energy in a food chain flows in ____________​

The reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

Given that the mass of a person is 60.0 kg and the elevator accelerates upwards with an acceleration of 4.90 m/s², we have to determine the reading on the scale.

Let F be the force exerted by the scale on the person. Then, by Newton's second law of motion, the net force acting on the person is Fnet= m * a

where m = 60.0 kg is the mass of the person and a = 4.90 m/s² is the acceleration of the elevator. Hence, the net force acting on the person is given by;

Fnet = 60.0 kg * 4.90 m/s²

Fnet = 294.0 N

Therefore, the scale reading is equal to the force exerted by the scale on the person. Since the elevator is accelerating upwards, the force exerted by the scale on the person is greater than the weight of the person, which is the force of gravity acting on the person.

The force of gravity acting on the person is given by;

Fg = m * g, where g = 9.81 m/s² is the acceleration due to gravity. Hence, the force of gravity acting on the person is given by;

Fg = 60.0 kg * 9.81 m/s²Fg = 588.6 N

Therefore, the scale reading is given by the sum of the force of gravity acting on the person and the net force acting on the person;

F = Fg + Fnet

F = 588.6 N + 294.0 N

F = 882.6 N

Thus, the reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

Learn more about acceleration at: https://brainly.com/question/25876659

#SPJ11

According to the question the speed of the skater's hands is 528 m/min.

To calculate the speed of the skater's hands, we can use the formula:

Speed = Circumference * Revolutions per minute

Given that the skater's hands are 140 cm apart and she spins at 120 rpm, we need to calculate the circumference of the circle formed by her hands.

The circumference of a circle is given by the formula:

Circumference = 2 * π * radius.

In this case, the radius is half the distance between the skater's hands, which is 140 cm / 2 = 70 cm.

Converting the radius to meters, we have 70 cm = 0.7 m.

Now we can calculate the circumference:

Circumference = 2 * π * 0.7 m = 4.4 m (rounded to one decimal place).

Finally, we can calculate the speed of the skater's hands:

Speed = Circumference * Revolutions per minute

     = 4.4 m * 120 rpm

     = 528 m/min.

Therefore, the speed of the skater's hands is 528 m/min.

To learn more about speed
https://brainly.com/question/27888149
#SPJ11

Answer:

4000 J

Explanation:

KE = (1/2)(m)(v^2)

KE = .5*500*(4^2)

KE = 4000 J

Answer:b

Explanation:

ANSWER:

1st option: 70 cm

STEP-BY-STEP EXPLANATION:

Given:

Force (F) = 5.73 E−1 N^

Electrical charge 1 (q1) = 1.2 E−5 C

Electrical charge 2 (q2) = 2.5 E−6 C

k = 8.99 E9 N*m2/C2

We can calculate the distance between both charges with the help of Coulumb's law, just like this:

We substitute and solve for the distance, just like this:

The distance is 70 centimeters

Answer: 853.88m

Explanation:

The 200 calorie donut is really 200 kilocalories or 200000 calories. Each calorie is 4.184 Joules. Therefore, the amount of energy the donut gives the student is 836800 Joules. In order to find the height (displacement) the student would have to climb, use W=Fd or work = force*displacement. We know the work and we can find the force easily with mg. 100kg*9.8m/s^2 = 980N. d = W/F. Therefore, d = 836800J/980N, or 853.88m.

Answer: The correct option is C (The committee who insures ethical treatment of research participants)

Explanation:

The institute Review Board ( IRB) is a committee that reviews research that involves human beings and approves it once it's of ethical standard. This committee is usually made up of scholars that arefrom various departments who are mandated to review proposals to ensure that they comply with ethical guidelines and write a summary of proposed risks to subjects.

The primary importance of institute Review board is to protect the rights and welfare of human research subjects and to ensure that appropriate steps are taken to protect the rights and welfare of humans participating as subjects in the research, both in advance and by periodic review,

Answer:

c. 80%

Explanation:

Given;

load raised by the machine, L = 360 N

distance through which the load was raised, d = 0.2 m

effort applied, E = 50 N

distance moved by the effort, e = 1.8 m

The efficiency of the machine is calculated as follows;

\(Efficiency = \frac{ 0utput \ work }{1nput \ work} \times 100\% \\\\Efficiency = \frac{Load \ \times \ distance \ moved \ by \ load }{Efort \ \times \ distance \ moved \ by \ effort} \times 100\%\\\\Efficiency = \frac{360 \times 0.2}{50 \times 1.8} \times 100\%\\\\Efficiency =80\%\)

Therefore, the efficiency of the machine is 80%

Answer:

Explanation:

The simultaneous expansion and contraction of the layers should nonstick even the most stubborn glassware!!

