How deep under the surface of a lake would the pressure be double that at the surface? (1 atm = 1.01 x 105 pa)

A sample of an ideal gas is heated, and its kelvin temperature doubles. The average speed of the molecules in the sample will increases by a factor of  [tex]\sqrt{2}[/tex]

The root-mean square (RMS) velocity is the value of the square root of the sum of the squares of the stacking velocity values divided by the number of values. The RMS velocity is that of a wave through sub-surface layers of different interval velocities along a specific ray path.

Root mean square speed is a statistical measurement of speed.

The root mean square speed can be calculated as : V1 : [tex]\sqrt{3 R T / Mo}[/tex]

if  temperature becomes double

let T1 is initial temperature

So ,  T2 = 2 * T1

now ,

Root mean square speed will be (V2) =  [tex]\sqrt{(3 R (2T)) / Mo}[/tex]

                                                     = [tex]\sqrt{2}[/tex] * [tex]\sqrt{3 R T / Mo}[/tex]

                                                     = [tex]\sqrt{2}[/tex] V1

Thus when temperature becomes double, the root mean square speed increases by a factor of  [tex]\sqrt{2}[/tex]

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Answer:

no :)

Explanation:

ezzzzzzzzzzzzzzzzzzzz

Liquid water is not itself wet, but can make other solid materials wet. Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.

The two fundamental forces act within an atom’s nucleus include the strong nuclear force and the weak nuclear force.

The fundamental forces of atoms nucleus are the forces that act within the nucleus of an atom which include the following:

Therefore, the two fundamental forces act within an atom’s nucleus include the strong nuclear force and the weak nuclear force.

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The power conducted by the resistor, given that it carries a current of 0.8 A is 19.2 Watts

Mechanical Power can be defined as the rate at which energy is consumed. This is also true for Electrical power, since it gives an expressing of the rate in which Electrical energy is consumed. Electrical power is expressed mathematically as:

Power (P) = voltage (V) × current (I)

P = IV

With the above formula, we can determine the power as illustrated below:

from the question given above, the following data were obtained:

Power (P) = voltage (V) × current (I)

P = IV

P = 24 × 0.8

P = 19.2 watts

Thus, the power conducted by the resistor which carries the current of 0.8 A is 19.2 Watts

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32.88grams of (Ag) silver would plate onto the pure electrode if a current of 6. 8A flowed through the cell for 72 minutes.

Silver can be electroplated at the cathode of an electrolysis cell by the half-reaction:

Ag+(aq)+e→Ag(s).

By Using the equation

Q= I×t,    where Q = charge

                           I = current = 6.8 A

                           t= time in seconds= 72×60=4320s

So,

Q=6.8×4320

Q = 29,376C

We see that 1 mole of electrons produces 1 mole of Ag from the half reaction.

1mole of electrons= 96,500C

xmoles of electrons= 29,376C

Cross multiplying;

29,376= 96,500 × x

Now , dividing both sides of the by 96,500

29,376/96,500=x

0.3044 moles of electrons will produce

0.3044×108 = 32.88grams of Ag

Therefore, 32.88grams of (Ag) silver would plate onto the pure electrode if a current of 6. 8A flowed through the cell for 72 minutes.

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The velocity of the block when t == 2 s is 60.7 ft./sec.

Equations of Motion.

Here the friction is [tex]F_f = \mu_k N[/tex] = 0.2 N

[tex]+ \uparrow \sum F_y = ma_y; \quad N – 10 = \frac { 10 } { 32.2 }(0) \quad N = 10 lb \\ \begin{aligned} \underrightarrow{ + } \sum F_x = ma_x; \quad 8t^2 – 0.2(10 &) = \frac { 10 } { 32.2 }a \\ & a = 3.22(8t^2 – 2) ft/s^2 \end{aligned}[/tex]

Kinematics.

The velocity of the block as a function of t can be determined by

integrating dv = adt using the initial condition v = 4 ft./s at t = 0.

[tex]\int_{ 4 ft/s }^{ v } dv = \int_0^t 3.22(8t^2 – 2)dt \\ \begin{aligned} v – &4 = 3.22 (\frac 8 3 t^3 – 2t) \\ & v = \{8.5867t^3 – 6.44t + 4 \} ft/s \end{aligned}[/tex]

The displacement as a function of t can be determined by integrating

ds = vdt using

the initial condition s = 0 at t = 0

[tex]\int_0^s ds = \int_0^t (8.5867t^3 – 6.44t + 4)dt \\ s = \{2.1467t^4 – 3.22t^2 + 4t \} ft[/tex]

at t = 2 sec

s = 30 ft.

