Ask question

Ask question

All categories

3 years ago

9

A 4.0 kg model rocket is launched, shooting 50.0 g of burned fuel from its exhaust at an average velocity of 625 m/s. What is th

e velocity of the rocket after the fuel has burned?

1 answer:

Scorpion4ik [409]3 years ago

8 0

Answer:

Velocity of rocket will be equal to 7.81 m/sec

Explanation:

We have given mass of the rocket $m_1=4kg$

Mass of fuel is given $m_2=50gram=0.05kg$ ( As 1 kg is equal to 1000 gram )

Velocity of fuel $v_2$ = 625 m/sec

We have to find the velocity of rocket $v_1$

From conservation of momentum we know that initial momentum is equal to final momentum '

So $m_1v_1=m_2v_2$ , here $m_1$ is mass of rocket $v_1$ is velocity of rocket $m_2$ is mass of fuel and $v_2$ is velocity of fuel

So $4\times v_1=625\times 0.05$

$v_1=7.81m/sec$

So velocity of rocket will be equal to 7.81 m/sec

You might be interested in

Unlike eukaryotes, prokaryotes do not have:

xxMikexx [17]

D. a membrane bound nucleus , lmk if im right

5 0

3 years ago

Read 2 more answers

An electron in a cathode-ray beam passes between 2.5cm long parallel-plate electrodes that are 6.0mm apart. A 2.1mT, 2.5-cm-wide

Dmitry_Shevchenko [17]

Answer:

(a). The speed of electron is $1.56\times10^{7}\ m/s$ .

(b). The radius of electron is $4.2\ cm$

Explanation:

Given that,

Length = 2.5 cm

Distance = 6.0 mm

Magnetic field = 2.1 T

Potential difference = 700 V

(a). We need to calculate the electron's speed

Using formula of speed

$v=\sqrt{\dfrac{2eV}{m}}$

Put the value into the formula

$v=\sqrt{\dfrac{2\times1.6\times10^{-19}\times700}{9.1\times10^{-31}}}$

$v=15689290.81\ m/s$

$v=1.56\times10^{7}\ m/s$

(b). We need to calculate the radius of electron

Using formula of centripetal force

$\dfrac{mv^2}{r}=qvB$

$r=\dfrac{mv}{qB}$

Where,

m = mass of electron

v = speed of electron

r = radius

q = charge of electron

B = magnetic field

Put the value into the formula

$r=\dfrac{9.1\times10^{-31}\times1.56\times10^{7}}{1.6\times10^{-19}\times2.1\times10^{-3}}$

$r=0.042\ m$

$r=4.2\ cm$

Hence, (a). The speed of electron is $1.56\times10^{7}\ m/s$ .

(b). The radius of electron is 4.2 cm

8 0

3 years ago

A compound is discovered and its molecular weight is determined to be 526g/mol. however, one of the elements has not yet been id

AfilCa [17]

Sulphur

The missing element is sulphur

Here the compound is composed of element X and chlorine.

it is given,

XCl (6) ----> 6Cl

mass = 13.1%

it is X and Cl = 100%-13.10%

= 86.90%

chlorine = 86.90

X = 13.10

We assume 100g of sample

so according to the above solved data, in 100g of sample we have 86.90 g of chlorine.

now we split that chlorine into two moles of chlorine.

Every mole of sale has 35.45 grams of sales. 2.451 moles of seal are mine after that.
We are aware that cl is six times more than X. To find the moles of X, I must divide this number by six.
we discover that we have 0.4086 moles of X when we divide this by six.
We obtain those moles of X from 13.10 g of X.
Given that Mueller masses grams per mole, I can compute the molar mass.
13.10 grams of X are contained in 0.4086 moles of X.
Or, to put it another way, each remote has a molar mass of 32–06 grams.
The element with this molar mass is sulfur, as I can see from the periodic table.
Okay, so the element we're looking for in this situation is sulfur.

To learn more about finding missing element visit;

brainly.com/question/14238796

#SPJ4

7 0

1 year ago

The range of all electromagnetic radiation is known as the

Readme [11.4K]

B.) <span>The range of all electromagnetic radiation is known as the "Electromagnetic Spectrum"

Hope this helps!
</span>

6 0

3 years ago

A multi-dimensional being reaches down to Earth and pulls you out of the universe. You are then thrown back into the universe at

Shkiper50 [21]

You are in an early universe.

In the study of the evolution of the universe, it has been determined before Plank time (before the big bang and right after it), the early universe had the following characteristics:

There was only one single force acting over all that existed.
The early universe was very hot and dense because all matter had contracted before the big bang.
Space and time were wrapped.

These characteristics match the ones described, based on this, we can conclude you are in an early universe.

Learn more about universe in: brainly.com/question/9724831

5 0

2 years ago