tv and radio stations transmit in specific frequency bands of the radio region of the electromagnetic spectrum. (a) tv channels 2 to 13 (vhf) broadcast signals between the frequencies of 59.5 and 215.8 mhz, whereas fm radio stations broadcast signals with wavelengths between 2.78 and 3.41 m. do these bands of signals overlap?

Answer:

Hi there!

There are many possible answers!

My best guesses are:

1) Knowing how they work will prevent injury! For example, knowing that the gears twist will stop you from putting your finger in it!

2) Allowing you to use it! Knowing how to line up the edge of the can with the tool will let you use it properly!

Hope this helps

Yes, this statement is true, the reverse breakdown voltage of a pn junction decrease as the doping levels increase.

We know,

The more is the concentration of doping in the pn junction, the less is the width of the depletion region.

We have to apply a electric voltage to make the break down. Because electric voltage creates an electric field in the depletion region.

Because of the smaller electric field, a small voltage can easily break the potential barrier of the biasing.

A very large number of electron-hole pairs jumps across the depletion region and the breakdown occurs.

Because the depletion region was thin. A small voltage did the job.

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Answer:

a. The ratio of their resistance is 2783:64

b. The ratio of their energy is 4:23

c. The charge on the first bulb is 5.75 C

The charge on the second bulb is \(0.\overline {36}\) C

Explanation:

The voltage on one of the electric bulbs, V₁ = 40  volts

The power rating of the bulb, P₁ = 230 w

The voltage on the other electric bulbs, V₂ = 110 volts

The power rating of the bulb, P₂ = 40 w

a. The power is given by the formula, P = I·V = V²/R

Therefore, R = V²/P

For the first bulb, the resistance, R₁ = 40²/230 ≈ 6.96

The resistance of the second bulb, R₂ = 110²/40

The ratio of their resistance, R₂/R₁ = (110²/40)/(40²/230) = 2783/64

∴ The ratio of their resistance, R₂:R₁ = 2783:64

b. The energy of a bulb, E = t × P

Where;

t = The time in which the bulb is powered on

∴ The energy of the first bulb, E₁ = 230 w × t

The energy of the second bulb, E₂ = 40 w × t

The ratio of their energy, E₂/E₁ = (40 w × t)/(230 w × t) = 4/23

∴ The ratio of their energy, E₂:E₁ = 4:23

c. The charge on a bulb, 'Q', is given by the formula, Q = I × t

Where;

I = The current flowing through the bulb

From P = I·V, we get;

I = P/V

For the first bulb, the current, I = 230 w/40 V = 5.75 amperes

The charge on the first bulb per second (t = 1) is therefore;

Q₁ = 5.75 A × 1 s = 5.75 C

The charge on the first bulb, Q₁ = 5.75 C

Similarly, the charge on the second bulb, Q₂ = (40 W/110 V) × 1 s = \(0.\overline {36}\) C

The charge on the second bulb, Q₂ = \(0.\overline {36}\) C.

d. The question has left out parts

Answer:

The answer would be Front Line

The base line, service line, and the side lines are the part of the tennis court however front line is not a part of the tennis court. Thus, the correct option is D.

A tennis court is a 78ft long court, with a service line of 21ft from the net. The courts for singles tennis matches are 27ft wide in dimension, while the doubles matches courts are 36ft wide. The total playing area in tennis for a singles court is 2,106ft² and 2,808ft² for a doubles court.

The basic and important parts of a tennis court in both singles and doubles are the baseline, the center mark, the sidelines, the service lines, and the service boxes. The baseline is the boundary line at the ends of the tennis court, and the sidelines are the lines which mark the boundary line between in-bounds and out-of-bounds for both singles and doubles play.

Therefore, the correct option is D.

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An automobile driver applies the brakes and decelerates from 26.4 m/s to zero in 11.0 s. The distance the car travels is 145.2 meters.

