what is the wavelength of a 4.5 ghz wifi signal?

Answer:

t = 1.33 seconds

Explanation:

Given that,

The mass of the ball, m = 5 kg

Initial speed, u = 8 m/s

Final speed, v = 12 m/s

Force, F = 15 N

We need to find the time for long the force is applied. Let the time be t. The force is given by :

\(F=\dfrac{m(v-u)}{t}\\\\t=\dfrac{m(v-u)}{F}\\\\t=\dfrac{5\times (12-8)}{15}\\\\=1.33\ s\)

So, the force is applied for 1.33 seconds.

Because the refractive indexes of the immersion oil and the glass microscope slide are the same; the oil prevents the refraction of the incoming light rays.

An invisible space is present between the slide and the lens that contains air.

When the light rays fall on the slide and lens they might get refracted due to air present between them.

If the rays get refracted then the diameter of the objective lens will expand further.

So in order to prevent the refraction of light, it is very important to lubricate the surface of the lens because glass and oil have same refractive index and without oil the light rays refract from their original path.

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Answer:

she just have to maintain her daily work routin to kepp up with work .she can use glovs than her hand will be protected .and for mantain friendship she have to franky with other and allways talk to you'r friends no matter how bg you are talking with friends can be verry helpfull

The ultimate causes of supernova explosions can be traced back to the behavior of subatomic particles through the understanding of the fundamental forces and processes that govern the behavior of matter at the microscopic level.

Supernova explosions occur when a massive star undergoes a catastrophic event, leading to a tremendous release of energy. At the subatomic level, the behavior of particles, particularly in the stellar core, influences the stability and fate of the star. For example, nuclear reactions involving subatomic particles, such as fusion and fission processes, produce the energy that sustains a star's luminosity and temperature.

Furthermore, the collapse of a massive star occurs due to gravitational forces overcoming the outward pressure generated by subatomic particle interactions. This collapse leads to the formation of a neutron star or a black hole, triggering the release of an immense amount of energy in the form of a supernova explosion. By understanding the behavior of subatomic particles, scientists can trace the chain of events that ultimately result in these powerful cosmic events.

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The magnetic field here is perpendicular to the coil's surface from outward to inward because the magnetic field's direction is from south pole to north pole inside the coil.

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field.

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Answer:

2 no answer: Deform the shape of the board

Answer:

Not testable.

Explanation:

The temperature of coffee can change, as the coffee gains or loses heat to the surroundings or the room temperature. For example, if you put a hot coffee in a cold room, the coffee will lose heat to the surroundings/room temperature, eventually making it colder.

The final equilibrium temperature (in °C) of the system when ice and water vapor are combined can be calculated using the principle of energy conservation and the specific heat capacities of ice and water.

To determine the final temperature, we can apply the equation:

(m₁ * c₁ * ΔT₁) + (m₂ * c₂ * ΔT₂) = 0

Where:

- m₁ is the mass of ice (22.0 kg)

- c₁ is the specific heat capacity of ice (2.09 J/g·°C)

- ΔT₁ is the change in temperature of ice (final temperature - 0.00 °C)

- m₂ is the mass of water vapor (4.80 kg)

- c₂ is the specific heat capacity of water (4.18 J/g·°C)

- ΔT₂ is the change in temperature of water (final temperature - 100.0 °C)

Solving for the final temperature, we find:

(22.0 kg * 2.09 J/g·°C * ΔT₁) + (4.80 kg * 4.18 J/g·°C * ΔT₂) = 0

Substituting the given values, we can solve for ΔT₁ and ΔT₂. Once we have those values, we can find the final temperature by adding ΔT₁ to 0.00 °C.

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Answer:

D). Insulator —> semiconductor —> conductor—> superconductor

Explanation:

The sequence list of types of materials in order from least conducive to the most conductive is: the insulator, semiconductor, conductor, and superconductor. Conductors are materials where electric current can flow freely; whereas, in insulators, electric current cannot. Examples of conductors are metals and water. Examples of insulators are plastics, papers, and rubbers.

