What happens to waves when they pass through a narrow opening?

Answer:

2.15ml

Explanation:

The formula for density is    D = m/v

Since we already have density and mass, we need to rearrange the equation to find the volume.

The rearranged formula is     V = m/D

V = 28g/13g/ml

The volume is 2.15ml

An electric field is an electric property associated with each point in space when charge is present in any form. The diagrams are attached

The force per unit charge exerted on a positive test charge that is at rest at a given point is the force per unit charge that is used to define the electric field mathematically. Electric charge or magnetic fields with varying amplitudes can produce an electric field.

When charge is present in any form, a point in space has an electric field that is connected to it. The value of E, also known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field.

A self-propagating electromagnetic wave like light also requires an understanding of the electric field concept. We now have a way to explain how starlight travels across vast stretches of empty space to reach our eyes thanks to the electric field concept.

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The resistance provided to moving objects by the surface they are sliding or moving on is measured as sliding friction or dynamic friction. Sliding friction starts to work as soon as even the object begins to move.

What do static and dynamic friction mean?

When two bodies are in touch with one another and at rest, they experience static friction. Friction is what keeps anything from flowing while it is motionless. Dynamic friction, also known as kinetic friction, is friction that prevents a body from moving while it is already moving.

What kinds of dynamic friction are there?

There are two forms of dynamic friction: Sliding Resistance Friction as it rolls.

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No, when powered vessel is underway, the passengers can not sit with their legs hanging over the side.

Power boats are also known as motor or speed boats. As evident by their name, they are powered by the engine. The position of engine however varies in boats. It can be fit inside, outside or it can be hybrid. The latter case involved presence of parts of engine both inside and outside.

The postion of motor decides the seating position. While riding the boat, it is mandatory to follow certain rules and regulations as they benefit the passengers and not the boat company or boat renter. Safety first should always be the rule regardless of the passenger being tourist or local resident.

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Answer: 270

Explanation:

To determine how many seconds it would take for a probe to reach that speed starting from rest and accelerating at a rate of 29 m/s^2, you can use the equation for average acceleration:

Average acceleration = (final velocity - initial velocity) / time

Rearranging the terms, we can solve for time:

Time = (final velocity - initial velocity) / average acceleration

In this case, the initial velocity is 0 m/s (since the probe is launching from rest), the final velocity is 7,850 m/s (the speed required to reach orbit), and the average acceleration is 29 m/s^2. Plugging these values into the equation, we get:

Time = (7850 m/s - 0 m/s) / 29 m/s^2 = 270.34 seconds

Therefore, it would take the probe approximately 270 seconds to reach the speed required to get into orbit if it is accelerating at a rate of 29 m/s^2.

Answer:

16.75 m/s North

Explanation:

Calculate a weighted average;  North is the positive direction

(32 m/s).75 - (29 m/s).25 = 16.75 m/s N

Light is diffracted into semicircular waves when it travels through small apertures, Waves that line up crest to crest or trough to trough experience pure constructive interference.

On a faraway screen, one can see the light traveling through the two openings. The laws of geometrical optics apply, and the light forms two shadows when the widths of the slits are much bigger than the wavelength of the light.

The wave effectively splits into two new waves that each expand out from one of the holes as it passes through both of them. Then, these two waves start to interfere with one another. Where a peak and a trough meet occasionally.

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The methanogens producers of methane gas, require environments that  

are anaerobic with hydrogen gas and C02. Option E

Methanogens are defined as microorganisms that produces methane as their by-product in oxygen-limited environments during metabolic processes.

Methanogens are produce methane following two pathways;

Some properties of methanogens include;

Hence, methanogens are anaerobic.

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Microwaves, Infrared, X-rays, and gamma rays are electromagnetic waves in decreasing frequency order that is from highest to lowest.

The relationship between frequency and wavelength is inversely proportional. That means if wavelength increases then frequency decreases.

The wavelengths of electromagnetic radiation, such as microwaves, typically range from one meter to one millimeter.

Longer wavelengths than visible light are found in infrared electromagnetic energy, also referred to as infrared light.