Thus, at s = 30 ft.,

[tex]\begin{aligned} v &= 8.5867(2.0089^3) – 6.44(2.0089) + 4 \\ &= 60.67 ft/s \\ &= 60.7 ft/s \end{aligned}[/tex]

Kinematics is a subfield of physics, developed in classical mechanics, that describes the motion of points, bodies (objects), and systems of bodies (groups of objects) without considering the forces that cause them to move.

Kinematics, as a field of study, is often referred to as the "geometry of motion" and is occasionally seen as a branch of mathematics. A kinematics problem begins by describing the geometry of the system and declaring the initial conditions of any known values of position, velocity and/or acceleration of points within the system.

Then, using arguments from geometry, the position, velocity and acceleration of any unknown parts of the system can be determined. The study of how forces act on bodies falls within kinetics, not kinematics. For further details, see analytical dynamics.

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Centimeter is the right answer.

When a student performs an experiment and must measure the lengths of four different objects: a textbook, a pencil, a cup, and a piece of bread, centimeter would be the most appropriate unit of measurement for her to use.

The other units are either too small or too big to use for the measurement of the given objects.

On considering kilometer we usually use the kilometer unit of measurement for the measurement of distance.

Considering meter, we can tell that 1 meter = 100 centimeters which is also more when measuring the above given objects.

Micrometer is very small to measure the above mentioned objects.

The micrometer is a commonly used unit of measurement for infrared radiation wavelengths, bacterial and biological cell sizes, and for classifying wool according to the diameter of the fibers.

So hence on comparing all the units we can conclude that centimeter is the appropriate unit of measurement to measure  a textbook, a pencil, a cup, and a piece of paper.

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The lower-mass star should have developed into a giant star.

Algol variables, also known as Algol-type binaries, are a subclass of eclipsing binary stars that resemble Persei, the class's prototype star (Beta Persei, Algol). An Algol binary is a system in which both stars are almost spherical, making it possible to precisely predict when the eclipses would begin and conclude. Usually, the primary is a main-sequence star that is located close to its Roche lobe. The secondary star might be either an evolved star occupying its Roche lobe, known as a semidetached binary, or it could be a main sequence star, known as a detached binary.

eclipsing variable stars-

One of the most well-known variable stars in the sky, Algol serves as the model for the Algol variables class of eclipsing variable stars. A B-class main sequence star, an orange subgiant, and a faint A-class star make up the triple star system known as Beta Persei Aa1, Aa2, and Ab.

The lower-mass star should have developed into a giant star first, followed by the higher-mass B main-sequence star.

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Answer: f = 4.67 Hz

Explanation:

We can approximate the wave as a traveling wave, therefore the speed of the wave is constant         

v = d / t

the total distance remember, in going to the wall and back is         

d = 2 11.2 = 22.4 me

we substitute         

v = 22.4 / 4.0          

v = 5.6 m / s

now we can use the relationship between the speed of the wave, its wavelength and u frequency          

v =λ f         

f = v /λ       

f = 5.6 / 1.2        

f = 4.67 Hz

A current of 0. 82A flows through a light bulb. The charge passed through the light bulb during 94 s is 77.08C

The amount of charge flown for a given period of time determines the current passed through a bulb or electrical body.

The relation between the charge, current and time is given as:

Q = I × t

where, Q is the charge flown through bulb

I is the current passed through bulb

t is the time for which charge passes through bulb

Given,

I = 0.82A

t = 94s

Q = ?

Substituting the values in the above formula:

Q = I × t

Q = 0.82 × 94

Q = 77.08C

Hence, The charge passed through the light bulb during 94 s is 77.08C

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On connecting a 9V  battery to a Capacitor consisting of two circular plates of radius 0.066 m separated by an air gap of 2. 0 mm. The charge on the positive plate is 544.7 ×10⁻¹² C.

Capacitance of the capacitor is determined by the area of the plate of Capacitor and distance between the plates of capacitor.

Let the area of the Capacitor be A , radius of circular plates be r and distance between the plates of capacitor be d.

Given, Voltage, V = 9V

           Radius, r = 0.066m

           Distance, d = 2mm = 0.002m

Area of the Capacitor, A = πr²

                                     A = π(0.066)²

                                     A = 0.013m²

Capacitance, C = ε₀A / d

                      C = 8.85×10⁻¹²×0.013/0.002

                       C = 60.5 ×10⁻¹² F

                        C = 60.5 pF

We know that Q = CV where Q is the charge on capacitor.

Q = 60.5 ×10⁻¹² × 9

Q= 544.7 ×10⁻¹² C

Since, both plates of a capacitor acquire equal and opposite charge.

Hence the charge on the positive plate of the capacitor is 544.7 ×10⁻¹² C.

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The confidence interval for the given sample will be 15±1.711.

The confidence interval for the given sample will be 15±1.711.

To find the answer, we have to know about the confidence interval.

