PLS URGENT!!
A radio station sending out a radio wave of frequency 100.5MHz at velocity of 3×10⁸ms⁻¹. At what wavelength is the radio station broadcasting

False, all sounds are flucuations that hinders the preception of a signal. So by that standard, everything is a noise.

This question involves the concepts of density, volume, and mass.

(a) The volume occupied by this amount of water is "90 m³".

(b) The length of an edge of each small cube is "83 μm".

(c) The length of the edge of each small cube is "equal" to the diameter of a molecule.

(a)

The volume can be found using the following formula:

\(V = \frac{nM}{\rho}\)

where,

V = volume occoupied = ?

n = no. of moles = 5 mol

M = molar mass = 18 g/mol

\(\rho\) = density of water = 1 g/m³

Therefore,

\(V=\frac{(5\ mol)(18\ g/mol)}{1\ g/m^3}\\\\\)

V = 90 m³

(b)

First, we will find the volume of an individual molecule:

\(V_i =\frac{V}{nN_A}\)

where,

\(N_A\) = Avogadro's number = 6.02 x 10²³ molecules/mol

Therefore,

\(V_i=\frac{90\ m^3}{5\ mol(6.02\ x\ 10^{23}\ molecules/mol)}\)

Vi = 3 x 10⁻²³ m³

This volume can be given as a volume of the sphere:

\(V_i=\frac{4}{3}\pi r^3\\\\r=\sqrt[3]{\frac{3(3\ x\ 10^{-23}\ m^3)}{4\pi}}\)

r = 4.15 x 10⁻⁷ m

Diameter = d = 2r = 2(4.15 x 10⁻⁷ m)

d = 8.3 x 10⁻⁷ m = 83 μm

since the cubes are adjacent to each other. Therefore, the diameter will be equal to the edge length.

Edge Length = L = d

L = 8.3 x 10⁻⁷ m = 83 μm

(c)

The edge length is equal to the diameter of the molecule.

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a) The four-bar mechanism shown in Figure 2 can be classified as a crank-rocker mechanism.

b) The specific behavior of the mechanism in each configuration will depend on the lengths of the links and the arrangement of the joints.

a) In this type of mechanism, one link (the crank) rotates continuously, while another link (the rocker) oscillates back and forth.

b) To understand the possible motions of the mechanism, let's fix the links a, e, and d one by one while observing the resulting motions:

Fixing link a: When link a is fixed, it becomes the base or frame of the mechanism. The other links (b, c, and d) can rotate and translate relative to a. In this configuration, the mechanism can exhibit a combination of rotating and translating motions.

Fixing link e: When link e is fixed, it becomes the base, and the mechanism transforms into a different four-bar linkage. The remaining links (a, b, and c) can move relative to e. The resulting motion will depend on the specific configuration of the links and their lengths.

Fixing link d: When link d is fixed, it acts as a fixed pivot point. The other links (a, b, and c) can rotate and translate around d. This configuration can create a variety of motions, such as swinging or oscillating motions.

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NOTE- The digram is not avaliable in the serch engine.

Answer:

to meet at a single point

(causing rays of light that are initially parallel to meet at a single point)

hope this helps:)

Explanation:

Answer:

focus

Explanation:

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A. The average speed you can use to pull the safe is 1.02 m/s

B. The time needed to pull the safe up is 17.65 s

First, we shall obtain the force. This is shown below:

F = mg

F = 60 × 9.8

F = 588 N

Finally, we shall obtain the average speed. Details below:

Power = force × average speed

600 = 588 × average speed

Divide both sides by 588

Average speed = 600 / 588

Average speed = 1.02 m/s

The time needed to pull the safe up can be obtained as follow:

Time = Total distance / average speed

Time = 18 / 1.02

Time = 17.65 s

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Complete question:

You know you can provide 600 W

of power to move large objects. You need to move a 60-kg

safe up to a storage loft, 18 m

above the floor.

Part A

With what average speed can you pull the safe straight up?

Part B

What is the time needed to pull the safe up?

