jasper and gemma are going to play on a teeter totter. gemma gets on first. when jasper gets on, gemma moves into the air, but she does not move to the top. a girl sits on the left side of a black line resting at its middle on a brown triangle and a boy on the right. which statement could correctly explain the forces acting on the teeter totter? the forces are balanced because jasper weighs the same as gemma. the forces are unbalanced because jasper weighs the same as gemma. the forces are balanced because jasper weighs more than gemma. the forces are unbalanced because jasper weighs more than gemma.

Answers

Answer 1

The forces are balanced because Jasper weighs the same as Gemma.

Force:

A force is an influence that can alter an object's motion according to physics. A force can cause an object with mass to accelerate when it changes its velocity, such as when it moves away from rest. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F.Since forces are perceived as pushes or pulls, this can offer a simple explanation of how forces are described.

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Related Questions

Question 25 What major factor explains the quick adoption of new programs?O One political party supports the program.O The media draws attention to the particular issue. O The public does not hold a very strong opinion on the issue. O There are many interest groups active on both sides of the policy. O The public holds wide enthusiasm for a program. Question 18 1 p What is an important difference in our current political system compared to when the Constitution was created and ratified?O National leaders were only beholden to their own consciences in the past. O National leaders were more careerist and served in the legislature for several decades in the earlier era. O Politics was much more collegial in the previous era. O There was much more openness and transparency in the previous era.O There was much more accountability in the previous era.

Answers

The Major factor explaining the quick adoption of new programs is media draw attention to particular issue.

Our constitution gave our leaders enormous powers and didn't think about how to lead them.

Our Constitution says that 100 sinners may be released, but the innocent should not be punished and blindly obeyed.

Our Constitution contained no rule that the Constitution could be amended or amended only for a limited period of time, but under the strict guidelines of the Constitutional Commission, unlimited amendments were allowed. This provision for the government may prevent the government from doing other work. It also gave some good results.

As you can see in the preface above, “social, economic and political justice. Sometimes, what existed at the economic level is just a giveaway, even for the sake of the name.

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In a mechanical wave, the restoring force is the force that actually causes the oscillation. In which direction does a restoring force act?
A. opposite the direction of the propagation
B. opposite the direction of the displacement from equilibrium.
C. in the same direction as the displacement from equilibrium.
D. in the same direction as the propagation

Answers

The correct option B. opposite the direction of the displacement from equilibrium, is the direction of the restoring force.

Explain the propagation of the mechanical wave?

Mechanical waves that move through a solid, liquid, or gas with a wave speed that is influenced by the elastic and inertial characteristics of that medium.

Mechanical waves can move in either longitudinal waves or transverse waves, which are the two most common wave motions.For a mechanical wave to propagate, the medium's elastic and inertial properties are crucial.A disruption or vibration in matter, if solid, gas, liquid, or plasma, is what generates mechanical waves. A medium is described as material through which waves are propagating. Sound waves are created by vibrations in a gas, while water waves are created by vibrations inside a liquid (air).

Thus, the force that returns an object to its equilibrium position is known as the restoring force; it is denoted by a negative sign since its direction of action is the opposite of that of the displacement.

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what are the currents in the inductor, in resistor r1, and in resistor r2 immediately after the switch is closed?

Answers

The current in both the resistors that is r1 and r2 will be zero after the switch is closed.

What is a resistor ?

The capacitance and inductance can have undesirable effects in high frequency circuits, such as in radio electronics. The majority of foil resistors have a low parasitic reactance, but wirewound resistors are among the worst. The resistor's electrical noise level needs to be as low as feasible for precise applications like audio amplifiers.

Since it cannot change instantly, the current through the inductor is zero when the switch is first closed.

This indicates that the inductor behaves like an open circuit and that all of the voltage is applied across it.

The magnetic field gets stronger as the current ramps up from zero.

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Which of the following, if eliminated, would completely prevent the greenhouse effect from occurring on earth?


