Select all that apply.

Salt dissolved in water is a solution, therefore _____.


A. salt and water are chemically combined
B. salt is not chemically bonded to water
C. salt and water retain their own chemical properties
D. the ratio of salt to water may vary
E. the quantity of salt and water is fixed

Tension force, Friction and gravity are acting on acrobat player while hanging in middle. and this is unbalanced force.

Tension is a contact force that is transmitted through a rope, thread, wire, or other similar material when pressures on the opposing ends tug on it. The rope that holds a tire swing to a tree branch is one such example. The rope is pulled upward by a branch tugging against the rope's tug tension, which is only a pulling force; the rope is dragged downward by gravity. Pushing on a slack rope will not cause it to be strained. As a result, the force of tension must always be represented in the direction that the string is pulling the object in a free-body diagram.

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Speed (m/s) required to launch the projectile is 5.94m/s.

Speed is defined as the product of distance and the amount of time it took to cover that distance.

Equations,

Vx = Vxo

x = Vx × t

Vy = Vyo + gt

Vyo = 0

Vy = gt

y = yo - Vyo - gt² / 2

yo - y = gt²/ 2

time to get to the ground,

0.85 = g t² / 2

t² = 0.85m × 2 / 9.81 m/s²

t² =0.1732 s²

t = 0.416s.

initial velocity,

Vxo = x / t = 1.8m/ 0.416s =4.32m/s

speed before it strikes the ground,

Vy = g*t = 9.81 m/s × 0.416 = 4.08m/s

V² = Vy² + Vx² = (4.32 m/s)² + (4.08 m/s)² = 35.3064m²/s²

V = [tex]\sqrt{35.3064}[/tex]= 5.94m/s.

Speed required to launch the projectile is 5.94m/s.

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When it hits a receding one, its rebound speed is reduced.

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The magnitude of impedance is 1.33 ohms .

Electric circuit: a way for current to travel. A battery or generator, a device that provides energy to the charged particles that make up the current, a device that uses current, such as a lamp, an electric motor, or a computer, and the connecting wires or transmission lines make up an electric circuit.

Current flowing from the positive terminal to the negative terminal of the battery is known as an electric circuit. Putting together a circuit A cell or battery, connecting wires, a lightbulb, and a switch make up an electric circuit.

Given .

resistance = 90 ohms

reactance =120 ohms

So magnitude of impedance is 120/90

= 1.33 ohms

therefore the magnitude of impedance is 1.33 ohms

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When two objects with different mass are sitting on the same height ,the object with higher mass has more kinetic energy.

Higher the mass of the object higher the gravitational energy.It is the sum of potential energy and kinetic energy, It is the energy of an object either in motion or the energy that is stored in objects by their position.

          Eg =mgh

     Where ,m=mass

                 g= gravitational field

                 h= height

When an object is lifted it has gravitational potential energy.when it is dropped it begins to lose it,then form kinetic energy.

                Eg (initial) =Ek (final)

So, the object with higher mass has high kinetic energy.

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Formula of Coefficient of friction= F/N

Force applied on the block =47N (Provided in the question)

Mass of the body=15kg (Provided in the question)

Normal force applicable on the body(N)=m x g

N= m x g

Where N represents the Normal Force, m the mass of the body and g represents the gravitational force.

N= 15 x 9.8

N=147N

When a force is applied on a body that is less than that of the Limiting force ( the maximum static friction that can be there) then the friction force produced as a reaction to that force is equal and opposite in nature, acting on the same body.

Since a 47N force is applied on the block a static friction force of the same value will pull the body in the opposite direction.

Thus force due to Friction=47 N

Coefficient of Friction= Friction/ Normal Force

Coefficient of friction =47/147

coefficient of friction=0.319

coefficient of friction≈0.32

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Frequency is inversely proportional to the wavelength of electromagnetic radiation.

When the wavelength of light is doubled, the frequency is reduced to its original value.

Short wavelength UV (ultraviolet) light will have more energy.

The distance between identical points (adjacent crests) in adjacent cycles of a waveform signal propagated in space or along a wire is defined as the wavelength.

The relationship between frequency of electromagnetic radiation and wavelength of radiation is:

ν==1/λ

Where,

ν= frequency

As a result, the frequency of electromagnetic radiation is inversely proportional to its wavelength.

The frequency is reduced to its original value when the wavelength of light is doubled.

The energy of a photon is proportional to the frequency of light.

