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A material’s density is the same, no matter how large or small the sample is, or what its shape is, as long as it is a solid, uniform piece of the material. Explain how this is possible and give an example.

Answer:

Explanation:

Given:

m = 100 kg

U = 110 W

I = 15 A

H = 25 m

g = 10 m/s²

__________

Wp - ?

A - ?

t - ?

V - ?

Wk - ?

(a) Potential energy of the load when it is lifted

Wp = m·g·H = 100·10·25 = 25 000 J

(b) The amountofelectri calenergyusedinth at time

E = I·U = 15·110 = 1550 J·s

c) The time taken to raise the load:

t = Wp / E = 25 000 / 1550 = 16 s

(d) The  average speed at which the load is being raised

V = H / t = 25 /  16 ≈ 1.6 m/s

(e)  The  kinetic energy of the load when it is being raised.

Wk = m·V²/2 = 100·1.6² / 2 = 128 J

Answer:

Earthquakes are likely to occur along the San Andreas Fault.

Explanation:

Answer:

Energy = 780 Joules

Explanation:

Given the following data;

Power = 78 Watts

Time = 10 seconds

To find the energy transferred;

Energy refers to the amount or quantity of power which is being consumed by an individual, group of people or organization over a specific period of time.

Mathematically, energy is given by the formula;

Energy = power * time

Energy = 78 * 10

Energy = 780 Joules

Therefore, the amount of energy the turbine transferred is 780 Joules

Answer:

I think its A & C

Explanation:

The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.

Elements located in the vertical column of the periodic table are of the same group and have similar chemical properties, therefore the correct answer is option A and option C.

The total number of protons present in an atom is known as the atomic number of that atom.

While the atomic mass of an atom is the sum of the total number of protons and the number of neutrons present inside any atom.

The element belonging to the same group have approximately similar chemical behavior while on the other hand element belonging to the same period would have the same outermost shell.

The correct response is option A and option C because elements included in the vertical column of the periodic table belong to the same group and have comparable chemical characteristics.

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Answer:

gas

................

Explanation:

hope it helps u

An individual's capacity to notice and learn about a stimulus is diminished if they have previously been exposed to it in a neutral or irrelevant environment. This phenomenon is known as latent inhibition.

With the use of traditional training procedures, latent inhibition is frequently examined. In a typical experiment, an individual or an animal is repeatedly exposed to an unimportant stimulus with no noticeable results. In following trials, the neutral stimulus is coupled with a physiologically important stimulus (such as food or an electric shock).

The goal is to determine how the subject's capacity to build an association between the neutral stimulus and the important stimulus is affected by the subject's prior exposure to the neutral stimulus. According to the phenomena of latent inhibition, prior exposure to a stimulus without any discernible effects results in a reduction in attention or learning when the stimulus is subsequently encountered in a pertinent context.

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Answer:

The value of Force is

\(f = 0.031n\)

Explanation:

Greetings!!!

Mass(m)= 0.005kg

Acceleration (a)= 6.2m/s²

Force= ?

Firstly, recall the Newton's second law.

substitute known variables into the equation.

Solve for Force.

If you have any questions or unclear ideas tag on comments.

Hope it helps!!!

The force of the bullet is  0.031 N.

The force of the bullet is calculated by applying Newton's second law of motion as shown below.

Mathematically, Newton's second law of motion is given as;

F = ma

where;

The force of the bullet is calculated as follows;

F = 0.005 kg  x  6.2 m/s²

F = 0.031 N

Thus, the force of the bullet is a function of the mass and the acceleration of the bullet.

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The mass flow rate of water is 0.087 Kg/s.

Contact tube diameter means no pressure head drop.

P=C heating done at P=C.

MC(T₁ - T₂) = Q = W

M × 1.015 (360-315) = 4000

M = 4000 / 1.015 × \(10^{3}\) × 45

M = 0.087 Kg/s

Pressure is defined due to the fact the pressure of all the gasoline particle/wall collisions divided thru the vicinity of the wall: All gases exert strain ; it's far one of the important measurable portions of this phase of depend.

