a 79.0-kg person stands on a scale in an elevator. what is the apparent weight in each of the following situations? (a) when the elevator is accelerating upward with an acceleration of 2.00 m/s2

Answer:

..

Explanation:

Coordinate adjectives are adjectives that describe the same noun equally. They should be separated with commas. In this sentence, both red and round are describing the ball. The correct answer is, "The red, round ball is Adley's favorite toy to play with."

Correct calibration of the EKG machine is evidenced by a calibration wave that is 10mm high and square in shape.

Common calibrations, typically performed in commercial calibration laboratories, are performed using the manufacturer's calibration procedures and using reference standards that are many times (typically four times) more accurate than the DUT.

Calibration is normally performed to identify errors or to check the accuracy of unknown values ​​of the DUT. As a simple example, you can measure the temperature of a DUT thermometer in the water of a known boiling point (212 degrees Fahrenheit) and perform a calibration to determine instrument error and analyte concentration. This relationship makes it possible to determine the concentration of an analyte in an unknown sample.

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Answer:

Roughly 25 meters

Explanation:

Use the formula D=1/2*a*t^2 where d=distance, a=acceleration, and t=time

Plug in all the variables we know...

D=1/2*a*12^2

in order to solve for acceleration, we use the formula  F=ma where F=force, m=mass, and a=acceleration.

Plug in known variables,

342N=989kg*a

solve for a and we get...

342N/989kg=a

Now that we know the acceleration, we can plug that into our original equation and solve for distance.

D=1/2*342N/989kg*12s^2

Simplify,

D=72s^2*342N/989kg

D=72s^2*342kgm/s^2/989kg

D=72s^2*342m/s^2/989

D=72*342m/989

D=24624/989 meters, or 24.898meters which rounds up to 25.

Answer:

Force of gravity.

So I think it's the gravity option?

Gravity keeps earth and other objects in the solar system from spinning off into outer space.

The force that pulls objects towards the center of a planet or other body is known as gravity.

Here,

Since it depicts the interaction that results when two masses are in close proximity, gravity is in fact a force. The warping of spacetime and the motion of things through the stretched spacetime are the primary causes of gravitational effects.

It appears as though a force was exerted towards the end, though.

The force that pulls objects towards the centre of a planet or other body is known as gravity. All of the planets are kept in orbit around the sun by the force of gravity.

We are confined to the surface of the Earth by gravity alone. Size, mass, density, and composition of planets are all quantifiable characteristics. The gravitational pull of a planet is determined by its size and mass.

Hence,

Gravity keeps earth and other objects in the solar system from spinning off into outer space.

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Answer:

0 degrees latitude

Explanation:

At 0 degrees latitude, the Equator is an invisible line that circles the Earth's center.

Given,

The mass is m=1200kg

Height is h=14 m

Power is P=9kW

We know

Energy per unit time is power.

Thus,

P=mgh/t

where t is the time.

Thus,

The time is 18.312 sec.

Answer:

884 meters

Explanation:

h=(340 m/s) x (5.2 s)=1,768

1,768/2=884 meters!

Hope this helped!

Answer:

Explanation:

Newton

The possible ways that heat can be transferred in this system are:

The most typical method of heat transfer is conduction, which involves the direct exchange of heat between two things.

Heat waves are created during the radiation heat transfer process and may be absorbed, reflected, or transmitted through a cooler substance. Earth is warmed by the sun using electromagnetic radiation. Heat waves come from warm bodies.

When Joiya sets the bottle of water down on a table or chair, then by conduction, heat ( or the loss of it ) would move around the table. Radiation would allow for the cold temperature to move into the air around the cold bottle.

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Options for this question include:

Temperature is a measure of the average kinetic energy  energy of particles in a substance.

Temperature and kinetic energy have a directly proportional relationship.

Kelvin, Celsius, and Fahrenheit are three types of Temperature scales.

