molecules is not affected.d. the temperature change is the greatest.

Answer:

add molecules

The moment of inertia if the axis of rotation is about the center of the axle is 4.06 Kg.m². The moment of inertia if the axis of rotation is about the end of the axle is 16.3 Kg.m².

Moment of inertia can be defined as the quantity represented by the object resisting angular acceleration which is the sum of the multiplication of the mass with its square of the distance from the axis of rotation.  

The moment of Inertia can be defined as the rotational inertia and has S.I. unit kg.m².

In General form, the moment of Inertia if the axis of rotation is about the center of the axle is expressed as I = (1/12)m.r²

Given the length of the axle, l = 2.0 m

The mass of the axle, m = 12.2 Kg

The moment of inertia about the center of the axle :

I = (1/12)m.r²

I = (1/12) × 12.2 ×(2)²

I = 4.06 Kg.m²

The moment of inertia  about the end of the axle:

I = (1/3)m.r²

I = (1/3) × 12.2 ×(2)²

I = 16.3 Kg.m²

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Answer:

Second, fundamental unit of time, now defined in terms of the radiation frequency at which atoms of the element cesium change from one state to another. The second was formerly defined as 1/86,400 of the mean solar day—i.e., the average period of rotation of the Earth on its axis relative to the Sun.

source britannica

Explanation:

A. Y max = 2A

B. Y max =  A

C. Y max =  0

D. Y max = A

So the order is, (A),(B) = (C),(D)

The maximum displacement or distance moved by means of a factor on a vibrating frame or wave measured from its equilibrium position. it's far identical to at least one-half the period of the vibration course.

For amplitude measurements, you rely the variety of vertical divisions occupied by means of the sign's vertical signal after which multiply with the aid of the vertical scale.

The better the amplitude, the better the power. To summarise, waves convey strength. The quantity of power they bring is associated with their frequency and their amplitude. The better the frequency, the greater electricity, and the better the amplitude, the more strength.

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A) \(y_{max}\) \(= 2A\)

B) \(y_{max}\) \(= A\)

C) \(y_{max}\) \(= 0\)

D) \(y_{max}\) \(= A\)

So the order is

{A), B) = D), C)}

A wave is a disturbance in a medium that transports energy without net movement of particles. This can take the form of elastic deformation, changes in pressure, electrical or magnetic strength, electrical potential, or temperature.

-It transmit energy.

-Usually it involves periodic repetitive movements.

-It does not result in net motion of the medium or particles in the medium              

(mechanical waves).

Waves can be periodic, in which these quantities repeatedly oscillate around their equilibrium (rest) values ​​at specific frequencies. If the entire waveform moves in one direction, it is called a traveling wave.

In contrast, a pair of superimposed periodic waves propagating in opposite directions form a standing wave. In a standing wave, the vibration amplitude has a zero point at some point where the wave amplitude appears smaller or even zero.

Waves are often described by the wave equation (the standing wave field of two opposing waves) or the unidirectional wave equation for propagation of a single wave in a defined direction.

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In circular motion, the total acceleration has two components: the centripetal acceleration (a_c) and the tangential acceleration (a_t). The centripetal acceleration is directed towards the center of the circle, while the tangential acceleration is directed along the tangent to the circle at the point of interest.

θ = tan^(-1)(a_c/a_t) or θ = tan^(-1)(a_t/a_c)

1. If you define the angle (θ) between the total acceleration vector (a) and the tangential acceleration (a_t), you should use:

2. If you define the angle (θ) between the total acceleration vector (a) and the centripetal acceleration (a_c), you should use:

Answer:

a) P1=100kpa

V1=6m³

V2=?

P2=50kpa

rearranging mathematically the expression for Boyle's law

V2=(P1V1)/P2=(100×6)/50=12m³

b) same apartment as in (a) but only the value of P2 changes

=> V2=(100×6)/40=15m³

Explanation:

since temperature is not changing we use Boyle's law. mathematically expressed as P1V1=P2V2

The volume of the balloon at 50 kPa and 40kPa respectively 12m³ and 15m³.

The physical force applied to an object is referred to as pressure: Per unit area, a perpendicular force is delivered to the surface of the objects. F/A is the fundamental formula for pressure (Force per unit area).

Pascals are a unit of pressure (Pa). Absolute, atmospheric, differential, and gauge pressures are different types of pressure.

Given parameters:

Initial volume of helium gas: V₁ =6m³  

Initial pressure of the helium gas: P₁ =100kPa

Since temperature is not changing we use Boyle's law expressed as: product of volume and pressure of a gas remains conserved.

a) Final Pressure: P₂=50kPa

Final volume:  V₂= ?

