parallel light rays with a wavelength of 623 nm fall on a single slit. on a screen 3.30 m away, the distance between the first dark fringes on either side of the central maximum is 4.80 mm .

The slope of a cold front is steeper than that of a warm front.

A warm front and a cold front are two different fronts associated with a mid-latitude low-pressure system. A cross-sectional view of these fronts can be helpful in better understanding their characteristics and structure. Let's take a look at the horizontal cross-section of these fronts:

Image showing the Horizontal Cross section of a warm front and a cold front for a mid-latitude low pressure system:

The 150 isobar is shown in bold.

The vertical structure of a warm front:

In a mid-latitude low-pressure system, a warm front represents the leading edge of a warm, moist air mass as it approaches a region of cold, dry air. In general, the warm air moves toward the cold air in the form of a low-level wedge. The warm front is associated with a gradual decrease in temperature and pressure as one moves from the warm side to the cold side of the front. The steepness of the frontal slope is gradual. The slope is gradual because the warm air rises over the cool air.

The vertical structure of a cold front:

A cold front represents the leading edge of a cold, dry air mass as it advances toward a region of warm, moist air. It is usually associated with a line of clouds, precipitation, and thunderstorms. The frontal slope is steeper than that of a warm front, with a temperature drop of several degrees Celsius per kilometer of ascent. The cold air moves in a downward motion to the ground and forces the warm air up. This motion creates clouds, precipitation, and sometimes thunderstorms. Therefore, the slope of a cold front is steeper than that of a warm front.

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Answer:

See below

Explanation:

Vertical position = 45 +  20 sin (30) t  - 4.9 t^2

 when it hits ground this = 0

               0 = -4.9t^2 + 20 sin (30 ) t + 45

                0 = -4.9t^2 + 10 t +45 = 0     solve for t =4.22 sec

  max height is at  t= - b/2a = 10/9.8 =1.02

     use this value of 't' in the equation to calculate max height = 50.1 m

      it has  4.22 - 1.02 to free fall = 3.2 seconds free fall

           v = at = 9.81 * 3.2 = 31.39 m/s VERTICAL

      it will also still have horizontal velocity =  20 cos 30 = 17.32 m/s

        total velocity will be sqrt ( 31.39^2 + 17.32^2) = 35.85 m/s

Horizontal range = 20 cos 30  * t  =  20 *  cos 30  * 4.22 = 73.1 m

We can use the formula:

Energy (E) = Charge (Q) × Potential difference (V)

          V = E / Q = 20 J / 80 × 10^-3 C = 250 V

         I = Q / t = 80 × 10^-3 C / 5.0 × 10^-3 s = 16 A

          P = E / t = 20 J / 5.0 × 10^-3 s = 4,000 W

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To learn the equilibrium and temperature.

What is equilibrium?

When Newton's first law is true, the equilibrium state of an object is present. When all external forces (including moments) operating on an object in a reference coordinate system are equal, the object is said to be in equilibrium. The net effect of all external forces and moments acting on this object is zero as a result.

What is temperatue?

Temperature is a unit of measurement that can be expressed on a variety of scales, including Fahrenheit and Celsius. Temperature shows the direction of the spontaneous movement of heat energy, i.e., from a hotter body (one with a higher temperature) to a colder body (one with a lower temperature).

Their temperatures must be equal if two bodies are in thermal equilibrium.

As for coldness or warmth, we generally observe that metals feel colder while non metallic objects don't (i.e. comparatively they feel warmer than metals). This is due to the fact that metals are good conductor of heat. So when we touch a metallic body, heat flows from our body and is transferred to other points of the metal object. Since our body loses heat, we feel cold. In non metals, this conduction of heat from point of contact to other locations does not happen.

Therefore, the amount of heat loss from our body is much smaller. So we don't feel that cold.

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Answer:

If a bulb is rated at 60 W it uses 60 W (60 J/s) for its operation.

If only 18% of this power input provides useful light then the light produced each second is

P = .18 * 60 J / s = 10.8 J / sec

In one sec  W = P * t = 10.8 J/s * 1 sec = 10.8 joules

The number of protons plus the number of neutrons decreases

Beta decay occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other. In beta minus decay, a neutron decays into a proton, an electron, and an antineutrino: n Æ p + e - +.

