The two regions of the electromagnetic spectrum where the Earth's atmosphere is transparent (radiation can get in) are visible light and: Group of answer choices

Answer:

Yes

Explanation:

\(v = \frac{ds}{dt} \\ where \: we \: need \: to \: know \\ \: change \: in \: displacement \\ \: and \: the \: time \: taken\)

if you know the time it took an object to travel between two points and the position of the object at the points, then we can determine the object's instantaneous velocity by using the differential rate of the displacement function with respect to the time.

Instantaneous velocity =  \(\frac{dS}{dt}\)

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.

velocity= displacement  / time taken

for instantaneous velocity =  \(\frac{dS}{dt}\)

Thus, If you know how long it took an item to go between two places and where it was when it got there, you can use the differential rate of the displacement function with respect to time to calculate the object's instantaneous velocity.

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Answer:

In these reactions the products are higher in energy than the reactants. ... This barrier is due to the fact that to make CO2 and H2O we have to break 4 carbon-hydrogen bonds and some ...

Explanation:

Mass of the snow falls vertically and lands on the moving slide the speed of the slide will decrease due to friction.

It is mentioned that the friction along the icy horizontal surface and the sled is knowledgeable then it means that we cannot ignore the friction. So, when the mass of snow falls vertically from the tree on the sled when the sled passes underneath the tree it cannot be considered a elastic collision.

The kinetic energy of the system will be changed and the linear momentum will not remain constant because of the friction. It will be an inelastic collision and because the mass of the body is increasing, so, the speed of the slide will decrease when the mass of the snow will fall on the sled.

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A controlled intersection is one that contains signals or signs to designate the right of way.

An electrostatic or electric current known as a signal is used to transfer information from one device or networks to another. Although it can sometimes take other dimensions, such as current, a signal in electronics frequently consists of a time-varying temperature that is also a electromagnet carrying information.

They can be deterministic or random, deterministic or agnostic, continuous or continuous time, both analog and digital, periodic or nonstationary, finite or infinite. They can also be separated into groups based on the causality and symmetry of those groups. An optimum impulse signal is one that is 0 everywhere else but infinitely high at the origin.

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By constructively superimposing two opposing waves, we get a standing wave amplitude that is much larger than the oscillation amplitude.

A wave is a disturbance of a medium consisting of the net motionless force of debris. It can take the form of elastic deformation, pressure deformation, electrical or magnetic intensity, electrical energy, or temperature.

Waves, propagation of disturbances from nearby to area in a normal and prepared manner. Sound, light, and the motion of subatomic particles all exhibit wave-like properties, although the best known are surface waves that travel on water. A wave is a continuous and repetitive perturbation of a medium and a pulse is a single perturbation.

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According to the given statement the number x is 2. The number x represents the dimensions of the term p * a in the given equation.

By comparing the dimensions of both sides of the equation, we find that x is equal to 2.

The equation given is:

Volume per second = k * (p * a) / n

Where:
- k is a constant
- p is the excess pressure (force per unit area)
- a is the radius of the pipe
- n is the frictional quantity of dimension MLT⁻¹


To find the number x, we need to determine the dimensions of each term in the equation.

1. Dimension of Volume per second:

  - Volume has the dimension L³ (length cubed)
  - Time has the dimension T (time)
  - Therefore, Volume per second has the dimension L³  / T

2. Dimension of k:

  - The equation states that k is a constant. Constants are dimensionless.

3. Dimension of p * a:

  - Pressure has the dimension M / (L * T² ) (mass divided by length and time squared)
  - Radius has the dimension L (length)
  - Multiplying pressure by radius results in the dimension M / (L * T² ) * L = M / (L²  * T² )

4. Dimension of n:

  - Given in the question, n has the dimension MLT⁻¹
(mass times length times time to the power of -1)

Now, we can equate the dimensions:

L³  / T = k * (M / (L²  * T² )) * MLT⁻¹


Simplifying the dimensions:

L³  / T = k * M / (L²  * T² ) * MLT⁻¹


L³  / T = k * M / L²  * M / T²  * L^-1 * T⁻¹


L³  / T = k * M²  / L²  * T⁻¹


To equate the dimensions, both sides of the equation must have the same dimensions. Therefore:

L³ / T = k * M² / L² * T⁻¹


Comparing the dimensions on both sides, we can conclude:

L³ / T = k * M² / L²* T⁻¹

The dimensions on the left side are L^3 / T, and the dimensions on the right side are (k * M²) / (L² * T).

Therefore, the number x is 2.

The number x represents the dimensions of the term p * a in the given equation.

By comparing the dimensions of both sides of the equation, we find that x is equal to 2.

