An emerging type of mobile phone is the cellular/satellite ____ phone that can be used with cellularservice when it is available and then switches to satellite service when cellular service is not available.a.dual-modec.duplexb.dual-cored.digital

When the deflection h is the same for both manometers, the velocity of air and water, V_A and V_W, can be concluded to be the same. Therefore, V_A = V_W

Explanation:-

The Bernoulli equation, which expresses the conservation of energy in the movement of an incompressible fluid in a steady state, can be used to explain the working of the Pitot tube.

According to this principle, the velocity of a fluid, when it is passed via a constricted region, raises and the pressure lowers. Similarly, the pressure raises when the velocity of a fluid decreases.

So, this principle can be utilized to determine the velocity of a fluid by measuring the difference in pressures between the points where the velocity is higher and lower.

This measurement is accomplished using a device called a Pitot tube. The velocity of air and water can be measured using Pitot tubes connected to air-water manometers, which are illustrated above.

The difference in pressures, ΔP, can be obtained by measuring the difference in heights of the manometer fluids. The velocity of the fluid can be calculated using this ΔP and other system parameters.

When the deflection h is the same for both manometers, the velocity of air and water, V_A and V_W, can be concluded to be the same. Therefore, V_A = V_W. Therefore, option V_A = V_W is the correct answer.

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Answer:

Option D (Electricity can flow through it under special conditions ) seems to be the correct choice.

Explanation:

Other options that are provided are not related to the given theory. So that the above would be the correct choice.

Statement "Lack free electrons that can move to other atoms " describe semi-conductor.

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Answer:

43.3 m/s.

Explanation:

Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:

Total energy = Potential energy + Kinetic energy

Kinetic energy = Total energy - Potential energy

Kinetic energy = 300 J - 40 J = 260 J

However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:

Potential energy = mgh

40 J = m(9.81 m/s^2)(300 m)

m = 0.137 kg

Now we can use the kinetic energy to find the velocity:

Kinetic energy = (1/2)mv^2

260 J = (1/2)(0.137 kg)v^2

v^2 = (2*260 J) / 0.137 kg

v = 43.3 m/s (rounded to one decimal place)

Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.

Answer:

Explanation:

While pure science deals with knowledge discovery Applied science deals with knowledge use

The geocentric model says that the earth is at the center of the cosmos or universe, and the planets, the sun and the moon, and the stars circles around it. The early heliocentric models consider the sun as the center, and the planets revolve around the sun.

Answer:

4 × 5 = 5 + 5 + 5 + 5 = 20

Explanation:

Pick one factor and add it.

The spectrum observed from the Sun (or any star) would exhibit an absorption spectrum. This is because the outer gaseous atmosphere of the star absorbs specific wavelengths of light, resulting in dark absorption lines in the spectrum.

In the cooler, lower-density outer atmosphere, where white light from the star travels, some atoms or molecules in the atmosphere absorb photons with particular energy. In the spectrum, these absorptions show up as black lines at specific wavelengths. The specific set of absorption lines that each element or molecule generates results in a distinctive pattern that can be used to identify the elements that are present in the star's atmosphere.

The absorption spectrum offers insightful data on the chemical make-up and physical characteristics of the star. Astronomers can ascertain the elements present, their abundances, and other characteristics like the temperature, pressure, and velocity of the star's atmosphere by examining the absorption lines.

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Answer:

In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.

Explanation:

Answer:

Electrons flow easily between metal nuclei :)

Explanation:

Explanation:

the intersection behavior

The ratio of time taken by them when connected in series and parallel to boil same mass of water respectively is 9:2.

What is an electric kettle heater?

Electric kettles are mainly used for boiling the water in a jiffy container. Unlike the traditional gas stove kettles, electric tea kettles are highly efficient containers and these come with several innovative features.

R₁ = 15 min

Heat R₁ is

H = (V²/ H)15 = 15K

V²/ H = K

Same R₂,

V²/ H = K

Resistance in series,

R₁ + R₂

H = (V²/ R₁ + R₂)t

t₁ = (R₁ + R₂/ V²)H

t₂ = (H × R₁R₂)/ (R₁ + R₂)V²

t₁/ t₂ = (R₁ + R₂)²/ R₁R₂ = (15K + 30K)²/ (15K×30K)

t₁/ t₂ = 9/2

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Einstein’s equation means that a small amount of mass can be converted into a large amount of energy.

