a heuristic device in which a solution to a problem is found by evaluating the difference between the current situation and the goal is the:

According to the given statement a river has an average  3 * 10⁵ W  is its discharge.

The scalar metric of speed and direction of motion is known as velocity. The speed that an object goes in one side is known as its velocity. Speed may be used to calculate both the vehicle speed traveling north just on main freeway and the velocity of a explosion bursting in space.

Water's speed is 2 m/s.

Flow area = 5m x 15m = 75m²

Water has a density of 1000 kg/m³

The volume of water flowing per second in the continuity equation is written as v=Av.

Hence, mass of water m=vρ=Avρ

K.E. = 1/2 mv² = 1/2 Avρ²

K.E.  = 1/2 Avρ³

ρ =  1/2 Avρ³

ρ  = 1/2 * 75 * (2)³ * 1000

ρ = 3 * 10⁵ W

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Due to the weight of the water on the body that is submerged, the pressure is higher at the bottom and lower at the surface.

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The Newton's first law is demonstrated over here.

If the wrench is thrown then that wrench will keep on moving in the space.

As we all no space has no gravity and since there is no gravity, hence, no force is applied on that body.

The wrench will move freely in the space and will continue to move in same direction until there is some external force is applied to stop or change its direction.

This shows that over here the Newton's first law is applied.

The Newton's first law states that the body will continue to be in the same state or motion and will not change until the external force is applied on it.

This Newton's first law is also known as law of inertia.

Therefore, the wrench will continue to move in the same direction under the influence of Newton's first law.

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The true velocity and direction of the boat is 67knots, 42degree.

Velocity is the directional pace of an item in motion as an indication of its rate of exchange in the role as determined from a selected frame of reference and as measured by way of a selected standard of time.

Average velocity is calculated by means of dividing your displacement (a vector pointing out of your initial role in your final position) through the entire time; the average pace is calculated by way of dividing the overall distance you traveled by means of the total time.

Calculation:- 

velocity of boat = 54 knots

direction =  48°

wind speed = 14 knots

direction =  20°.

The true velocity and direction of the boat is 67knots, 42degree

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Answer:

67 knots; 42°

Explanation:

I took  the test and got it right:)

This causes a force to be exerted on the electrons in coil 2, resulting in induced current flowing in the opposite direction.

What is force?
A force is indeed an influence that can alter an object's motion according to physics. A force may cause an object to mass to accelerate when it changes its velocity, such as when it moves away from rest. An intuitive way to describe force is as a push or even a pull. A force is a vector quantity because it has both direction and magnitude. It is calculated using the newton SI unit (N). Force is denoted by the letter F. (formerly P). The net force acting on an object seems to be equal to the speed that its momentum changes over time, according to Newton's second law in its original formulation.

The induced current in coil 2 will be in the opposite direction as the current in coil 1. This is because when the switch for coil 1 is closed, current will start flowing through coil 1. This will create a magnetic field around coil 1, which intersects with the magnetic field around coil 2. This causes a force to be exerted on the electrons in coil 2, resulting in induced current flowing in the opposite direction.

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The rate of change (magnitude and direction) of its angular momentum at this instant is  115 kg m/s².

The rate of change of angular momentum is equal to the net torque acting on the rock. The only force acting on the rock is the weight of the rock that is, mg.

As torque is equal to the product of the tangential component of force (

and distance (r) from the axis of rotation to the line of force, the net torque acting on the rock is,

Here, r is the distance from point O to the line of force.

This torque is equal to the rate of change of angular momentum of the rock.

Calculation:-

torque = mgcosθ

          τ = mgrcosθ

             = 115 kg m/s²

The magnitude of angular momentum is 115 kg m/s².

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The answers to these questions are:

Therefore, Two identical blocks are pushed up frictionless .

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The  materials arranged in order lowest to highest abundance are as follows

Metals> Rocks> Hydrogen compounds >Hydrogen and Helium

The solar nebula begins as a thin gas of hydrogen and helium that is covered in little dust specks. The planets' building blocks are these little grains. Any gas cloud's development depends significantly on the movement of dust particles. These grains serve as the condensation nuclei on which matter accretes.

The solar nebula is composed of 98% light gases, including hydrogen and helium, which were created during the Big Bang. Next, 1.4% of hydrogen compounds, such as water, methane, and ammonia, were found. Finally, 0.4% of rocks, such as silicates, and 0.2% of metals, such as iron, nickel, and aluminum, were found.Due to the intense heat, only metals and rocks could condense in the nebula's interior, while hydrogen compounds, despite being more prevalent, could only do so in the cooler outer regions.

