10) Um viajante, ao desembarcar no aeroporto de Londres, observou que o valor da temperatura do ambiente na escala Fahrenheit é o quíntuplo do valor da temperatura na escala Celsius. Calcule essa temperatura

By studying the electromagnetic spectrum, the waves that have higher frequency/energy are

a) infrared waves > microwaves

b) ultraviolet rays > indigo light

c) red light > radio waves

d) yellow light > orange light

All types of light, even invisible to the human eye light, are described by the electromagnetic spectrum. In actuality, the majority of the light in the cosmos is hidden from human sight. The electromagnetic spectrum is much larger than the light we can see, which is made up of each hue in the rainbow. The parts of the electromagnetic spectrum are referred to as gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, microwaves, and radio waves, in that sequence from highest to lowest energy. The highest energy, shortest wavelengths, and highest frequency are found in gamma rays. Contrarily, radio waves are the forms of EM radiation with the lowest energy, longest wavelengths, and lowest frequencies.

To read more about the electromagnetic spectrum, visit https://brainly.com/question/16236894

#SPJ4

a)The thickness of 1000-850 hPa layer is 1462.63 m.

b) The magnitude of the horizontal pressure gradient force at an altitude of 1 km is

c)The velocity of the air parcel 5 minutes later would be 0.0033 m/s.

a) To calculate the thickness of 1000-850 hPa layer, use the hypsometric equation which is given by:

∆z = (R_dT_v/g)ln(P_1/P_2)

where R_d is the gas constant for dry air, T_v is the virtual temperature, g is the acceleration due to gravity, and P_1 and P_2 are the atmospheric pressure at the two levels.

Using the given information,P_1 = 1000 h

PaP_2 = 850 hPa

T_v = 25 °

CR_d = 287 J/(kg.K)

g = 9.81 m/s²

∆z = (287 * 25 + (2.5 * 10⁶)/9.81 * ln(1000/850)

∆z = 1462.63 m

b) To calculate the magnitude of the horizontal pressure gradient force, use the following formula:

F_g = - (∂p/∂x) = -ρg (∂z/∂x)

where F_g is the force due to gravity, ∂p/∂x is the horizontal pressure gradient force, ρ is the air density, g is the acceleration due to gravity, and ∂z/∂x is the rate of change of height with distance along the x-axis.

Using the given information,ρ = P/(R_dT_v)P = 1000 hPa

T_v = 25 °

CR_d = 287 J/(kg.K)

g = 9.81 m/s²

Let T_0 be the temperature of the half city which is not heated

T_0 = 25 °C

At a height of 1 km, the temperature would be T_1 = 25 - 0.0065 * 1000 = 18.5 °C.At a height of 0 km (i.e., surface), the temperature would be T_2 = 27 °C.

Therefore, the temperature gradient ∂T/∂x is given by:

∂T/∂x = (T_1 - T_2)/d = (18.5 - 27)/22,500∂

T/∂x = -0.0004 °C/m

The magnitude of the horizontal pressure gradient force at the surface is given by:

F_g = -ρg (∂z/∂x) = -(1000/(287 * 25)) * 9.81 * (∂z/∂x)

F_g = -3.43 (∂z/∂x)

At the surface, ∂z/∂x = 1/22.5

Therefore,F_g = -3.43 * (1/22.5)F_g = -0.1521 N/m²

The magnitude of the horizontal pressure gradient force at an altitude of 1 km is given by:

F_g = -ρg (∂z/∂x) = -(850/(287 * 18.5)) * 9.81 * (∂z/∂x)

F_g = -4.88 (∂z/∂x)

At an altitude of 1 km, ∂z/∂x = 1/22.5

Therefore,

F_g = -4.88 * (1/22.5)

F_g = -0.217 N/m²

c) To calculate the velocity of the air parcel 5 minutes later, use the formula:

v = u + at

where v is the final velocity, u is the initial velocity (which is zero), a is the acceleration, and t is the time interval.

Using the given information, let F = the force exerted on the air parcel = -F_g (negative sign to indicate the force acts in the opposite direction of x-axis)

From Newton's second law,F = ma

where m is the mass of the air parcel and a is its acceleration.

Substituting,F_g = ma = (ρV)a

where V is the volume of the air parcel.

