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
Salsk061 [2.6K]
3 years ago
6

A hungry fish is about to have lunch at speeds shown. Assume the hungry fish has a mass five times the mass of the small fish. I

mmediately after lunch, rank from greatest to least the speeds of the formerly hungry fish.
a) Big: v=4m/s, little: 0
b) Big: v=4m/s, little:1 m/s
c) Big: v=5 m/s, little: 2 m/s
Mathematics
1 answer:
Fiesta28 [93]3 years ago
6 0

Answer:

The answer is C > A > B

Step-by-step explanation:

This a conservation of momentum problem, that means that the initial momentum of the system is equal to final momentum of the system.

The mass of the big fish is 5 times greater than the mass of the smaller fish, therefore, to make things simpler,

Let the mass of the big fish be 5 kg and the mass of the small one be 1 kg.  

In our case we have:

Momentum before lunch = momentum after lunch.

(v_{1} *m_{1}) + (v_{2} *m_{2}) = (m_{1} *m_{2})* v\\

In the first case (A), v1 = 4 m/s ; v2 = 0 m/s  

(4 m/s*5kg) + (0 m/s*1 kg) = (5kg + 1 kg)*v

20 + 0 = 6v

V = \frac{20}{6}

V = \frac{10}{3} m/s

In the second case (B), v1 = 4 m/s ; v2 = -1 m/s  (v2 is negative because it’s going to the opposite direction of the bigger fish)

(4 m/s*5kg) + (-1 m/s*1 kg) = (5kg + 1 kg)*v

20 - 1 = 6v

V = \frac{19}{6} m/s

In the third case (C), v1 = 5 m/s ; v2 = -2 m/s  (v2 is negative because it’s going to the opposite direction of the bigger fish)

(5 m/s*5kg) + (-2 m/s*1 kg) = (5kg + 1 kg)*v

25 - 2 = 6v

V = \frac{23}{6} m/s

Therefore, the greatest speed is the third case and the smallest is the second case. So, C > A > B

You might be interested in
Find the gradient of the line segment between points (8,6) and (10,14)
fenix001 [56]

Answer: 4

Step-by-step explanation:

3 0
2 years ago
A certain affects virus 0.8% of the population. A test used to detect the virus in a person is positive 86% of the time if the p
Klio2033 [76]

Answer:

<h3>I can't help <em><u>sorry</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u> </u></em><em><u>.</u></em><em><u>bru</u></em></h3>
7 0
2 years ago
Which shape can be classified as a rectangle
Mama L [17]

Answer:

a square

Step-by-step explanation:

sorry if wrong

3 0
3 years ago
Why is (0,1) y-intercept of the form below?
morpeh [17]
It isn’t because when there is no addition in the equation the y intercept is 0
4 0
3 years ago
Which quadratic function in vertex form can be represented by the graph that has a vertex at (3, -7) and passes through the poin
Vaselesa [24]

Answer:

Answer is D

Step-by-step explanation:

(3,-7) and (1,-10) belong toD Variant

8 0
3 years ago
Read 2 more answers
Other questions:
  • 1. Write an equation to solve the following. Show all your work, including the steps for solving the equation and checking your
    11·2 answers
  • This one from maths pls help
    9·1 answer
  • A common inhabitant of human intestines is the bacterium Escherichia coli. A cell of this bacterium in a nutrient-broth medium d
    9·1 answer
  • Another Math problem !!
    10·1 answer
  • Graph each equation<br><br> y=x+4 help please
    12·1 answer
  • Two urns both contain green balls and red balls. Urn I contains 6 green balls and 4 red balls and Urn II contains 8 green balls
    8·1 answer
  • Who do you write 0.632 into word form
    8·1 answer
  • find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)
    12·1 answer
  • 1 1 point
    14·1 answer
  • Community Gym charges a $50 membership fee and a $60 monthly fee. Workout Gym charges a $210
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!