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3 years ago

What is the difference between the contagion theory and the convergence

1 answer:

4 0

Answer: Contagion theory states that crowds cause people to act in a certain way; convergence theory says the opposite, claiming that people who wish to act in a certain way come together to form crowds.

Explanation: Its C

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Which of the following illustrates an increase in potential energy? Group of answer choices a wind-up toy winding down a person

horrorfan [7]

Answer:

A person climbs a set of stairs

Explanation:

Potential energy is said to be possessed by an object due to its position. As the height from the ground level increase, the potential energy increases. It is calculated by the below formula as :

P = mgh

Out of the given options, the option that illustrates an increase in potential energy is option (b) i.e. a person climbs a set of stairs. As he steps one stair, its position from ground increases. It means its potential energy increases.

7 0

3 years ago

A ray in air hits the surface of water at 41.0 deg. At what angle does it travel in the water?

otez555 [7]

Answer:

r = 29.53 degrees

Explanation:

Given that,

Angle of incidence, $i=41^{\circ}$

We need to find the angle at which it will travel in the water. The refractive index of water is 1.33 and refractive index of air is 1. Using Snell's law as :

$n_1\sin i=n_2\sin r$

r is the angle of refraction

$\sin r=\dfrac{n_1}{n_2}\sin i\\\\\sin r=\dfrac{1}{1.33}\times \sin (41) \\\\r=\sin^{-1}(0.493)\\\\r=29.53^{\circ}$

So, the ray will travel at an angle of 29.53 degrees in the water.

4 0

4 years ago

Suppose an atom has a mass number of 23. What does this mean?

lawyer [7]

The number of protons in the nucleus dose not equal the number of neutrons.

6 0

3 years ago

Read 2 more answers

What are the 2 types of ions.

Alina [70]

Answer:

Anions have more electrons than protons and so have a net negative charge. Cations have more protons than electrons and so have a net positive charge. Zwitterions are neutral and have both positive and negative charges at different locations throughout the molecule.

Explanation:

4 0

3 years ago

Jose pushes a cart with a force of 12 N to the right. Lucy also pushes the cart with a force of 5 N to the right. John pushes th

cricket20 [7]

So, <u>their net force on the cart is 10 N to the right</u>.

<h3>Introduction</h3>

Hi ! Here, I will help you with the net forces (results of forces) acting on a two-dimensional area and in opposite directions. Steps that can be taken are as follows :

Determine where the force will go, the important thing is that you are consistent until the end.
Count the values of the force acting, the force against the direction of your mind in number 1 is given a negative sign.
Look at the results, if it's marked (-), then choose the opposite direction from your thoughts at number 1.

The equation for calculating the net force from this two-dimensional straight line is as follows:

$\boxed{\sf{\bold{\sum F = F_1 + F_2 + ... + F_n}}}$

With the following condition :

$\sf{\sum F}$ = net force (N)
$\sf{F_1}$ = first force and its direction (N)
$\sf{F_2}$ = second force and its direction (N)
$\sf{... + F_n}$ = You can add up the force values as many times as the question (N).

<h3>Problem Solving</h3>

We know that :

In my mind, I determined that the force will go to the right. So :

$\sf{F_1}$ = Jose's force = 12 N >> Because he already walk to the right.
$\sf{F_2}$ = Lucy's force = 5 N >> Because she already walk to the right.
$\sf{F_3}$ = John's force = -7 N >> Because he is walked to the left.

What was asked :

$\sf{\sum F}$ = net force = ... N

Step by step :

$\sf{\sum F = F_1 + F_2 + F_3}$

$\sf{\sum F = 12 + 5 + (-7)}$

$\sf{\sum F = 17 - 7}$

$\boxed{\sf{\sum F = 10 \: N \: to \: the \: right}}$

<h3>Conclusion</h3>

The movement of the cart is to the right because the net force value that I calculated is not opposite (with negative sign) to the right direction. So, their net force on the cart is 10 N to the right.

5 0

2 years ago