A. Chlorofluorocarbons (Incorrect)


B. Clouds (Incorrect)


C. Fossil fuels (Incorrect)


D. Acid rain


E. The ozone layer


F. Atmosphere

Answers

The green house gases can be reduced up to a limit by eliminating the fossil fuels and chlorofluorocarbons. Fossil fuels are the major source of greenhouse gases.

What are green house gases?

Greenhouse gases are those which are capable of  intense absorption of  the temperature  radiated from the earth's surface and make the earth atmosphere warm up.

Greenhouse gases are the main cause of global warming.  Carbon dioxide, methane oxides of nitrogen and sulphur are the green house gases.

Fossil fuels are rich in hydrocarbons and they release these gases when  burned. Mainly methane and other hydrocarbon gases intensely absorbs the temperature which is radiating away from the earth and thus the heat is trapped inside.

Therefore, by eliminating fossil fuels, greenhouse effect can be prevented.

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which one of the following statements concerning electromagnetic waves is false? (1.5 points) (a) electromagnetic waves carry energy. (b) x-rays have longer wavelengths than radio waves. (c) in vacuum, all electromagnetic waves travel at the same speed. (d) lower frequency electromagnetic waves can be produced by oscillating circuits. (e) they consist of mutually perpendicular electric and magnetic fields that oscillate perpendicular to the direction of propagation.

Answers

The incorrect option is (b) X-rays have longer wavelengths than radio waves

Visible light is the term used to describe radiation at wavelengths that humans can see. Your radio detects radio waves, which have much longer wavelengths than visible light. While visible light has a much longer wavelength than X-rays, the latter have much shorter ones.Radio waves are easygoing and weak. Mist can diffuse them, water can short them out, iron beams or plates can stop them. When they strike humans, they cause only a slight warming, unless kilowatts are directly focused on a body as in a microwave (which uses radio waves). We can communicate with the aid of radio waves, which are our friends.They manage to tear right through many materials, and if they do stop, they tear atoms apart into ions, molecules into fragments, often radicals.  They can mutate DNA and have often terrible consequences on progeny if they strike sperm or egg cells. You can use X-rays to image a body’s insides, but you want to be very careful about it.

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a 5.00-m-long ladder, weighing 200 n, rests against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.20 m away from the wall. the center of mass of the ladder is 2.50 m from its base, and the coefficient of static friction between the ladder and the floor is 0.200. how far up the ladder, measured along the ladder, can a 600-n person climb before the ladder begins to slip?

Answers

When a 5.00 m-long ladder, with all weighing of 200 n, rests among a smooth vertical type of wall, then the ladder, will be measured among the the height = 0.488 m.

If θ be the angle ladder makes with the plane

cos θ = 1.2 / 5

Tan θ = 4.04

Let the height a person of weight 600 N  can climb be h from the ground .

Distance from the base point  where ladder touches the floor  = h / tanθ

= h / 4.04

Total reaction force = total downward force

R = 200 + 600

800 N

Frictional force = μ R

= .2 x 800

= 160 N

Taking moment of force about the point on the ladder  where it  touches the floor  and balancing them

= 200 x 1.2 x .5 + 600 x   h / tanθ  = μ R x  1.2 / tanθ ( reaction  at the top point of ladder where it touches the wall is  R₁ and R₁ =μ R   )

= 200 x 1.2 x .5 + 600 x   h / tanθ  = 160 x 1.2 / tanθ

120  - 600 h / 4.04 = 47.52

120 - 47.52 = 600 h / 4.04

72.48= 148.51 h

h = 0.488  m  

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when poked by a spear, an operatic soprano lets out a 1,100-hz shriek. what is its wavelength if the speed of sound is 344 m/s?

Answers

The wavelength of the wave produced by the sound is found as 0.312 m.

Explain the relation of wavelength and velocity?As a result, an increase in just about any one quantity while maintaining a constant value for the other will increase the wave speed, which is mathematically equal to that product of the wave's wavelength and linear frequency.