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Answer:

A A A A. a. a a a a a a a

Explanation:

a is the answer

The intensity level of sound 2 is 63.386 W/m².

Intensity of sound 1 = 40.0 W/m²

Intensity of sound 2 = 2.0 dB

We know that I₁ = 10⁻¹² W/m²

Intensity level of sound 2 =

= Using the equation of the sound level intensity

= Iₓ = 10log (I/I₁)

= Iₓ = 10 log(40/ 10⁻¹²)

= Iₓ = 136.02 dB

Given that intensity of sound 2 is greater than sound 1 by 2.0 dB

Thus,

= Iₙ = 136.02 + 2.0

=  Iₙ = 138.02 dB

To calculate intensity of sound 2 =

= I₂ = 10log(Iₙ / 10⁻¹²)

= I₂ = 63.386 W/m²

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Force of friction is 0.167

The force preventing sliding against one another of solid surfaces, fluid layers, and material components is known as friction.

Things can move more slowly and become immobile when there is friction. In a world without friction, more things would slide around, it would be challenging to keep shoes and clothing on, and it would be extremely challenging for people or cars to move or turn.

According to the given information :

Mass=10 kg

Initial velocity(u)=20m/s

F=−μN

ma=−μmg

a=−μg

Distance travelled force coming to rest=30m

v²−u²=2as

0²−u²=2as

−u²=−2μgs

μ=(10)²/2×10×30=1/6=0.167

μ=0.167

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The potential difference between the plates of a parallel-plate air capacitor of capacitance 245 pf has a charge of magnitude 0.148 μC on each plate is 604 V

Q = C V

Q = Charge

C = Capacitance

V = Potential difference

Q = 0.148 μ C

Q = 0.148 * 10⁻⁶ C

C = 245 pF

C = 245 * 10⁻¹² F

V = Q / C

V = ( 0.148 * 10⁻⁶ ) / ( 245 * 10⁻¹² )

V = 604 V

Voltage, also known as electric pressure, electric tension, or potential difference, is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to move a test charge between the two points.

Therefore, the potential difference is 604 V

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Answer:

Explanation:

what are the multiple answers -.-?

Data provided in the question:

Initial depth of the submarine, d = 120 m

Density of water, ρ = 1.03 kg/m³

Now,

Pressure due to water = ρgh

here,

g is the acceleration due to gravity = 10 m/s²

h = height of water above

So,

Increase in pressure = ρgD - ρgd

= ρg(D - d)

= 1.03 × 10 × (120)

= 1236 Pa

Therefore, the total pressure of the submarine is 1236 Pa.

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Answer: The internal energy within a system associated with the motion of particles and that can be added to a substance is called kinetic energy.

Reason:

Internal energy U of a system or a body with well-defined boundaries is the total of the kinetic energy due to the motion of molecules and the potential energy associated with the vibrational motion and electric energy of atoms within molecules.

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Answer:

2.4 n

Explanation:

The force of kinetic friction between the block and the floor is given by:

where

is the coefficient of kinetic friction

N is the normal reaction of the floor against the block

For a horizontal surface (as in this case), the normal reaction is equal to the weight of the block, so . For wood-wood contact, the coefficient of kinetic friction is approximately . Therefore, the force of kinetic friction between the block and the

19600N[tex]m^{2}[/tex] is the total pressure near the bottom of the pool as per the given data in the statement.

Pressure:  The perpendicular force applied to surface of any object tending to be distributed per unit area is known as pressure.

According to the given data :

length of the pool = 22m

breadth of the pool =8.5 cm=0.085 m

depth =2 m

To find the pressure near the bottom of the pool we use the following formula

P=hpg, where h=height or depth, p= density of liquid and g= 9.8m/s

P=2*1000*9.8

P=19600N[tex]m^{2}[/tex]

Hence, 19600N[tex]m^{2}[/tex] is the total pressure near the bottom of the pool as per the given data in the statement.

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19600N[tex]m^{2}[/tex] is the total pressure near the bottom of the pool as per the given data in the statement.

Pressure:  The perpendicular force applied to surface of any object tending to be distributed per unit area is known as pressure.