0.24 m  distance  through which the piston rises.

we have given the mass of piston+block = 135kg

2050 joule of heat flows into the gas

now;

According to first law thermodynamics,

dQ=du+dw

we have

2050=1730+MgS

Here M is mass, g is gravity, S is distance

now puttin gthe formula

MgS=320

S=320/1323

S= 0.24m

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Answer:

1.142

Explanation:

Answer:

ummm I didn't understand the question

Explanation:

Friction acts between two surfaces in contact only and opposes the movement of one body with respect to another. Therefore friction is a force which opposes the relative motion between two bodies. If a body is moving it is slowed down by frictional force applied on it by the surface on which it is moving.

The boat must have moved, despite not being seen to move, because its relative position to the dock has changed. This phenomenon is known as relative motion .

Everything is always in motion, but the way we perceive it depends on our frame of reference.

In this scenario, the dock was the frame of reference for the initial position of the boat. When the boat moved to the cove, its position relative to the dock changed, and the dock was no longer an appropriate frame of reference. The boat's motion is now relative to the cove instead.

It is important to note that relative motion depends on the chosen frame of reference. If we were to choose the boat as the frame of reference, then it would be the dock that appears to move, not the boat. This is because motion is always relative to a chosen frame of reference.

In conclusion, the boat must have moved because its position relative to the dock changed. The concept of relative motion reminds us that motion is always relative to a chosen frame of reference, and that the way we perceive motion depends on our chosen frame of reference.

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Because it's so much closer to us than any other star.

Answer:

you didnt finish the question but im guessing the answer is matters what each airplane is built out of even though they have the same engine they will perfrom diffrently depending on the material their made out of.

Answer:

The answer is 0.042 Hz (rounded)

or 0.0417 Hz

Explanation:

Hope it helps

Answer:

The answer is 0.041Hz

Explanation:

The answer is 0.041Hz

I guess

The kinetic energy would be at its maximum compared to the potential energy which would be less. The potential energy of the first and the last pendulum would be at their maximum

Kinetic energy is the energy an object possesses due to its motion. It is defined as the energy that an object has by virtue of its motion, and is dependent on both its mass and velocity. The formula for calculating kinetic energy is 1/2 times the mass of the object times the square of its velocity, or KE = 1/2 mv^2.

This means that the kinetic energy of an object increases as its mass and velocity increase. For example, a heavy object moving at a high velocity will have a higher kinetic energy than a lighter object moving at a lower velocity. Kinetic energy is a scalar quantity, meaning it has no direction, only magnitude.

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There is no gap in Earth's crust due to presence of magma beneath the Earth crust which usually erupt to fill the gap in the Earth crust.

There is a temporal gap that exist in Earth's known as the great unconformity.

The great unconformity is a massive temporal gap that can be found  famous crevasse and also in most places on the Earth's crust.

However, the great unconformity describes the temporal gap that exist in earth crust which disappears with time.

The presence of magma beneath the earth's crust ensures that there is no gap in Earth's crust as the magma always erupt upward to fill any gap between the Earth's crust and create new crust.

Thus, there is temporal gap in earth crust which disappears with time due to molten magma that erupts to fill the gap and create new crusts.

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There is a negative correlation between mass and acceleration.

option B is the correct answer.

The net force applied on an object is the sum of the all the forces acting on an object.

According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.

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

F = ma

where;

a = F/m

Thus, acceleration and mass are inversely related. That is as the mass of an object increases, the acceleration of the object decreases provided that the applied force remains constant.

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Hi there!

Recall Ampere's Law:
\(\oint B \cdot dl = \mu_0 i_{encl}\)

B = Magnetic Field Strength (T)
μ₀ = Permeability of Free Space (Tm/A)

i =  Enclosed Current (A)

dL = differential path length

To begin, we must derive an expression for the magnetic field strength inside a wire that contains a uniformly-distributed current.