Mathematically: v = fλ;

In which;

v = speed of the waveλ = wavelength of the wavef = frequency of the wave

The given data for the question-

f = 1100 Hz ; frequency of sound

v = 344 m/s; speed of the sound

λ = wavelength of the wave

Put the value in the formula;

344 = 1100 x λ

λ = 344/1100

λ = 0.312

Thus, the wavelength of the wave produced by the sound is found as 0.312 m.

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"when the frequency of an ac circuit is increased, the current in the circuit does not change. which combination of elements is most likely to comprise the circuit?"

Answers

The elements are inductor , capacitor and resistors.

An LCR circuit, also known as a resonant circuit, tuned circuit, or an RLC circuit, is an electrical circuit consisting of an inductor (L), capacitor (C) and resistor (R) connected in series or parallel. The LCR circuit analysis can be understood better in terms of phasors. A phasor is a rotating quantity.Impendence (Z) of an LCR circuit is given by [tex]Z = \sqrt{R^{2} + (X_{l} - X_{c} )^{2} }[/tex]

Here , [tex]X_{l} =[/tex] reactance and [tex]X_{c} =[/tex] capacitance

At resonance frequency, Z is minimum and current is maximum. For any other value of frequency, the value of current will decrease (when compared to current at resonance).Clearly, the circuit must have inductor and capacitor. However, it may be possible that the circuit also has a resistor besides inductor & capacitor.

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Light passes through the entire thickness of the neural layer of the retina to excite the photoreceptors. True False

Answers

True, The vitreous fluid fills the anterior area of the eye. At which optic nerve exits the eyeball, the optic disc creates a blind patch.

What role does the retina play?

Light that enters your eye is converted by the retina into electrical signals that your nerve cells sends to your brain, which produce the images you see. It's an important aspect of your vision. The coating at the back of our eyeball is called the retina.

What occurs if the retina is harmed?

Loss of eyesight is frequently caused by retinal damage. According to medical professionals, blood vessels are impacted when the retina is hurt due to a disease or an accident. Between the brain and the optic nerve, neurons are transported by the veins. Neurons die when they are harmed, which prevents the brain from receiving visual information.

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what is inertia.....​

Answers

Answer: Inertia is an object’s resistance to a change in its motion. The greater the mass of an object, the greater the force needed to move it or stop it from moving.

Explanation: Hope this was helpful

when you view a distant rainbow, you view from each single water drop that contributes to the bow

Answers

When you look at a distant rainbow, you see "a single color" from every individual water drop that makes up the bow.

Explain the phenomenon of rainbow?

The combination of sunlight and atmospheric factors produces a rainbow.

As light passes from air into denser water in a water droplet, it slows down and bends. Inside the droplet, the light reflects off and splits into its individual wavelengths, or colors. The rainbow is created as light leaves the droplet.A rainbow isn't actually a "thing," and it doesn't have a specific "place" where it exists. It's an optical phenomenon which only manifests when the sun, the atmosphere, and the viewer's position are precisely correct.Water vapor must be suspended in the atmosphere for a rainbow to form. We observe them as a result just after it rains. The rainbow can only be seen when the Sun is in the background and the clouds have cleared away from the Sun.

Thus, when you look at a distant rainbow, you see "a single color" from every individual water drop that makes up the bow.

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in what range of masses are most stars found? in what range of masses are most stars found? 0.1 to 2 solar masses stars can have any mass. 0.1 to 100 solar masses 0.01 to 100 solar masses 1 to 3 solar masses

Answers

From 0.08 to 150 (or more) fold the mass of the Sun, stars' masses fall within this range.

What factors affect a star's life span?

The mass of a star affects its life cycle. Its life cycle is shorter the greater its bulk. The amount of available stuff in a star's nebula, the enormous cloud of gas and dust in which it was born, determines the star's mass.

Which stars have the most time left in them?

The majority of the galaxy's stars are red dwarf stars, but they are too faint to be seen from Earth with the human eye and remain hidden in the background. Their lifespans, which are much longer than that of the sun, are prolonged by their limited brilliance.