From the weather to air tour, strain performs a dramatic position in our lives. It plays especially vital roles at some point of chemical reactions. through manipulating stress, chemists can pressure chemical reactions to occur and the transitions among solids, beverages, and gases to boost up.

The primary unit of pressure is the pascal, described because the stress exerted with the useful resource of a pressure of one newton perpendicularly upon a place of one square meter.

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Answer:

4.9 is the answer

Explanation:

pressure is force divided by area

force = mass x acceleration due to gravity

= 60kg x 9.8 m/s

area = length x width x height

=6 x 5 x 4

= 120

pressure = 588/120

= 4.9 pascal

The correct answer for the value of (i) Maximum pressure is \(24.5 \dfrac{N}{cm^2}\)(ii)Minimum pressure is \(19.6 \dfrac{N}{cm^2}\).

Given:

Weight of the block:  \(60\) kg

Dimensions of the box:  \(6 *4* 5\)

Value of gravitational constant:  \(9.8\) m/s²

Now,

\(Pressure = \dfrac{Force}{Area}\)

\(Force = mass*accelaration\)

\(= 60 * 9.8\)

\(= 588 N\)

Minimum pressure is when area is maximum:

\(= \dfrac{588}{6*5}\\\\= 19.6 \dfrac{N}{cm^2}\)

Maximum pressure when area is minimum:

\(= \dfrac{588}{6*4} \\\\= 24.5 \dfrac{N}{cm^2}\)

Maximum and minimum pressure are   \(24.5 \dfrac{N}{cm^2}\)  and  \(19.6 \dfrac{N}{cm^2}\) respectively.

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(a) 9000 m, 28.5 μs, (b) 0 m, 28.5 μs, (c) an average muon cannot make it to the surface.


a) An observer on the ground will measure the muon's distance to the surface to be 9000 m. The time it takes the muon to reach the surface is determined by dividing its distance by its speed, which is 9000 m ÷ 0.998c = 28.5 μs. b) In the reference frame of the muon, it is stationary, and the surface is approaching it at a speed of 0.998c.

The muon would measure the initial distance to the surface to be 0 m. The time it takes the muon to reach the surface is determined by dividing the distance by the relative speed between the surface and the muon, which is 0 m ÷ 0.998c = 28.5 μs. c) The average lifetime of a muon when measured at rest in the lab is 2.2 x 10-6 s. The time it takes for the muon to reach the surface is less than its average lifetime, meaning that it will not make it to the surface.

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A scientific theory should make testable predictions and if those predictions are found to be incorrect the theory should be dismissed.

He argued that science advances best through the use of deductive reasoning, known as critical rationalism, as its primary emphasis. Popper coined the term critical rationalism to describe his philosophy. Popper rejected the empiricist view that basic statements are infallible.

Karl Popper was a scientific realist against his will. Despite his own limitations regarding the forms of acceptable scientific reasoning and the extent of empirical evidence, he advocated a very real conception of scientific goals and outcomes. A significant contribution stems from his rejection of induction in empirical science.

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H = Pu / P x 100% = 360/750 x 100% = 48%

P/s: Pu is the useful power outlet of the leaf blower

P is the total power input to the leaf blower

ok done. Thank to me :>

Answer:

\(a=0.067\ m/s^2\)

Explanation:

Given that,

Mass of the box, m = 31 kg

The two forces are shown in the attached figure. They are acting in opposite direction.

Net force, F = 9.7 - 7.6 = 2.1 N

The formula for net force is given by :

F = ma

a is resultant acceleration

\(a=\dfrac{F}{m}\\\\a=\dfrac{2.1}{31}\\\\a=0.067\ m/s^2\)

So, the resultant acceleration is \(0.067\ m/s^2\).

The new force is 25 times greater: 6.50 N.

When two charged bodies exert a force on each other, this can be described by Coulomb's Law:

F = k * (|q1 * q2|) / r²

where F is the force, k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them. Initially, the force is 0.260 N.

When the distance is reduced to one-fifth, the new force can be calculated using the same formula with the updated distance. Since the distance is reduced to 1/5, the new distance term in the denominator becomes (1/5 * r² = 1/25 * r²

Thus, the new force is 25 times greater: F_new = 25 * 0.260 N = 6.50 N.