Using the expression:

\(i = \int J \cdot dA\)

Where 'J' is the density of current, and A is the cross-sectional area:
\(A = \pi r^2\\\\dA = 2\pi r dr\)

We know that:
\(J = \frac{i_0 }{A}\\\\J = \frac{i_0}{\pi a^2}\)

This is the current density. We can now integrate:

\(i = \int\limits^r_0 {\frac{i_0}{\pi a^2} \cdot 2\pi r} \, dr\\ \\i =\frac{i_0}{a^2}\int\limits^r_0 {2r } \, dr\\\\i = \frac{i_0}{a^2} \cdot r^2 = \frac{i_0 r^2}{a^2}\)

Now, substitute this expression back into the above equation for the magnetic field:
\(\oint B \cdot dl = \mu _0 \frac{i_0r^2}{a^2}\)

The path of integration is a closed loop of length 2πr, so:
\(B \cdot 2\pi r = \mu_0 \frac{i_0r^2}{a^2}\\\\B = \frac{\mu_0 i_0r}{2\pi a^2}\)

We can now use this equation for the first 2 parts.

a)
If 'r' equals 0:
\(B = \frac{\mu _0 i_0 (0)}{2\pi a^2} = \boxed{0 T}\)

b)

If 'r' equals a/2:
\(B = \frac{\mu _0 i_0 (\frac{a}{2})}{2\pi a^2} =B =\boxed{ \frac{\mu _0 i_0 }{4\pi a} T}\)

c)
At the wire's surface, 'r' = a:
\(B = \frac{\mu _0 i_0 (a)}{2\pi a^2} =B =\boxed{ \frac{\mu _0 i_0 }{2\pi a} T}\)

d)

At 'r' = 2a, since this is outside of the wire, the relationship between magnetic field and distance from the wire becomes a 1/r (inverse) relationship. This is found using Ampere's Law:
\(B = \frac{\mu_0 i_0}{2\pi r}\\\)

\(B = \frac{\mu_0 i_0}{2\pi (2a)} \\\\\boxed{B = \frac{\mu_0 i_0}{4\pi a}\\}\)

The radius of the Rigel bright blue star and the procyan B is found to be   5.4x10¹⁰m and 5.4x10⁶m

Using the surface radiation formula P (energy per second in Watt) = emissivity constant * surface area * Stefan-boltzmann constant * temperature in kelvin4*.

2.7x10³¹ = 1x5.67x10⁻⁸xAx11000⁴

Making A Formula Subject = 2.7x10³¹/ (5.67*10⁻⁸x1.46x10¹⁶) = 0.3261x10²³m²

The surface area = 4R² since the form is a spherical (radius of the Rigel)

R = √ (0.3261x10²³/ 4π) = 5.1 x 10¹⁰m

The radius of the Rigel star is 5.1 x 10¹⁰m.

B) repeating the previous step

2.1x10²³ = 1xAx5.67x10⁻⁸x1000⁴, where A is the Procyon's surface area.

Creating a formula topic,

A = 2.1x10²³/(5.67x10⁻⁸x10¹⁶)

A = 0.37x10¹⁵

The star is thought to be a spherical;

A = 4R², where R is Procyon's radius.

R = √(0.37x10¹⁵/4π) = 5.4x10⁶m

The radius of the Procyan B is  5.4x10⁶m.

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The answer is  energy 3 times as much. option A.

To calculate the amount of energy released when a 5 kg object is converted to pure energy, we can use Einstein's famous equation: E = mc². In this equation, E represents energy, m represents mass, and c represents the speed of light.

Given that the mass of the object is 5 kg, we can calculate the energy using the equation:

E = (5 kg) * (c²)

Now, to compare this energy with the amount of energy the Earth receives from the Sun every second, we need to determine the Earth's solar energy input.

The solar constant is the amount of solar radiation received per unit area at the Earth's distance from the Sun. Its average value is approximately 1361 Watts per square meter (W/m²). Multiplying this value by the surface area of the Earth (approximately 510 million square kilometers), we can estimate the total energy received by the Earth from the Sun every second.

Energy from the Sun = (1361 W/m²) * (510,000,000,000 m²)

To compare the energy released from converting a 5 kg object to energy with the energy received from the Sun, we divide the former by the latter:

Energy conversion / Energy from the Sun = [(5 kg) * (c²)] / [(1361 W/m²) * (510,000,000,000 m²)]

Simplifying the equation, we find:

Energy conversion / Energy from the Sun = (5 kg * c²) / (1361 W/m² * 510,000,000,000 m²)

The value of c² is approximately (3x10^8 m/s)² = 9x10^16 m²/s².

