The lower_bound() method of C++ returns the index of the first element in the array which has a value not less than the key.

The main difference between a radio wave and a sound wave is its "long answer" frequency and wavelength.

Radio waves are a type of electromagnetic radiation that have a much higher frequency and longer wavelength than sound waves. This means that radio waves can travel over longer distances and penetrate through solid objects like walls and buildings, while sound waves cannot.

On the other hand, sound waves are a type of mechanical wave that travel through matter, such as air, water, or solids. They have a much lower frequency and shorter wavelength than radio waves. Sound waves are responsible for the sensation of hearing and can be generated by sources such as speakers, musical instruments, and the human voice.
So, while both radio waves and sound waves are types of waves, their fundamental differences lie in their frequency and wavelength.

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Answer:

DE HECHO EL SONIDO DÍ PUEDE ATRAVESAR LAS PAREDES, PERO

CUANDO ENTRA EN LA PARED, EL SONIDO VIAJA MÁS RÁPIDO QUE EN EL

AIRE Y CUANDO SALE DEL OTRO LADO, EL SONIDO VA A UNA

VELOCIDAD ALTA, POR ESTO LSA VOCES SE ESCUCHAN AUNQUE NO

MUY CLARAS.

Explanation:

The net torque required to accelerate is 28496 Nm.

The net torque required to accelerate a uniform disk of radius 7.5 m and mass 29000 kg from rest to 0.63 rad/s in 27 s is needed.

The problem is asking for the net torque required to accelerate a merry-go-round from rest to a final angular velocity of 0.63 rad/s in 27 seconds. The merry-go-round is assumed to be a uniform disk, which means that its mass is evenly distributed across its entire radius. We are also given the radius of the merry-go-round (7.5 m) and its mass (29000 kg).

To solve the problem, we can use the formula:

\(τ = Iα\)

where τ is the net torque applied to the merry-go-round, I is its moment of inertia, and α is its angular acceleration. Since the merry-go-round is initially at rest, its initial angular velocity is zero. Using the formula for angular acceleration, we can find that:

\(α = Δω/Δt = (0.63 rad/s - 0 rad/s) / 27 s = 0.0233 rad/s^2\)

To find the moment of inertia of the merry-go-round, we can use the formula for the moment of inertia of a uniform disk:

\(I = (1/2)mr^2\)

where m is the mass of the disk and r is its radius. Substituting the given values, we get:

\(I = (1/2)(29000 kg)(7.5 m)^2 = 1220625 kg m^2\)

Finally, we can use the formula \(τ = Iα\) to find the net torque required to accelerate the merry-go-round:

\(τ = (1220625 kg m^2)(0.0233 rad/s^2) = 28496 Nm\)

Therefore, the net torque required to accelerate the merry-go-round is 28496 Nm.

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Answer: The correct answer is graph A.

Explanation:

See Khan Academy.

Answer: it C

Explanation:

Answer:

False

Explanation:

When a ball is rolling down an inclined plane without slipping, the force responsible for causing its rotation is the frictional force. This force acts between the surface of the ball and the surface of the inclined plane, in the opposite direction to the direction of the ball's motion.

Frictional force causes a torque on the ball, which leads to its rotation. It is important to note that the frictional force acts only when the ball is rolling without slipping. If the ball is slipping, then the force responsible for its rotation would be the external force applied to the ball.

In summary, when a ball is rolling down an inclined plane without slipping, the frictional force is responsible for its rotation.
If a ball is rolling down an inclined plane without slipping, the force responsible for causing its rotation is the frictional force. When the ball rolls down the inclined plane, gravity pulls it downwards, which results in a component of force parallel to the inclined plane. This force tries to make the ball slide down the incline.

However, if there is sufficient friction between the ball and the surface, the frictional force acts in the direction opposite to the motion of the ball, preventing it from slipping. As the ball rolls, the point of contact between the ball and the surface momentarily comes to rest, which allows the frictional force to generate torque. This torque causes the ball to rotate around its center of mass, maintaining its rolling motion without slipping.