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Which of the following explains the relationship between wavelength and frequency of light?a. The longer the wavelength, the higher the frequency.b. The shorter the wavelength, the lower the frequency.c. The wavelength and frequency are not related to each other.d. The longer the wavelength, the lower the frequency. ​

Answers

Answer:

(d) the longer wavelength the lower the frequency:

V = λ * f

For a given velocity - λ and f are inversely related

a) power-driven scaling devices convert electrical energy (ultrasonic) or air pressure (sonic) into high-frequency sound waves. b) sound waves produce rapid mechanical vibrations in the specially designed scaling tips.

Answers

Ultrasonic scaler is the power-driven scaling instrument that convert a high-frequency electrical current into mechanical vibrations.

It operates in a frequency range between 25,000 to 50,000 cycles per second.Ultrasonic scaling device that generates a magnetic field and produces tip vibrations by the expansion and contraction of a metal stack or rod is called Magnetostrictive.

Advantages of Ultrasonic Scaling:

Rapid removal of calculus deposits and plaque biofilm.Less clinician hand fatigue.Less patient discomfort.Disrupts bacterial colonies.Decreases tissue trauma.Less tissue distention.Decreases healing time.Allows for irrigation.Delivery of antimicrobials.

Purposes and Uses of ultrasonic and sonic scaling:

Supragingival calculus & stain.Subgingival attached & unattached plaque, calculus, endotoxins.Initial debridement for NUG .Furcation debridement.Narrow pockets & difficult areas.Debridement prior to oral surgery.Removal of orthodontic cementum.Overhang removal.

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(a) a laser emits light that has a frequency of 4.69 * 1014 s - 1. what is the energy of one photon of this radiation? (b) if the laser emits a pulse containing 5.0 * 1017 photons of this radiation, what is the total energy of that pulse?

Answers

A light pulse is a flash. Lasers and related devices have amazing potential for generating light pulses with very specific properties. There are various techniques for using lasers to generate nanosecond, picosecond and even femtosecond pulses.

Light energy is a form of kinetic energy that has the ability to make some kind of light visible to the human eye. Light is defined as a form of electromagnetic radiation emitted by hot objects such as lasers, incandescent bulbs, and the sun. Light contains photons, which are tiny packets of energy.

(a) Energy of photon = planck' constant x fequency

                                    =6.6x10^-34 x4.69 x10^14 J

(b) Energy of 5.0x10^17 photons = 6.6x10^-34 x 4.69x10^14 x5.0x10^17

The energy of a single photon is: hν or = (h/2π)ω where h is Planck's constant: 6.626 x 10-34 Joule seconds. Photons in visible light contain about 10-19 Joules per second in the beam.

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500 joules of heat is absorbed by a system that does 200 j of work on its surroundings. 1) what is the change in the internal energy of the system? (express your answer to one significant figure.)

Answers

The change in the internal energy of the system is 3 *10^2 J

Work is done by system.

Hence work is negative.

Change in internal energy=500-200 = 300=3 *10^2 J

law of conservation Energy:

The law of conservation of energy states that energy is neither created nor destroyed, and can only be converted from one form of energy to another. This means that the same amount of energy is always available in the system unless supplied externally. This is especially confusing for non-conservative forces where the energy is converted from mechanical to thermal but the total energy remains the same. The only way to use energy is to convert it from one form to another.

The energy content of each system is determined by the formula:

UT=Ui+W+Q

where;

.UT is the total internal energy of the system.

.Ui is the initial internal energy of the system.

.W is work done by or on the system.

.Q is the heat added to or removed from the system. It is also possible to determine the change in internal energy of the system using the

equation: ΔU=W+Q

This is also a statement of the first law of thermodynamics.

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what is the average magnitude of the poynting vector 4.00 mi from a radio transmitter broadcasting isotropically (equally in all directions) with an average power of 260 kw?