An X-ray is a sort of penetrating, high-energy electromagnetic radiation. X-radiations are far less common.

Gamma rays, commonly known as gamma radiation, are short, sharp electromagnetic radiation waves created by the radioactive disintegration of atomic nuclei.

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Submarines were located during World War I by listening for their engines or propellers. The sonar operator wore a straightforward two-earphone (air tube) equipment, and by mechanically turning the receiver, could detect the direction from whence the sound originated.

When did sonar enter World War 1?

To combat the rising threat of submarine warfare, it was developed during World War I, and by 1918, a functioning passive sonar system was in use.

Who made sonar in World War One?

In order to find icebergs, Lewis Nixon created the first Sonar-style listening apparatus in 1906. The requirement to be able to detect submarines during World War I led to an upsurge in interest in sonar.

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The conclusions that are correct about the resistance  include 1 and 3.

option C is the correct answer.

Ohms law states that the current flowing in ohmic conductor is directly proportional to the current across the conductor.

Mathematically, the formula for ohms law is given as;

V = IR

where;

The power dissipated in a circuit is proportional to the square across the circuit.

P = IV

P = I²R

P = V²/R

where;

From the formula given above, the power dissipated in the circuit is directly proportional to the square of voltage and inversely proportional to the resistance of the circuit.

The smaller the resistance, the more power is dissipated in the circuit.

In the given graph, R3 is the least resistance and it will have the most dissipated in the circuit.

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A single gene mutation, several gene mutations, a combination of gene mutations and environmental variables, or damage to chromosomes (changes in the number or structure of complete chromosomes) can all result in genetic illnesses.

Mutations may have an impact on an organism by altering its phenotype, or they may have an impact on the way DNA codes the genetic information (genotype). When mutations take place, they may be completely fatal or they may result in the termination (death) of an organism.

Genetic illnesses result from changes or anomalies in an organism's genome. A gene mutation can affect one or more genes, leading to a genetic illness.

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The product of wavelength and frequency is always the speed of the wave.For this particular wave is 18 meters per second .

Speed = (3 meters) x (6 per second)  =  18 meters per second .

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Dispersion of the diffracted image into the several colours that make up white lightJustification for the ideal selection

:The diffracted picture of the slit will become scattered into the individual hues of white light

when a monochromatic source is replaced by white light.

All other fringes will be the constituent colours, with white serving as the central maxima.

When light with a shorter wavelength is employed,

the width of the central brilliant fringe in the diffraction pattern shrinks

.(2) When the slit is made narrower, the width grows.

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The magnetic flux through the loop is 0.098 Wb.

Magnetic flux (often symbolized Φ), is the measure or amount of magnetic field B passing through a certain cross-sectional area, for example, a coil of wire (this is also often called "magnetic field density"). The unit for magnetic flux in International Units is the weber (Wb) (Weber is a derived unit from the volt-second).

Magnetic Flux Formula:

                                   ∅ = B A cos α

Where:

∅ = magnetic flux (Wb)

B = magnetic field (T)

A = cross-sectional area (m)

α = angle between B and the normal plane

On the given question:

B = 0.50 T

r = 0.25 m

α = 0° ⇒ because it is in a flat plane

A = πr²

Then substitute:

∅ = B A cos α

∅ = 0.50 x π (0.25)² x cos0°

∅ = 0.50 x 3.14 (0.0625) x 1

∅ = 0.098 Wb

So that the magnetic flux bear is 0.098 Wb

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Gravity The principal factor governing the planets' orbits around the sun is gravity. While each planet has its own gravity that is determined by its size and speed of motion, orbit is determined by the gravity of the sun.

If you were to stand on the surface of any planet in the solar system, or, in the case of the ice giants, float in its atmosphere, you would feel the following gravitational pull: Venus: 0.9 g Mercury: 0.38 g Moon: 0.17 g Mars: 0.38 g Saturn: 1.07 g Jupiter: 2.53 g 0.89 g Uranus Jupiter: 1.14 g The Planets' Gravitational Pull The two driving forces that propel the planets around the sun.

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The international space station orbits the earth at about 27,578 kilometers every hour this an example of Speed.