The distance traveled by the car can be determined using the formula:
distance = (initial velocity + final velocity) / 2 * time

In this case, the initial velocity is 26.4 m/s, the final velocity is 0 m/s, and the time taken is 11.0 s. Plugging these values into the formula, we get:
distance = (26.4 m/s + 0 m/s) / 2 * 11.0 s

Simplifying the equation, we have:
distance = 26.4 m/s / 2 * 11.0 s

Calculating further:
distance = 13.2 m/s * 11.0 s
distance = 145.2 meters
Therefore, the car travels a distance of 145.2 meters.

To better understand the calculations, let's break down the formula. The formula for distance involves the average velocity, which is calculated by adding the initial and final velocities and dividing by 2. Multiplying this average velocity by the time gives us the distance traveled.

In this scenario, the car starts with an initial velocity of 26.4 m/s and comes to a stop, so the final velocity is 0 m/s. The time it takes for the car to decelerate is given as 11.0 seconds.

By substituting these values into the formula, we can calculate the distance traveled, which turns out to be 145.2 meters. This means that the car comes to a complete stop after covering a distance of 145.2 meters while decelerating.

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Explanation:

x = 16.7 m

v₀ = 2.75 m/s

t = 8.90 s

Find: v

x = ½ (v + v₀) t

16.7 m = ½ (v + 2.75 m/s) (8.90 s)

v = 1.00 m/s

On the moon you weigh 6 times lighter so for this problem you multiply 140n by 6.

Your weight on the Moon is 16.5% what you would experience on Earth. In other words, if you weighed 100 kg on Earth, you would weigh a mere 16.5 kg on the Moon. For you imperial folks, imagine you tipped the scales at 200 pounds.

It’s because of the lower gravity on the Moon. Objects on the surface of the Moon experience only 16.5% of the gravity they would experience on Earth.

The mass of the Moon is only 1.2% the mass of the Earth, so you might expect it to have only 1.2% of the gravity. But it’s only 27% of the size of the Earth, so when you’re standing on the surface of the Moon, you’re much closer to its center of gravity.

Therefore, On the moon you weigh 6 times lighter so for this problem you multiply 140n by 6.

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Answer:

Social media has helped many businesses grow and promote itself, and has helped people find a better way to connect and communicate with one another. On the other hand, it's also provided many people with problems involving mental health, emotional insecurities, and waste of time

Explanation:

what they said is correct

Globalization alludes to the expanded interconnectedness between various regions of the planet. The interaction is a kind of shared trade of values, standards, and contemplations. All of the cooperating societies are profited from the culture.

Globalization has various numerous actual signs as confirmed by the consistent development of items, products, and administrations that cross worldwide boundaries consistently. The Worldwide South which sends its wares into an unpredictable market, and gives modest work to the world's large companies, has long voiced its mistake at the unfairness of inconsistent exchange relations and global administrative associations.

The obtrusive improvement in the South to support the development based economies in the North has a negative relationship with a reasonable climate (Iqbal). Hence, they see firsthand the social and ecological repercussions that a culture of utilization makes on the planet.

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Explanation:

If there are more reactants than products, it is a synthesis reaction. If oxygen is a part of the reactant, it is a combustion reaction. If one ion replaces another, it is a single replacement reaction. If there are two compounds in a reactant where cations switch, it is a double replacement reaction.

Answer:

A simple pulley is a wheel with a rope that allows you to pull one end and have it lift whatever is on the other end. A modern, common example of this is a crane, often used in construction.

Explanation:

When he swings a rubber bung around his head on a string, the centripetal force is caused by the tension in the string.

When an object travels in circular path, a force which makes an object to continue to move in circular motion is the centripetal force which is directed towards the center of the path.

Thus, When he swings a rubber bung around his head on a string, the tension force is developed in the string which is in turn balanced by the centripetal force.

Thus, the centripetal force is caused by the tension in the string.

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When white light strikes a prism, it undergoes a process called refraction, which is the bending of light as it passes from one medium to another with a different refractive index.

The amount of bending depends on the wavelength of the light and the angle at which it enters the prism.