The average kinetic energy of the particles in a substance is measured by temperature. The overall kinetic energy of the particles in a substance is measured by its thermal energy. The temperature and thermal energy of a substance increase with particle mobility.

The average kinetic energy of a substance's particles is directly proportional to the substance's temperature.

The three temperature scales that are now in use are Kelvin, Celsius, and Fahrenheit.

Typically, calories or joules per gramme per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gramme per degree Celsius.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion. According to Zoe, a material has a temperature of 12 degrees Celsius. What does this indicate to Zoe regarding the substance? It has an average kinetic energy of 12 Celsius.

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Temperature is a measure of the average kinetic energy  energy of particles in a substance.

Temperature and kinetic energy have a directly proportional relationship.

Kelvin, Celsius, and Fahrenheit are three types of Temperature scales.

The average kinetic energy of the particles in a substance is measured by temperature. The overall kinetic energy of the particles in a substance is measured by its thermal energy. The temperature and thermal energy of a substance increase with particle mobility.

The average kinetic energy of a substance's particles is directly proportional to the substance's temperature.

The three temperature scales that are now in use are Kelvin, Celsius, and Fahrenheit.

Typically, calories or joules per gramme per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gramme per degree Celsius.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion.

Temperature is a measurement of that energy in substances, whereas kinetic energy is the energy of motion. According to Zoe, a material has a temperature of 12 degrees Celsius. What does this indicate to Zoe regarding the substance? It has an average kinetic energy of 12 Celsius.

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Magnetism is using a reference point to help her in her measurements.

The force that magnets use to either attract or repel one another is known as magnetism.

The force that magnets use to either attract or repel one another is known as magnetism. Electric charges in motion are the source of magnetism.

Atoms, the smallest building blocks of matter, make up every substance. There are electrons in every atom, which are charged particles. The electrons that make up an atom's nucleus, or core, spin like tops.

Therefore, Magnetism is using a reference point to help her in her measurements.

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Answer:

neap tide i think or high tide

For the right block to balance the forces and remain steady, it needs to weigh 7.9 kg.

The force is an external agent which is applied to the body or an object to move it or displace it from one position to another position.

When there is no net force acting on the system, the two blocks stay in place. In this instance, the strain in the rope holding the two blocks together balances the pull of gravity on them. The sine of the angles, along with the masses of the blocks, can be used to calculate the tension in the rope.

\(T= (m_1 \times g) \times sin(\theta_1) + (m_2\times g) \times sin(\theta_2)\)

Substituting the known values:

\(T = (10 \times 9.8 )\times sin(23^o) + (m_2\times 9.8 )\times sin(40^o)\)

Solving for m₂:

\(m_2= \dfrac{(T- (10 \times 9.8 )\times sin(23^o)} { (9.8\times sin(40^o))}\)

The mass of the right block must be 7.9 kg for the two blocks to remain stationary.

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The question is -

Two blocks in the Figure below are at rest on frictionless surfaces What must be the mass of the right block so that the two blocks remain stationary? 4.9kg 6.1kg 7.9kg 9.8kg

0.77 m/s2 directed 35° south of west

net force = (-17,-12)

net force = mass * acceleration

(-17,-12) = 27 * (x-acceleration,y-acceleration)

(x-acceleration,y-acceleration) = (-17/27,-12/27) = (-0.629629629..., -0.444...)

angle of acceleration = tan^-1 (-0.444.../-0.629629...) = 35.21759 degrees below negative x-axis.

magnitude of acceleration = sqrt((-0.629629...)^2 + (-0.444...)^2) = 0.77069 (5dp)

Answer:

A police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase.

Explanation:

In Physics, Doppler effect can be defined as the change in frequency of a wave with respect to an observer in motion and moving relative to the source of the wave.

Simply stated, Doppler effect is the change in wave frequency as a result of the relative motion existing between a wave source and its observer.

The term "Doppler effect" was named after an Austrian mathematician and physicist known as Christian Johann Doppler while studying the starlight in relation to the movement of stars.