Speed  can be described as the rate of change of position of an object in any direction however the Speed  can be described as the  measured as the ratio of distance to the time in which the distance was covered.

It should be noted that Speed is a scalar quantity as it has only direction and no magnitude which makes it to be different from velocity.

Therefore, option A is correct.

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missing options:

Speed. Velocity. Acceleration.

The amount of tension in the rope by using Newton's laws if The mass suspended on ropes is 7 kg, is 68.6 Newtons.

A fundamental characteristic of an object, its inertia is quantified by its mass, which is a basic indicator of the volume of substance inside the thing. Because mass is such a fundamental quantity and is difficult to define in terms of another, definitions of it frequently appear circular.

It is possible to define every mechanical quantity in terms of mass, length, and time. The SI unit for mass, denoted by the letter m, is the kilogram.

Given:

The mass of the foot and boot, M = 4 kg,

The mass suspended by ropes, m = 7 kg,

Calculate the tension on the rope as shown below,

Tension on the ropes = m × a

Tension on the ropes = 7 × 9.8

Tension on the ropes = 68.6 N

Thus, the tension on the boot and foot is 68.6 N.

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Physically speaking, the ability of electrical fields to traverse a standard vacuum is represented by the permittivity of free space.

Vaccum permittivity:

Fc​=4πε0​1​×r2q1​q2​​

Where ε0​ is permttivity of vaccum.

Dimension will be [M−1L−3T4I2]

vaccum permeability:

μ0​=4π×10−7N/A2

Dimensions will be [MLT−2I−2]

Dimensions for μ0​ε0​1​ will be [M−1L−3T4I2]×[M1L1T−2I−2]1​=[L2T−2]

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Fear and greed have a major role in the discontinuity effect. Realistic group conflict theory includes a concept known as outgroup polarization. Realistic group conflict theory is one of the options from the set of replies.

A characteristic of transverse waves called polarization (sometimes called polarisation) identifies the geometrical orientation of the oscillations is called polarization. The oscillation in a transverse wave occurs in a direction that is opposite to the wave's velocity. Vibrations occurring along a taut string, such as the string of a guitar, provide a straightforward illustration of a polarised transverse wave. Vibrations may be at a vertical, horizontal, or any other angle perpendicular to the string, depending on how the string is plucked. In contrast, polarization does not exist in longitudinal waves, such as sound waves in a liquid or gas, because the displacement of the oscillating particles always occurs in the direction of the wave's propagation.

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Answer:

current

Explanation:

A parallel circuit is one in which there is more than one point where the current divides and follows different paths.

One kind of contact force is friction. It exists between surfaces that are in contact with one another.

Contact force: What is it?

Objects in interaction with each other exert a force on one another known as contact force. The point of immediate contact between two objects is where the contact force acts. This force may be brief in the form of such an impulse or it may be continual as a continuous force.

What, by way of example, is contact force?

A force which acts at the point where two objects come into touch is known as a contact force. Examples of contact stress include kicking a ball and pushing an car up a hill.

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The speed of the proton at point P is determined as 2.67 x 10⁶ m/s.

The speed of the proton at point P is determined by applying the principle of conservation of energy as shown below.

Total energy of the proton at the initial position = total energy of the proton at the final position

Ui + K.Ei = Uf + K.Ef

where;

U is potential energy

K.E is the kinetic energy

= kq₁q₂/r₁  +  ¹/₂mv₁² = kq₁q₂/r₂  +  ¹/₂mv₂²

= kq₁q₂/r₁  +  ¹/₂mv₁² - kq₁q₂/r₂ = ¹/₂mv₂²

= kq₁q₂(1/r₁  - 1/r₂)  + ¹/₂mv₁² = ¹/₂mv₂²

= ¹/₂mv₂²  = kq₁q₂ (1/r₁  - 1/r₂)  + ¹/₂mv₁²

= v₂² = 2/m [kq₁q₂ (1/r₁  - 1/r₂)  + ¹/₂mv₁² ]

where;

m is mass of the proton

k is coulomb's constant

q₁ is the magnitude of the charge

q₂ is charge of proton

r₁ is the initial position of the proton

r₂ is the final position of the proton = 5 mm (from Pythagoras theorem)

