When conducting a polygraph test why is it important for the interviewer to establish a baseline on the interviewee?

Answer: The lead is more dense :)

Explanation:

Answer:

More horsepower = more power use.

Explanation:

Horsepower is just a measure of power, similar to Watts (1 horsepower = 745.7 W). So, as a simple example, a lightbulb that uses 1 hp will have a higher power use than a lightbulb that uses 2 hp.

Answer:

The answer is 9.4 m/s

Explanation:

Because you add 5.0 + 4.5= 9.4

Answer:

A) Independent

B) Dependent

C) Mass

Explanation:

The speed applied to the physics cart is manipulated. This doesn't depend on another variable. Thus, speed is the (independent) variable.

The cart accelerates due to the speed applied to the cart. Acceleration depends on the speed applied. Thus, acceleration is therefore the (dependent) variable.

A “constant” is a parameter that remains the same regardless of the variables.

One parameter of the cart that is held constant is the (mass).

Answer:

mass can be expressed in newtons

Answer:

While rubbing the two charge producers together inside the basket, the charge detected is Zero. After rubbing, with wands still in the basket, but not touching, the charge detected is Zero. The charge detected on the white wand along is Positive.

a) Answer: On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.

The equator receives an equal day and night (12 hours each) regardless of the day of the year due to the Circle of Illumination, which is a line that separates the day side of the earth from the night side of the earth. The Circle of Illumination separates the sunlit and dark sides of the earth. The earth's axis is at a 23.5-degree angle to the plane of its orbit around the sun, causing different latitudes to receive different amounts of sunlight throughout the year. On the equator, the Circle of Illumination divides the earth into two equal parts, with each part receiving 12 hours of daylight and 12 hours of darkness.

b)  Answer: The earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.

On December 22nd, between the latitudes of the Tropic of Cancer (23.5°N) and the Arctic Circle (66.5°N), 24 hours of daylight is experienced. This occurs because the earth's axis is tilted at 23.5°, and during the December solstice, the North Pole is tilted away from the sun, causing the Arctic Circle and areas beyond it to experience a full day of daylight because the sun is above the horizon for 24 hours.

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Answer:

306.4J

Explanation:

Given parameters:

Displacement  = 50m

Force  = 80N

Angle  = 40°

Unknown:

Work done  = ?

Solution:

Work done is the force applied to move a body through a certain distance.

    Work done  = Force x displacement cos Ф

   Work done  = 8 x 50 cos 40  = 306.4J

Answer:

. Carpet has a rougher surface than the bare floor, so there are more areas for the object to have friction with the rougher surface and slow down.

Explanation:

An object that is sliding across carpet slow down because of friction acting between its rougher surface and the surface of the object.

When two bodies come in touch with each other, friction, a sort of relative force, acts as a resistance. In other words, friction force opposes the relative motion of two bodies when they come into touch with one another.

When an object is sliding across carpet, it has to pass through a surface which is more rough compare to plane surface. So, frictional force will be greater in this case compare to plane surface. This frictional force resists the sliding of the object and the object slows down gradually.

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The frequency of the second harmonic of a note with a fundamental frequency of 200 Hz is 400 Hz, and the frequency of the third harmonic is 600 Hz.

To calculate the harmonics of a note, you will need to know the fundamental frequency of the note. The frequency of the second harmonic is twice the fundamental frequency, and the frequency of the third harmonic is three times the fundamental frequency. For example, if the fundamental frequency is 200 Hz, then the frequency of the second harmonic is 400 Hz and the frequency of the third harmonic is 600 Hz.

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The tension in the string if a rod PR is balanced on a pivot at the end R while a string is used to support the rod at P is 6 N

Moment = Force * Perpendicular Distance

Let us consider the pivot side be initial point,

Since the rod is balanced,

CM = ACM

CM = Clockwise moment

ACM = Anticlockwise moment

F = 9 N

PQ = 15 cm = 0.15 m

QR = 30 cm = 0.3 m

PR = PQ + QR

PR = 0.15 + 0.3

PR = 0.45 m

CM = W * QR

CM = 9 * 30

CM = 2.70 N m

ACM = T * PR

ACM = 0.45 T N m

2.70 = 0.45 T

T = 6 N

Therefore, the tension in the string is 6 N

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The new angle of deflection of the north pole of the compass needle compare to its initial deflection is smaller.