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Answer:

30 m

Explanation:

Potential energy = kinetic energy + rotational energy

PE = KE + RE

mgh = ½ mv² + ½ Iω²

For a disk, I = ½ mr².  For rolling without slipping, ω = v/r.

mgh = ½ mv² + ½ (½ mr²) (v/r)²

mgh = ½ mv² + ¼ m v²

mgh = ¾ m v²

gh = ¾ v²

h = 3v² / (4g)

h = 3 (20 m/s)² / (4 × 10 m/s²)

h = 30 m

a)

The distance travelled in the first 3 seconds is 6 meters.

b.)

the total distance travelled is 13 meters.

c.)

the acceleration in the time interval from 4 seconds to 7 seconds is 0.67 m/s^2.

distance = speed × time

distance = 2 m/s × 3 s = 6 meters

b)

The distance travelled in the first 3 seconds=  6 meters.

The distance travelled from 3 seconds to 7 seconds, which can be found by finding the area under the trapezium formed by the line joining (3, 2) and (7, 4), the x-axis and the vertical lines at x=3 and x=7.

The height of the trapezium is (4 - 2) m/s = 2 m/s, and the two bases are 4 s - 3 s = 1 s and 7 s - 3 s = 4 s, respectively.

the area of the trapezium is:

area = (1/2) × (1 + 4) s × 2 m/s = 7 meters

The total distance travelled is therefore:

total distance = distance travelled in the first 3 seconds + distance travelled from 3 seconds to 7 seconds

total distance = 6 meters + 7 meters = 13 meters

c)

change in speed = final speed - initial speed

At t=4 s, t speed is 2 m/s,

and at t=7 s,  speed is 4 m/s.

change in speed = 4 m/s - 2 m/s = 2 m/s

The time interval is:

time interval = 7 s - 4 s = 3 s

acceleration = change in speed / time interval

acceleration = 2 m/s / 3 s = 0.67 m/s^2

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The test instrument that can be used to evaluate insulation resistance by measuring leakage current is called a megohmmeter.

Insulation resistance testing is performed to assess the integrity and effectiveness of insulation in electrical systems, equipment, and cables. The test measures the resistance of insulation materials, typically expressed in megohms (MΩ), to determine their ability to prevent leakage current from flowing through the insulation.

Insulation resistance testers apply a high DC voltage to the component or system under test and measure the resulting leakage current. By applying a voltage, the tester assesses how well the insulation is able to withstand current leakage. If the insulation resistance is high, it indicates good insulation quality, while a low insulation resistance suggests potential insulation degradation or faults.

Insulation resistance testers often provide various test voltage ranges and measurement capabilities to suit different applications and requirements. They typically display the measured insulation resistance value and may also indicate pass/fail criteria based on predefined thresholds or standards.

It's important to note that insulation resistance testing should be performed following appropriate safety precautions and guidelines to ensure the safety of the operator and the equipment being tested.

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Answer: Energy is conserved.

Explanation: Energy stored in spring = Potential energy gained by object at maximum height

Answer:

current must flow and chemical energy must take place

Answer: gravitational and buoyant force

Answer: The force produced by piston B is 0.006 N.

Explanation:

No problem! We can convert the area of piston B to square meters to make the units consistent:

Area of piston B = 0.1 cm^2 = 0.1 x (0.01 m/cm)^2 = 0.00001 m^2

Now we can use the formula:

pressure = force/area

For piston A, we have:

pressure = 6 N / 0.01 m^2 = 600 Pa

So the pressure in the liquid is 600 Pa.

To find the force produced by piston B, we rearrange the formula:

force = pressure x area

Using the pressure we just found and the area of piston B, we get:

force = 600 Pa x 0.00001 m^2 = 0.006 N

So the force produced by piston B is 0.006 N.

The outside diameter or side dimension of the vibrating element must be at least 19 mm but not greater than 38 mm is true. A vibration sensor is a system that is used to identify the condition of machinery and prevent it from being harmed. It keeps track of vibrations in the machinery and sends an alert if it exceeds a set threshold.

A sensor that detects vibrations in the environment or within a physical structure is known as a vibration sensor. Vibration sensors are commonly utilized in the maintenance of rotating equipment like pumps, motors, and other machinery to predict failure before it happens.

Based on the vibration being observed, these sensors may detect a range of defects, from unbalance and misalignment to bearing wear and looseness.

The outside diameter or side dimension of the vibrating element must be at least 19 mm but not greater than 38 mm. Hence, the given statement is true. This size range is important for the sensor to be able to pick up on the machinery's small vibrations and changes.

Anything smaller than 19 mm will not detect vibrations with the same precision, and anything larger than 38 mm will be more difficult to install in tight locations.

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Answer:

A coil having 45 loops

Explanation:

The strength of an electromagnet is proportional to the number of loops. So, when we have more loops, we will get mor strength. It means that the coil that will produce a magnetic field with the maximum strenght is a coil having 45 loops because 45 is the greatest number in the list.

Answer:

The distance in front of the target is 9.524 km

Explanation:

Given;

height of the bomber above the ground, h = 9 km = 9000 m

velocity of the bomber, v = 800 km/h = 222.22 m/s

The time the bomb will get to the target is given by;

\(t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2*9000}{9.8} }\\\\ t = 42.857 \ s\)

The lead distance or distance in front of the target is given by;

x = vt

x = (222.22 m/s) x (42.857 s)

x = 9523.68 m

x = 9.524 km

Therefore, the distance in front of the target is 9.524 km

In front of the target, the distance will be "9.524 km".

According to the question,

Bomber's height, h = 9 km or,

                                = 9000 m

Bomber's velocity, v = 800 km/h or,

                                  = 222.22 m/s

Now,

The time will be:

→ t = \(\sqrt{\frac{2h}{g} }\)

By substituting the values, we get

     = \(\sqrt{\frac{2\times 9000}{9.8} }\)

     = \(\sqrt{\frac{18000}{9.8} }\)

     = 42.857 s

hence,

The lead distance will be:

→ x = vt

By putting the values,

     = 222.22 × 42.857

     = 9523.68 or,

     = 9.524 km

Thus the above answer is correct.

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Answer:

Explanation:

Do you mean the theory that space-time is defined by what's in it? And that mass warps space-time?

There are many instances where his observation turned out to be correct. The most popular one is the phenomena of gravitational lensing. We can see the light from stars that are actually behind the sun. The huge gravity of the sun bends space-time and this also bends light. We use gravitational lensing alllll the time when trying to see very distant stars or galaxies.

Answer:

The Sun bent the light from a star. This bending made the star appear in a slightly different position from its actual position. This observation supported Einstein’s theory.

Explanation:

This is the answer on Edmentum! :)

Answer:

\(0.741\ \text{m/s}^2\)

Explanation:

v = Velocidad final = \(40\ \text{km/h}=\dfrac{40}{3.6}\ \text{m/s}\)

u = Velocidad inicial = 0

t = Tiempo empleado = 15 s

a = Aceleración

De las ecuaciones cinemáticas tenemos

\(v=u+at\\\Rightarrow a=\dfrac{v-u}{t}\\\Rightarrow a=\dfrac{\dfrac{40}{3.6}-0}{15}\\\Rightarrow a=0.741\ \text{m/s}^2\)

La aceleración del camión en el primer intervalo de tiempo es \(0.741\ \text{m/s}^2\).

We are given:_______________________________________________

Initial velocity (u) = 0 m/s

acceleration (a) = 0.8 m/s²

time interval (t) = 8 seconds

final velocity (v) = v m/s

distance travelled (s) = s m

Solving for the final velocity:___________________________________

We know that:

v = u + at                                [first equation of motion]

v = 0 + (0.8)(8)                       [replacing the variables]

v = 6.4 m/s

Hence, the final velocity is 6.4 m/s

Solving for the distance travelled:_______________________________

We know that:

s = ut + 1/2(at²)                     [second equation of motion]

s = (0)(8) + 1/2(0.8)(8)(8)      [replacing the variables]

s = 1/2(6.4*8)

s = 25.6 m

Hence, the distance travelled is 25.6 m

Answer:

Burrowing animals can cause weathering. By digging for food or making space to live in the animal may break apart rock. The growing roots of a tree can also break apart rock.

The integral of 1/(1 + x²) is (1/2)ln|1 + x²| + C where C is the constant of integration.

Integration is a mathematical process of finding the antiderivative of a function. To integrate the given expression 1/(1 + x²), we will use the substitution method.

Let u = 1 + x², du/dx = 2x dx, then dx = du/2x and the integral becomes:

∫1/(1 + x²) dx = ∫1/u * (1/2x) du= (1/2)∫1/u du

The antiderivative of 1/u is ln|u| + C, where C is the constant of integration.

Therefore, the final solution of the integral is (1/2)ln|1 + x²| + C.

Let us work through the steps:

Step 1:Let u = 1 + x² and then differentiate both sides with respect to x to obtain du/dx. du/dx = 2x

Substitute 2x dx = du into the integral ∫1/(1 + x²) dx to get the integral in terms of u:∫1/u * (1/2x) du = (1/2) ∫1/u du

Step 2:Calculate the antiderivative of 1/u, which is ln|u|. Thus, the final solution is (1/2)ln|1 + x²| + C, where C is the constant of integration. The constant C will vary depending on the initial conditions of the problem.