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Barometric pressure of 1000 mb is considered average. A pressure above 1013 mb is high, indicating fair weather, while a pressure below 1000 mb is low, indicating stormy weather.

Barometric pressure refers to the pressure exerted by the atmosphere on a particular area. It is commonly measured in millibars (mb). Generally, a barometric pressure of 1000 mb is considered average or normal.

High barometric pressure, also known as a high-pressure system, is typically above 1013 mb. It is associated with clear skies, stable weather conditions, and cooler temperatures. High pressure often brings fair weather and calm winds.

On the other hand, low barometric pressure, also known as a low-pressure system, is typically below 1000 mb. It is associated with cloudy or stormy weather, as well as higher temperatures. Low pressure systems often bring precipitation, strong winds, and potentially severe weather conditions.

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Answer:

Yes

Explanation:

The most common energy that is lost in electronic devices is in the form of heat energy.

Answer:

In both cases, the sound and spelling are the same, and only the definition changes. Here are 30 more examples of homonyms. Note that some homonyms have more than two meanings (for example, "tender" can also mean sensitive, easily chewed, or even refer to chicken strips), but to keep things simple we've only included two in our homonyms list:

The equation for energy in the context of fluid dynamics, specifically in Computational Fluid Dynamics (CFD), is typically represented by the conservation of energy equation, also known as the energy equation or the first law of thermodynamics. The equation can be expressed as:

ρ * (du/dt + u * ∇u) = -∇p + ∇⋅(μ * (∇u + (∇u)^T)) + ρ * g + Q

where:

ρ is the density of the fluid

u is the velocity vector

t is time

∇u represents the gradient of velocity

p is the pressure

μ is the dynamic viscosity

g is the gravitational acceleration vector

Q represents any external heat source/sink

The physical meaning of energy in CFD is the total energy of the fluid system, which includes kinetic energy (associated with the motion of the fluid), potential energy (associated with the elevation of the fluid due to gravity), and internal energy (associated with the fluid's temperature and pressure). The energy equation describes how this total energy is conserved and transformed within the fluid system.

In CFD simulations, the energy equation plays a crucial role in modeling the energy transfer, heat transfer, and flow characteristics within the fluid. It helps in understanding how energy is distributed, dissipated, and exchanged within the fluid domain. By solving the energy equation numerically, CFD simulations can predict temperature profiles, flow patterns, heat transfer rates, and other important parameters that are essential for various engineering applications, such as designing efficient cooling systems, optimizing combustion processes, and analyzing thermal behavior in fluid flows.

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Answer:

1mph

Explanation:

Answer:

1.26 m/s²

Explanation:

Given:

Δx = 172 m

v₀ = 17.3 m/s

v = 27.1 m/s

Find: a

v² = v₀² + 2aΔx

(27.1 m/s)² = (17.3 m/s)² + 2a (172 m)

a = 1.26 m/s²

realtion between applied force.and pressure is more force exerts more pressure whereas less force exerts less pressure

confused in another one

Answer:

See below

Explanation:

1) Applied Force and Pressure

Pressure = Force / Area

This shows that Applied force and pressure are in direct relationship. This means that If the Applied force is more, the Pressure is also More and vice versa.

2) Surface Area of Contact and Pressure

Pressure = Force / Surface Area of Contact

This shows that Pressure and Surface area of contact are inversely related. This means that if pressure is increased on an object, the surface area of contact decreases and vice versa.

The minimum amount of ice needed to bring the temperature of the  water at the given temperature is 111.5 g.

The heat capacity of a substance is the quantity of heat needed to raise the entire mass of the substance by 1 kelvin.

The minimum amount of ice at 10 Celsius needed to bring the temperature at 500 g of water at 20 Celsius is calculated by applying the principle of conservation of energy.

Heat lost by the water = heat gained by the ice

m₁cΔθ₁ = m₂cΔθ₂ + m₂hf

where;

500(4.184)(20) = m₂(4.184)(10) + m₂(333.55)

41,840 = 41.84m₂ + 333.55m₂

41,840 = 375.39m₂

m₂ = 41,840 / 375.39

m₂ =  111.5 g

Thus, the minimum amount of ice needed to bring the temperature of the  water at the given temperature is 111.5 g.