The new angle of deflection north pole becomes smaller

The angle of deflection is the angle formed when an object changes course from its original course of direction or target.

The angle of deflection of a particular particle is directly proportional to its charge to mass ratio as it passed through an electric field.

As the wire is continuously being lowered farther from the compass, the angle of deflection of the north pole continues to become smaller when compared to its initial deflection.

Therefore, the new angle of deflection of the north pole of the compass needle compare to its initial deflection is smaller.

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Answer:

potential energy=mgh (weight × height)

m=20kg

g=9.8m/s2

h=8

20×9.8×8=1568

The potential energy is 1568J

Answer:

Potential energy = m × g × h

m = 20 kg

acceleration due to gravity = 9. 8 m/ s 2

height ( h ) = 8

= 20 × 9.8 × 8

= 1568

:. potential energy = 1568 Joule

Answer: A

Explanation:Convection currents in the mantle Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. The Earth's surface lithosphere rides atop the asthenosphere and the two form the components of the upper mantle.

Answer:

B

Explanation:

The statement which is not correct is B. Saturn has the strongest magnetic field among all planets in our solar system.

Answer: B. Saturn has the strongest magnetic field among all planets in our solar system.

Explanation: Although Saturn does have a strong magnetic field, it is not the strongest among all planets in our solar system. Jupiter has the strongest magnetic field among all planets in our solar system, and its magnetic field is about 20,000 times stronger than Earth's. The other statements are correct: A. The average density of Saturn is lower than the density of liquid water, which means that it would float on water. C. The magnetic fields of Jupiter and Saturn are related to the metallic hydrogen inside of them. Metallic hydrogen is a form of hydrogen that behaves like a metal and conducts electricity. D. Uranus and Neptune have global-scale magnetic fields, which means that their magnetic fields are not concentrated at the poles like Earth's, but rather they encompass the entire planet.

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This means that measuring the pulling froce F is like measuring the force of static friction fs . Uk = FK . here

f= FK. FK = force of kinetic friction uk = coefficient of kinetic friction and N= normal to the contacting surfaces.

Answer:

Work

Explanation:

The use of force to move an object is the definition of "work" in physics.

Answer:

the answer should be wave

Answer:

c

Explanation:

Answer:

c

Explanation:

the DNA replication happens in the s phase of interphase

According to the one-year calendar model based on the Big Bang theory, life on the planet began in August.

The Big Bang theory is the most recent conjecture for the creation of the universe. The big explosion that occurred 13.7 billion years ago is believed to be the beginning of the journey of the entire universe.

The big bang theory describes the creation of the universe as an expansion of matter which then exploded like a giant balloon that is constantly being filled with air. The remnants of these explosions then each became the seeds for the formation of galaxies, solar systems, and the various objects that fill them.

Revealed, Dark Energy in the Universe in Cosmology

Cosmologists and physicists call the universe currently expanding as a result of the Big Bang explosion. Even the speed of its expansion is believed to continue to increase.

Scientists have also found predicted thermal signatures from the Big Bang, the cosmic microwave radiation that enveloped the universe. In the thermal traces there are no objects older than 13.7 billion years, indicating that the universe was born around that time (the time of the Big Bang phenomenon).

The traditional Big Bang theory holds that the universe began from a singularity, or point of infinite density and temperature whose properties are difficult for the human mind to comprehend.

But the theory does not accurately describe anything obvious, because the singularity idea is based on Einstein's general theory of relativity.

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The answer is light.

Light is considered electromagnetic along with radio. Electromagnetic waves do not require any medium to travel, and therefore is able to travel through a vacuum.

Hope this helped!

The correct answer is D. Amount of time and area of physical contact between the substances.

Explanation:

Heat transfer refers to the flow of thermal energy or heat between two or more objects. This process involves multiple factors and implies heat from the hottest object goes to the coldest one until there is an equilibrium. To begin, heat transfer depends on the amount of thermal energy in the objects because objects must have a different amount of thermal energy for heat to flow.