Answer:

Reflective clothing. So vehicles can see them and stuff.

Answer:

Equilibrium or coordination

Explanation:

The body's equilibrium is it's way to maintain balance, and perfect distribution of weight. When no force is acting to make a body move in a line, the body is in translational equilibrium; when no force is acting to make the body turn, the body is in rotational equilibrium.

Answer: Control

Explanation:

I did it on FLVS Flex

20 lb of water requires 1,800 BTU of heat to increase its temperature from 32°F to 212°F.

To find the amount of heat required to increase the temperature of water from one temperature to another, we use the formula:
                                             Q = m x c x ΔT
Where Q is the heat required, m is the mass of water, c is the specific heat capacity of water, and ΔT is the temperature change.
In this case, the mass of water is 20 lb, the specific heat capacity of water is 0.5 BTU/lb/°F, and the temperature change is 212°F - 32°F = 180°F.

Plugging these values into the formula, we get:
Q = 20 lb x 0.5 BTU/lb/°F x 180°F = 1,800 BTU
Therefore, the amount of heat required to increase the temperature of 20 lb of water from 32°F to 212°F is 1,800 BTU.

The correct answer is A. 20 lb x 0.5 x 180°f = 1,800 BTU

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The Productivity Index (PI) of the well is 2 psi/bbl per day. This indicates the efficiency of the well in delivering fluids from the reservoir to the wellbore.

The Productivity Index (PI) is a measure of the well's ability to deliver fluids from the reservoir to the wellbore. It is calculated by dividing the difference between the reservoir pressure and the flowing bottomhole pressure by the production rate. In this case, the reservoir pressure is given as 3,000 psi, and the flowing bottomhole pressure is measured at 2,990 psi. The production rate is 5 barrels per day.

For calculating the PI, use the formula:

PI = (Reservoir Pressure - Flowing Bottomhole Pressure) / Production Rate

Substituting the given values into the formula:

PI = (3,000 psi - 2,990 psi) / 5 bbls per day

Simplifying the equation:

PI = 10 psi / 5 bbls per day

PI = 2 psi/bbl per day

Therefore, the Productivity Index (PI) of the well is 2 psi/bbl per day. This indicates the efficiency of the well in delivering fluids from the reservoir to the wellbore.

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Answer:

\(\huge\boxed{\sf F= 350 \ N}\)

Explanation:

Considering pivot as the central point,

Key:

\(F_1r_1=F_2r_2\)

Here,

Substitute the givens in the above formula.

\(F(1.2)=600(0.7)\\\\F(1.2)=420\\\\Divide \ 1.2 \ to \ both \ sides\\\\F=420/1.2\\\\F= 350 \ N\\\\\rule[225]{225}{2}\)

The Force on the astronaut is 262 N.

We can use Newton's law of gravitation to determine the force between the astronaut and the International Space Station (ISS). The force is given by:

\(F = G*(m1*m2)/r^2\)

where G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers of mass. In this case, the astronaut has a mass of 175 kg and is 25 m from the center of mass of the ISS, which has a mass of 370,000 kg. Substituting these values, we get:

\(F = G*(m1m2)/r^2 = 6.67*10^{-11} N(m^2/kg^2)(175 kg)(370000 kg)/(25 m)^2\)

Simplifying this expression, we get:

F = 262 N

Note that this force is directed towards the center of mass of the ISS.

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As n is not an integer, so there will be no constructive interference between the speakers, if speaker A is moved by minimum distance.

Interference is a phenomenon in which two waves combine by adding  displacement together at every single point in space and time and to form a resultant wave of greater, lower, or same amplitude.

Wavelength of a 500 Hz sound wave is the speed of sound (about 343 m/s) divided by the frequency of the sound, which is 343/500 m = 0.686 m. Therefore, minimum distance you can move speaker A to achieve constructive interference along x-axis is 0.686/2 m = 0.343 m.

Given, distance between the speakers is 6m. Constructive interference will occur when path difference between two waves is equal to integer multiple of the wavelength. To achieve constructive interference, distance between the speakers + the distance moved by speaker A should be equal to n*wavelength where n is integer.