A neutral stimulus will turn into a conditioned stimulus (CS) and cause a conditioned response (CR) that is comparable to the initial unconditioned response if it is combined with an unconditioned stimulus (US) that has already caused an unconditioned response (UR).

A neutral stimulus is one that first merely directs attention and doesn't elicit any specific responses. When coupled with an unconditioned stimulus in classical conditioning, the neutral stimulus becomes a conditioned stimulus. The neutral stimulus will also elicit a response, known as a conditioned response, with repeated presentations of both the neutral stimulus and the unconditioned stimulus.

So, CR i.e., conditioned response is after learning while NS i.e.,  Neutral Stimulus is before learning.

To get more information about Neutral Stimulus :

https://brainly.com/question/20573834

#SPJ1

The refrigerator's coefficient of performance is 1.5.

To find the refrigerator's coefficient of performance, we'll use the given information: it takes in 20 J of work and exhausts 50 J of heat.

The coefficient of performance (COP) is the ratio of the useful heat transfer to the work input. In the case of a refrigerator, the useful heat transfer is the amount of heat removed from the refrigerated space (Q_c). The work input is the work done on the refrigerator (W).

COP = Q_c / W

We know that the refrigerator takes in 20 J of work (W = 20 J) and exhausts 50 J of heat (Q_h = 50 J). In a refrigerator, the heat removed from the refrigerated space (Q_c) can be found by subtracting the heat exhausted from the work input:

Q_c = Q_h - W
Q_c = 50 J - 20 J
Q_c = 30 J

Now we can find the coefficient of performance:

COP = Q_c / W
COP = 30 J / 20 J
COP = 1.5

So, the refrigerator's coefficient of performance is 1.5.

Learn more about "heat": https://brainly.com/question/21406849

#SPJ11

True, if Bernoulli's equation is divided by g_c, then each term becomes fluid head and has the units of length.

Bernoulli equation, or the incompressible steady flow energy equation, is considered one of the most well-known equations in physics ( fluid mechanics) and it explains the conservation of mechanical work-energy. The equation was published in 1738 by Daniel Bernoulli (a Swiss physicist) to help us understand fluid flow

By dividing each term by the gravitational constant (g_c), the equation expresses the energy in terms of fluid head, which allows for easier comparison and interpretation of the various forms of energy in the fluid system.

To know more about equation refer https://brainly.com/question/2005046

#SPJ11

An electroscope is used to detect the presence of an electric charge. It consists of two metal plates or leaves that are suspended from an insulating support.

When an electric charge is brought near the electroscope, the leaves will diverge due to the electrostatic force of repulsion between them.

The extent of the divergence will depend on the magnitude of the charge. However, it is not possible to determine the sign (positive or negative) of the charge from an electroscope alone.

An electroscope is a device used to detect the presence of an electric charge. To tell if an electroscope has an electric charge, you can observe the behavior of the metal leaves on the electroscope.

When an electroscope has an electric charge, the metal leaves on the electroscope will spread apart. This is because the same charge on the metal leaves repels each other, causing them to move away.

It is not possible to tell from an electroscope alone what kind of charge it has. To determine the type of charge, you will need to use another device to induce a charge on the electroscope and observe the behavior of the leaves. If the leaves move away from each other, the electroscope has a positive charge. If the leaves move towards each other, the electroscope has a negative charge.

to know more about magnitude click here:

https://brainly.com/question/30015985

#SPJ4

Answer:

I think its C and D

Explanation:Force is like a energy that moves stuff. :)

Answer:

elastic energy

Explanation:

hope it helps you

The diameter of the cylinder is 2.49 meters if the cylinder is 4872 N and the cylinder exerts a pressure of 812 N/m2. on the ground.

First, we need to find the area of the base of the cylinder that is in contact with the ground. To do this, we can use the formula for pressure: Pressure = Force/Area. Rearrange the formula to solve for Area: Area = Force/Pressure.
Given:
Force exerted by the cylinder (N) = 4872 N
Pressure exerted by the cylinder (N/m^{2}) = 812 N/m^{2}
Calculate the Area:
Area = Force/Pressure = 4872 N / 812 N/m^{2} = 6 m^{2}
Now, we know the area of the base of the cylinder. Since the base is a circle, we can use the formula for the area of a circle: Area = π * (diameter/2)^{2}. Rearrange the formula to solve for diameter: Diameter = 2 * √(Area/π).
Calculate the Diameter:
Diameter = 2 * √(6 m^2/π) ≈ 2.49 meters
The diameter of the cylinder, to 2 decimal places, is approximately 2.49 meters.

For more information on pressure kindly visit to

https://brainly.com/question/31771629

#SPJ11

At the point when waves change starting with one medium then onto the next, the frequency of the wave changes relying upon the properties of the two mediums.