The phenomenon of Doppler effects is generally applicable to both sound and light.

An example of the Doppler effect is a police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase. This is so because when a sound object moves towards you, its sound waves frequency increases, thereby causing a higher pitch. However, if the sound object is moving away from the observer, it's sound waves frequency decreases and thus resulting in a lower pitch.

Other fields were the Doppler effects are applied are; astronomy, flow management, vibration measurement, radars, satellite communications etc.

Answer:

A police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase.

Explanation:

This should be the correct answer.

Answer:

169ml

Explanation:

Secondary atmospheres are formed by outgassing and external sources. They primarily come from volcanic activity and comet impacts .

So, the correct answer is B and C.

Volcanoes release gases such as water vapor, carbon dioxide, and nitrogen, which contribute to the formation of secondary atmospheres.

Comets can also bring in volatile compounds like water and other gases when they collide with a planet.

While trees (a) and humans (e) can have an impact on the atmosphere, they are not primary sources of secondary atmospheres. Hydrogen from the central star (d) is also not a significant contributor to secondary atmospheres.

Hence, the answer of the question is B and C.

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Servicing MVAC (Mobile Air Conditioning) systems on hybrid and electric vehicles typically requires specialized knowledge and equipment due to the unique characteristics of these vehicles.

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The two pulses will have Constructive interference. Constructive interference occurs when the maxima of two waves add together (the two waves are in phase), so that the amplitude of the resulting wave is equal to the sum of the individual amplitudes.

Constructive interference occurs when the maxima of two waves add together (the two waves are in phase), so that the amplitude of the resulting wave is equal to the sum of the individual amplitudes. Equivalently, the minima of the waves would be aligned

This is an example of a standing wave produced when two ends of a string are oscillated in the same plane. The displacement of of point on two ends oscillates vertically.

We are given that two pulses move along the string each coming towards each other and meet at a common point ( P ).

Each pulse have their own magnitude or displacement in the vertical plane. If the pulses are to meet at a common point at the same instant, then they interfere with each other constructively.

Where constructive interference of two pulses is the addition of magnitudes of induvidual pulses and form a single puls of the constructed magnitude.

magnitude ( New pulse ) = magnitude (Pulse 1) + magnitude (Pulse 2)

Hence the two pulses will have Constructive interference

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Answer:

C

Explanation:

edge 22

Answer:

False. Not everything can turn into a black hole. The formation of a black hole requires a massive object, typically a star, to collapse under its own gravity. This collapse causes the object to become so dense that it creates a singularity, a point of infinite density at the center of the black hole, which is surrounded by an event horizon, the point of no return beyond which nothing, not even light, can escape. So, only objects with sufficient mass and gravity can become black holes.

Explanation:

The total potential energy associated with the jumper at the end of his fall is 90,000 J.

The given parameters;

The total potential energy associated with the jumper at the end of his fall is calculated as follows;

U = ¹/₂kx² + mgΔh

where;

Δh is the change in height after falling

U = ¹/₂(32)(75)²  + (51)(9.8)(0)

U = 90,000 J

Thus, the total potential energy associated with the jumper at the end of his fall is 90,000 J.

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(a) The tangential speed of the discus at the release is 15 m/s.

(b) The centripetal acceleration of the discus is 225 m/s².

(c) The centripetal force on the discus is 360 N.

The given parameters;

The tangential speed of the discus at the release is calculated as follows;

\(v = \omega r\\\\v = 15 \ rad/s \ \times 1 \ m\\\\v = 15 \ m/s\)

The centripetal acceleration of the discus is calculated as follows;

\(a_c = \frac{v^2}{r} \\\\a_c = \frac{15^2}{1} \\\\a _c = 225 \ m/s^2\)

The centripetal force on the discus is calculated as follows;

\(F_c = ma_c\\\\F_c = 1.6 \times 225\\\\F_c = 360 \ N\)

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The work done by the three students is 3,000 J.