So, 6 + 0.343 = n* 0.686

n = (6+0.343)/0.686 = 8.8

As n is not an integer, so there will be no constructive interference between the speakers, if speaker A is moved by minimum distance.

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The composition of the sun by mass of hydrogen drops, but the amount of helium grows because helium is heavier than hydrogen.

The percentage by mass of an element in a compound is the percentage the mass of that element contributes to the total mass of the substance.

The percentage by mass of an element depends on the mass of the element.

Heavier elements in equal amounts with less dense elements have a greater percentage mass.

Since the mass of the helium atom is greater than the mass of the hydrogen atom, the Sun's composition by mass of hydrogen drops while that of helium increases.

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Finally, the vapor pressure of substance b can be determined using Raoult's law: vapor pressure of b = mole fraction of b * vapor pressure of pure b.

However, we need additional information such as the vapor pressure of pure b to calculate the vapor pressure of b accurately.

To determine the vapor pressure of substance b when 400 g of substance a (with a molar mass of 80 g/mol) and 1700 g of substance b (with a molar mass of 85 g/mol) are mixed, we need to consider the mole fractions of the two substances.

First, let's calculate the number of moles for each substance.

For substance a:
moles of a = mass of a / molar mass of a
moles of a = 400 g / 80 g/mol
moles of a = 5 mol

For substance b:
moles of b = mass of b / molar mass of b
moles of b = 1700 g / 85 g/mol
moles of b = 20 mol

Next, we need to calculate the total number of moles in the mixture:
total moles = moles of a + moles of b
total moles = 5 mol + 20 mol
total moles = 25 mol

Now, let's calculate the mole fraction of substance b:
mole fraction of b = moles of b / total moles
mole fraction of b = 20 mol / 25 mol
mole fraction of b = 0.8

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Answer: An atom's emission of light with a specific amount of energy confirms that atoms must have a dense central mass surrounded by electrons at a distance

plz mark brainliest

Answer:

It's B, electrons emit and absorb energy based on their position around the nucleus.

The average distance between asteroids in the asteroid belt is 600,000 miles.

Johann Titius, an 18th-century German astronomer, noted a mathematical pattern in the layout of the planets and used it to predict the existence of one between Mars and Jupiter.

This finding including more like that of great Indian mathematician sir Ramanujan shows the importance of mathematics in the understanding of the universe.

Astronomers estimate that the average distance between two asteroids in the asteroid belt is about 600,000 miles (966,000 km). This is about 2.5 times the distance between the Earth and the Moon.

this is shockingly different to the general perception about the asteroid belt which is assumed to be closely packed.

Consequence of this result that the average distance is 600,000 miles away reduces the chance of collision of spaceship with the asteroid belt significantly.

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Answer:

She will be at 49m from her starting point in 7s

Explanation:

V = AT    2s V = 2*2 = 4m/s    7s V = = 2*7 = 14 m/s

D = 1/2AT^2  for 7 sec = 1/2*2 m/s^2 * 7s^2

    = 1/2*2*49

    = 49m

Here is a problem.

Problem:-

A car of mass 1700kg accelerated with a rate of 17m/s^2. find the force applied on it.

Extra:-

F=ma is. the famous formula of Sir Eizak Newton

The magnitude of the force on the electron in the electric field is 1.6 * \(10^{-12}\)N, directed in the opposite direction of the electric field intensity.

What is Electric Field?

Electric field is a physical quantity that describes the influence or effect that an electric charge exerts on other charges or objects in its vicinity. It is a vector quantity, meaning it has both magnitude and direction. The electric field is created by a charged object and extends radially outward or inward depending on the type of charge (positive or negative) and decreases with distance according to the inverse square law.

Electric field intensity (E) between the plates of a parallel plate capacitor is given by the formula:

E = V/d

Substituting the given values:

E = 5 * \(10^{4}\) V / 5 * \(10^{-3}\) m

E = 1 * \(10^{7}\)V/m

So, the magnitude of the electric field intensity between the plates of the parallel plate capacitor is 1 * \(10^{7}\) V/m.

The force (F) on an electron in an electric field is given by the formula:

F = q * E

Substituting the given values:

F = -1.6 * \(10^{-19\) C * 1 *\(10^{7}\) V/m

F = -1.6 *\(10^{-12}\) N

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Knowing about the inner planets helps to prove or disprove scientific theories made on earth. The exploration of inner planets gives the opportunity to learn about the processes that form and govern the evolution of planets and how earth's atmosphere might change in the future.