Besides this, the amount of energy that flows depends on the time and the contact between the substances of objects. Indeed, objects need to be in contact or close to each other for heat to transfer, and the time needs to be enough for the process to occur. For example, if you place a pot over the fire just for a few seconds it is likely the heat transferred is minimal, which does not occur if you leave the pot more time. At the same time if the pot is in close contact with fire more heat will be transferred.-

Answer:

the answer is D on edginuity.

Explanation:

Answer:

The velocity when the ball hits the ground is obtained using v2. 2 = v1. 2 + 2 g Dy with v1=0 and Dy=h. Thus solving for v2 yields 17.1 m/s v2 = 2 g h =.

21 pages·330 KB

Answer:

I e jofh ndoj eohe nc n very nic e

the force between the two wires if they are separated by 2.50 cm is 0.525 N.

Given that force F between two parallel wires carrying electric currents is inversely proportional to the distance d between the wires and that a force of 0.750 N exists between wires that are 1.75 cm apart and that we are supposed to find the force between them if they are separated by 2.50 cm.

Let the initial force be F₁ and the initial distance be d₁.

Therefore, we can write the relationship between force and distance as;

F₁d₁ = F₂d₂

Where

;F₁ = 0.750 N (initial force)

d₁ = 1.75 cm (initial distance)

F₂ = ? (force at new distance)

d₂ = 2.50 cm (new distance)

Let us find F₂;F₁d₁ = F₂d₂F₂ = F₁d₁/d₂

Now substitute the values we know;

F₂ = (0.750 N x 1.75 cm) / 2.50 cmF₂ = 0.525 N

Therefore, the force between the two wires if they are separated by 2.50 cm is 0.525 N.

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Yes, if a dust particle is flowing in the air and a sound wave passes through, the dust will move in the direction of the wave. This phenomenon is known as acoustic radiation force or acoustic streaming. It occurs due to the transfer of energy from the sound wave to the particle.

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Kinetic energy is the kind of energy mentioned. The energy an object has as a result of its motion is known as kinetic energy.

Sound is a pressure density wave, whereas light is an electromagnetic wave. Sound must pass through a medium in order to be heard, but light does not. Sound energy is a continuous stream of energy on the scale while light energy is quantized into packets of energy called photons.

Sound is the longitudinal (compression or rarefaction) wave-based transfer of energy through materials. When a force causes an object or substance to vibrate, sound is created. That is to say, the substance serves as a conduit for the energy.

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The type of energy mentioned is kinetic energy. Kinetic energy is the energy that an object has as a result of motion.

Light is an electromagnetic wave, whereas sound is a pressure density wave. Light does not require a medium for transmission, but sound must. On the scale, sound energy flows continuously, whereas light energy is quantized into units of energy called photons.

The longitudinal wave-based transport of energy through materials is known as sound. Sound is produced when a force causes an item or substance to vibrate. In other words, the substance acts as a conduit.

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____________ energy the energy of motion, observable as the movement of an object or subatomic particle. Every moving object and particle have this energy. A person walking, a soaring baseball, a crumb falling from a table and a charged particle in an electric field are all examples of this energy at work.

What type of energy is described above? A. sound energy B. light energy C. heat energy D. kinetic energy

Answer:

Momentum is conserved.

All of the others are not conserved because of heat loss caused by deformation, etc.

Without a figure provided, it is impossible to give a specific answer to this question. The magnetic field at the position of the dot will depend on the specific configuration and placement of the magnetic sources in the figure.

In order to calculate the magnetic field at a specific point, we would need to know the magnetic properties of the sources, their orientation, and the distance between them and the point in question.

However, in general, the magnetic field at any point in space can be described as a vector quantity, with magnitude and direction. It is typically measured in units of tesla (T) or gauss (G). The direction of the magnetic field is given by the direction of the magnetic force on a positive test charge placed at that point, and the magnitude of the field is proportional to the strength of the force.

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Answer:

0.8 g/cm^3

Explanation:

mass of liquid = mass of beaker + liquid - mass of beaker

= 170g -130g = 40 g

density = mass/ volume

therefore:

density of volume = \(\frac{40g}{50cm^3} = 0.8 g/cm^3\)

where need be for 3 significant figure or 2 decimal place, just add zeros at the back of the 8