Bergen

2020-11-10

To describe: The reason for the name "gravity model".

tafzijdeq

Skilled2020-11-11Added 92 answers

Given: The number of daily phone calls between two cities varies jointly as their populations and varies inversely as the square of the distance between them. The above stated model is called as gravity model.

Definition used:

(1) Joint Variation:Joint variation is a variation in which a variable varies direcly as the product of two or more other variables. Thus, the equation y = kxz, is read y varies jointly as x and z.

(2) Inverse Variation: If a situation is described by an equation in the form

Description:

Let the average number of daily phone calls is represented as C and population of two cities are

The distance between two cities be represented as d.

From definition (1), the given "The C between the two cities varies jointly as the product of their population" can be expressed as,

Similarly by the definition (2) the given "The C varies inversely as the as the square of distance" can be expressed as,

Combine the equation (1) and equation (2) as follows.

From equation (3), the given model can be expressed as

In general, the newton's formula for gravitation is

The above formula indicates the gravitational force between two objects in the universe. On comparing the gravitational formula with given model, it is observed to be in similar form of joint variation.

Thus, the given model is called as gravity model.

The product of the ages, in years, of three (3) teenagers os 4590. None of the have the sane age. What are the ages of the teenagers???

Use the row of numbers shown below to generate 12 random numbers between 01 and 99

78038 18022 84755 23146 12720 70910 49732 79606

Starting at the beginning of the row, what are the first 12 numbers between 01 and 99 in the sample?How many different 10 letter words (real or imaginary) can be formed from the following letters

H,T,G,B,X,X,T,L,N,J.Is every straight line the graph of a function?

For the 1s orbital of the Hydrogen atom, the radial wave function is given as: $R(r)=\frac{1}{\sqrt{\pi}}(\frac{1}{{a}_{O}}{)}^{\frac{3}{2}}{e}^{\frac{-r}{{a}_{O}}}$ (Where ${a}_{O}=0.529$ ∘A)

The ratio of radial probability density of finding an electron at $r={a}_{O}$ to the radial probability density of finding an electron at the nucleus is given as ($x.{e}^{-y}$). Calculate the value of (x+y).Find the sets $A$ and $B$ if $\frac{A}{B}=\left(1,5,7,8\right),\frac{B}{A}=\left(2,10\right)$ and $A\cap B=\left(3,6,9\right)$. Are they unique?

What are the characteristics of a good hypothesis?

If x is 60% of y, find $\frac{x}{y-x}$.

A)$\frac{1}{2}$

B)$\frac{3}{2}$

C)$\frac{7}{2}$

D)$\frac{5}{2}$The numbers of significant figures in $9.1\times {10}^{-31}kg$ are:

A)Two

B)Three

C)Ten

D)Thirty oneWhat is positive acceleration?

Is power scalar or vector?

What is the five-step process for hypothesis testing?

How to calculate Type 1 error and Type 2 error probabilities?

How long will it take to drive 450 km if you are driving at a speed of 50 km per hour?

1) 9 Hours

2) 3.5 Hours

3) 6 Hours

4) 12.5 HoursWhat is the square root of 106?