Different wavelengths of light bend at different angles, causing the white light to separate into its constituent colors, known as a spectrum. This process is known as dispersion. The shorter wavelengths of violet and blue light bend more than the longer wavelengths of orange and red light, causing the colors to separate with violet and blue light bending the most and red light bending the least. This results in a rainbow-like spectrum of colors, with violet on one end and red on the other.

This occurs because the refractive index of the prism is different for each wavelength of light. The refractive index of a material is a measure of how much it slows down the speed of light passing through it, and it varies with the wavelength of the light. As a result, each wavelength of light bends at a slightly different angle as it passes through the prism, causing the colors to separate.

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Answer:

I think it is but I don't know for sure

Explanation:

41 101001

41 is 101001 on the binary table i think

Answer:

D

Explanation:

because the glaciers melt adding more water into the sea which make the sea levels rise.

The pressure will 657 MM Hg.

The relationship between pressure and temperature for a fixed volume of an ideal gas can be described by the Ideal Gas Law: PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin.

P1 = (700 mm Hg) x (101.3 kPa / 1 mm Hg) = 70,910 Pa

T1 = (50 + 273.15) K = 323.15 K

T2 = (30 + 273.15) K = 303.15 K

P2 = (70,910 Pa) x (303.15 K / 323.15 K) = 65,688 Pa

Therefore, the pressure at a temperature of 30°C while keeping the volume constant would be 65,688 Pa, which is equivalent to 657 mm Hg.

Since the volume is constant in this case, we can see that the pressure is directly proportional to the temperature. Therefore, if we decrease the temperature by 20°C, the pressure will also decrease by a factor of (T2/T1)(1-γ), where γ is the adiabatic index of the gas. In reality, the pressure will not decrease exactly as calculated using the Ideal Gas Law, since the gas is not an ideal gas and the volume may not remain constant. However, the Ideal Gas Law provides a useful approximation in many situations.

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Answer:

The cliff is 12.632 meter high.

Explanation:

Each stone experiments a free fall motion, that is, an uniformly accelerated motion due to gravity. We construct the respective equations of motion for each stone:

First stone

\(y_{1} = y_{o,1} +v_{o,1}\cdot t +\frac{1}{2}\cdot g\cdot t^{2}\) (1)

Second stone

\(y_{2} = y_{o,2} +v_{o,2}\cdot (t-2) +\frac{1}{2}\cdot g\cdot (t-2)^{2}\) (2)

Where:

\(y_{1}\), \(y_{2}\) - Final height of the first and second stone, in meters.

\(y_{o,1}\), \(y_{o,2}\) - Initial height of the first and second stone, in meters.

\(v_{o,1}\), \(v_{o,2}\) - Initial speed of the first and second stone, in meters per second.

\(t\) - Time, in seconds.

\(g\) - Gravitational acceleration, in meters per square second.

If we know that \(y_{o,1} = y_{o,2}\), \(y_{1} = y_{2} = 0\,m\), \(v_{o,1} = 0\,\frac{m}{s}\), \(v_{o,2} = -30\,\frac{m}{s}\) and \(g = -9.807\,\frac{m}{s^{2}}\), then we find that time when both stones hit the ground simultaneously is:

\(4.904\cdot t^{2} = -30\cdot (t-2)+4.904\cdot (t-2)^{2}\)

\(4.904\cdot t^{2} = -30\cdot t + 60 +4.904\cdot (t^{2}-4\cdot t +4)\)

\(-30\cdot t +60 -19.616\cdot t +19.616 = 0\)

\(49.616\cdot t = 79.616\)

\(t = 1.605\,s\)

The height of the cliff is:

\(y_{1} = y_{o,1} +v_{o,1}\cdot t +\frac{1}{2}\cdot g\cdot t^{2}\)

\(y_{o,1} = 12.632\,m\)

The cliff is 12.632 meter high.

The total distance covered by the bird when it flies to the finish line and back to the runner is 9.3 km.