Answers

307.4 μW/m² average magnitude of the pointing vector 4.00 mi with an average power of 250 kw

Power is produced when a force causes a displacement. Power has no bearing on how long it takes for a force to cause a displacement. The process's pace might range from swiftly concluding to taking some time.

For example, it takes an abnormally long time for a rock climber to elevate her body a few meters over the cliff's edge. On the other hand, a trail hiker may swiftly raise her body a few meters if she selects the faster path up the mountain. Despite making the same amount of work, the hiker completes the task far quicker than the rock climber..

S-average=power/area

power=260 kw

area=4π(8045)²

S-average=260/4π(8045)²

S-average=307.4 μW/m²

Therefore, the average magnitude with average power of 260 W is 307.4 μW/m²

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the direction of the force of sliding friction is always select one to that of velocity of the object and is select one static friction.

Answers

The direction of the force of sliding friction is always that of velocity of the object.

What is Static friction?

Moving against the surface's normal, the force of sliding friction acts in a direct proportion to the weight.

Sliding or kinetic friction is the resistance to the actual relative sliding motion between two surfaces in contact.

Let's start by learning about frictional forces from a basic understanding. If a metal block is on a table, it might not move in response to a weak force.

The metal block begins to move as the force is gradually increased.The resistive force provided by the metal block in its static form is the same as the controlling value of the force at which the metal block begins to move.Static Friction is the name given to this resistive force. The metal block starts to budge as the experiment continues and the force is increased.

Moving against the surface's normal, the force of sliding friction acts in a direct proportion to the weight. In particular, if the surface on which the body slides is horizontal, the normal force will be equal to the object's weight.

Thus, F = u tanα

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you add equal amounts of heat to two identical cylinders containing equal amounts of the same ideal gas. cylinder a is allowed to expand, while cylinder b is not. Part A How do the temperature changes of the two cylinders compare?

Answers

By ideal gas theory, cylinder b has the higher temperature do the temperature changes of the two cylinders compare.

What is an ideal gas explain?

The phrase "ideal gas" describes a fictitious gas made up of molecules that adhere to the following principles: No attraction or repellence exists between the molecules of ideal gases. The sole action between molecules of an ideal gas would be an energetic collision when they collided or an athletic collision with the container walls.

Briefing:

To answer this issue, we must be familiar with the ideal gas theory. The ideal gas is depicted by

P . V = n . R . T

where R is the ideal gas constant, T is the temperature, n is the number of molecules, P is the pressure, V is the volume, and.

We can infer from the given query that

Pa = Pb = P

na = 3nb

Find the cylinder's temperature in a

P . V = n . R . Ta

Ta = P . V /( na . R )

Substitute na

Ta = P . V /( (3nb) . R )

Ta = (1/3) x (P . V /( (nb . R ))

Find the temperature of the cylinder b

P . V = n . R . Tb

Tb = P . V /( nb . R )

The temperature in cylinder an is three times lower than that in cylinder b.

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The force opposing the normal force is?
A. Static friction
B. Applied
C. Gravity
D. Kinetic friction
E. None of the above

Answers

D. Kinetic Friction

Who of the following would be included in the Bureau of Labor Statistics' "unemployed" category?

a. Miguel, who is on temporary layoff.

b. Reta, who worked only 15 hours last week.

c. Marisa, who neither has or job or looking for one.

d. None of the above is correct.

Answers

The correct option is (d). none of the above is correct .For the "unemployed" category.

According to the Organization for Economic Co-operation and Development (OECD), unemployment is defined as those over a certain age (often 15) who are not now employed or self-employed but are nonetheless currently available for work during the reference period.The number of unemployed people as a percentage of the labour force serves as a proxy for unemployment, which is expressed as the unemployment rate (the total number of people employed added to those unemployed).

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suppose a guitar string has a resonant frequency of 329.6 hz and a q of 632. after you pluck the string, how many periods of oscillation would it take for the energy of the vibrating string to decay by a factor of e? how many seconds will that take?

Answers

It would take 100.6 periods of oscillations  for the energy of vibrating string to decay in 0.305 seconds.