Using Relationship,

E=hν=h c/λ

h = Planck's constant

c = speed of light

Both h and c are constants

As a result, energy will be reduced to its initial value.

The light with the shortest wavelength will have the greatest energy.

UV (ultraviolet) light with a shorter wavelength has more energy.

It is because of the previously stated relationship..

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The load of 1.8 N will give it an extension of 12cm.

Amount of force required to increase unit length of a spring is known as spring constant. Si unit of spring constant is Newton/meter.

Given parameters:

Loads on the spring; F₁ = 7.5 N.

Increase in length of the spring; x₁ = 50 cm = 0.5 m.

So, spring constant of it; k = F₁/x₁ = 7.5/0.5 N/m = 15 N/m.

Hence, to extent it of 12 cm; required load

= spring constant × increase in length

= 15 N/m × 12 cm.

= 15 N/m × 0.12 m.

= 1.8 N.

So, the required load is 1.8 N.

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The answer is 361 W/m2-C.

This approach is most commonly used when the building manager or engineer is trying to determine the heat transfer coefficient and outflow fluid temperature and already knows the heat exchanger size and inflow temperature. Subtract the end temperature from the start temperature to get the difference.

You can calculate the efficiency of anything by dividing the energy input and energy output by 100%. We usually use this equation to express energy as heat or electricity. For relatively low-pressure equipment, if the design pressure on the low side is more than two-thirds of the design pressure on the high side a full pipe rupture is not a realistic scenario.

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Now that we know F Is 100 N, or 100 kg*m/S, and an Equals 5 m/s2, let's go on. Consequently, m =1 20 kg. Thus, the object's mass is 20 kg.

An object's mass is a fundamental characteristic, a quantifiable representation of its inertia, and a fundamental indicator of the volume of substance inside the thing. Mass is such a basic quantity that it is challenging to define in terms of another, which is why definitions of it frequently seem circular.

Use the perfectly match, where m represents mass and v is volume, to determine an object's mass. Therefore, if the volume is 10 bcm and the density of the object equals 500 kilos per cubic meter, the equation would be 500=m/10.

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The net force = 0

The total work done = 0

Kinetic energy = Constant

An object with zero net force will either remain stationary if initially stationary or maintain a constant velocity. While the net force on an object is zero, its velocity and direction of motion remain unchanged (an object at rest remains at rest).

Net force = Force - Friction

Fₙ = F₀ - Fₓ

Fₙ = 500N - 500N

Fₙ = 0 N

Since F = ma

ma =  0 N

a = 0

If acceleration is zero then the car is moving with a constant velocity.

Work done = force x distance covered in the direction of the force

W = Fₙ × d

W = 0 × 5 m

W = 0

K.E. = 1/2 mv²

Since the velocity is constant, the kinetic energy is also constant. The net work will be zero because the system has no net power. Nevertheless, potential energy increases with constant kinetic energy.

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The insulation tester, often known as a Megger, is a device used to assess insulation resistance. For measuring insulating resistance, we utilise the following devices.

What is insulation resistance?
The insulation resistance of wires, cables, and electrical equipment is measured in ohms. It is critical to protect against electric shocks and to avoid equipment damage caused by inadvertent discharges. The insulating resistance is measured by testing and evaluating the status of the isolation (head and body.)

Direct indicating ohm metre with hand-operated DC generator

With direct indicating ohm metre and motor-driven DC generator

Direct indicating ohm metre with DC battery

Direct indicating ohm metre with a full-wave rectifier

Resistance bridge circuit with galvanometer and battery

The insulating resistance is measured using direct current voltage. We can create the DC voltage using a hand-driven dc generator or a motorised dc generator. Insulation functions as a capacitor. If the insulation quality is excellent, the capacitor will block the DC. Leakage current flowing through insulation shows inadequate insulation quality.

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Answer:

Procedure - Take 150g of ice in a beaker and suspend a laboratory thermometer so that the bulb is in contact with ice. Start heating and note the temperature when the ice starts melting. Finally, note the temperature when all the ice is completely melted.

Change in heat causes change in temperature because heat is the transfer of energy from a hotter object to a cooler object, leading to a change in the internal energy of the substance, which in turn affects its temperature.

When heat is added to a substance, its internal energy increases, and the particles in the substance gain kinetic energy, leading to an increase in temperature. The kinetic energy of the particles determines their motion, and as they move faster, the temperature of the substance rises.

Conversely, when heat is removed from a substance, its internal energy decreases, and the particles lose kinetic energy, resulting in a decrease in temperature. As the particles slow down, the temperature of the substance decreases.

The relationship between heat and temperature is described by the specific heat capacity of the substance, which quantifies the amount of heat required to raise the temperature of a given mass of the substance by one degree Celsius. In simple terms, heat is the energy transferred during a temperature change, and the two are intrinsically linked.

In summary, change in heat causes change in temperature because heat is the energy transferred that alters the internal energy of a substance, leading to changes in the kinetic energy and motion of its particles, resulting in temperature fluctuations.

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120 KM/H is the ball's speed when this is caught at same height, therefore the speed is the same but the direction is different.

Your muscles are powerless, frightful, and helpless without speed. Just for display and to assist friends who are moving large pieces of furniture. The good news is also that speed may be acquired through the appropriate fitness training.

The distance an object covers in a predetermined period of time is referred to as its speed. Things are either thought to be moving swiftly or slowly depending on their pace of motion. Speed equals Distance x Time. Time and distance in the SI are measured in seconds (s) and meters, respectively (m). The metre every second (m/s) is the unit of speed in the metric system.

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Taking into account the definition of density, the density of the liquid is 0.8 g/cm³.

Density is defined as the property of matter, whether solid, liquid, or gas, that allows the amount of mass in a given volume of a substance to be measured.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

It can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

density= 40 g÷ 50 cm³

Solving:

density= 0.8 g/cm³

In summary, the density in this case is 0.8 g/cm³.

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When a tennis racket hits a tennis ball, the time needed for the racket to change the ball's direction by imparting an impulse to it is extremely low.

When a tennis ball is served, it is a contact with the racket for a time that is typical 0.005 seconds which is less than a hundredth of a second. The force provided by the racket is extremely high. So, the interval of time for which the force applied need not be high to change its direction.

I = F Δt

F = m a

F = m Δv / Δt

F Δt = m Δv

I = m Δv

I = Impulse

F = Force

m = Mass

a = Acceleration

Δv = Change in velocity

Δt = Change in time

Therefore, when  a tennis racket hits a tennis ball, the time needed for the racket to change the ball's direction by imparting an impulse to it is extremely low.

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One form of StyrofoamTM product, commonly used in craft projects, is Styrofoam balls. The spherical polystyrene foam objects known as Styrofoam balls range in diameter from one inch (2.54 cm) to eight inches (20.3 cm). The uses for Styrofoam balls in crafts are incredibly diverse.

Calculating the ball's volume using

V = 4/3 * pi * r3

r = 10 cm = 0.10 m.

V = 0.00418 m^3

The mass of the water with a volume of 0.0446 m3 is equal to m =??

V = 0.00418 m3,

and d = 1000 kg/m3.

m=V*dm=0.00418*1000=4.18 kg

then determining the styrofoam ball's mass.

V = 0.00418 m3

d = 32 kg per m3, which equals m = 0.00418 * 32 m = 0.1337 kg.

Finding the necessary mass to place on the ball's surface.

The distinction is what you'll need to put on the ball.

4.18 - 0.1337 = 4.046 kg ans.

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The average force of kinetic friction between the block and the surface is 0.00601N

v=u +at

v=at

t=v/a                                    -----------1

d=at²/2                               ------------2

Putting the value of t in eq 2

d=v²/(2a)

a=v²/(2d)                             -----------3

Putting the value of a in equation F=ma

F=ma ⇒ m [v²/(2d)]

In the question , m= 5g = 0.005kg , ∨=325m/s

Meanwhile distance=speed x time

distance=[ 325 x 135 ]

distance , d = 43875 m

F= m [v²/(2d)]

=0.005 {(325)²/(2x43875)}

=528.125/87750

=0.00601851852 N

≅0.00601N is the approximate force of kinetic friction between the block and surface.

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In order to determine where a sound is coming from,These signals include  the ear the sound strikes first and  the volume of the sound when it reaches each ear .

In order to determine where a sound is coming from, humans rely on two key clues.

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If you had a sugar cube that was made of white dwarf matter, it would weigh about as much as an elephant.

White dwarfs are the smallest type of stars in the universe, and they have a density of around 100 million times greater than that of water. This means that if you took a sugar cube that was made entirely out of white dwarf matter and put it on your kitchen counter, it would weigh about as much as an elephant!

But don't worry—you're not going to find any white dwarfs at your local grocery store or restaurant. White dwarfs are formed when red giants collapse in on themselves after burning through their fuel. And if you did happen to find one, you'd need a really big countertop.