Rearranging mathematically the expression for Boyle's law

V₂ = (P₁V₁)/P₂ = (100×6)/50 = 12m³.

Hence, The volume of the balloon at 50 kPa is  12m³.

b) Final Pressure: P₂= 40kPa

Final volume:  V₂= ?

Rearranging mathematically the expression for Boyle's law

V₂ = (P₁V₁)/P₂ = (100×6)/40 = 15m³.

Hence, The volume of the balloon at 40 kPa is  15 m³.

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Answer:

What Is Moral Subjectivism? Moral subjectivism is based on an individual person's perspective of what is right or wrong. An individual can decide for themselves that they approve or disapprove of a certain behavior, and that is what determines if the behavior is right or wrong.

Plate boundaries represent the parts of the Earth's crust where plates come in contact with one another. There are three types of plate boundaries based on the movement and interaction of the plates involved. These are: Divergent Plate Boundaries, Convergent Plate Boundaries, and Transform Plate Boundaries.

Divergent Plate Boundaries
At divergent plate boundaries, two plates move away from each other as magma rises to the surface and creates new crustal material. Examples of divergent plate boundaries include the Mid-Atlantic Ridge, the East Pacific Rise, and the African Rift Valley.

Convergent Plate Boundaries
At convergent plate boundaries, two plates move toward each other and eventually collide. Depending on the type of plate involved, different types of interactions can occur. The three types of convergent plate boundaries are oceanic-continental, oceanic-oceanic, and continental-continental. An example of oceanic-continental convergence is the Pacific Northwest region of the United States. An example of oceanic-oceanic convergence is the Japanese Islands, and an example of continental-continental convergence is the Himalayas.

Transform Plate Boundaries
At transform plate boundaries, two plates move past each other in a horizontal direction. These boundaries are characterized by faults and earthquakes, such as the San Andreas Fault in California.

To create an illustration that represents each type of plate movement, you can draw a diagram that shows the direction of plate movement, the type of boundary, and any notable geological features associated with that type of boundary.

For example, a divergent plate boundary illustration could include a depiction of magma rising to the surface and creating new crustal material, while a transform plate boundary illustration could include a fault line and a depiction of the earthquakes that occur along that boundary.

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Answer:

I kind of do not get this but I think I know the answer it should be choice B

Explanation:

Answer:

it is B, a wave is not a thing of its own it is a disturbance, so unless it is an em wave it must go through something if that makes sense lol

Answer:

Explanation:

The process can be broken down into two steps:

Heat required to raise the temperature of ice from -20°C to 0°C.

Heat required to melt ice at 0°C and raise the temperature of water from 0°C to 10°C.

Step 1:

The heat required to raise the temperature of ice can be calculated using the specific heat capacity of ice, which is 2.09 J/g°C.

Heat required = mass × specific heat capacity × change in temperature

Heat required = 10 g × 2.09 J/g°C × (0°C - (-20°C))

Heat required = 418 J

Step 2:

The heat required to melt ice and raise the temperature of water can be calculated using the heat of fusion of ice and the specific heat capacity of water.

Heat required to melt ice = mass × heat of fusion of ice

Heat required to melt ice = 10 g × 334 J/g

Heat required to melt ice = 3340 J

Heat required to raise the temperature of water can be calculated using the specific heat capacity of water, which is 4.18 J/g°C.

Heat required = mass × specific heat capacity × change in temperature

Heat required = 10 g × 4.18 J/g°C × (10°C - 0°C)

Heat required = 418 J

Total heat required = Heat required in Step 1 + Heat required to melt ice + Heat required in Step 2

Total heat required = 418 J + 3340 J + 418 J

Total heat required = 4176 J

Therefore, 4176 J of heat is required to change 10 g of ice at -20°C into water at 10°C.

On Mars, with an acceleration due to gravity of 3.71 m/s^2, the same falling mass of 15.0 kg would impart 55.6 J of kinetic energy to the rotating drum if it falls through the same height of 3.00 m, assuming all other factors remain the same.

The kinetic energy (K) imparted to the drum by the falling mass can be calculated using the formula:

where m is the mass of the falling object, and v is its velocity.

Since the object starts from rest, its initial velocity is zero, and we can simplify the formula to:

where u is the initial velocity of the falling object.

The potential energy (U) of the falling object is given by:

where g is the acceleration due to gravity and h is the height through which the object falls.

Since the potential energy is converted to kinetic energy, we can set U equal to K:

Simplifying the formula, we get:

Substituting the values given in the problem, we get:

Taking the square root of both sides, we get:

Using this velocity, we can calculate the kinetic energy imparted to the drum on earth:

To calculate the kinetic energy imparted to the drum on Mars, we can use the same formula, but with the acceleration due to gravity on Mars (3.71 m/s²):

Taking the square root of both sides, we get:

Using this velocity, we can calculate the kinetic energy imparted to the drum on Mars:

Therefore, the same falling mass of 15.0 kg would impart 55.6 J of kinetic energy to the rotating drum on Mars, which is less than the 350.0 J on earth due to the lower acceleration due to gravity.

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When reading the simile "Bolt runs as fast as lightning," the most appropriate visual interpretation would be that "Bolt runs very fast."

This simile compares Bolt's speed to that of lightning, which is known for its incredible swiftness. The intention is to emphasize Bolt's exceptional speed by equating it to the rapid movement of lightning.

While the simile highlights Bolt's remarkable speed, it does not specify the manner in which he runs or the impact of each step. Therefore, the options suggesting Bolt runs in a straight line, in a wavy manner, or that each step produces thunder are not directly implied by the simile itself. These additional details go beyond the comparison of speed and introduce elements that are not explicitly mentioned.

Hence, the most accurate interpretation based solely on the simile is that Bolt runs very fast, comparable to the speed of lightning.

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Any of the following insulation colors, with the exception of green with white stripes, are acceptable when employing individual conductors in raceways for grounded conductor (neutral).

Materials that let the electricity move through them are called conductors. Insulators are substances that don't allow electricity to travel through them. Common conductors include materials like copper, aluminium, platinum, and silver. A few common insulators include glass, rubber, plastic, and wood.

Certain substances make it simple for electricity to travel through them. Electrical conductors are these substances. Many metals, including steel, iron, and copper, are effective electrical conductors.

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Answer:

May be egg shaped

Has no new stars being formed.

Has almost no gas or dust between stars.

Explanation:

Elliptical galaxy is the collection of many stars which are bounded together gravitationally, which is smooth and ellipsoidal and shape and the appearance is featureless.

Elliptical galaxy is ovoid or spherical masses of stars.

It is found in galaxy clusters and compact galaxies.

It has no gas or dust between stars which result in low rates of star formation.

It is formed When two spirals collide, they lose their familiar shape, morphing into the less-structured elliptical galaxies.

Elliptical galaxy is made of old stars and have no gas and dust.

An example is elliptical galaxy m60 which shines brightly and is egg shaped.

Answer:

A. The water

Explanation:

i got it right on A-P-E-X

Answer:

The Aluminum

Explanation:

With a larger specific heat, water requires more heat to raise its temperature by a temperature degree.

In this system, with equal masses of water and aluminum, the heat moving from the aluminum lowering its temperature by one degree is not sufficient to raise the water temperature by one degree.

Answer:

B. A student asking others to join the leadership club.

Explanation:

A parent isn't a peer, therefore can't be peer pressure. Drinking is negative for your body, therefore not positive peer pressure. A teacher isn't a peer, therefore the only answer left is B.

Time of flight = 1.6 s

Horizontal distance = 64 m

Projectile motion is the form of motion experienced by an object or particle projected into a gravitational field, such as from the surface of the Earth, and moves along a curvilinear path only under the action of gravity.

For the given case,

h = vt + ¹/₂gt²

h = height of tower

v = initial velocity

t = time of flight

55 = 50sin30t + ¹/₂9.8t²

55 = 25t + 4.9t²

4.9t² + 25t - 55 = 0

t = 1.6 s

X = vₓt

X = horizontal distance

vₓ = horizontal velocity

t = time of flight

X =  (50 x cos30) x 1.6

X =  64 m

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The power required to lift the water to the surface at a rate of 0.23 m³/s and at a height of 23m deep is 52.9 kW.

Power is obtained from the ratio of work and time and the power is measured in watts (W). P = W/t where W is the work done by the system and t is the time taken to do work.

From the given,

rate of electric pump = 0.23 m³/s

depth of the well = 23m

density of water = 1000 kg/m³

work done=?

work done (w)= m×g×h, where m is the mass of water, g is the acceleration due to gravity and is equal to 10 m/s², and h is the height.

Density = mass/volume

mass = density ×volume

        = 10³ × 0.23

Work done= 0.23×10³×10×23

                   = 52.9 ×10³ W

work done on the pump is 52.9 KJ

Power = work done / time (time = 1sec)

           = 52.9 × 10³ J/ 1 sec

          = 52.9 kW

Hence, the power to lift the water to the surface is 52.9 kW.

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Answer:

The first velocity is 0.19

The second velocity is 0.45

Explanation:

Answer: Three forces act significantly on a freely floating helium-

filled balloon: gravity, air resistance (or drag force), and a

buoyant force.