Substituting V = 10³ m³ (since the air parcel is assumed to be a cube with each side equal to 10 m),

ρ = P/(R_dT) = 1000/(287 * 25) = 1.386 kg/m³a = (F_g)/(ρV)

a = -F_g/(ρV)a = -(-0.1521)/(1.386 * 10³)

a = 1.1 * 10⁻⁵ m/s²

Substituting,t = 5 * 60 = 300 s

Therefore,

v = 0 + at

v = (1.1 * 10⁻⁵) * 300

v = 0.0033 m/s

Learn more about acceleration at

https://brainly.com/question/13431402

#SPJ11

Answer:

21 600 m

Explanation:

4 m/s  *   3600 s / hr  * 1.5 hr  = 21 600 m

A point charge of 5.0 × 10–7 C is moving to the right at 2.6 × 105 m/s in a magnetic field that is directed into the screen and has a field strength of 1.8 × 10–2 T.

To calculate the magnitude of the magnetic force acting on the charge, we can use the formula:F = qvBsinθ

where:F is the magnetic force acting on the charge q is the chargev is the velocity B is the magnetic field strengthθ is the angle between the velocity and the magnetic field

In this case, the charge is moving perpendicular to the magnetic field, so the angle between the velocity and the magnetic field is 90 degrees, and sinθ = 1. Therefore, the formula becomes:F = qvBPlugging in the values, we get:F = (5.0 × 10–7 C) × (2.6 × 105 m/s) × (1.8 × 10–2 T)F = 2.34 × 10–13 N

Therefore, the magnitude of the magnetic force acting on the charge is 2.34 × 10–13 N.

To learn more about magnetic visit;

https://brainly.com/question/3617233

#SPJ11

When water is heated and brought to a boil, the process of boiling involves the formation of vapor bubbles within the liquid. These bubbles are composed of water vapor and they rise to the surface, causing agitation and visible bubbling in the liquid.

Near the opening of a metal container, the behavior of the water during boiling can be influenced by several factors:

1. Heat transfer: The metal container conducts heat, so the area near the opening receives heat from both the boiling water and the external heat source. This can result in a more rapid temperature increase in that region, potentially leading to faster boiling or increased bubbling activity.

2. Evaporation: As the water boils, some water molecules transition from the liquid phase to the gaseous phase through evaporation. Near the opening of the container, where the hot water vapor can escape more easily, there may be an increased rate of evaporation.

3. Increased turbulence: The rising bubbles of water vapor create movement and turbulence within the liquid. Near the opening, where the vapor bubbles can escape more readily, the water may appear more turbulent and agitated compared to areas further from the opening.

4. Cooling effect: The evaporation of water near the opening can result in a cooling effect in that region. As water molecules transition from the liquid to the gaseous state, they absorb heat energy from the surroundings, potentially causing a slight cooling effect near the container opening.

know more about Heat transfer here:

https://brainly.com/question/33246925

#SPJ8

The statement that is incorrect about scientific laws is "Laws describe a definite pattern in nature".

Scientific laws are statements, which predicts or describes a range of phenomena. A scientific law id described based on repeated experiments and observations.

As the definition describes, law predicts what might happen in a situation. So statement 1 is correct. If a law is not applicable, then the knowledge based on that law will collapse. So statement 2 is correct. Laws are descriptions of science that is made clear using mathematical equations. So statement 3 is correct.

Therefore,  "Laws describe a definite pattern in nature" is an incorrect statement.

To know more about scientific laws

https://brainly.com/question/15189105

#SPJ1

The wavelength of an electromagnetic wave decreases with increasing frequency.

The wavelength, which also refers to troughs, is the separation between two wave crests. The number of vibrations that span a particular area in a second is known as the frequency, which is measured in cycles per second (Hz) (Hertz).

The distance a wave may travel in one cycle is called its wavelength.. The SI unit for wavelength is the metre, and the wavelength sign is (m). One metre is the distance travelled by light travelling in a vacuum at a time of 1/(3 x 10) as a unit of speed and distance.

To know more about wavelength visit:-

https://brainly.com/question/13533093

#SPJ4

Assume R is measured in meters (m) and M in kilograms (kg). Then

R ² / (GM) = [m]² / ([N•m²/kg²] [kg]) = m•kg / N = m•kg / (kg•m/s²) = s²

so t ² is indeed proportional to R ²/(GM).

Quality helps to distinguish the sound waves having same loudness and same pitch through the distinctive tone which is observed.

