1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Schach [20]
3 years ago
6

A 4.0 kg model rocket is launched, shooting 50.0 g of burned fuel from its exhaust at

Physics
1 answer:
Anettt [7]3 years ago
3 0

The velocity of the rocket is 7.8 m/s

Explanation:

We can solve the problem by using the law of conservation of momentum: in fact, in absence of external forces, the total momentum of the rocket+fuel system must be conserved.

Before the launch, the total momentum of the system is zero, since the rocket and the fuel are at rest:

p=0

After the launch, the total momentum is

p=MV+mv

where

M = 4.0 kg is the mass of the rocket

V is the velocity of the rocket

m = 50.0 g = 0.050 kg is the mass of the fuel ejected

v = -625 m/s is the velocity of the fuel (taking "backward" as negative direction)

Since the total momentum is conserved, we have

0=MV+mv

So we can solve the equation to find V, the velocity of the rocket:

V=-\frac{mv}{M}=-\frac{(0.050)(625)}{4.0}=+7.8 m/s

And the positive sign means the rocket moves forward.

Learn more about momentum:

brainly.com/question/7973509

brainly.com/question/6573742

brainly.com/question/2370982

brainly.com/question/9484203

#LearnwithBrainly

You might be interested in
Which best describes Earth's magnetic pole?
goblinko [34]

Answer:

b

Explanation:

because with no pole there is no role

7 0
3 years ago
Read 2 more answers
The flow of electricity in a certain path is called.
JulijaS [17]

The flow of electricity in a certain path is the circuit.

5 0
2 years ago
What is the potential energy of a puppy that weighs 18 N istting in a high chair 2 m high?
kykrilka [37]

Answer:

Potential energy =mass* acceleration due to gravity * height

mass*acceleration due to gravity =weight

hence potential energy of the puppy= weight * height

=18*2

=36 joule

6 0
3 years ago
Use the SI prefixes in Table 3 of this chapter to convert these hypothetical units of measure into appropriate quantities: a. 10
8090 [49]
A. 10 rations = 1 deca-ration.

b. 2000 mockingbirds = 2 x 10³ = 2 kilo-mockingbirds.

c. 10⁻⁵ phones = 1 micro-phones.

d. 10⁻⁹ goats = 1 nano-goats.

e. 1018 miners = 1.018 x 10³ = 1.018 kilo-miners.
4 0
3 years ago
The noise level coming from a pig pen with
sweet [91]

Answer:

The decibel of the remaining pigs is 51.5 dB.

Explanation:

Decibel (dB) is a unit of measure of the intensity of a given sound.

Number of pigs = 199, noise level = 74.3 dB.

Given that the intensity (I) of the sound from the pen is proportional to the number of pigs (N), thus:

                       I    \alpha  N

                       I = kN

where k is the constant of proportionality.

⇒                    k = \frac{I}{N}

                         = \frac{74.3}{199}

                      k = 0.3734

When 61 numbers of pigs were removed, the number of remaining pigs (N) squealing at their original level is 138.

Thus, the becibel level (I) of the remaining pigs can be determined by:

                  I = kN

                    = 0.3734 × 138

                   = 51.53 dB

The becibel level (I) of the remaining pigs is 51.53 dB.

6 0
3 years ago
Other questions:
  • Which of the following is a ferromagnetic material
    13·2 answers
  • In a "worst-case" design scenario, a 2000-kg elevator with broken cables is falling at 4.00 m/s when it first contacts a cushion
    8·1 answer
  • Which of the following has the greatest density?
    5·1 answer
  • The wavelength of some green light is 530.0 nm. what is the frequency of this green light?
    9·1 answer
  • In this section of a circuit, a current of 2.6 A flows across R1. What is the potential difference V between point x and point y
    5·1 answer
  • Match each characteristic with the type of wave it corresponds to. Longitudinal waves Transverse waves The direction the wave tr
    9·2 answers
  • WHat is the correct definnition for recovery heart rate ?
    10·1 answer
  • Although sunlight is unpolarized, the light that reflects from smooth surfaces may be partially polarized in the direction paral
    6·1 answer
  • An archer fires and arrow while standing atop a 5.15 m tall wall. The arrow is fired at an angle of 55 degrees and has a launch
    8·1 answer
  • HELP PLEASE!!!!!!!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!