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A firewalker can step quickly without harm on red-hot coals with bare feet due to a phenomenon called the Leidenfrost effect. When a liquid, like water, comes in contact with a hot surface, it vaporizes and creates a thin layer of steam. This steam layer acts as an insulator, preventing the liquid from coming into direct contact with the hot surface.

Similarly, when a person walks on hot coals, the moisture on their feet and the soles of their shoes create a layer of steam that protects their skin from the heat. Additionally, firewalking coals are not actually as hot as they appear. The coals are made of hardwoods that burn down to a layer of ash that insulates the remaining coals, keeping them at a lower temperature.

Finally, firewalking involves quick steps and minimal contact time with the coals, reducing the likelihood of injury. Despite these factors, firewalking can still be dangerous and should only be attempted under the guidance of experienced professionals.

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Answer:

xhxzguztyayrayhNzxlhhlिगजि

Answer:

i. + 22.5 m ii. 4.0 m

Explanation:

i. Image distance

Using the lens formula

1/u + 1/v = 1/f where f = focal length = + 18.0 m, u = object distance = distance of shark away from lens = + 90.0 m and v = image distance from lens = unknown

So, we find v

1/v = 1/f - 1/u

= 1/+18 - 1/+90

= (5 - 1)/90

= 4/90

v = 90/4

= + 22.5 m

So the image is real and formed 22.5 m away on the other side of the lens.

ii Length of Shark

Using the magnification formula, m = image height/object height = image distance/object distance. image height = 1.0 m where object height = length of shark.

m = image distance/object distance

= v/u

= +22.5/+90

= 0.25

0.25 = image height/object height

So,

object height = image height/0.25

= 1.0 m/0.25

= 4.0 m

So, the length of the shark is 4.0 m

(a) The height from which he was fired is 4.13 m.

(b) The time spent in air by Zacchini is 3.63 seconds.

The time of motion of Zacchini is the time spent in air by Zacchini or the total time taken for Zacchini to fall from the given height to the ground level  and it can be calculated by applying the following kinematic equation.

X = Vₓt

where;

X = Vcosθ(t)

The given parameters;

t = X / Vcosθ

t = (56.6) / (18 x cos30)

t = 3.63 seconds

The height at which the cannon was fired is calculated as;

H = u²sin²θ/2g

H = (18² x (sin 30)² ) / (2 x 9.8)

H = 4.13 m

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Answer:

3.2 hours

Explanation:

96÷30=3.2

so it should take 3.2 hours

The maximum pressure the rectangular block can exert on a surface when placed on one of its faces on a horizontal surface is 317.71 Pa.

The maximum pressure the rectangular block can exert on a surface occurs when it is placed on one of its smallest faces.

To calculate the maximum pressure, we need to find the weight of the block, which is equal to its mass multiplied by the acceleration due to gravity. The mass of the block can be calculated as follows:

mass = density x volume

The volume of the block is:

volume = length x width x height

volume = 6.0 cm x 8.0 cm x 12.0 cm

volume = 576 cm³

Converting to meters:

volume = 0.006 m x 0.008 m x 0.12 m

volume = 5.76 x 10^-5 m³

Therefore, the mass of the block is:

mass = density x volume

mass = 2700 kg/m³ x 5.76 x 10^-5 m³

mass = 0.1555 kg

The weight of the block is:

weight = mass x acceleration due to gravity

weight = 0.1555 kg x 9.81 m/s²

weight = 1.526 N

When the block is placed on one of its smallest faces, the area of contact with the surface is:

area = length x width

area = 6.0 cm x 8.0 cm

area = 48 cm²

Converting to meters:

area = 0.06 m x 0.08 m

area = 0.0048 m²

Therefore, the maximum pressure the block can exert on the surface is:

pressure = weight / area

pressure = 1.526 N / 0.0048 m²

pressure = 317.71 Pa

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Answer:

\(\huge\boxed{\sf P = 2592\ Ns}\)

Explanation:

Mass = m = 162 kg

Velocity = v = 16 m/s

Momentum = P = ?

P = mv

Put the given data in the above formula.

P = (162)(16)

P = 2592 Ns

\(\rule[225]{225}{2}\)

The phenomenon in hearing that is analogous to spatial frequency channels in vision is critical bands. Hence, the correct option is A: Critical bands.

Critical bands are regions of the audible frequency range in which a complex sound is divided into individual, discrete frequency bands by the human auditory system.

For instance, when different frequencies in a complex sound, such as a musical instrument or a human voice, are picked up by the ear, they are sent to the brain via various channels that respond to specific frequencies.

These channels are referred to as critical bands. The frequency range of these bands varies depending on the loudness of the sound.

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