The energy transferred in the process is 3,000 J.

W = Fd

The work done by the three students is calculated as follows;

W = 300 x 10

W = 3,000 J

The energy transferred in the process is determined by work energy theorem.

E = W

E = 3,000 J

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In the northern hemisphere, gyres rotate in the clockwise direction.

Therefore, the statement on question number 4 is false.

With 4.3 m/s velocity, is the cheetah running.

velocity= distance/time

distance=27.6 m

time=6.3 s

velocity=27.6 m/6.3 s

velocity=4.3 m/s

A vector number known as velocity describes "the pace at which an item changes its location." Imagine a person moving quickly, taking one stride ahead, one step back, and then beginning from the same place each time. A vector quantity is velocity. As a result, velocity is aware of direction. One must consider direction while calculating an object's velocity. Saying that an item has a velocity of 55 miles per hour is insufficient. The direction must be included in order to adequately characterize the object's velocity. Simply said, the velocity vector's direction corresponds to the motion of an item.

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Answer:

I think B but i'm not sure.

Explanation:

The ball stays in the air for a total of 1.5 + 0 = 1.5 seconds. The total time the ball stays in the air from the time it was thrown until it returns to the point of release can be calculated by considering the time it takes to reach the highest point and the time it takes to fall back down.

1. The total time the ball stays in the air from the time it was thrown until it returns to the point of release can be calculated by considering the time it takes to reach the highest point and the time it takes to fall back down.
Given that the ball reached the highest point after 3 seconds, we can assume that it took 1.5 seconds to reach the highest point. This is because the time taken to reach the highest point is half of the total time in the air.
To calculate the time it takes for the ball to fall back down, we can use the equation:
t = sqrt((2h) / g)
Where t is the time, h is the height, and g is the acceleration due to gravity (approximately 9.8 m/s^2). Since the ball has returned to the point of release, the height is zero.
Plugging in the values, we have:
t = sqrt((2 * 0) / 9.8) = 0 seconds
Therefore, the ball stays in the air for a total of 1.5 + 0 = 1.5 seconds.
2. The final velocity of the ball when it returns to the point of release can be determined by considering the initial velocity and the acceleration due to gravity.
When the ball is thrown upward, the initial velocity is 29.4 m/s. As the ball reaches the highest point, its velocity becomes zero. When the ball falls back down, it accelerates due to gravity and gains velocity.
The final velocity can be calculated using the equation:
v = u + gt
Where v is the final velocity, u is the initial velocity, g is the acceleration due to gravity, and t is the time taken to reach the highest point (1.5 seconds).
Plugging in the values, we have:
v = 29.4 + (9.8 * 1.5) = 29.4 + 14.7 = 44.1 m/s
Therefore, the final velocity of the ball when it returns to the point of release is 44.1 m/s.
To summarize, the ball stays in the air for 1.5 seconds from the time it was thrown until it returns to the point of release. The final velocity of the ball when it returns to the point of release is 44.1 m/s.

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Answer:

a) given that mass=0.6kg,distance of stretching from equilibrium position x=0.9m from new ton's second law,F=ma where a is acceleration of the body.Therefore,force on the spring -mass syste

Explanation:

hope it helps

The significance of a source in research is crucial as it determines the reliability and validity of the information presented. A credible source is important because it ensures that the information presented is accurate and trustworthy.

Using sources that are not credible or reliable can lead to the spread of misinformation, which can have practical consequences such as wrong decisions and actions based on incorrect information. Theoretical consequences could include flawed research or faulty arguments. It is important to consider the limitations, objections, or weaknesses of a source, as these can undermine its significance. This includes evaluating factors such as bias, sample size, and methodology used in the research.

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--The complete Question is, Identify the significance of the source—why is it important?—what practical or theoretical consequences might follow from the main point?—what limitations, objections, or weaknesses might be present that could serve to undermine the significance of the source?--