                           [tex]C= X+t (\frac{d}{\sqrt{n} } )\\ or \\C= X-t (\frac{d}{\sqrt{n} } )[/tex]

t-value for the chosen confidence level, X is the sample mean, d is the standard deviation, and n is the sample size.

                        [tex]C=15+1.711(\frac{5}{\sqrt{25} } )=15+1.711\\or\\C=15-1.711[/tex]

Thus, the confidence interval for the given sample will be 15±1.711.

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Heat is transferred from the sun-warmed surface of the earth to the cooler overlying troposphere via conduction.

Conduction, convection, latent heating, and water phase transitions all help to carry heat from the Earth's surface, which has been warmed by the Sun, to the cooler troposphere above.

Latent heat flux is the worldwide transfer of latent heat energy via water and air currents. Here, we demonstrate how air circulation transports latent heat energy horizontally to cooler regions, where it condenses into rain or is deposited as snow, releasing the heat energy that was previously trapped there.

When air is heated from below by sunshine or by coming into contact with a warmer land or sea surface, convection occurs and the air below becomes less dense than the air above.

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At temperature 402.71° C must a hot reservoir operate in order to achieve a 30% Carnot efficiency when the cold reservoir operates at 200 °C.

The Carnot engine is a theoretical thermodynamic cycle proposed by Leonard Carnot. It estimates the maximum possible efficiency that a heat engine during the conversion process of heat into work and, conversely, working between two reservoirs can possess.

The Carnot efficiency depends only on the temperature of the hot source and the cold sink. Carnot efficiency describes the maximum thermal efficiency that a heat engine can achieve as permitted by the Second Law of Thermodynamics.

Given

Efficiency = 30 %

T2 = absolute temperature of the heat source = T2

T1 = absolute temperature of the heat sink = 200 °C

efficiency = T2 - T1 / T2

30 /100= T2 - 200 / T2

T2 = 675.71° K

T2 = 402.71° C

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The nebular hypothesis explains how our solar system probably formed from a giant cloud of gases and dispersed solid particles.

What hypothesis explains how our solar system probably formed?

What is the nebular theory ?

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If current is passed through two parallel conductors in the same direction and the conductors are placed near each other, they will​ attract each other.

Electric current can be defined as the flow of electrons.

Since electrons are easily removed from atom and are very mobile, the flow of electrons constitute an electric current.

Materials which allow electric current to flow through them are known as conductors. Examples of conductors are metals, and electrolytes.

On the other hand, materials which do not allow electric current to pass through them are known as insulators. Examples of insulators are wood and rubber.

The flow of current is known as electricity.

Parallel conductors with current flowing through them in the same direction are attracted to each other as a result of a magnetic field produced by the flow of current.

In conclusion, conductors allow electric current to pass through and the flow of current through a conductor produces a magnetic field.

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Answer:

n1 sin θ1 = n2 sin θ2      Snell's Law       (θ1 is the angle of incidence)

sin θ2 = n1 / n2 * sin θ1

sin θ2 = 2.4 / 1.33 * sin θ1

sin θ2 = 1.80 * .407 = .734

θ2 = 47.2 deg

Tuba - Alloy

Paper - Polymer

Pot - Ceramics

Alloy : An alloy is a substance which made up of two more than two types of metal.

Ceramics: Articles, figures made up of clay which are hardened by the action of heating.

Polymer: These are the substance composed repeating units of of same chemical units which held together by covalent bonds.

Instead of using natural materials, synthetic products are created using chemicals or synthetic materials. Boots constructed of synthetic materials, such as synthetic rubber, may typically be washed in a machine.

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The cost of energy for pressing​ is 54 Kobo.

Units of electricity are measured in kilowatt-hours (kWh).

900-watt electric iron

Appliance usage = 4 hours a week for 5 weeks

The unit cost of electricity = 3 Kobo per kWh

Convert the wattage of the electric iron from watts to kilowatts.

1000 watts (W) = 1 kilowatt (kW)

⇒ 900 watts = 1 ÷ 1000 = 0.9 kilowatts

This means that the power consumption of the electric iron is 0.9 kW per hour of use.

Total hours spent pressing clothes:

= 4 hours per week for 5 weeks

= 4 × 5

= 20 hours

Total power consumption:

= number of kW × number of hours

= 0.9 × 20

= 18 kWh

To find the total cost, multiply the total kWh by the cost per kWh:

⇒ Cost = 18 × 3 = 54 Kobo

Therefore, the cost of energy is 54 Kobo

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The complete question is:

A man uses a 900-watt electric iron to press his clothes for an average of 4 hours a week for five weeks if the cost of electric energy is 3 Kobo per unit calculate the cost of electric energy for pressing​.

To lessen the negative impacts of the force generated during a collision, safety belts and occupant protective relays are installed.

Importance of safety belts:

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Answer:

database

Explanation:

A database is a collection of related data, equivalent to an electronic file cabinet. The correct option is B.

