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2 years ago

6

A sub-woofer is a type of speaker which plays only the very low notes in a song or movie. Which of the following frequencies wou

ld you expect to be able to hear from a sub-woofer?
A. 10 Hz
B.25 Hz
C. 750 Hz
D. 1000 Hz

1 answer:

olchik [2.2K]2 years ago

8 0

The answer will be 25 Hz

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Consider a system to be one train car moving toward another train car at rest. When the trains collide, the two cars stick toget

pickupchik [31]

As per the question, the system consists of two cars.

The the masses of two cars are denoted as- $m_{1} \ and\ m_{2} \ respectively$

The two cars undergoes collision with each other. Here collision must be inelastic in nature.

Let the velocities of each car is denoted as- $v_{1} \ and\ v_{2} \ respectively$

It is given that masses of two cars and initial velocities-

$m_{1} =600 kg$ $v_{1} =4m/s$

$m_{2} = 400kg$ $v_{2} =0 m/s$

First we have to calculate the total momentum of the system before collision.

The momentum of a body is the product of its mass with velocity.

Momentum of car 1:

$p_{1} =m_{1} v_{1}$

$=600kg*4m/s$

$=2400\ kg\ m\ s^-1$

The momentum of car 2:

$p_{2} =m_{2} v_{2}$

$=400\ kg*0\ m/s$

$=\ 0\ kg\ m\ s^-1$

Now the total momentum of the system is :

$p_{1} +p_{2}$

$=[2400+0]\ kg\ m\ s^-1$

$=2400\ kg\ m\ s^-1$

Now we are asked to calculate the total momentum of the system after collision.

The basic condition in case of any type of collision is that it is in accordance with law of conservation of linear momentum.

Hence, the momentum will be conserved here.

It means the total momentum before collision must be equal to the total momentum after collision.

Hence, the correct answer to the question will be 2400 kg m/s.

8 0

3 years ago

Read 2 more answers

Einhorn and Finkle are in a convenience store together. For a while they talk about stealing hot dogs and deodorant, for they ar

dangina [55]

We can conclude that Einhorn decides not to steal according to the pre-conventional level where as Finkle decides per the conventional level according to Kohlberg's theory.

Explanation:

Kohlberg's theory is explained in three stages:

The pre-conventional stage where sense of moral is controlled externally by rules of authority figures such as parents and teachers.An action is viewed according to the results obtained after the act.
Conventional stage is when a person's morals are controlled by authority figures and their positive relation to the society norms.
Post-conventional level relies on a person's principles and values where some laws are seen as unjust.

In this case, Einhorn recognizes that if you steal, you might end up being caught and punished because it is not accepted by authority figures and could led to punishment. This is stage one. Finkle recognizes that stealing is unaccepted by the law and people in a society should avoid it.This is stage two.

We can conclude that Einhorn's decision not to steal is influenced by the pre-conventional level where as Finkle's by the conventional level according to Kohlberg's theory of moral development.

Learn More

Kohlberg's theory of moral development : brainly.com/question/8885213

Keywords: store, stealing,afraid, caught, punished, wrong, act, comparing, moral development, motivation, Kohlberg's theory

#LearnwithBrainly

8 0

3 years ago

Mass is not volume.<br> True<br> False

raketka [301]

The answer is false

6 0

2 years ago

Which one of the following is an example of a solution?

insens350 [35]

Answer:

it is maybe A but i'm not 100% sure

Explanation:

its the only one that is mixed

6 0

3 years ago

Gravity causes objects to be attracted to one another. This attraction keeps our feet firmly planted on the ground and causes th

melomori [17]

The units of G must be C. m³ / ( kg s² )

<h3>Further explanation</h3>

Newton's gravitational law states that the force of attraction between two objects can be formulated as follows:

$\large {\boxed {F = G \frac{m_1 ~ m_2}{R^2}} }$

<em>F = Gravitational Force ( Newton )</em>

<em>G = Gravitational Constant ( 6.67 × 10⁻¹¹ Nm² / kg² )</em>

<em>m = Object's Mass ( kg )</em>

<em>R = Distance Between Objects ( m )</em>

Let us now tackle the problem !

To find unit of Gravitational Constant can be carried out in the following way:

$F = G \frac{m_1 ~ m_2}{R^2}$

${[N]}= G\frac{{[kg]}{[kg]}}{{[m^2]}}$

${[kg ~ m / s^2]}= G \frac{{[kg^2]}}{{[m^2]}}$

$G = \frac{{[kg ~ m / s^2]}{[m^2]}} {{[kg^2]} }$

$G = \frac{{[kg ~ m^3 / s^2]}} {{[kg^2]} }$

$G = \frac{{[m^3 / s^2]}} {{[kg]} }$

$\boxed {G = \frac{{[m^3]}} {{[kg ~ s^2]} }}$

The unit of G must be $\large {\boxed {\frac{m^3} {kg ~ s^2 }}}$

<h3>Learn more</h3>

Impacts of Gravity : brainly.com/question/5330244
Effect of Earth’s Gravity on Objects : brainly.com/question/8844454
The Acceleration Due To Gravity : brainly.com/question/4189441

<h3>Answer details</h3>

Grade: High School

Subject: Physics

Chapter: Gravitational Fields

Keywords: Gravity , Unit , Magnitude , Attraction , Distance , Mass , Newton , Law , Gravitational , Constant

5 0

3 years ago

Read 2 more answers