Explanation:

The air pressure on the bottom of the balloon is slightly higher than the air pressure on the top of the balloon (because of the altitude difference). This difference gives rise to the bouyant force. This force competes with gravity as the two main forces acting on the balloon. Every time your feet hit the ground when you are running, the ground hits your feet with an equal and opposite force. Newton’s third law explains how balloons and rocket engines work. When the neck of an inflated balloon is released, the stretched rubber material pushes against the air in the balloon. The air rushes out of the neck of the balloon.

Answer

NB:

- speed, U is measure in m/s

- acceleration, a is measured in m/s²

-time t in seconds , s

Therefore conversation must be made

Speed U = 20km/hrs

=20km÷1hr

But 20km= 20×1000=20000m

1hr= 1×60min×60sec=3600s

U=20000÷3600=5.56m/s

a=30km/hrs

=30km÷1hr

But 30km=30×1000=30000

1hr=3600s

a=30000÷3600=8.33m/s²

From the equation of motion

S=Ut + ½ at².

Where s= distance

S = 5.56m/s × 20s + ½(8.33m/s²)(20s)²

S = 1777.3m

Answer:

In explanation

Explanation:

DIFFUSION:

The movement of particles from a region where they are in higher concentration to a region where they are in lower concentration until the equilibrium is achieved is known as the process of "Diffusion". It occurs in all three states of matter, that is solid, liquid and gas.

OSMOSIS:

When the particles of a solvent move from a region of higher concentration to a region of lower concentration through a semi-permeable membrane until the concentration of the solution is balanced, is known as "Osmosis". It occurs in liquids only.

The statement that describes the transformation of the graph of function f onto the graph of function g is: The graph shifts 2 units right and 7 units down.

To determine the transformation of the graph of function f onto the graph of function g, we compare the two functions f(x) and g(x) and observe the changes in the equations.

The function f(x) = (1/x - 3) + 1 represents a reciprocal function that is shifted vertically 1 unit up and horizontally 3 units to the right. The reciprocal function is reflected about the line y = x.

The function g(x) = (1/(1 + 4)) + 3 simplifies to g(x) = 4 + 3 = 7, which is a constant function representing a horizontal line at y = 7.

By comparing the equations, we can see that the transformation from f(x) to g(x) involves the following changes:

The term 1/x in f(x) is replaced by the constant 1/(1 + 4) in g(x), resulting in a vertical shift of 7 units up.

The term -3 in f(x) is replaced by 3 in g(x), resulting in a vertical shift of 3 units up.

The +1 in f(x) is replaced by +3 in g(x), resulting in an additional vertical shift of 2 units up.

Therefore, the overall transformation is a shift of 2 units to the right and 7 units down.

Hence, the correct statement is: The graph shifts 2 units right and 7 units down.

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Answer:

The critical angle is 34 degree.

Explanation:

Given the index refraction = 1.77

We have to find the critical angle of sapphire when the air has the index of refraction of 1.0.

Use the below formula to find the angle.

sin(θ)c = 1 / n

sin(θ) c  = 1 / 1.77

(θ) c  = Sin^-1 (0.565)

= 34.4 degree

= 34 degrees.

Thus, the critical angle is 34 degree.

Torque rods only really suitable for use in low Earth orbit due to the magnetic field is stronger option -1 is correct.

By preventing the motor from rolling during the transfer of load, torque rods or torque roll restrictors reduce the effect of torque. The difficulties brought on by recovery functions are also addressed. They also stop vibration and noise from traveling from the motor block to the chassis, which limits motor roll.

Electromagnets used for attitude control on spacecraft are called torque rods. The spacecraft experiences a torque and changes in orientation when a current flows through the torque rod, creating a magnetic field that interacts with the geomagnetic field of the planet.

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The potential energy of the roller coaster is 176,400 J (joules).

The potential energy of an object is given by the formula PE = mgh, where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height or vertical position of the object.

In this case, the roller coaster is at a peak of 20m and has a mass of 900kg. The acceleration due to gravity, g, is approximately 9.8 \(m/s^2\).

Using the formula, we can calculate the potential energy:

PE = mgh

= (900 kg)(9.8 \(m/s^2\))(20 m)

= 176,400 J

Therefore, the potential energy of the roller coaster is 176,400 J (joules).

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The expression for the acceleration due to gravity can be given as,

Here, g is the acceleration due to gravity, G is the gravitational constant, M is the mass of planet and R is the distance from the center of planet.

Therefore, the acceleration due to gravity depends upon the distance from center of planet and the mass of planet.