Answer:

ya its D

Explanation:

\( \huge \sf \underline{ \color{green}Ⱥnswɇɍ : }\)

____________________________

The difference between the two concepts lies in the type of magnitude they represent, speed is a scalar magnitude, while velocity is a vectorial magnitude.

It is the variation of distance in a certain time as a consequence of the movement of a mobile element.

It is the vectorial magnitude that shows and expresses the variation in terms of position of an object and as a function of time.

Therefore, we can conclude that speed is a scalar magnitude that determines the ratio of the distance traveled by a body and velocity is a vectorial magnitude that expresses the relationship between the space traveled by an object, the time used for it and its direction.

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Answer:

5

Explanation:

we divide 3600000J by 720,000J

and after that the answer will be 5

3600,000J

---------------

720,000J

=5answer

The energy efficiency of the new solar panel improved through biomimicry would be 40%

The energy transferred from the Sun in the form of electromagnetic radiation is known as the solar energy

It can be used as the thermal energy for various life purposes as well as for the electricity conversion with the help of solar photovoltaic cells
The solar energy efficiency is the ratio of total electrical Energy converted to the total heat energy received from the solar photovoltaic panel energy-efficient see depend upon the area of the solar panel and the design of solar panel.

Solar panel efficiency = electrical energy /thermal energy received

As per the given problem standard solar panels transform 360 000 joules of input light energy into 720000 of useful electrical energy
The efficiency of solar panel = 720000/3600000

                                                =0.20

In percentage terms the solar panel efficiency would be 20%

As given in the problem that new solar panels that mimic butterfly wings are thought to have double the energy-efficiency

The efficiency of solar panel = 1440000/3600000

                                                =0.40

Hence,the efficiency of the new solar panels improve through biomimicry would be 40%

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Answer:

A light year is the distance light travels in a year. ... And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc.

Answer: A light year is the distance light travels in a year. ... And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU. A parsec is the distance at which one astronomical unit subtends an angle of one second of arc

Explanation:

Answer:

C. The forces are balanced.

Explanation:

Every answer other than C means the object moved.

By neglecting the buoyant force and using the given information, we estimate the damping constant (b) for this mass-spring system to be approximately 0.066 kg/s.

To estimate the damping constant (b) for a mass-spring system, we can use the following steps:

1. Calculate the angular frequency (ω) of the system using the spring constant (k) and mass (m):
ω = sqrt(k/m)

2. Determine the decay constant (α) using the initial amplitude (A0) and final amplitude (A) after time (t):
α = (1/t) * ln(A0/A)

3. Calculate the damping constant (b) using the angular frequency (ω) and decay constant (α):
b = 2 * m * α

Let's apply these steps to your problem:

1. Convert mass to kg: m = 75 g = 0.075 kg
ω = sqrt(115 N/m / 0.075 kg) ≈ 39.1 rad/s

2. Calculate decay constant (α):
α = (1/3.5 s) * ln(5.0 cm / 2.0 cm) ≈ 0.44 s^(-1)

3. Estimate the damping constant (b):
b = 2 * 0.075 kg * 0.44 s^(-1) ≈ 0.066 kg/s

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Answer:0.99 N

Explanation:

1200 N               F

||||||||||||      =   |||||||||||||||||||

3.2 m2             0.0075m2

F=0.99

Answer:

Explanation:

In this exercise we are going to apply the second equation of motion to model the situation

\(s=ut-\frac{1}{2}at^2\)

Given data

time in seconds= 4.6 seconds

speed v= 11 m/s

deacceleration a= 8.2m/s

Substituting this values into the expression for distance we have

\(s=11*4.6-\frac{1}{2}*8.2*4.6^2 \\\\s=50.6-\frac{1}{2}*8.2*21.16 \\\\s=50.6-\frac{1}{2}*173.512 \\\\\s=50.6-86.756 \\\\s=36.15m\)

α=30°

F=20 N

Fh=F*cos(α)

Fv=F*cos(90-α)=F*sin(α) (vertical component of the force F)

Fv=20*0,5=10.00 N

Answer (C)

Cognitive interview or the way of interviewing eye witnesses is the possible solution for the problems of bias which are associated with blind administration.