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A spring of force constant 120 N/m acted up by a constant force of 240N. Then, the elastic potential energy stored in the spring is 240 Nm.

The elastic potential energy stored in the spring is formulated as follows

                                                 PE = ½kx²

Where PE is the elastic potential energy, x is the displacement of the spring from its equilibrium position, and k is the spring force constant.

In this question, the spring force constant is 120 N/m, and the constant force acting on the spring is 240 N. To find the spring displacement, we can use the formula:

F = kx

Where F is the force acting on the spring, x is the displacement, and k is the force constant,

So that:

F = kx

240 N = 120 N/m . x

x = 240 N/120 N/m

x = 2 m

Once x is known, then we can calculate the potential energy of the spring:

PE = ½kx²

PE = ½ (120) (2²)

PE = 60 x 40

PE = 240 Nm

So, the elastic potential energy stored in the spring is 240 Nm.

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The power delivered during this time is 358.4 Watts (rounded to the nearest tenth).

The equation is Power (P) = Work (W) / Time (t).

When calculating work, force (F) and distance (d) are multiplied:

Work (W) is equal to force times distance.

Given:

First, let's calculate the work:

Work (W) = Force (F) * Distance (d)

W = 128 N * 1.4 m

W = 179.2 Joules

Now, we can calculate the power:

Power (P) = Work (W) / Time (t)

P = 179.2 J / 0.5 s

P = 358.4 Watts

Therefore, the power delivered during this time is 358.4 Watts .

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Answer:

the answer to this question is A

Answer:

It is D. Almost no mass

Explanation:

The mass of an electron is 1/2000 times of proton/neutron

The vertical and horizontal parts of a projectile are perpendicular and independent of one another over a short distance.

Depending on the force imposed on it, horizontal motion is defined as a projectile motion in a horizontal plane. The vertical and horizontal parts of a projectile are perpendicular and independent of one another over a short distance.

Throughout the course of a projectile's flight, the horizontal component of its speed remains constant. This is because the projectile experiences no horizontal force after being launched. As a result, the projectile moves horizontally at a fixed speed.

The following equation is used to determine how far a bullet travels;

d = vt, where

t = Time

d = Distance

v = velocity

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ANSWER

Mass: The resistance of an object to acceleration, size-dependent

Volume: The amount of space an object occupies

Boiling point: The temperature at which a liquid boils and turns to vapor.

Melting point: The temperature at which a solid melts and turns to liquid

Density: Size-independent

Solubility: The ability of a substance (solvent) to dissolve when placed in a liquid (solute)

Magnetism: Size-dependent

EXPLANATION:

Mass: the more mass something has, the harder it is to accelerate. This is somewhat intuitive, but is also demonstrated in newton's third law. It's size-dependent because for an object of a given density, the size (volume) will change the mass.

Volume: big objects take up more space. If you put an apple in bucket filled to the brim with water, a little water will splash out, because the apple is now occupying the space that the water used to, but if you put in a watermelon, a lot of water will splash out, because the watermelon is taking up even more space.

Boiling point: when a liquid gets too hot, it will change to gas (example: water to steam)

Melting point: when a liquid gets too cold, it will change to a solid (example: water to ice)

Density: how much mass there is in a given volume. A sphere made of lead will have more mass than a sphere made of wood, even if they are the same size. Size-independent because a big lead sphere has the same density as a small lead sphere, they just have different masses.

Solubility: some substances dissolve in certain solvents, other's don't.

Magnetism: size-dependent because a bigger magnet is stronger than a smaller one if they are identical in every other way. More space means more domains means a stronger magnet.

Answer:

i agree

Explanation:

The surface conditions on Venus are more extreme than on Earth, with temperatures ranging from 453 to 473 °C and pressures of 95 bar.

Venus's surface is more hostile than Earth's, with temperatures between 453 and 473 °C and pressures of 95 bar. Venus is devoid of water, which strengthens the crustal rock and preserves surface characteristics. The observed characteristics demonstrate the geological processes at play.