The Einstein’s equation shows the relationship between the mass and energy of matter. According to his theory, mass and energy are interconvertible. The “c^2” in Einstein’s equation means that a small amount of mass can be converted into a large amount of energy.

In a nuclear reactor, energy is one of the products, the energy produced ina nuclear reactor is vented as small amount of mass can be converted into a large amount of energy.  Nuclear fusion involves the joining of to nuclei, this process occurs naturally  in the Sun and other stars.

We know that;

E = mc^2

E = 3 * 10^-3 * (3×108 m/s)^2 = 2.7×10^14 J

Again;

E = mc^2

m= E/c^2

m = 1012 J/(3×108 m/s)^2 = 1.1 * 10^-14 Kg

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Answer:

1. A small amount of mass can be converted into a large amount of energy.

2. heat

3. in the Sun and other stars

4. 2.7×1014 J

5. 1.1×10−5 kg

100% correct

ANSWER : is it a very small space at the center of the gold atom.

The time taken for the car to go from rest to 21 m/s is 3.2 seconds.

The acceleration of the car is determined by applying Newton's second law of motion as shown below.

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

F (net) = ma

where;

The net force acting on the car is calculated as follows;

F (net) = F - Ff

where;

F (net) = 38,900 N - 34,000 N

F (net) = 4,900 N

The acceleration of the car is calculated as follows;

a = F (net) / m

a = ( 4,900 N ) / ( 745 kg )

a = 6.58 m/s²

The time of motion of the car is calculated as follows;

v = u + at

v = 0 + at

v = at

t = v / a

t = ( 21 m/s ) / ( 6.58 m/s² )

t = 3.2 s

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Given

mj = 65 kg

mc = 78 kg

voj = 5.75 m/s

after collision

vfj = vfc = 0 m/s

Procedure

The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.

The velocity before the collision would be 4.8m/s

The amplitude, restoring force and speed of an object undergoing simple harmonic  motion may have maximum magnitudes at the same instant of time.

Simple harmonic motion is a regular repeating motion. The acceleration of a simple harmonic motion is always directed towards the center of the motion.

There are three  quantities related to the object that can have maximum values at the same time and these are;

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The source of nutrition that Andrew should consume prior to the match to get the boost of energy he desires is carbohydrate.

Nutrition refers to the organic process by which an organism assimilates food and uses it for growth and maintenance.

There are 6 major classes of nutrients and they are as follows:

Among these classes of nutrients, carbohydrates provide the fastest source of energy in the body and hence, can be recommended for an athlete like Andrew who is preparing for a weight lifting endeavor.

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The correct option is D. This is due to the fact that the rod in D has the same length as the vibrating rod (unlabeled), making it more likely for it to enter into resonance and generate a more pronounced oscillation.

In a complex mixture of chemical compounds that are reacting, a chemical oscillator is one in which the concentration of one or more components changes on a regular basis.

A trustworthy point level sensor for high and low level indication or plugged chute detection is a vibrating rod, also known as a vibrating level switch. Bulk densities of as little as 1.25 lb/ft3 can be used for their use in light, fluffy powders and flakes.

Therefore, option (d) is correct-This is because, the rod in D has same length as the vibrating rod (unlabeled) so its more likely to get in resonance with that that's why it oscillates more vigorously.

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The wavelength of radio waves broadcast by a radio station with a frequency of 1300khz would be 230.76 m

It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.

The wavelength is inversely proportional to the frequency of the wave as from the following relation.

C = νλ

As given in the question  the wavelength of radio waves broadcast by a radio station with a frequency of 1300khz,

By using the formula

C = νλ

3×10⁸ = 1300 ×10³×λ

λ = 3×10⁸/ 1300 ×10³

  = 230.76 m

Thus,the wavelength of the radio waves comes out to be 230.76 m.

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\(\star\sf \overrightarrow{A}=4N\)

\(\star\sf\overrightarrow{B}=6N\)

\(\boxed{\sf R=\sqrt{A^2+B^2+2ABcos\theta}}\)

\(\\ \sf\longmapsto R=\sqrt{4^2+6^2+2(4)(6)cos160}\)

\(\\ \sf\longmapsto R=\sqrt{16+36+48(-0.93)}\)

\(\\ \sf\longmapsto R=\sqrt{52-44.6}\)

\(\\ \sf\longmapsto R=\sqrt{7.4}\)

\(\\ \sf\longmapsto R=2.7N\)

Answer:

Your vehicle's tires work hard every time you go on the road. As they age, they become more and more worn down, especially if you use the same set of tires year round. As a result, your tires will need to be replaced. ... If you are driving on a dirt road, or one that is worn, chances are you will feel vibrations.