A database is a structured collection of data that is stored and accessed electronically in computing. Small databases can be kept on a file system, whereas large databases are kept on computer clusters or in the cloud.

A database is a well-organized gathering of information or data that is customarily entered into the system in a computer system. A database management system is usually in charge of such a database (DBMS).

A database system retail locations critical business data: the data, when analyzed, becomes valuable information about a company and aids in decision-making.

Database structure is the components of a database. This is actually a new way between entities.

Thus, the correct option is B.

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A)gallery

B)database

C)spreadsheet

D)presentation

When a substance changes from one type of matter into another, such as two or more substances combining to form compounds, the substance undergoes a: chemical reaction

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products.

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.

Whereas , When matter undergoes physical change, it doesn't become a different substance. Therefore, physical changes are often easy to reverse.

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μk = 0.106 is the coefficient of kinetic friction between the box and the floor

When the box is moving across the flat surface with a constant velocity, the force applied to it must be equal to the kinetic frictional force applied to the object:

F = μk*W = μk*mg

Where,

F = Force applied on box = 52 N

m = mass of box = 50 kg

g = 9.8 m/s²

μk = coefficient of kinetic friction between box and floor

hence,

52 N  = μk(50 kg)(9.8 m/s²)

μk = (52 N)/(490 N)

μk = 0.106

Kinetic friction is the name for a force that exists between sliding parts. A force opposing a body's forward motion is applied to one that is moving on the surface. The kinetic friction coefficient between the two materials will determine the magnitude of the force.

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With more turns of wire within the coil, the greater the strength of the static magnetic field around it.

Electromagnetic induction uses the relationship between electricity and magnetism whereby an electric current flowing through a single wire will produce a magnetic field around it. If the wire is wound into a coil, the magnetic field is greatly intensified producing a static magnetic field around itself forming the shape of a bar magnet giving a distinct North and South pole.

Likewise, if we kept the bar magnet stationary and moved the coil back and forth within the magnetic field an electric current would be induced in the coil. Then by either moving the wire or changing the magnetic field we can induce a voltage and current within the coil and this process is known as Electromagnetic Induction and is the basic principle of operation of transformers, motors and generators.

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Answer:

C, it doesnt accelerate

Explanation:

F=ma

F = 100 east + 100 west

F = 100 east + (-100 east)

F = 0

0 = ma

in order to isolate acceleration, we would be dividing 0 by mass, which would equal 0

The greater impact force (in magnitude) acts on a) the car

Since , both the objects that is the car and a massive truck is coming and colliding with a certain speed , which means they are acquiring some momentum because of mass and speed , since they are coming with certain momentum when collided must have impacted each other.

Momentum is the measure of product of mass and velocity , if both of them are coming with same velocity then total dependency of impact will be on their masses  , since  truck is massive and car is small sports car , that means truck must have greater mass than the car , hence the greater impact force act on  a) the car

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The pressure of nitrogen which is needed to maintain a N2 concentration of 0. 53 m is 3.2 × 10^(4).

It is defined as the continuous physical force applied on or against an object by something which is in contact with it.

It is also defined as the force per unit area.

The henry law constant is thr ratio of the partial pressure of compound in air to the concentration of compound in water at given temperature.

C= kp

where,

C is the concentration of compound = 0.53m

k is the henry constant = 6. 2×10−4matm

p is the pressure of compound

By substituting all the value we get,

C = 6. 2×10−4 × p

0.53 = 6. 2×10−4 × p

p = 0.53/6. 2×10−4

p = 3.2 × 10^(4)

Thus we find that the pressure needed to maintain a N2 concentration of 0. 53 m is 3.2 × 10^(4).

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Work is said to be positive when Kinetic energy is greater than velocity (option B). Details about work can be found below.

Work is a measure of energy expended in moving an object; most commonly, force times distance. This means that no work is done if the object does not move.

However, work can either positive or negative depending on the direction of the object and the force applied.

When force and displacement are in the same direction, the work performed on an object is said to be positive work.

This further means that the kinetic energy, which is the energy due to motion, will be greater than the velocity of the object in order to overcome the object.

Therefore, work is said to be positive when kinetic energy is greater than velocity.

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Answer: (B) Kinetic energy is greater than velocity

Explanation:

What is entered in block 24j of the cms-1500 claim if the provider is a member of a group practice is national provider identifier (NPI).

A National Provider Identifier is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services.

The box 24j Shaded is used to identify the non-NPI if indicated by a qualifier in 24i.

The box 24j displays the NPI of the Rendering Provider.

Thus, what is entered in block 24j of the cms-1500 claim if the provider is a member of a group practice is national provider identifier (NPI).

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Answer:

The toy car will fall off Katie's hands and onto the ground .

Explanation:

This happens due to gravity.