Blind administration includes the use of an officer, who is other than the officer, the individual who is constructing the photographic lineup and also the one who does not know the identity of the true suspect, to present the lineup to the eyewitness for the incidence.

Implementing the blind administration, where the officer who is constructing photographic lineup is unaware of who the actual suspect is, can prevent these unconscious actions and also can significantly reduce the likelihood of misidentification.

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(a) The change in internal energy of the gas is 452 J, and (b) the energy that must be added to the gas by heat along the indirect path is 1752 J.

(a) The change in internal energy of a gas is given by the first law of thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:

ΔU = Q - W

where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.

Along the diagonal path from I to F, no work is done by the system because the volume of the gas does not change. Therefore, W = 0.

The energy added to the gas by heat is Q = 452 J.

So, ΔU = Q - W = 452 J - 0 J = 452 J.

Therefore, the change in internal energy of the gas is 452 J.

(b) For the indirect path IAF, the change in internal energy of the gas is the same as in part (a), which is ΔU = 452 J.

Along the indirect path, the gas undergoes two processes:

From I to A, the volume of the gas is kept constant (isochoric process), so no work is done by the system. The heat added to the system is:

Q_1 = ΔU = 452 J

From A to F, the gas expands and does work on the surroundings. The work done by the gas is given by the area under the PV curve between points A and F. This area can be divided into a rectangular part and a triangular part:

The rectangular part represents the work done by the gas when it expands from A to C at constant pressure. The pressure is given by the value of P at point A, which is 4.5 × 10^5 Pa. The volume change is given by the difference in volume between A and C, which is 0.0025 m^3 - 0.0010 m^3 = 0.0015 m^3. Therefore, the work done by the gas during this process is:

W_1 = PΔV = (4.5 × 10^5 Pa)(0.0015 m^3) = 675 J

The triangular part represents the work done by the gas when it expands from C to F along the path CF. The pressure varies linearly with volume along this path, so the average pressure can be calculated as (P_C + P_F)/2. The volume change is given by the difference in volume between C and F, which is 0.0050 m^3 - 0.0025 m^3 = 0.0025 m^3. Therefore, the work done by the gas during this process is:

W_2 = (P_C + P_F)/2 × ΔV = (2.5 × 10^5 Pa)(0.0025 m^3) = 625 J

The total work done by the gas along the indirect path is:

W = W_1 + W_2 = 675 J + 625 J = 1300 J

Now, the energy that must be added to the gas by heat along the indirect path is:

Q = ΔU + W = 452 J + 1300 J = 1752 J

So, the energy that must be added to the gas by heat along the indirect path is 1752 J.

Therefore, The gas's internal energy changes by 452 J and heat must add 1752 J to the gas to make up the difference along the indirect path.

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The turtle's position and direction appropriately after each instruction to ensure accurate drawing. You can also customize the colors, sizes, and shapes to enhance the visual appearance of the AND gate.

To draw an AND gate using turtle graphics, you can use the following set of instructions:

Set up the turtle:

a. Set the turtle's initial position.

b. Set the turtle's pen color and size.

Draw the first input line:

a. Move the turtle forward to the starting point of the line.

b. Draw a straight line segment to represent the first input.

Draw the second input line:

a. Move the turtle to the starting point of the second line.

b. Draw a straight line segment to represent the second input.

Draw the output line:

a. Move the turtle to the starting point of the output line.

b. Draw a straight line segment to represent the output.

Draw the logic gate shape:

a. Move the turtle to the starting point of the gate.

b. Draw a rectangle to represent the gate.

c. Add any necessary labels or symbols to indicate it as an AND gate.

Add connections between lines and gate:

a. Move the turtle to the intersection point of the first input line and the gate.

b. Draw a small line segment to connect the input line to the gate.

c. Repeat the above step for the second input line and the gate.

d. Draw a small line segment to connect the output line to the gate.