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These corrective lenses have a 20 cm focal length and are diverging.

P=1/(f(m)) and "hence P= 1/(0.2)=10/2" and "therefore P=5 D" indicate that the lens has a 5 dioptre power.

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Adding a third resistor in series with two resistors connected across a constant voltage source without internal resistance will cause the power supplied by the source to decrease.

The reason is that adding the extra resistor will increase the total resistance and decrease the current through all three resistors. The new total resistance is: Rtot = R1 + R2 + R3

And as we see from Ohm's Law, V/I = R, so we can also express this as: V2/I2 + V1/I1 + V3/I3 = V4/I4.

From here, we can see that when we add a third resistor in series with two others, we have more voltage across each individual part of our circuit, but less current flowing through each part of it. That means our total power supplied by the source decreases because there is less current flowing through all three resistors combined.

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The total distance travelled is 100 m.

We know that distance is a scalar quantity. Let us note that scalar quantities are the quantities that do not have a direction rather they do have  magnitude. This is where the vector is different from the scalar quantity in physics.

Looking at this description, we are told that the polar bear walks 40 meters North, then 20 meters East , then 40 meters south. We can see that the total distance can be obtained by the addition of all the distances travelled.

Total distance travelled is; 40 + 20 + 40 = 100 m

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The capacitance and electric potential of the two capacitors are identical.

The charge stored and energy stored are also identical, as are the two capacitors' dielectrics.

The reason for this is that both capacitors have the same area, which is equal to the product of their radii multiplied by the distance between them. The two capacitors also have the same charge per unit area. So when you divide one by the other, you get a ratio of 1:1. This means that regardless of which capacitor you choose, it will store an equal amount of energy.

Additionally, if you choose to measure your capacitance by dividing your electric potential by your charge per unit area, then again, both capacitors will have identical values for this metric as well.

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Since frequency, in physics, is the number of waves passing a fixed location in a unit of time, it would remain constant.

In science and engineering, frequency is a crucial characteristic for describing the temporal rate of change seen in oscillatory or periodic phenomena including mechanical motion, audio signals (sound), radio waves, or light.

Frequency of a wave is defined as the total number consecutive waves generated in a second. Frequency is the measurement of the number of vibrations per second. As an example, consider the following: If five full waves are created in a second, their frequency is 5 hertz (Hz), meaning 5 cycles per second.

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Equation (8.10) provides the following form for the angular acceleration "alpha," which is proportional to the radius "rr," and the tangential acceleration "aa."

A wheel's angular acceleration is alpha = 6.0t4 - 4.0t2, where alpha is measured in radians per second squared and t is measured in seconds. The wheel has an angular position of +1.0 rad and an angular velocity of +2.0 rad/s at time t = 0.

=rα \s1: The most popular units for angular acceleration are rad/s2 and rad/s. 2 . Similar to how a + or - sign designates the direction of linear acceleration in one dimension, a + or - sign designates the direction of angular acceleration along a fixed axis.

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Because using maximum current, it  resonant current, and the supply voltage is 100 V (Vs = RI = 1000 x 0.1). Equating the reactances of the inductive and capacitive components the resonant frequency, f° =159.155

Electron current is the name for the movement of electrons. Negative to positive electron flow occurs at the terminal. Conventional current, or just current, behaves as though positive charge carriers are what produce current flow. From the positive terminal towards the negative, conventional current flows.

Ohm's law, or V=IR, is the most fundamental electrical law. The V indicates the potential difference between two chargesdifference of two charges is indicated by the V, which stands for voltage. Alternatively, it measuressaid, it is a measurement of the effort necessary to transfer a unit charge between two places.

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A sweptwing airplane with weak static directional stability and increased dihedral causes an increase in Dutch roll tendency. Option B.

Increasing speed increases the air flowing over and under the wing. An increase in the relative wind influence on the underside of the wing creates a large amount of air that is deflected downward, creating more lift. This is because the outer wing travels a longer distance than the inner wing, but both complete their rotation in the same amount of time.

As a result, the outer wing flies faster than the inner wing creating more lift. Since the bottom surface of the airfoil has a larger radius of curvature than the top surface, lift begins to increase with the angle of attack. Therefore the pressure gradient is downward. This means that the lower surface has a higher pressure than the upper surface and the wing receives a lift.

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Answer:-4432.5 m

Explanation:trust