The total total distance travelled by the bird in flying from the runner to the finish line and back to the runner is calculated as follows:

Initial distance from the runner to the finish line = 6.2 km

Time taken by the bird to reach the finish line from the initial position of the runner = 6.2/15 * 60 mins = 24.8 mins

Time it will take the runner to get to finish line = 6.2/5 * 60 = 74.4 mins

Distance traveled by the runner from L after 24.8 mins will be:

Distance traveled by the runner from L = 5 * 24.8/60

Distance traveled by the runner from L  = 2.07 km

Remaining distance to be covered = 6.2 - 2.07 = 4.13

The ratio of the speed of the bird and the runner = 1 : 3

Total ratio = 4

Distance covered by bird in returning = 3/4 * 4.13 = 3.1 km

Total distance covered by the bird = 6.2 + 3.1 km

Total distance covered by the bird = 9.3 km

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The relationship between distance of travel and the roundness of a particle can be complex and depend on the specific conditions of the system.

The relationship between the distance of travel and the roundness of a particle can depend on various factors such as the type of particle, the medium in which it is traveling, and the conditions under which it is being observed.

In general, for particles that are moving through a fluid medium such as air or water, the roundness of the particle can affect its drag coefficient, which in turn can affect its distance of travel. A more streamlined, less round particle will generally experience less drag and travel further than a more spherical, round particle.

However, the relationship between distance of travel and roundness can also depend on other factors such as particle size and density, as well as the speed and direction of the fluid flow.

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The work per unit mass done by the piston is 300 \(\frac{kJ}{kg}\).

At state 1 for steam

\(P_{1}\)= 101. 325 kpa

\(T_{1}\)= 400K = 127 °C

Now, see from the property table

\(u_{1}\)= 2550 \(\frac{kJ}{kg}\)

Now, at State 2

\(P_{2}=101.325\times 4=405.3\)kpa

\(T_{2}\)=600K= 327 °C

Now, see from the property table

\(u_{2}\)=2850 \(\frac{kJ}{kg}\)

Now, the work done is W which is given by

The definition of work done includes both the forces applied to the body and the total displacement of the body.

A constant force F is present before to this block. The goal of this force is to move the body d meters in a straight line in the force's direction.

W=\(u_{2}-u_{1}\)

W=2850-2550

W=300 \(\frac{kJ}{kg}\)

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The best pie crust is a perfect balance between fat, flour, and liquid.  is

To make a perfect pie dough .

"Pie" was the word for a magpie before it was a word for a pastry, from the Latin word for the bird, Pica (whence the name of the disorder that makes you eat weird things). Pica morphed into "pie" in Old French, following the proud French tradition of actually pronouncing as few consonants as possible.

pie, dish made by lining a shallow container with pastry and filling the container with a sweet or savoury mixture. A top crust may be added; the pie is baked until the crust is crisp and the filling is cooked through.

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The ideal proportion of oil, flour, and liquid goes into making the greatest pie crust. is to create the ideal pie dough.

Before it became a term for a baked food, "pie" was the Slang phrase for bird, Pix (whence the name of the disorder that makes you eat weird things). Following their noble French custom of genuinely speaking as few letters as possible, pica evolved into "pie" during Old French.

Pie is a dish that is created by lining the shallow dish with dough and filling it with either a sweet or spicy combination. Its pie is heated until the filling is heated all the way through and the top crust is crunchy.

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Speed is defined as distance covered per unit of time. The speed of the person is 8.33 meters per second.

In this case, the distance covered by the person is 1500 meters and the time taken is 3 minutes. However, we need to convert the time to seconds as the standard unit for speed is meters per second.

So,

3 minutes = 3 x 60 seconds = 180 seconds

Therefore, the speed of the person can be calculated as:

Speed = Distance / Time

Speed = 1500 meters / 180 seconds

Speed = 8.33 meters per second

Hence, the speed of the person is 8.33 meters per second.

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Answer:

The volume of the object is 3.5cm³

When a material in liquid state is given energy, it changes its phase from liquid to vapor; the energy absorbed in this process is called heat of vaporization. The heat of vaporization of water is about 2,260 kJ/kg, which is equal to 40.8 kJ/mol. The vaporization is the opposite process of condensation.

hope this helped <3

Therefore, the velocity of the ball just before it hits the ground is approximately 22.1 m/s. Therefore, the closest value to this option is 21.0 m/s.