Repeat the above steps as necessary to draw multiple AND gates or any additional components.

Remember to adjust the turtle's position and direction appropriately after each instruction to ensure accurate drawing. You can also customize the colors, sizes, and shapes to enhance the visual appearance of the AND gate.

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Answer:

The swimmer's momentum is 500 Kg m/s.

Hope you could get an idea from here.

Doubt clarification - use comment section.

Answer:

For a closed organ pipe, the point at the closed end is always a node, 'N' while the open end is always an antinode, 'A'

Therefore, for a closed organ pipe, we only have;

NA = N↔A = First harmonics = f₁

NANA = NA↔AN↔ NA = Third harmonics, = f₃ = 3·f₁

NANANA = NA↔AN ↔ NA ↔ AN ↔ NA = f₅ = 5·f₁

It can also be shown that for a closed organ pipe, only f₇, f₉, f₁₁, ... are present

Therefore, a closed organ pipe has only odd harmonics present

For an open organ pipe, we have;

ANA = First harmonics = f₁

ANANA = ANA ↔ ANA = Second harmonics = f₂ = 2·f₁

ANANANA = ANA ↔ ANA ↔ ANA = Third harmonics = f₃ = 3·f₁

Similar relationship exist for f₄, f₅, f₆...

Therefore, for an open organ pipe, all harmonics, (multiples of the fundamental, f₁) are present

Explanation:

According to past research, women have engaged in token resistance, which means they said no but then changed their minds and said yes. This occurs because of the cultural expectations that women are supposed to resist sexual advances even if they want to participate.

Because of this, women may feel pressure to refuse initially to maintain their reputation and avoid being seen as promiscuous. However, once the partner persists, they may give in to avoid being seen as too difficult or cold-hearted. Research has indicated that these behaviours are particularly evident in situations where the individual feels vulnerable or feels that they are in a low-power position. Women may also engage in token resistance to test their partner's sincerity and willingness to respect their boundaries. Additionally, it's worth noting that token resistance does not apply only to women, as men may also engage in this behaviour.

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The beams 2 and 4 reflect, while the beams 3 and 5 refractively bend. The coefficient of reflection of a substance rises steadily from top to bottom.

A beam seems to be a part of the structure that defies loads mainly applied horizontally to its axis (an element designed to carry primarily axial load would be a strut or column). Its primary method of displacement is bending. Reaction pressures are produced at the beam's bearing locations as a consequence of the loads placed on it.

In order to transmit the burden to a vertical load carrying part of the building, beams are used to carry the weight of the building's levels, ceilings, and rooftops.

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The ball travelled  234.33 meter in the x direction before it hits the ground.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

Horizontal speed of the ball is 30.0 m/s.

Acceleration due to gravity is = 9.8 m/s²

Time taken to fall 299 m is = √( 2 × 299/9.8) second = 7.81 second.

Hence, in this interval of time, the ball travelled in x-direction =

30.0  ×  7.81 meter

= 234.33 meter.

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Answer:

Overload

Explanation:

Answer:

I think that's because the force of gravity is greater than the buoyant force, and for the hot air balloons, they can increase/decrease the temperature of the air in the balloon in order for it to rise/fall for more control. For planes, they use aerodynamics as well as the help of a couple of engines to thrust the plane forward. I hope this helps.

The term that does not act upon winds that blow far above the surface of the earth is "friction."

Friction is a force that resists motion and is caused by the interaction of surfaces. However, winds that blow far above the surface of the earth are not affected by friction because there are no surfaces for them to interact with.

These winds are known as upper-level winds or jet streams, and they are primarily influenced by pressure gradients and the rotation of the earth.

Upper-level winds play a crucial role in weather patterns and aviation. They can impact the formation of storms, the movement of weather systems, and the efficiency of flight paths.

Understanding the behavior of upper-level winds is essential for meteorologists and pilots, as it helps them to predict weather conditions and plan safe and efficient flights. Overall, while friction is an important force that affects winds closer to the surface, it does not have a significant impact on winds at higher altitudes.

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