Infrared to Radio waves: Frequency increments

Radio waves to Microwaves: Frequency diminishes

Bright to Gamma beams: Frequency diminishes

Gamma beams to X-beams: Frequency diminishes

Infrared to Bright: Frequency diminishes

Yellow to blue: Frequency diminishes

Green to orange: Frequency increments

Infrared to red: Frequency increments

Bright to violet: Frequency diminishes

At the point when waves change starting with one medium then onto the next, the frequency might change relying upon the refractive lists of the two media.

Assuming the refractive list of the subsequent medium is more noteworthy than the first, then, at that point, the frequency will diminish. In the event that the refractive record of the subsequent medium is lower than the first, then, at that point, the frequency will increment.

The spectrum of all EM radiation is known as the electromagnetic (EM) spectrum. The visible light from your house's lamp and the radio waves from a radio station are both examples of electromagnetic radiation, which is energy that moves and spreads out.

Learn more about electromagnetic spectrum:

brainly.com/question/2261239

#SPJ4

According to the question the answer will be, at t = π/2, the spring's displacement is -10 cm, indicating that the weight has moved 10 cm in the negative direction from its equilibrium position.

The spring's displacement when t = π/2 is -10 cm.

When we substitute t = π/2 into the equation x = 10cos(t), we get:x = 10cos(π/2)

Using the trigonometric identity cos(π/2) = 0, we can calculate the spring's displacement:

x = 10 * 0

x = 0 cm

Hence, at t = π/2, the spring's displacement is -10 cm, indicating that the weight has moved 10 cm in the negative direction from its equilibrium position.

To learn more about equilibrium position

https://brainly.com/question/31609407

#SPJ11

The displacement of a spring involved in simple harmonic motion, given by the equation x=10cos(t), results in a displacement of 0 cm when time t=π/2.

The displacement of the spring in the given scenario can be calculated using the equation x=10cos(t), where t is time and x is the displacement of the spring. Given that the time (t) is π/2 (or pi/2), we can substitute this value into the equation. Since the cosine of π/2 is 0, the equation simplifies to x=10*0, therefore the displacement of the spring when t=π/2 is 0 cm.

The scenario described is an example of simple harmonic motion, where an object (such as a mass attached to a spring) oscillates back and forth about an equilibrium position based on a restoring force that is directly proportional to the displacement from equilibrium.

https://brainly.com/question/35900466

#SPJ11

Answer:

Explanation:

You can use a one-dimensional physics equation to find the horizontal distance:

Δx = \(v_{0}t+\frac{1}{2}at^2\) where v0 is the initial velocity (30 m/s), t is time, and a is accleration. There is 0 acceleration in the horizontal dimension so the equation becomes

Δx\(=v_{0}t\) which is a fancy and meant-to-be-intimidating version of "distance - rate times time". The delta x is the distance traveled and our known, v0 is the initial velocity, and t is time. We have the rate and the time:

Δx = \((30)2_\) which gives us the horizontal distance of 60 meters

Answer: h = u^2 / 2g

Explanation:

Given the following :

Horizontal Velocity of projection= u

If :

magnitude of horizontal = magnitude of vertical Displacement

u = u

Minimum height of tower (h) =?

Horizontal Velocity = u

Gravity potential energy = mgh - - - (1)

Kinetic energy = 1/2 mu^2 - - - (2)

m = mass

Where u = magnitude of velocity

g = acceleration due to gravity

h = height

Equating (1) and (2)

mgh = 1/2 mu^2

gh = 1/2 mu^2

2gh = u^2

u = √2gh

Vertical component of Velocity 'v' will be:

u = √2gh

u = √2 × g × h

Square both sides

u^2 = 2 × g × h

h = u^2 / 2g

The head-to-tail method consists of changing the subtraction of vectors into an addition, where the second vector in the addition will be the opposite vector of the second vector in the subraction:

If vector b is <1, 4>, vector -b is <-1, -4> (we just need to change every signal).

Now, let's draw vector 'a', and in the head of vector 'a' let's start drawing the tail of vector b:

The red vector, which is the sum of 'a' and '-b', is created at the tail of 'a' and finishes at the head of '-b'.

The initial point is (0, 0), and the terminal point is (-4, -9)

Answer:

\(1.2\; {\rm N}\), assuming that all other forces on this crab were balanced.

Explanation:

The impulse \(J\) on an object is equal to the change in momentum \(\Delta p\). In other words:

\(J = \Delta p\).

If the mass \(m\) of the object stays the same (as in the case of this question), the change in momentum can be rewritten as:

\(J = \Delta p = m\, \Delta v\), where \(\Delta v\) is the change in velocity.

Impulse is also equal to the net force on the object \(F_{\text{net}}\) times the duration \(\Delta t\) over which the force is applied:

\(J = F_{\text{net}}\, \Delta t\).