According to the given data :

length of the pool = 22m

breadth of the pool =8.5 cm=0.085 m

depth =2 m

To find the pressure near the bottom of the pool we use the following formula

P=hpg, where h=height or depth, p= density of liquid and g= 9.8m/s

P=2*1000*9.8

P=19600N[tex]m^{2}[/tex]

Hence, 19600N[tex]m^{2}[/tex] is the total pressure near the bottom of the pool as per the given data in the statement.

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The magnitude of the total acceleration vector at the edge of the wheel at 1.2 s is 5.22 m/s².

Given that,

Radius of the wheel = 0.3 m

Initial angular velocity ω₀ = 0

It rotates 3.1 rev/s in 5.7s. Therefore, ω = 2*π*r = 2*π* 3.1 = 19.47 rad/s

We know that, ω = ω₀ + αt

where, α = angular acceleration

ω = Final angular velocity

t = time

α = 19.47/5.7 = 3.42 rad/s²

Total acceleration at any point will be a vector sum of tangential acceleration and centripetal acceleration

ω = ω₀ + αt

ω = 0 + 3.42* 1.2 = 4.11 rad/s

αc = ω² * r = 4.11² * 0.3 = 5.07 m/s²

Tangential acceleration αt = α * r

αt = 4.11 * 0.3 = 1.23 m/s²

α net = √(5.07² + 1.23²) = √(25.7049 + 1.5129) = 5.22 m/s²

Thus, the magnitude of total acceleration vector at the edge of the wheel is 5.22 m/s².

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The same change in potential energy will be produced by each of these actions because they all move a roller coaster car by the same amount of space.

What is potential energy, exactly?

Due to its position, an object has the ability to store energy. The bow has no energy stored when it assumes its normal position. The bow can yet store energy when its position is changed from its normal equilibrium position because of its position. Potential energy is the energy of position that a thing has stored inside it.

Because the train is moving against the magnetic pull, the potential energy is increased. However, because the magnets in the system are unchanged, the potential energy is unaffected. Engineer is testing two identical magnetic roller coaster vehicles on either side of a stationary center magnet.

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With a force of f, two charged particles repel one another. The force will be F/2 if only one particle's charge is doubled and the distance in them is likewise doubled.

A force of this magnitude can be described as a push or a pull, which is perfectly fine. A force does not "exist in" or "contain" an object. A force from another can exert pressure on something. The concept of a force makes no distinction across living creatures and inanimate objects.

The definition of force is an external cause that, when applied, modifies or tends to modifies the state of the body. The body comes to rest while it is in motion, and it will go into motion when it is at rest.

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The resistance of the resistor in this circuit is 82.31 Ohms

We would first have to solve for the angular frequency

ω = 2π* f

f = 180 hz

= 2* 3.14 * 180

= 1130.4

Next we would have to solve for the  Inductive reactance XL = ω* L

= 1130.4 * 0.027

= 30.52

The current is

3.2 v / 30.52

= 0.1048

Impedance Z = V/ I

9.2 v / 0.1048

= 87.79

To get the resistance we would have to use

Z² = (R² + XL²)

87.79² = R² + 30.52²

R²  = 87.79² - 30.52²

= 7707.08 - 931.47

= 6775.6

R = √6775.6

= 82.31 ohms

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On a current loop, a uniform magnetic field has a net torque but no net force. Let's assume that the magnetic field is parallel to both sides of the loop's two sides and is in its plane. The force on the left and right sides of the loop, if it has width a, height b, and current I, is given by F = IbB. Due to the field's parallel alignment with those other sides, they are not subject to any force.

No net force exists because the two forces are acting in opposite directions, but there is a torque that tends to cause the loop to rotate about an axis that passes through its center. This axis's torque is given by:

τ = F (a/2) + F (a/2) = Fa = IabB.

The area vector is perpendicular to the plane of the loop, so = IAB. Another right-hand rule can be used to determine its direction: curl your right hand's fingers in the direction of the current, and point your thumb outward so that it faces the direction of the area vector.

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The displacement would be approximately 2.83 meters.

What is displacement?
A displacement is indeed a vector in geometry as well as mechanics that has a length equal to the shortest distance between a point P's initial and final positions. It measures the length and angle of the net motion, or total motion, in a straight line from the starting point to the destination of the juncture trajectory. The translation that links the starting point and the ending point can be used to spot a displacement. The finishing position xf of the a point relative towards its initial position xi, or a physical location (resulting from of the motion), is another way to describe a displacement. The difference between both the final and initial positions can be used to define the corresponding displacement vector:

The spring's new displacement at equilibrium depends on the angle of the incline. Since the incline is 30 degrees, the displacement of the spring at equilibrium can be found by using the following equation:

Displacement = (mass * gravity * sin(incline angle)) / spring constant

In this case, the displacement would be (5.2 kg * 9.8 m/s2 * sin(30))/ spring constant. Plugging in the values we know, the displacement would be approximately 2.83 meters.