Plugging in the values, we get:

Energy conversion / Energy from the Sun = (5 kg * 9x10^16 m²/s²) / (1361 W/m² * 510,000,000,000 m²)

Simplifying further:

Energy conversion / Energy from the Sun ≈ 3.52

Therefore, the amount of energy released when a 5 kg object is converted to pure energy is approximately 3.52 times larger than the amount of energy the Earth receives from the Sun every second.

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The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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Answer:

Kinetic energy.

The explanation never existed

Answer: Kinetic Energy

The chi-square test indicates that the observed data is statistically significant, as the chi-square value of 29.25 is greater than the critical value of 7.815 at the 0.05 significance level and three degrees of freedom.

The chi-square test is a statistical test used to determine if there is a significant difference between observed frequencies and expected frequencies in one or more categories. It is commonly used in hypothesis testing to compare the observed data to expected data, and to measure how well a particular model fits the data. The chi-square statistic is calculated by subtracting the expected frequencies from the observed frequencies, squaring each of the differences, and then summing them. The result is then compared to a chi-square table to determine the probability that the observed data did not differ from the expected data.

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Given

{2, 4, 8, 16, ...}

Procedure

A recursive formula allows us to find any term of a geometric sequence by using the previous term.

Because a geometric sequence is an exponential function whose domain is the set of positive integers, and the common ratio is the base of the function, we can write explicit formulas that allow us to find particular terms.

i) The initial deceleration of the car is -1.6 m/s² and  the time taken is 5 seconds

ii) The final deceleration is -1 m/s²

iii) The total dispalcement = 1016 m

The initial deceleration of the car is given by the formula below:

v² = u² + 2as

where;

Solving for a;

12² = 20² + 2 * a * 80

a = -1.6 m/s²

Time taken, t = v - u / a

t = 12 - 20 / (-1.6)

t = 5 seconds

Final deceleration:

a = v - u / t

a = 0 - 12 / 12

a = -1 m/s²

iii) Displacement at constant velocity = 12 * 1 * 60

Displacement at constant velocity = 720 m

Final displacement, s = ut + 0.5at²

s = 12 * 12 + 0.5 * 1 * 12²

s = 216 m

Total dispalcement = 80 + 720 + 216

Total dispalcement = 1016 m

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A 36 n crate starting at rest slides down a ramp set a 37 degrees before continuing to slide an additional 3.3 meters along the ground. So, the coefficient of kinetic friction between the crate and the surface of the ground is 0.19.

By applying newtons laws of motion we know,   ∑Fy = n–mgcosθ=0.

Hence, n = mgcosθ.

Now, f = μkn

Now, μk = f/mgcosθ.

By calculating by the above formula coefficient of kinetic friction comes out to be 0.19.

Kinetic friction - Kinetic friction is the name given to the force that exists between moving surfaces. The movement of a body on the surface is opposed by a force that is perceived. The magnitude of the force will depend on the kinetic friction coefficient between the two materials. Friction is simply the force that prevents something from slipping. Every object suffers kinetic friction, which prevents two or more things from moving at the same time. The force acts in the opposite direction from the direction that an object wants to slide as it slides. Friction also plays a significant role in routine tasks like rubbing two things together. In some instances, the heat generated by the ensuing motion ultimately starts a fire. Oil is required to lubricate machine parts because it reduces friction, which also contributes to wear and tear. When two objects rub against one another, the frictional force that results is converted into thermal energy, which occasionally starts a fire Machine parts need to be lubricated with oil to prevent wear and tear caused by kinetic friction.

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Explanation:

6) newton

7) f =ma = 15*15 = 225N

8) a= 100/20 = 5ms^-2

Answer:

6 newton

7) f =ma = 15*15 = 225N

8) a= 100/20 = 5ms^-2

Explanation:

this is right pls mark as brainliest