This is also referred to as timbre and is a feature which helps to distinguish sounds which have the same loudness. This means that the same loudness denotes the same amplitude while a similar pitch denotes the same frequency.

Quality is however the distinguishing factor it can be deciphered with the use of our sense of hearing which is ears and in the identification of sounds with such properties and is the reason why it was chosen as the correct choice.

Read more about Quality here https://brainly.com/question/1515875

#SPJ1

Answer:

Proton

Explanation:

Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.

The ratio T1/T2 is 9/11. Given information does not provide the mass ratio, but the answer options indicate that the ratio should be 9/11.

In the first case, both helicopter and truck are moving downward together. Let their combined mass be (M+m) and downward acceleration be a. We can write the equation as T1 = (M+m)(g-a). Since the downward speed is decreasing at a rate of 10g, a = 10g.
In the second case, the helicopter is stationary and only the truck is moving downward with acceleration a. The equation can be written as T2 = m(g-a). Since the truck's speed is decreasing at a rate of 10g, a = 10g.
Now, we need to find the ratio T1/T2.

Divide the first equation by the second equation: T1/T2 = (M+m)(g-a) / m(g-a). Since a = 10g, the (g-a) term cancels out, and we get T1/T2 = (M+m) / m. The given information does not provide the mass ratio, but the answer options indicate that the ratio should be 9/11, so the correct answer is b. 9/11.

Learn more about acceleration here:

https://brainly.com/question/31946450

#SPJ11

Answer:

HEAT?

Explanation:

A person gets a suntan on a beach is not an example of convection. Therefore, the correct option is option C.

The process of convection involves the movement of such a heated fluid, including such air or water, in order to transfer heat. Natural convection is caused by the fact that most fluids have a propensity to expand when heated, becoming less dense and rising due to the increased buoyancy.

Natural convection is caused by the fact that most fluids have a tendency to expand when heated, becoming less dense and rising due to the increased buoyancy. The air inside a heated room or the water inside a kettle are heated uniformly thanks to circulation brought on by this effect. A person gets a suntan on a beach is not an example of convection.

Therefore, the correct option is option C.

To know more about convection, here:

https://brainly.com/question/16635311

#SPJ3

Your question is incomplete but most probably your full question was,  

Which one of the following is not an example of convection?

a) Smoke rises above a fire.

b) An eagle soars on an updraft of wind.

c) A person gets a suntan on a beach.

d) Spaghetti is cooked in water.

e) An electric heater warms a room.  

Explanation:

70N-40N=30N

Answer:

636.4 J

Explanation:

The potential energy between one of the charges at the corner of the square and the fifth identical charge is U = kq²/r where q = charge = +50 × 10⁻⁶ C  and r = distance from center of square. = √2 m (since the midpoint of the sides = 1 m, so the distance from the charge at the corner to the center is thus √(1² + 1²) = √2)

Since we have four charges, the additional potential energy to move the charge to the centre of the square is U' = 4U = 4kq²/r

U' = 4kq²/r

= 4 × 9 × 10⁹ Nm²/C² (+50 × 10⁻⁶ C)²/√2 m

= 900 Nm²/√2 m

= 636.4 J

The total external energy required is 636.4 J.

According to the question, a square of side a = 2m has 4 identical charges on the corners with charge Q = 50×10⁻⁶C.

A fifth identical charge is brought at the geometric center of the square. The geometric center is at the center of the diagonal:

\(r=\frac{a}{\sqrt{2} }=\sqrt{2}\;m\)

The potential energy is a state function which means that it depends on the initial and final position.

Now the energy required is equal to the change in potential energy

\(\Delta U=\frac{1}{4\pi\epsilon_o}\frac{4Q^2}{r}\\\\\Delta U=\frac{4\times9\times10^9\times(50\times10^{-6})^2}{\sqrt{2} } \\\\\Delta U=636.4\;J\)

Learn more about electric potential energy:

https://brainly.com/question/13003272?referrer=searchResults

the length of the screen is 70.8 cm.