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Answer:

6.298 m/s

Explanation:

[tex]F_{net} =ma[/tex]

[tex]F_F=u_k*F_N[/tex]  friction force equation

[tex]ma=mgsin(x)-umgcos(x)[/tex]

We are given

[tex]m=10\\g=9.81\\F_F=16\\V_i=0[/tex]

[tex]umgcos(x)=F_F[/tex]

[tex]u*10*9.81*cos(x)=16[/tex]

[tex]u=0.18833036[/tex]

[tex]ma=mgsin(x)-umgcos(x)[/tex]

[tex]10*a=10*9.81*sin(30)-0.18833036*10*9.81*cos(30)[/tex]

[tex]a=3.305[/tex]

[tex]V_{f} ^{2} =V_{i} ^{2}+2ax[/tex]

[tex]V_{f} ^{2} =0 ^{2}+2*3.305*6[/tex]

[tex]V_f=6.298[/tex]

The speed of sedan is 39.68m/s.

By dividing a particle's mass by its speed, momentum is produced. Momentum is a vector quantity because it has both a direction and a magnitude. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. the laws of motion established by Newton.

Momentum = mass × velocity

Momentum of the truck = 3600 × 14

Momentum of the truck = momentum of sedan

3600 × 14 = 1270 × speed

Speed of sedan = 3600 × 14/1270

Speed of sedan = 39.68m/s.

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The square of the distance between the two charges has an inverse relationship with the force's size. As a result, when the gap between two charges is doubled, the attraction or repulsion weakens and drops to one-fourth of its initial strength.

An object's push or pull is seen as exerting a force. The interaction of the objects produces push and pull.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

A spring balance can be used to calculate the Force. Newton is the SI unit of force (N).

The interaction between two or more comparable or similar charges to produce force. Repulsion between similar charges occurs. Charges that resemble one another separate from one another. Chemical bonding involves repulsive forces.

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The calculated value is 5.6 m. Much more frequently than sound intensities in watts per square meter, sound intensity levels are expressed in decibels (dB).

Both the scientific literature and the public media use decibels as their preferred measurement unit. The rationale behind this decision of units has to do with how we hear. Noise exposure is harmful to the hearing, and it is normal for musicians to suffer from hearing loss that is so severe that it affects their ability to play. Sound intensity, a term that applies to all noises, whether or not they are heard, is the pertinent physical quantity.

We are given Δp, so we can calculate I using the equation I=(Δp)22ρv . Using I , we can calculate β straight from its definition in β (dB)=10 log10(II0) β (dB)=10 log10(II0) .

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The angular velocity of the wheel when the bike takes 6 s to complete one revolution is 0.33π

Time taken by the wheel = t = 6 s

Angle of the wheel = θ

= θ = 2π

Angular Velocity = ω =

= ω = angle / time taken

= ω = θ / t

= ω = 2π / 6

= ω = π/3

= ω = 0.33π

Angular velocity is how fast the rigid body rotates with respect to its centre of rotation and is independent to the choice of origin. It is the displacement of the object revolving with respect to the time taken by the object.

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The size of the tidal bulges increases as the Moon moves closer to the Earth in its orbit, when it is in the new moon or full moon phase, and decreases as it moves away from the Earth in its orbit, when it is in the first quarter or third quarter phase.

What is tidal bulges?
The fluid and moveable ocean water is drawn towards the moon by the gravitational influence between the moon as well as the Earth. The ocean closest to the moon experiences a "bulge" as a result, as the Earth rotates, the affected waters' locations shift. Imagine the moon as just a magnet drawing the water to it. The force of intertia, which tends to keep an object moving inside a straight line, opposes this motion of the water in the direction of the moon. Our oceans' motion is balanced by this, but since the gravitational pull seems to be stronger, the resulting force also creates our tides.

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Answer:

Q = Q0 e^-t/RC = Q0 e^-t/T

Charge left on capacitor after time t where T is the time constant of the capacitor - R * C

Q / Q0 = .9          charge decreases by 10%

.9 = e^-t/T

ln .9 = -t / T = .10

Or t = -T * ln .9

When elapsed time t = -ln .9 * time constant