A planet can be defined as a large, round astronomical object that is neither a star nor its remnant. The theory used for the explanation of planet formation is known as the nebular hypothesis, which gives information that an interstellar cloud collapses out of a nebula to produce a young protostar orbited by a protoplanetary disk.

The planet grew in this disk through the accumulation of matter driven by gravity and this process called accretion. Our solar system has at least 8 planets that revolve around an axis tilted w.r.t. its orbital pole.

Therefore, knowing more about the inner planets help to learn more about the earth.

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We can solve this problem using the conservation of energy principle, which states that the total mechanical energy (potential energy + kinetic energy) of a system remains constant if no external work is done on the system.

At the top of the hill, the car has only potential energy, given by:

PE = mgh

where m is the mass of the car, g is the acceleration due to gravity, and h is the height of the hill.

PE = (1000 kg) x (9.81 m/s^2) x (200 m) = 1,962,000 J

At the base of the hill, the car has only kinetic energy, given by:

KE = (1/2)mv^2

where v is the velocity of the car.

Using the conservation of energy principle, we can equate the potential energy at the top of the hill to the kinetic energy at the base of the hill:

PE = KE

mgh = (1/2)mv^2

Canceling the mass on both sides, we get:

gh = (1/2)v^2

Solving for v, we get:

v = sqrt(2gh)

Substituting the given values, we get:

v = sqrt(2 x 9.81 m/s^2 x 200 m) = 44.3 m/s

Therefore, the velocity of the car at the base of the hill is approximately 44.3 m/s.

Answer:

the percentage we have the fraction between the error and the magnitude,

Explanation:

When absolute error is used, it is a value that remains constant regardless of the magnitude of the measurement, for large measurements it can represent great accuracy, but for small measurements the accuracy may be low, for example> if we use a tape measure with error of Dx = 0.1 cm if the measurement is 1 meter this error is acceptable, but if the measurement is 1 cm the error is too big.

When we use the percentage we have the fraction between the error and the magnitude, so if this relationship is small the measure is very tight and but if the relationship is high the measure has little pressure, for example

           Δx = 1 cm = 0.01 m

          % = 0.01 / 1   100 = 1%

          % = 0.01 / 0.01 100 = 100%

therefore the precision of the measurement is known the percentage error

Answer:

it’s an example of a generator.

Explanation:

Answer:

Generator

Explanation:

valid

Energy is conserved by energy being transformed through one form or different forms.

Energy can change from one form to another, but cannot be destroyed.

Energy cannot be created or destroyed.

Similar to this, according to the rule of conservation of energy, energy cannot be generated or destroyed. For instance, kinetic energy is converted to potential energy when a toy vehicle is rolled down a ramp and collides with a wall.

There are three fundamental quantities in mechanics that are preserved. They are power, forward motion, and angular momentum. It can come as a surprise to you that energy is a conserved quantity if you've read instances in prior pages, such the kinetic energy of charging elephants.

Solar heat energy from the sun is used by us.

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The work required to carry an electron from the positive terminal to the negative terminal of a 9.0-v battery is -1.44 × 10⁻¹⁸ J.

To determine how much work is required to carry an electron from the positive terminal to the negative terminal of a 9.0 V battery, we need to use the formula:

Work = charge × potential difference

When we move an electron from the negative terminal to the positive terminal, it gains potential energy, so it takes work to move the electron from the positive terminal to the negative terminal of the battery.

As we know that an electron has a charge of -1.6 × 10⁻¹⁹ C and the potential difference across the battery is 9.0 V. So, the work required to move an electron from the positive terminal to the negative terminal of a 9.0 V battery will be:

W = qVW

= -1.6 × 10⁻¹⁹ C × 9.0 V= -1.44 × 10⁻¹⁸ J.

Therefore, the work required to carry an electron from the positive terminal to the negative terminal of a 9.0-v battery is -1.44 × 10⁻¹⁸ J.

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Answer:

plants because of photosynthesis humans because of food and the energy causing cells in it and batteries or solar panels because of the sun.

Explanation: