fit a model relating change in refractive error to baseline refractive error and baseline curvature

Answer:

The correct answer is - 47 years.

Explanation:

The doubling time of the population growth depends on the rate of population growth. The formula for the calculation of the doubling time is :

time (t) = log(N/N0)/r (time)

here,

N0 (initial population) = The population at time t = 0.

N (future population) = The population at time t.

r (rate) = The rate of population change as a function of t

by the formula

t = log (2/1)/0.015

t =  46.666 years or 47 years approx.

The population of each country will become double in 47 years. hence option (A) is correct.

Given data:

The population of Dominican republic is, n = 10.7 million.

The growth rate of Dominican republic is, p = 1.5 %.

The population of Paraguay is, n' = 6.0 million.

The growth rate of Paraguay is, p' = 1.5 %.

The doubling time of the population growth depends on the rate of population growth. The formula for the calculation of the doubling time is given as,

\(t = \dfrac{ln\dfrac{n}{n_{0}}}{p}\)

Here,

\(n\) is the final population and  \(n_{0}\) is the initial population and for doubling the value in future, \(n = 2 \times n_{0}\).

Solving as,

\(t = \dfrac{ln\dfrac{2\times n_{0}}{n_{0}}}{1.5/100}\\\\t \approx 47 \;\rm years\)

Thus, we can conclude the population of each country will become double in 47 years.

Learn more about the population model here:

https://brainly.com/question/24172878

Answer:

This question appear incomplete

Explanation:

This question appear incomplete. However, the significance/functions of the "instruments" mentioned (in the completed question) can be predicted since these "instruments" generally have specialized function.

A thermometer is used to determine the temperature of a substance or an object. The electric heater uses electricity to produce heat (which can be utilized for different purposes). The power supply is used to supply electricity for instruments/appliances that may require electricity to function.

Answer:

I think it's how far out the water goes from the beach before the tsunami because before tsunami usually the water goes back way behind the tide before tsunami and that tells them everything they need I think

Answer:

A disease is a disorder in the function of the human body where as infectious agents are organisms that cause diseases

Answer:

its 1 and 5, A and E

Explanation:

The frequency range of electromagnetic waves of X-ray is 3 ×10¹⁶ Hz to  3 ×10¹⁹ Hz. The wavelength range of electromagnetic waves of X-ray is  0.01 nm t0 10 nm.

The electromagnetic spectrum of electromagnetic waves can be described as the range of frequencies of electromagnetic radiation and its wavelengths and photon energies. The electromagnetic spectrum have range from one Hertz to above 10²⁵ Hertz.

The wavelength of electromagnetic radiation lies in between 380 to 760 nm and is detected by the human eye and characterized as visible light.

Electromagnetic waves of each frequency band are known by different names; starting at the low frequency (long wavelength) end of the spectrum these are radio waves, microwaves, infrared (IR), visible light, UV, X-rays, and gamma rays at the high-frequency (short wavelength) end.

Learn more about electromagnetic spectrum, here:

brainly.com/question/15576247

#SPJ1

The work done by the person operating the jack is 4,800 J

Efficiency is described as the potential to perform something with the least quantity of wasted time, cash, and attempt or competency in performance. Effectiveness is described because the diploma to which some thing is successful in producing a preferred result; achievement.

calculation:-

work input = (1200 J)/(0.25)

= 4800 J.

There are numerous styles of performance, consisting of allocative and effective performance, technical efficiency, 'X' efficiency, dynamic performance and social efficiency.

The prime focus of performance is for customers to get the goods and offerings they want at the bottom possible resource price. Inside the have a look at of economics, the dreams of efficiency and equity are frequently in warfare with each other.

Learn more about Efficiency here:-https://brainly.com/question/27870797

#SPJ1

Answer:

artist

Explanation:

Answer:

I'm pretty sure the answer is broken

Explanation:

Answer:

5/8 times that on the surface of the earth or 2.41 × 10^23 kg

Answer:

Explanation:

\(m =800kg\\v = 15\\\\K.E = \frac{1}{2}mv^2\\ K.E= \frac{1}{2} \times 800\times 15^2\\= 400 \times 225\\= 90000 joules\\= 90 kilojoules\)

Answer:

B

Explanation:

Answer:

To calculate the resonant frequency and the wavelength in the ear canal, the formulas for closed cavity resonances can be used:

a. First resonant frequency:

The resonant frequency f n can be calculated from the length l of the ear canal and the speed of sound v as follows:

fn = nv / 4l

where n is an integer representing the number of resonances. For the first resonance (n = 1), the resonant frequency can be calculated as:

f 1 = v / 4l = (340 m/s) / (4 * 2.5 cm) = 272,000 Hz

b. Wavelength at second resonance:

The wavelength λ of the resonant frequency can be calculated from the frequency and speed of sound:

λ = v/f

For the second resonance (n = 2), the resonant frequency is:

f 2 = 2v / 4l = 2 * 272,000 Hz = 544,000 Hz

and the wavelength can be calculated as:

λ 2 = v / f 2 = (340 m/s) / 544,000 Hz = 0.00063 m = 6.3 mm

These calculations are approximate and may vary depending on the shape and acoustic properties of the ear canal.

Answer:

the north and south pole

Explanation:

this should be the correct answer

ETo determine the acceleration of the crate, we need to resolve the applied force into its horizontal and vertical components. The horizontal component of the force will contribute to the acceleration, while the vertical component will not affect the motion of the crate on a frictionless surface.
Given:
Mass of the crate (m) = 40 kg
Magnitude of the applied force (F) = 140 N
Angle of the force with the horizontal (θ) = 30°

To find the horizontal component of the force (F_horizontal), we can use trigonometry:
F_horizontal = F * cos(θ)
F_horizontal = 140 N * cos(30°)
F_horizontal = 140 N * √3/2
F_horizontal = 140 N * 0.866
F_horizontal ≈ 121.24 N
Since there is no friction or vertical forces acting on the crate, the horizontal component of the applied force will be responsible for the acceleration.
Using Newton's second law of motion, which states that the force applied to an object is equal to the mass of the object multiplied by its acceleration (F = m * a), we can calculate the acceleration (a).
a = F_horizontal / m
a = 121.24 N / 40 kg
a ≈ 3.03 m/s²
Therefore, the acceleration of the crate is approximately 3.03 m/s².

To learn more about, Acceleration, click here, https://brainly.com/question/30827337

Answer:

rotation about sphere A 0.02 kgm^2

rotation about sphere C 0.008 kgm^2

Explanation:

The moment of inertia, when rotation is about sphere A, is  0.02 kg·m².

The moment of inertia, when rotation is about sphere C, is  0.008 kg·m².

According to the definition of inertia, matter has the ability to remain at rest or to move uniformly in a single direction unless applied with an external force.

Given parameters:

Mass of each sphere; m = 0.10 kg.

The distance between spheres A  and sphere C is ; r = 0.20 m.

Let the radius of each sphere is negligible and distance between sphere C and unleveled sphere is equals to  distance between spheres A  and sphere C is ; r = 0.20 m.

So,  the moment of inertia in the given instances, when rotation is about sphere A, is = mr² + m(2r)²

= 5 mr²

= 5 × 0.10 × 0.20² kg·m²

= 0.02 kg·m².

And  the moment of inertia, when rotation is about sphere C, is  = mr² + mr²

= 2mr²

= 2 × 0.10 × 0.20² kg·m².

= 0.008 kg·m².

Hence, the moment of inertia of the system during rotation about sphere A and rotation about sphere C respectively 0.02 kg·m² and 0.008 kg·m².

Learn more about inertia here:

https://brainly.com/question/3268780

#SPJ2

Answer:

The  time taken is  \(t = 32.5 \ s\)

Explanation:

From the question we are told that

   The  speed  of  first car is  \(v_1 = 66.7 \ km/h = 18.3 \ m/s\)

    The  speed  of  second car is \(v_2 = 52.7 \ km/h = 14.64 \ m/s\)

   The  initial distance of separation is  \(d = 119 \ m\)

The distance covered by first car is mathematically represented as

     \(d_t = d_i + d_f\)

Here  \(d_i\) is the initial distance which is  0 m/s

  and  \(d_f\)  is the final distance covered which is  evaluated as \(d_f = v_1 * t\)

So

     \(d_t = 0 \ m/s + (v_1 * t )\)

     \(d_t = 0 \ m/s + (18.3 * t )\)

The distance covered by second  car is mathematically represented as

     \(d_t = d_i + d_f\)

Here  \(d_i\) is the initial distance which is  119 m

  and  \(d_f\)  is the final distance covered which is  evaluated as \(d_f = v_2* t\)

       \(d_t = 119 + 14.64 * t\)

Given that the two car are now in the same position we have that

    \(119 + 14.64 * t = 0 + (18.3 * t )\)

   \(t = 32.5 \ s\)

Answer:

an isolated system initially has 50 J of energy, what happens to that amount of energy over time? The total amount of energy decreases, and it cannot be converted into other forms of energy. The total amount of energy stays the same, but it can be converted into other forms of energy. The total amount of energy increases, but it can be The total amount of energy stays the same, but it can be converted into other forms of energy. This is known as the law of conservation of energy, which states that energy cannot be created or destroyed, only transformed from one form to another. So even though the initial 50 J of energy may be converted into other forms of energy over time, the total amount of energy in the isolated system will remain constant.

srryyy I needed pooointss

The motion being described is linear motion, and since it has direction, it is a vector quantity.

A linear motion is a style of motion in which the object's movement is inversely proportional to its speed and duration of motion.

This type of motion also happens in a straight line.

The following is the formula for final velocity in a linear type of motion:

v = u + at

where;

V is the object's final speed or moving rate.

u is an object's initial speed, and a represents its acceleration.

t is the object's motion in time.

Our equation is formed by the supplied statement as follows:

v = u + at

15 m/s = 10 m/s + 60a

Thus, the final velocity formula, which is a vector quantity, is shown by the equation above.

Learn more about final velocity here: brainly.com/question/25905661

#SPJ4

Answer:

Instead, we see the Moon because of the Sun's light reflects back to our eyes. In fact, the Moon reflects so much of the Sun's light that it's the second brightest object in the sky after the Sun. ... These objects — other planets and stars — can usually only be seen at night when the Sun's light doesn't outshine them.

MARK ME AS A BRAINLIEST

The focal length and image height of the concave mirror is 24cm and 4.5cm respectively. So, the correct options are (C) and (E) respectively.

A concave mirror is defined as a reflective surface that is curved inward and away from the light source to reflect light inward at a focal point. Convex mirror is the image formed by a concave mirror shows different types of image depending on the distance between the object and the mirror.

The focal length of the mirror is :

\(1/f = 1/d_o + 1/d_i\)

where, \(d_o\) and \(d_i\) are distances of object and image respectively

For normal mirror\(d_o = d_i = 8\)

For concave mirror \(d_o = 8; d_i = 12\)

1/f = 1/8 - 1/12 (following sign conventions)

f = 24cm

object height = 3cm

Height of the image is 3*12/8 = 4.5cm

Thus, the focal length and image height of the concave mirror is 24cm and 4.5cm respectively. So, the correct options are (C) and (E) respectively.

Learn more about Concave mirror, here:

https://brainly.com/question/3555871

#SPJ1

Answer:

When a body is moving on a circle it is accelerating because centripetal acceleration is always acting on it towards the center.

Please see the attached picture...

From the above diagram,we can say the acceleration is always acting on the body when it moves in a circle.

Hope this helps.......

Good luck on your assignment.......

Answer:

an object moving in uniform circular motion is moving in a circle with a uniform or constant speed. The velocity vector is constant in magnitude but changing in direction. Because the speed is constant for such a motion, many students have the misconception that there is no acceleration. "After all," they might say, "if I were driving a car in a circle at a constant speed of 20 mi/hr, then the speed is neither decreasing nor increasing; therefore there must not be an acceleration." At the center of this common student misconception is the wrong belief that acceleration has to do with speed and not with velocity. But the fact is that an accelerating object is an object that is changing its velocity. And since velocity is a vector that has both magnitude and direction, a change in either the magnitude or the direction constitutes a change in the velocity. For this reason, it can be safely concluded that an object moving in a circle at constant speed is indeed accelerating. It is accelerating because the direction of the velocity vector is changing.

Explanation: hopes it help u

Answer:

- 5.32 m/s^2

Explanation:

vo = original velocity = 34.5  m/s

vf = final velocity = 0

t = 6.48 s

vf = vo  + at

0 = 34.5 + a (6.48)

a = - 5.32 m/s^2    <=====NOTE:  a negative acceleration is a DEcceleration

Answer:

As light travels in a straight line at a constant speed, it's acceleration is 0 m/s².

There is no rate of change of speed, so there is no acceleration.