The boiling point of the compound is 710.4 K (437.3 °C).

To find the boiling point of the compound, we can use the Clausius-Clapeyron equation:

ln(P2/P1) = (-ΔHvap/R) * (1/T2 - 1/T1)

where P1 and P2 are the vapor pressures at temperatures T1 and T2 respectively, R is the gas constant (8.314 J·mol–1·K–1), and T1 is the boiling point of the liquid.

We can assume that the vapor pressure at the boiling point (P2) is equal to the atmospheric pressure (1 atm). Therefore:

ln(1 atm/P1) = (-ΔHvap/R) * (1/T2 - 1/T1)

We can rearrange this equation to solve for T1:

T1 = (ΔHvap/R) * (1/ΔSvap + ln(P1))

Substituting the given values:

T1 = (21.34 kJ·mol–1 / 8.314 J·mol–1·K–1) * (1/57.93 J·mol–1·K–1 + ln(P1))

Simplifying:

T1 = 710.4 K + 40.97 ln(P1)

Now we need to find the vapor pressure (P1) at the boiling point temperature. We can use the Antoine equation:

log(P1) = A - B/(T+C)

where A, B, and C are constants specific to the compound. For simplicity, let's assume A, B, and C are 10, 1000, and 0 respectively (these are not real values, just arbitrary values for demonstration).

log(P1) = 10 - 1000/T

At the boiling point, the vapor pressure (P1) is equal to the atmospheric pressure (1 atm). Therefore:

log(1 atm) = 10 - 1000/Tbp

Solving for Tbp (the boiling point temperature):

Tbp = 1000 / (10 - log(1 atm)) = 513.2 K

Now we can substitute this value into the equation for T1:

T1 = 710.4 K + 40.97 ln(1 atm) = 710.4 K

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Answer:

The velocity of Alice (25 m/s) will be greater than that of Tom (0), when  they reach the lake below.

Explanation:

Given;

initial horizontal velocity of Tom is zero since he dropped straight down from the edge.

initial horizontal velocity of Alice is 25 m/s.

Their respective horizontal velocity when they jumped is the same as when they reach the lake below.

If we compare their velocities when they reach the lake, one will be greater than the other, if we neglect air resistance.

Thus, the velocity of Alice (25 m/s) will be greater than that of Tom (0), when  they reach the lake below.

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 value of length of secant DE in the intersecting secants is determined as 21.3.

The length of segment DE is calculated by applying the following theorem of intersecting secants.

This theorem states that the product of two secants of a chord is equal to the product of the two secants of the second chord.

From the given diagram, we will have the following equation;

(whole secant) (external part) = (whole secant) (external part)

BF x (FC) = EF x ( FD)

The given parameters;

length CB = 13

length BF = 9

length EF = 7

Length FD = DE + EF = DE + 7

Length FC = CB + BF = 13 + 9 = 22

The value of length of DE is calculated as follows;

9 x 22 = 7(DE + 7 )

198 = 7DE + 49

7DE = 149

DE = 149/7

DE = 21.3

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The missing diagram is in the image attached.

Answer: The charge that flows through the wire in 60 s is 14.87 C.

Explanation: The charge that flows through the wire in 60 s can be calculated using the formula:

Charge = Current x Time

The current can be calculated using Ohm’s law:

Current = Voltage / Resistance

Substituting the given values:

Current = 3.00 V / 12.1 Ohms = 0.2479 A

Charge = 0.2479 A x 60 s = 14.87 C

Hope this helps, and have a great day! =)

The  correct  processes based on the type of energy transfer they involve can be linked as ;

Conduction, radiation, and convection are the three different ways that thermal energy is transferred. Only fluids experience the cyclical process of convection.

The total amount of energy in the universe has never changed and will never change because it cannot be created or destroyed.

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Answer:

an open circuit (A battery, bulb, wire,switch)

Explanation:

the battery supplies the power the wire carries the current from the battery to the bulb but the circuit is not completed if the switch is not connected (Switch )

Answer:

True

Explanation:

True, the peripheral nervous system is responsible for both sending and receiving signals to and from the brain.

Answer:

true

Explanation: