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3 years ago

6

Which of the following is not a

1 answer:

marissa [1.9K]3 years ago

6 0

Answer:

polarization

Explanation:

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To illustrate the use of a multistage rocket consider the following:

garri49 [273]

Answer:

a

$v_f = 0.916 v_{ex}$

b

$v_f = 1.05 v_{ex}$

Explanation:

Considering question a

From the question we are told that

The mass of the rocket is $m_o$

The mass of the fuel which is in the rocket is m = 0.6 M

Generally given that the rocket burns all it fuel in a single stage , the final velocity of the rocket is mathematically represented as

$v_f = v_{ex} ln [\frac{m_o}{m_k} ]$

Here $m_k$ is the mass of the rocket without fuel which is mathematically evaluated as

$m_k = m_o- m$

=> $m_k = m_o -0.6m_o$

=> $m_k = [1- 0.6] m_o$

=> $v_f = v_{ex} ln [\frac{m_o}{[1 - 0.6]m_o} ]$

=> $v_f = 0.916 v_{ex}$

Considering question b

From the question we are told that

The mass of the fuel it burn at the first stage is $m = 0.3 m_o$

The mass of the first stage fuel tank $m_1 = 0.1 m_o$

The mass of the fuel at the second stage is $m_f = 0.3m_o$

Generally the velocity of the rocket at the first stage is mathematically represented as

$v_i = v_{ex} * ln [ \frac{m_o }{[1- m]m_o } ]$

=> $v_i = v_{ex} * ln [ \frac{m_o }{[1- 0.3]m_o } ]$

=> $v_i = v_{ex} * ln [ \frac{1 }{0.7 } ]$

=> $v_i =0.357 v_{ex}$

Generally the mass of the rocket after first stage is

$m_r = m_o - 0.3m_o -0.1m_o$

=> $m_r = 0.6m_o$

Generally the final velocity of the rocket at the second stage is

$v_f = v_i + v_{ex} * ln [\frac{m_r}{ m_f } ]$

=> $v_f = v_i + v_{ex} * ln [\frac{0.6 m_o }{0.3mo } ]$

=> $v_f = 0.357 v_{ex} + 0.693 v_{ex}$

=> $v_f = 1.05 v_{ex}$

4 0

3 years ago

DNA is coiled into chromosomes in a cell's

tia_tia [17]

Answer: Cell's nucleus

Explanation :

The full form of DNA is Deoxyribonucleic acid. The genetic information of a cell is organized in the DNA. It is inherited from parents by their children.

DNA is coiled into chromosomes in a cell's nucleus. It has a shape like a double helix. It is twisted in the form of spirals.

Hence, DNA is coiled into chromosomes in a cell's Nucleus.

6 0

3 years ago

Read 2 more answers

A police car is traveling at a speed of 50 meters per second when it suddenly accelerates at a rate of 5 m/s2. How fast will the

Virty [35]

Answer:i don't know sorry good luck tho

Explanation: i have not learned it yet

6 0

4 years ago

What year was the RoboSapien toy robot released?<br> a) 2007<br> b) 2004<br> c) 2020<br> d) dunno

Brilliant_brown [7]

option b )2004........

8 0

3 years ago

1. It’s fall and time for the corn maze and bonfire and you just can’t wait. On your way to the farm though a turkey flies out i

Reptile [31]

Acceleration = (change in velocity ( final speed - starting speed))/ (time)

Acceleration = (18-30)/10.5

Acceleration = -12/10.5

Acceleration = -1.14 m/s^2

Distance = 30m/s x 10.5s + 1/2(1.14)(10.5)^2

Distance = 252.2 meters

8 0

3 years ago