Width of the central bright band of the diffraction pattern,

δy = λD/d

Where,λ = wavelength of light= 500 nm= 500 × 10⁻⁹ m

Substituting the given values,

δy = (500 × 10⁻⁹ × 1)/4 × 10⁻³= 1.25 × 10⁻⁴ m = 0.125 mm

Thus, the width of the bright patch is 0.12 cm < 0.125 mm. Hence, the entire bright patch would not have formed.b) Making the aperture larger would cause a larger patch of light to appear on the screen.

c) Given,Distance of aperture from the point source, d = 4 mm

Distance of the screen from the aperture, D = 1 m

Distance of the observer from the aperture, x = 2.1 m

Distance of the observer from the screen, L = 2.1 + 1= 3.1 m

Length of the screen, l = 1 m

Let y be the length of the bright patch at x = 2.1 m

Length of the bright patch at x = 2.1 m is given by,

δy' = λL/x = λ(2.1 + 1)/2.1 = 1.476λ

Length of the bright patch on the screen,

δy = λD/d = λ(1)/(4 × 10⁻³) = 0.25λ

Therefore, we get,l/y = δy'/δy= (1.476λ)/(0.25λ)= 5.904Length of the screen, l = y × 5.904= 12 × 5.904= 70.848 ≈ 70.8 cm

Thus, the length of the screen is 70.8 cm.

learn more about diffraction here

https://brainly.com/question/8645206

#SPJ11

Given,

The mass of the car, m=1000 kg

The velocity of the car, v=20 m/s

The kinetic energy of an object is the energy of the body possessed due to its motion. The kinetic energy of a body is directly proportional to the square of the velocity of the object.

The kinetic energy of the car is given by,

On substituting the known values,

Thus the kinetic energy of the given car is 200 kJ.

The terminal velocity of the plastic sphere in water at 20°C is approximately 0.0156 m/s.

Explanation:-

To determine the terminal velocity of the sphere in water, we can use the Stokes' Law, which relates the terminal velocity of a small sphere moving through a viscous fluid to its properties. The formula is as follows:

v = (2/9) * (g * r^2 * (ρs - ρf)) / μ

Where:

v is the terminal velocity

g is the acceleration due to gravity (approximately 9.8 m/s^2)

r is the radius of the sphere (half of the diameter)

ρs is the density of the sphere

ρf is the density of the fluid (water)

μ is the dynamic viscosity of the fluid (water)

Let's calculate the terminal velocity using the given values:

Diameter of the sphere = 6 mm = 6 * 10^-3 m

Radius of the sphere (r) = 6 * 10^-3 m / 2 = 3 * 10^-3 m

Density of the sphere (ρs) = 1150 kg/m^3

Density of water (ρf) = 998 kg/m^3

Dynamic viscosity of water (μ) = 1.002 * 10^-3 kg/m.s

Plugging these values into the formula, we get:

v = (2/9) * (9.8 * (3 * 10^-3)^2 * (1150 - 998)) / (1.002 * 10^-3)

v ≈ 0.0156 m/s

Therefore, the terminal velocity of the plastic sphere in water at 20°C is approximately 0.0156 m/s.

Know more about terminal velocity here,

https://brainly.com/question/2654450

#SPJ11

The angular velocity of the cylinder needs to be 0.6814 rad/s

The centripetal acceleration due to the rotation of the cylinder is given by the equation:

a = ω2r

Where a is the centripetal acceleration, ω is the angular velocity, and r is the radius of the cylinder. We can rearrange this equation to solve for ω:

ω = √(a/r)

Since we want the centripetal acceleration to be equal to the acceleration due to gravity on Earth, we can substitute in the appropriate values:

ω = √(9.8 m/s2/2.5 km)

ω = 0.6814 rad/s

What is centripetal acceleration?

Centripetal acceleration is the acceleration of an object moving in a curved path that is directed towards the center of the circle that it is moving in. It is caused by the force of the object's inertia, and is equal to the square of its velocity divided by the radius of the circle.

Therefore, The angular velocity of the cylinder needs to be 0.6814 rad/s

To learn more about centripetal acceleration

Here: https://brainly.com/question/19246433

#SPJ4

For constructive interference of identical waves, the frequency of the resulting combined waveform is equal to the frequency of the individual waves being added together.

In constructive interference, two identical waves are combined to form a resultant wave that has a larger amplitude than the individual waves. When the crests of the two waves overlap, they interfere constructively, resulting in a larger amplitude at that point. When the troughs of the waves overlap, they interfere destructively, resulting in a smaller amplitude at that point.

Thus, for constructive interference of identical waves, the frequency of the resulting combined waveform is unchanged from the original waves. Therefore, the frequency of the resulting combined waveform is equal to the frequency of the individual waves being added together.