Resonance is defined as a system's tendency to vibrate with increased amplitude when frequencies are excited. The maximum frequency at which the amplitude is relatively maximum is referred to as the resonance frequency or resonant frequency. The sharpness of the resonance is defined by the Q factor.

Given,

resonant frequency, f = 329.6 Hz

Quality factor , Q = 632

We know that that quality factor is equal to [tex]2\pi[/tex] .i.e [tex]Q=2\pi[/tex]

then, for  2 periods of oscillations , the energy of vibrating string to decay by factor of 'e' be

[tex]Q=2\pi n\\\\632=2\pi n\\\\n=\frac{632}{2\pi}\\\\n=100.63[/tex]

then, the time elapsed can be determined by,

[tex]f=\frac{n}{T}\\\\329.6=\frac{100.63}{T}\\\\T=\frac{100.63}{329.6}=0.305s[/tex]

Thus, the energy of a vibrating string would decay in 0.305 seconds after 100.6 oscillations.

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Two economists agree that labor market discrimination against certain workers unfairly leads to lower wages for the disfavored group. Economist X argues that government intervention is most likely necessary to eliminate this unfair treatment, whereas Economist York argues that the best solution to the unfair treatment is to let the market work to eliminate it on its own.
Economist Y is most likely to be correct when labor and product markets are highly competitive and the lower wages of the disfavored group result from:
A. Differences in human capital
B. Statistical discrimination
C. Discrimination by employers

Answers

Answer: C. Discrimination by employers

Explanation:

Economist Y is most likely to be correct when labor and product markets are highly competitive and the lower wages of the disfavored group result from discrimination by employers.

option C is the correct answer.

What is labor discrimination?

Discrimination in the workplace happens when an employer treats his or her employee unfairly or unequally because of specific characteristics.

Labor market discrimination against certain workers unfairly leads to lower wages for the disfavored group.

Example of labor market discrimination include the following;

when an employee is fired, when an employee is demoted, or when an employee is denied promotion due to some unjustified cause

According economist Y, government intervention cannot eliminate this unfair treatment since it is caused by the market (employers) and the best solution to the unfair treatment is to let the market (employers) work to eliminate it on its own.

Thus, economist Y is correct because this discrimination is caused by the market (employers).

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If we have a new moon today, when we will have the next full moon?

in about 6 months
in about a month
in about 2 weeks
in about 1 week

Answers

If we have a new moon today, we will have the next full moon in about 2 weeks.

What is the time difference between  a new moon and  the next full moon?

The midpoint of the cycle (half of 30 = 15) is marked by the full Moon, which occurs approximately 15 days (14.8 to be exact) following the new moon. Similar to the New Moon phase, the Moon is once again in alignment with the Earth and Sun during full moon.

However, this time, the Moon is on the other side of the Earth, thus the full area of the Moon that is illuminated by the Sun is facing us. Immediately following this brief interval, visibility starts to decline.

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a long, straight wire extends into and out of the screen. the current in the wire is

Answers

In the given scenario, the current is out of the screen following the right-hand rule. (Option A)

According to the figure provided the compass needle rotates in a counter-clockwise direction. The right-hand rule could be used to determine the direction of the magnetic field at the specific location. The right-hand rule states that to determine the direction of the magnetic force on a positive moving charge, point your right thumb in the direction of the velocity (v), your index finger in the direction of the magnetic field (B), and your middle finger will point in the direction of the resulting magnetic force (F). Hence, point the thumb in the direction that current is flowing and then curl the fingers around the line. Magnetic field direction will be indicated by the curling of fingers. Because the direction of rotation for the compass needle is in the opposite direction to clockwise, it would be counter- clockwise for the magnetic field direction. Hence, the current is out of the screen.

Note: The question is incomplete as it is missing options which are A) Out of the screen. B) There is no current in the wire. C) Into the screen. D) There is not enough information to tell the direction.

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a tire has a tread pattern with a crevice every 2.25 cm. each crevice makes a single vibration as the tire moves. what is the frequency (in hz) of these vibrations if the car moves at 27.2 m/s?