Venus lacks surface water and has a poisonous, thick atmosphere that is nearly completely formed of carbon dioxide and sulphuric acid clouds. The atmospheric pressure at the surface of Venus is almost 90 times greater than that of the Earth at sea level. At a scorching 750 K (477 °C), Venus' surface is the solar system's warmest.

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The horizontal velocity of the ball is 3.76 m/s.

The horizontal velocity of the ball is calculated by applying the following equation as shown below;

X = Vₓt

where;

The time of motion of the ball from the table is calculated as follows;

t = √(2h/g)

where;

t = √(2 x 0.994 / 9.8)

t = 0.45 seconds

The horizontal velocity of the ball is calculated as;

Vₓ = X / t

Vₓ = 1.69 m / 0.45 s

Vₓ = 3.76 m/s

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Answer:

400m

Explanation:

From Newton's law of motion;

S = ut + 1/2 at2

Where U is initial velocity

a is acceleration

t is velocity hence;

S is distance covered

S = 20×10 + 1/2 × 4×(10)^2

= 200 + 200 = 400m

Answer:

"we both attract each other with the same force but we know that attraction between two bodies depends upon their mass, greater the mass of two bodies is the force of attraction between them"(got this off the internet).

Answer:

the heating method in here is conventional heating due to the warn air goes to the top bunk whereas the cold air sinks down

The velocity of a 4.5 kg object when it is halfway towards the ground after being dropped from a height of 6.0 m and given the acceleration due to gravity as 9.80 m/s² is 9.9 m/s.

This can be derived using the formula:

v² = u² + 2as

where:

v is final velocity

u is initial velocity

a is acceleration

and s is distance traveled.

Initial velocity (u) = 0 m/s

Final velocity (v) = ?

Distance (s) = 6/2 = 3m (since it is halfway toward the ground)

Acceleration (a) = g = 9.80 m/s²v²

= 0 + 2(9.80 m/s²)(3 m)v²

= 58.8 m²/s²v = √58.8 m²/s²v = 7.67 m/s (approx. 7.7 m/s)

Therefore, the velocity of the 4.5 kg object when it is halfway towards the ground is 9.9 m/s (approx. 10 m/s).

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Answer:

0.231 rev/s

Explanation:

\(m\) = Mass of cylinder

\(d\) = Diameter of the cylinder = \(13.5\ \text{m}\)

\(r\) = Radius = \(\dfrac{13.5}{2}=6.75\ \text{m}\)

\(\mu\) = Coefficient of static friction = \(0.695\)

\(N\) = Normal force = \(mr\omega^2\)

\(g\) = Acceleration due to gravity = \(9.81\ \text{m/s}^2\)

The force equation of the system will be

\(\mu N=mg\\\Rightarrow \mu\times mr\omega^2=mg\\\Rightarrow \omega=\sqrt{\dfrac{g}{\mu r}}\\\Rightarrow \omega=\sqrt{\dfrac{9.81}{0.695\times 6.75}}\\\Rightarrow \omega=1.45\ \text{rad/s}\)

Converting to rev/s

\(\dfrac{1.45}{2\pi}=0.231\ \text{rev/s}\)

The number of revolutions of the cylinder is 0.231 rev/s.

To store 50 C of charge in the same capacitor, you would have to apply a voltage of 100 V. This calculation is based on the relationship between charge, capacitance, and voltage.

The charge (Q) stored in a capacitor is directly proportional to the voltage (V) applied.

Q = C * V

where

Q = charge

C = capacitan

V = voltage.

Given:

Charge (Q1) = 5 C

Voltage (V1) = 10 V

Using the above equation, we can calculate the capacitance (C) of the capacitor:

C = Q1 / V1

C = 5 C / 10 V

C = 0.5 F

To find the voltage (V2) required to store 50 C of charge (Q2), we rearrange the equation:

V2 = Q2 / C

Substituting the values:

V2 = 50 C / 0.5 F

V2 = 100 V

Therefore, to store 50 C of charge in the same capacitor, you would have to apply a voltage of 100 V.

To store 50 C of charge in the given capacitor, the voltage applied must be 100 V. This calculation is based on the relationship between charge, capacitance, and voltage.

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Answer:

this is formula

Explanation:

Because the current flowing through both bulbs in a series connection is equal, the power P = I2R states that the 60W bulb will expend more power and so be brighter than the 40W bulb (100W bulb).

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Answer:

Two

Explanation:

Volt = Current* Resistance

Current = Volt\Resistance

Answer:

1.5 g/cm

3

Let d be the density of fluid.

So , Initial reading of balance, F

1

=30dg N

After the level reaches 50cm

3

Final reading of balance , F

2

=50dg N

Given that difference between final and initial reading is 30g

i.e, F

2

−F

1

=30 g

⟹50dg−30dg=30g

⟹20dg=30g

⟹d=

20g

30g

⟹d=1.5g/cm

3

So, density of fluid is 1.5g/cm

3

6 chairs will fit across the platform.

We have a school stage of 8 3/4 feet wide.

It's also given that each chair is 1 5/12 feet wide.

To find out the number of chairs possible we can simply divide the total length available by width of the chair.

8 3/4 = 35/4

1 5/12 =17/12

So, 35/4 / 17/12

So, the final answer comes up to 6.

so, the total number of chairs that would fit in are 6.

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Answer: Dynamic - Static Flexibility

Explanation:

Answer:

1000m=1km

simple :) . . .

Answer:

The west component of the given vector is - 42.548 meters.

Explanation:

We need to translate the sentence into a vectoral expression in rectangular form, which is defined as:

\((x, y) = (r_{x}, r_{y})\)

Where:

\(r_{x}\) - Horizontal component of vector distance, measured in meters.

\(r_{y}\) - Vertical component of vector distance, measured in meters.

Let suppose that east and north have positive signs, then we get the following expression:

\((x, y) = (-45\cdot \cos 19^{\circ}, -45\cdot \sin 19^{\circ})\,[m]\)

\((x, y) = (-42.548,-14.651)\,[m]\)

The west component corresponds to the first component of the ordered pair. That is to say:

\(x = -42.548\,m\)

The west component of the given vector is - 42.548 meters.

The correct explanation is that; "Each plastic sheet transmit a different wavelength of light." Option D

We know that light has to do with the portion of the electromagnetic spectrum that we can be able to see with the optical eyes. This is the part of the spectrum that we can be able respond to due to the fact that it is capable of creating an impression in our eyes.

The other parts of the electromagnetic spectrum are invisible to the eye even though the effects of those parts of the spectrum can still be felt from time to time.

Given the fact we can see different colors as we look through different kinds of plastic, it means that what we can see is the color that is transmitted by that particular plastic while the others are absorbed.

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If the half-life of a first-order reaction is 2.50 minutes, the rate constant is 0.277 min-1. A first-order reaction is a reaction in which the rate of conversion of reactants into products is directly proportional to the concentration of the reactants.

The rate constant of a first-order reaction if the half-life is 2.50 minutes is given by the formula k = 0.693/t1/2. It is possible to estimate the time needed for a chemical reaction to take place by determining the rate constant, which is a numerical value that describes the rate at which reactants are turned into products.

A first-order reaction is a reaction in which the rate of conversion of reactants into products is directly proportional to the concentration of the reactants. The half-life of a first-order reaction is the time it takes for the concentration of a reactant to be reduced to half of its initial value.

The rate constant of a first-order reaction can be calculated using the half-life of the reaction, which can be calculated using the formula t1/2 = ln2/k, where t1/2 is the half-life and k is the rate constant. The rate constant of a first-order reaction is given by the formula k = 0.693/t1/2, where t1/2 is the half-life of the reaction.

If the half-life of a first-order reaction is 2.50 minutes, the rate constant can be calculated as follows:k = 0.693/2.50 = 0.277 min-1. Therefore, the rate constant of a first-order reaction with a half-life of 2.50 minutes is 0.277 min-1.

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