Equate the two expressions for \(J\) to obtain:

\(F_{\text{net}}\, \Delta t = m\, \Delta v\).

In this question:

Rearrange \(F_{\text{net}}\, \Delta t = m\, \Delta v\) and solve for the net force \(F_{\text{net}}\):

\(\begin{aligned}F_{\text{net}} &= \frac{m\, \Delta v}{\Delta t} \\ &= \frac{(3\; {\rm kg})\, (2\; {\rm m\cdot s^{-1}})}{5\; {\rm s}} \\ &= 1.2\; {\rm kg \cdot m\cdot s^{-2}} \\ &= 1.2\; {\rm N}\end{aligned}\).

Assuming that all other forces on this crab are balanced, the net force on the crab would be equal to the force from the tide. Hence, the tide would have pushed the crab with a force of \(1.2\; {\rm N}\).

Answer:

False.

Explanation:

Human diversity means differences among people. Therefore, it's each of us in our rich and infinite indistinguishable features; this is basically the fundamental building block of culture. For example, a doctor might enjoy watching football and educational documentary programs while another enjoys listening to music and watching thriller movies.

Culture can be defined as the general way of life of a group of people living together in a particular location or society.

Basically, culture comprises of beliefs, values, behaviors, language, dressing, cuisine, music, symbols, arts, social habits, knowledge, customs, laws pertaining to a particular group of people living together in a society.

This ultimately implies that, culture are acquired and passed from one generation to another.

A cultural trait can be defined as the smallest characteristics of human activity (actions) that is mainly acquired socially and transmitted from one generation to another through various modes of communication. Thus, these unique behavioral informations or characteristics and beliefs acquired by people socially are transmitted from one individual or group of people to another.

Answer:

c - the frequency of the waves decreases

The total centripetal force is 50N

Given

mass of the ball= 1kg

speed of the ball = 10m/s

Radius = 2m

we know that

centripetal force = F =\(\frac {mv^2}{r}\)

F = \(\frac {1 \times {10}^2}{2}\) = 50 N

To learn more about centripetal force with the given link

https://brainly.com/question/11324711

#SPJ4

Question:

a 1 kg ball is confined to move on a. vertical circle of a radius of 2 meters. There is no friction between the bead and the circular track. The bead has a speed of 10 m/s when at the top of the circle at point A, find the total centripetal force.

Answer:

The force applied to make the object move

Answer:

input work = output work

E * ED = L* LD

Explanation:

The principle of lever is that input work is always equal to output work .

Answer:

5738929292

Explanation:

simple math

The wavelength of the photon with mass m=9.11×10⁻³¹kg and the transition taking place between n=6 and the n=7 state is λ=570.4nm.

The photon or light has dual nature of light(i.e. the light has matter and wave nature). The wavelength of the wave is defined as the distance between two crests and two waves.

From the given, The wavelength of the light makes the electron pumps form the nth state to (n+1)th state.

mass of the electron, m=9.11×10⁻³¹kg

nth state = 6

n+1 state =7

speed of light(c) = 3×10⁸ m/s

L = 1.5×10⁻⁹

Wavelength(λ) = 4mcL²/(2n+1)π(h/2π), where h is the Planck's constant and is equal to 6.626×10⁻³⁴.

λ = 4mcL²/(2n+1)π(h/2π)

  = 4×9.11×10⁻³¹×3×10⁸ ×(1.5×10⁻⁹)² / (2×6+1)π( 6.626×10⁻³⁴/2π)

 = 4×9.11×10⁻³¹×3×10⁸ ×(1.5×10⁻⁹)² / (2×6+1)×3.14( 6.626×10⁻³⁴/6.28)

 = 5.704×10⁻⁷m

 =570.4 ×10⁻⁹m

Thus, the wavelength of the photon is 570.4nm.

To learn more about wavelength:

https://brainly.com/question/31143857

#SPJ4

1. When a neutral metal sphere is charged by contact with a positively charged glass rod, the sphere loses electrons.

2. A glass rod is given a positive charge by rubbing it with a silk cloth.

The process of charging by contact occurs when a charged object is placed in contact with a neutral object, causing the neutral object to become charged. In this case, a positively charged glass rod is brought into contact with a neutral metal sphere, causing electrons to move from the sphere to the rod. As a result, the metal sphere loses electrons and becomes positively charged. On the other hand, a glass rod is given a positive charge by rubbing it with a silk cloth. This is known as charging by friction, and it occurs when electrons are transferred from one object to another as a result of friction between the two objects. In this case, electrons are transferred from the silk cloth to the glass rod, causing the rod to become positively charged.

Know more about electrons

https://brainly.com/question/860094

#SPJ11