Answers

The each crevice makes a single vibration as the tire moves. what is the frequency (in hz) of these vibrations if the car moves at 27.2 m/s Frequency =1208.9 Hz

From the question, we have

speed = 27.2 m/s = 2720 cm/s

The tire has a tread pattern with a crevice every 2.25 cm

frequency = 2720/2.25

=1208.9 Hz

Frequency :

The quantity of waves that pass a set location in a predetermined period of time is known as frequency. Therefore, if a wave passes through in half a second, the frequency is 2 per second. The frequency is 100 times per hour if it takes 1/100 of an hour. The frequency of the wave is the sum of all waves generated in a second. Frequency is the measure of how many vibrations occur per second. Here is a straightforward illustration: The frequency of the waves will be 5 hertz (Hz) or 5 cycles per second if five full waves are created in one second.

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Which of the following device can be used for measurement of frequency?
a) Voltmeter
b) Ammeter
c) Stroboscope
d) None of the mentioned

Answers

A stroboscope is a tool for measuring frequency that makes use of a second reference voltage with a predetermined frequency. Ammeters are used to measure current, while Voltmeters are used to measure voltage.

Which two instruments are used to measure frequency?

We provide two different types of frequency meters among our measuring tools: laboratory frequency meters (tabletop), which have a measurement range of 0.1 Hz to 1.5 GHz, and pocket frequency meters, which have a measurement range of 10 Hz to 2,6 GHz.

What is a frequency measurement device?

A gadget that shows the periodicity of an electrical signal is a frequency meter. The employment of various mechanical frequency meters has changed over time, but since the 1970s, digital frequency counts have mostly taken their place.

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if the ring is off center when it hits the disk how will that affect the results? think about the effect on the moment of inertia

Answers

If the ring is off-center when it hits the disk, the disk will still spin, but the moment of inertia will be affected.

The off-center location of the ring will cause the disk to be unbalanced, which will cause the moment of inertia to be lower than it would be if the ring were centered. This means that the disk will not spin as rapidly or as long as it would if the ring were centered.

This means that the rotational energy of the ring will not be distributed evenly and the result will be an unbalanced, or skewed, rotation. This will cause an inaccurate measurement of the moment of inertia, as the off-center ring will not be able to provide a true representation of the rotational energy.

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g a photon with an energy of 8.61 ev is absorbed by a metal that has a work function of 5.75 ev, resulting in the ejection of an electron. what is the maximum kinetic energy of the electron in ev?

Answers

The maximum kinetic energy of the electron in ev is 2.86 ev.

We know the relation between energy, work function and maximum kinetic energy as,

E = W + KE max -----(1)

where, E is the energy absorbed

W is the work function

KE max is the maximum kinetic energy

It is also known as photoelectric equation.

Given that,

E = 8.61 ev

W = 5.75 ev

KE max = ?

By substituting the above values in equation (1), we have

8.61 = 5.75 + KE max

KE max = 2.86 ev

Thus, the maximum kinetic energy of the electron in ev is 2.86 ev.

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compared to an omnidirectional antenna, a dish antenna quadruples radiated power. how much is this change in decibels

Answers

Change in decibels is  20 dB.

The power emitted by an antenna is measured in decibels (dB). Antenna gain, which is a measure of how strong the signal it transmits or receives is compared to a reference antenna, is also measured in dB.

To calculate the change in decibels due to a change in power, we can use the following formula:

change in dB = 10 × log10(new power / old power)

So comparing an omnidirectional antenna to a dish antenna, if the dish antenna quadruples the radiated power, the change in decibels is:

Change in dB will be 10 × log10(4 / 1)

= 10 × 2 = 20 dB

This means that a parabolic antenna has 20 dB more gain than an omnidirectional antenna.

It is important to note that this is only an approximation and the actual gain of an antenna depends on many factors such as antenna size, shape, orientation, and frequency of the signal being transmitted or received.

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