= v₂² = 2/(1.67 x 10⁻²⁷) [9 x 10⁹ x 10 x 10⁻⁹ x 1.6 x 10⁻¹⁹ (1/0.003  - 1/0.005)  + ¹/₂(1.67 x 10⁻²⁷)(2.2 x 10⁶)² ]

= v₂² = 7.14 x 10¹²

= v₂ = √ (1.44 x 10²³)

= v₂ = 2.67 x 10⁶ m/s

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The complete question is below:

a proton follows the path shown in (figure 1). its initial speed is v0 = 2.2×106 m/s. find the speed of the proton at point P?

The ball's potential energy is completely changed into its kinetic energy (E k), which is equal to 250 J, when it hits the ground.

If v is the speed the ball was traveling at when it hit the ground, then

E(k) = 1 /2 mv^2

V= √2Ek/m

V= √2*250/ 2

V= 15.81 m/s

potential energy, which is a form of stored energy that depends on the relative positions of different components in a system. When a spring is compressed or stretched, its potential energy increases. If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy.

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In addition to several other factors thought to affect self-monitoring reactivity, such as the valence of target behaviours, motivation to change the target behaviour, the type of target behaviour, and self-monitoring accuracy,

the current study looked at a new variable, the number of behaviours self-monitored or multiple tracking. Self-monitoring is the process through which people keep track of when their own target actions occur. Self-monitoring is employed as a therapeutic technique in addition to serving as a data source since it frequently results in reactive behaviour modifications in response frequency. Face touching, nonfluencies, and value judgements were the three target behaviours that were mixed in all feasible ways (seven combinations), and one combination was given to each group to watch throughout the self-monitoring phase. Results showed that logging several behaviours

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Graph 3 represents the correct graph between the gravitational force and two point masses.

Let the gravitation force is taken as F and the distance between two point masses is taken as r.

We know the relation between the force, two point masses and distance between masses as,

F = (G m₁ m₂)/r²

where, G is the gravitational constant

m₁ and m₂ two point masses

r is the distance between them

From the above relation, it is clear that, F is inversely proportional to r².

So, when F increases, r² decreases.

The downward hyperbolic graph represented in graph 3 correctly represents the relation between gravitational force and two point masses.

The question is incomplete. the complete question contains various graphs between gravitational force and distance between masses. They are attached in the attachment below.

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Anwser:

A: No

B: No

C: No

Explanation:

V = 50km/h = 14m/s

V2 = 0m/s

t = 5s

a = V2 - V/t = -2,8m/s²

The distance the car will drive when hitting the brakes:

t = 5s

a = -2,8m/s²

v = 14m/s

d = v•t + ½a•t² = 14•5 + -1,4•25 = 35m

and 35m is greater than 5m, and this is even with not counting the thinking time(1,5s), in which the car would have traveled an extra 21m. So 56m in total.

2+ on an atom means that the atom needs 2 electrons to complete its octet.

As we know,

There are two types of elements present one is a Cation and the other is Anion.

Usually, when any of the elements are short 2 or more electrons, then in that case we place a plus sign in the superscript of the elements for denoting the deficiency of the electrons.

If any atom of an alkali metal group which are also called as group 1 atoms loses one electrons then such metals easily form a cation with one positive charge on it, in a same way the atoms of group 2 losses 2 electrons and forms a cations.

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By measuring the length of the pendulum and the period of oscillation at different locations, you can compare the value of g at those locations and see how it varies.

Generally, To determine the acceleration due to gravity using a simple pendulum, you will need to measure the length of the pendulum and the period of oscillation of the pendulum. The period of oscillation is the time it takes for the pendulum to complete one full swing.

To measure the period of oscillation, you can use a stopwatch or a timer to measure the time it takes for the pendulum to swing back and forth a certain number of times (such as 10 swings). The longer the pendulum, the longer the period of oscillation will be.

Once you have measured the length of the pendulum and the period of oscillation, you can use the following equation to calculate the acceleration due to gravity:

g = (4π^2L)/(T^2)

where:

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