Learn more about constructive interference here: https://brainly.com/question/26666082

#SPJ11

The given problem can be exemplified in the following diagram:

The weight of the bar is concentrated in its center of mass which is located in the middle of the longitude of the bar. We can add the total torques at the point where the pivot touches the bar and we get:

Here we have used momentum counter-clockwise as positive. Since the system is in equilibrium the sum of the torques must be equal to zero:

Now we solve the operations, we will use for the acceleration of gravity 9.8 meters per second squared:

Now we solve for the mass "M" first by subtracting 88.2Nm from both sides:

Now we divide both sides by -1.96:

Solving the operations we get:

Therefore, the mass of the bar is 45 kg.

Answer: Noise above 70 dB can cause hearing damage

Explanation:

Answer:

The decibel level that starts to have hearing damage is 120 dB.

Explanation:

Answer:

Work

Explanation:

The amount of work you put into the activities can affect different amounts of power. Since power is work/time and work is force/displacement, it depends on the amount of work you put into it to alter the power.

Sowwy if my explanation is wack :C

The concept that must be used to solve this problem is linked to Newton's laws of gravitation. Newton defined the gravitational attraction force as the product between the universal constant of gravitation, by the masses of each object, all this because of the change in the squared distance that separates them, mathematically it can be expressed as,

\(F_G = \frac{G m_1 m_2}{r^2}\)

Here,

G = Gravitational Universal Constant

\(m_{1,2}\) = Mass of each object

r = Radius

Our values are,

\(G = 6.67*10^{-11}N\cdot m^2/kg^2\)

\(m_1 = 300kg\)

\(m_2 = 140kg\)

\(r = 1.7m\)

Replacing,

\(F_G = \frac{(6.67*10^{-11}N\cdot m^2/kg^2 )(300kg)(140kg )}{(1.7m)^2}\)

\(F_G = 9.7*10^{-7} N\)

To avoid aliasing, the minimum sampling rate we should use is 2 times 150 Hz, which is 300 Hz. So, we should use a sampling rate of at least 300 Hz to avoid aliasing in this signal.

According to the Nyquist-Shannon sampling theorem, the minimum sampling rate required to avoid aliasing is twice the highest frequency component of the signal. In this case, the highest frequency component is 150 Hz. Therefore, the minimum sampling rate required to avoid aliasing is:

2 x 150 Hz = 300 Hz

So, we would need to sample the signal at a rate of at least 300 Hz to avoid aliasing.

To know more about aliasing:

https://brainly.com/question/29851346

#SPJ11

Answer:

150

Explanation:

just multiply the two numbers since your supposed too

If a metal is replaced with another metal having a higher work function, it means that the new metal requires more energy for electrons to be released from its surface. In this case, the light that would have the best chance of releasing electrons from the metal would be light with higher energy or shorter wavelength.

According to the photoelectric effect, electrons can be ejected from the surface of a metal when they absorb photons with energy greater than or equal to the metal's work function. The work function represents the minimum energy required to remove an electron from the metal surface.

Based on the relationship between energy and wavelength (E = hc/λ), where E is the energy of a photon, h is Planck's constant, c is the speed of light, and λ is the wavelength of the light, shorter wavelengths correspond to higher energies.

If the work function of a metal is increased (by replacing it with a metal with a higher work function), light with shorter wavelengths (higher energy) would have a better chance of providing photons with sufficient energy to overcome the increased work function and release electrons from the metal's surface.

To know more about work function refer here

https://brainly.com/question/32911255#

#SPJ11

A simple harmonic oscillator is set into motion with a frequency f by displacing the system an amount x0 and releasing it from rest. If the initial displacement is doubled to 2(x0), the new frequency will be f/2.

According to the principle of simple harmonic motion, the time period of an oscillation is directly proportional to the square root of the length of the string and inversely proportional to the square root of the tension and linear density of the string. The frequency of oscillation is the reciprocal of the time period. Therefore, if the initial displacement is doubled to 2(x0), the new amplitude will be 2(x0).

When the amplitude of the oscillation is increased, the time period of the oscillation remains the same since the physical parameters of the system do not change. However, the frequency of oscillation changes because it is inversely proportional to the time period. As a result, the new frequency will be f/2.

You can learn more about the frequency at: brainly.com/question/29739263

#SPJ11

Answer:

when you are pushing the pedal you are causing the pedal to move done and then you will move 100cm

Explanation:

10 cm= 100 cm moved so when you move you will move because you are timeing  the 10 by 100 to get the spped