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Answer:

n = 1.6

Explanation:

The formula for the calculation of the absolute index of refraction is given as follows:

\(n = \frac{c}{v}\)

where,

n = index of refraction

c = speed of light in vacuum = 3 x 10⁸ m/s

v = speed of light in the piece of plastic = 1.87 x 10⁸ m/s

Therefore,

\(n = \frac{3\ x\ 10^8\ m/s}{1.87\ x\ 10^8\ m/s}\)

n = 1.6

The circuit shown has the drawback that it can only operate with alternating current.

The correct answer is D

A type of electrical current known as alternating current (AC) alternates the flow of electrons periodically or in cycles between two directions. Alternating current (AC) is the kind of current that circulates through electrical outlets used in everyday homes and power lines.

Both alternating current (AC) and direct current (DC) are types of electric current (DC). The way that electrons move determines how AC and DC are different from one another. While the flow of electrons in AC is constantly changing, moving first ahead and then backward, as opposed to DC's steady movement in one direction

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The length of the 100-meter long spaceship passing by you at 0.87c would be seen as approximately 49.3 meters.

The length of an object moving at relativistic speeds can appear shorter to an observer. This is known as length contraction. The formula to calculate the contracted length is given by:

L' = L * √(1 - (v^2/c^2))

Where:
L' is the contracted length observed by the observer,
L is the rest length of the object,
v is the velocity of the object, and
c is the speed of light in a vacuum.

In this case, the rest length of the spaceship is 100 meters and its velocity is 0.87c. So, we can substitute these values into the formula:

L' = 100 * √(1 - (0.87c)^2/c^2)

To calculate the result, we need to know the value of c, which is approximately 299,792,458 meters per second. Plugging in this value, we get:

L' = 100 * √(1 - (0.87 * 299,792,458)^2/299,792,458^2)

Simplifying the equation further:

L' = 100 * √(1 - 0.87^2)

L' = 100 * √(1 - 0.7569)

L' = 100 * √0.2431

L' = 100 * 0.493

L' = 49.3 meters

Therefore, the length of the 100-meter long spaceship passing by you at 0.87c would be seen as approximately 49.3 meters.

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The wavelength of a sound wave has a speed of 339 m/s and frequency of 640 hz.is 0.79 m. The correct answer is C.

The formula for finding wavelength is:

wavelength = speed of sound / frequency

Given the speed of sound as 339 m/s and the frequency as 640 Hz, we can substitute these values in the formula to get:

wavelength = 339 / 640

wavelength = 0.528125 meters

However, we need to round off this answer to the nearest hundredth, which gives us:

wavelength = 0.79 meters

Therefore, the correct answer is C. 0.79 meters.

Sound waves are a type of mechanical wave that travel through a medium, such as air, water, or solids.

They are characterized by their frequency, wavelength, and amplitude. Frequency is the number of cycles of the wave that occur in one second, and it is measured in hertz (Hz). Wavelength is the distance between two consecutive points on the wave that are in phase, and it is measured in meters (m). Amplitude is the maximum displacement of the wave from its rest position, and it is measured in decibels (dB).

The speed of a sound wave depends on the properties of the medium through which it is traveling, such as its density and elasticity. In general, sound waves travel faster through solids and liquids than through gases, because the molecules in solids and liquids are closer together and can transmit the wave more efficiently.

Therefore, the correct answer is C. 0.79 meters.

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In a capacitive circuit, the voltage lags behind the current and the voltage would point downward.

A capacitive circuit is a circuit that has a capacitor in it. We know that sometimes the voltage and the current may not be in phase. This implies that they are out of step with each other.

In a capacitive circuit, the current is out of step with the voltage and they are out of step by a factor 1/4 of a cycle or by 90 degree or we can say that it is a factor of about π/2 radians.

Thus, the capacitive circuit is one that involves an out of phase relationship between the voltage and the current and the current is lagged by the voltage.

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Answer:

The answer is 'more' as more mass can exert more pressure