When a ball of mass 0.25 kg falls from a height of 50 m, we can calculate its velocity using the principle of conservation of energy. According to this principle, the sum of the potential and kinetic energy of an object remains constant.

Therefore, we can equate the potential energy at the initial height to the kinetic energy at the final velocity.Let's calculate the potential energy of the ball at the initial height

:Eg = mghEg = 0.25 kg × 9.81 m/s² × 50 m

Eg = 122.625 J

This is the energy that the ball has due to its position. As it falls, this energy is transformed into kinetic energy. At the moment the ball reaches the ground, all the potential energy has been transformed into kinetic energy

.Ek = 1/2mv²Ek = Egv² = 2Ek/mv = √(2Ek/m)

Let's plug in the values we obtained:Eg = 122.625 Jm = 0.25 kgv = √(2Ek/m)

We obtain:v = √(2 × 122.625 J / 0.25 kg)v = √(245.25 J/kg)v = 22.116 m/s

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The direction of impulse is the direction of net force and linear momentum is referred to as true statement.

This is referred to as a certain amount of force you apply for a certain amount of time to cause a change in momentum.

It is also known as the integral of a force, F, over the time interval, t, for which it acts and is a vector quantity and the direction is also equal to the direction of the net force and linear momentum which is therefore the reason why true was chosen as the correct choice.

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Answer:

C. 199.9 s

Explanation:

3 minutes = 3×60 = 180 seconds.

the turtle moves in that time 180×10 = 1800 cm.

in other words the rabbit gave it that much head-start (it does not matter if that was at the begin of in the middle of the race).

the rabbit moves with 10×10cm/s = 100cm/s.

the rabbit needs therefore 1800/100 = 18 seconds for the

1800 cm.

at that time the turtle has added another 18×10 = 180 cm.

for which the rabbit needs 180/100 = 1.8 seconds.

during that time the turtle has added 1.8×10 = 18 cm.

and so on.

in formal mathematics this looks like this :

1800 + 10x = 100x

after x seconds of the rabbit running both will have run the same distance, and it is a tie.

1800 = 90x

x = 20 seconds

so, at that point, the rabbit was actively running for 20 seconds and raced 20×100 = 2000 cm

and the turtle was actively running for 180 + 20 = 200 seconds, and also covered 200×10 = 2000 cm.

but our question tells us that the turtle won by 10 cm.

so, the race was over a little bit before these 200 seconds (for a tie).

this means, the rabbit could not run the last 10 cm for the tie (because the race was over and the turtle had won).

the rabbit would have needed 10/100 seconds for these 10 cm.

as speed = distance/time

we need to divide distance by speed

distance/1 / distance/time

to get time.

so,

10cm/1 / 100cm/s = 10s/100 = 1/10 s

so, we need to deduct this 1/10 s from the 200 seconds of the turtle (and also from the 20 seconds for the rabbit).

the race lasted of course the whole time the turtle was running (while the rabbit was resting, officially still participating in the race with speed 0 for 3 minutes).

and so, the race was 199.9 s long.

According to the law of conservation of mass, during the chemical reaction, no mass is created or destroyed. For example carbon in the coal, burn to give carbon dioxide. The solid structure of carbon change into gas but the mass of carbon remains the same.

The law of conservation of mass can be described as an isolated system the mass can neither be created nor be destroyed but can be converted from one form to another.

According to this law, the mass of the reactants in the chemical reaction must be equal to the mass of the products. Therefore, every balanced chemical reaction follows the law of conservation of mass.

For example, to get one molecule of H₂O (water) with a molecular weight of 10, Hydrogen with a molecular weight of 2 is added with Oxygen with a molecular weight of 8, thereby conserving the mass.

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Answer:

2. wavelength

3. Crest

4. Rest

5. Trough

6. Amplitude

Explanation: