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
Pavel [41]
3 years ago
13

A 10 kg migratory swan cruises at 20m/s. A calculation that takes into ac-count the necessary forces shows that this motion requ

ires 200W of mechanical power. If we assume an efficiency similar to humans (say, 25%), a reasonableassumption, then the metabolic power of the swan is significantly higher thanthis. The swan does not stop to eat during a long day of flying; it get theenergy it needs from fat stores. Assuming an efficiency similar to humans, after12 hours of flight.
Required:
a. How far has the swan traveled?
b. How much metabolic energy has it used?
c. What fraction of its body mass does it lose?
Physics
1 answer:
IgorC [24]3 years ago
3 0

Answer:

Part A:

Distance=864000 m=864 km

Part B:

Energy Used=ΔE=8638000 Joules

Part C:

\frac{\triangle m}{m}=0.004998=0.49985\%

Explanation:

Given Data:

v=20m/s

Time =t=12 hours

In Secs:

Time=12*60*60=43200 secs

Solution:

Part A:

Distance = Speed**Time

Distance=v*t

Distance= 20*43200

Distance=864000 m=864 km

Part B:

Energy Used=ΔE= Energy Required-Kinetic Energy of swans

Energy Required to move= Power Required*time

Energy Required to move=200*43200=8640000 Joules

Kinetic Energy=\frac{1}{2}mv^2

K.E\ of\ Swans=\frac{1}{2} *10*(20)^2=2000\ Joules

Energy Used=ΔE=8640000 -2000

Energy Used=ΔE=8638000 Joules

Part C:

Fraction of Mass used=Δm/m

For This first calculate fraction of energy used:

Fraction of energy=ΔE/Energy required to move

ΔE is calculated in part B

Fraction of energy=8638000/8640000

Fraction of energy=0.99977

Kinetic Energy=\frac{1}{2}mv^2

Now, the relation between energies ratio and masses is:

\frac{\triangle E}{E}=\frac{\triangle m}{2m}v^2

\frac{\triangle m}{m}=\frac{2}{v^2} *\frac{\triangle E}{E}\\\frac{\triangle m}{m}=\frac{2}{20^2} *0.99977

\frac{\triangle m}{m}=0.004998=0.49985\%

You might be interested in
At 20 degrees Celsius, conducting wires made of different materials have the same length and the same diameter. Which wire has t
DENIUS [597]

Answer:

Aluminium

Explanation:

Aluminium has the least resistance since It has 3 free electrons per atom. Its resistivity is low compared to other metals provided in the choices (gold, nichrome, tungsten). Low resistivity of metals means a high conductance of the metal referred to.

7 0
3 years ago
Which is NOT something that all green plants have in common?
Anvisha [2.4K]

Answer:

Number 4

Explanation:

7 0
3 years ago
Read 2 more answers
The type of lens that spreads out parallel light is a
ohaa [14]

the answer is concave lens

7 0
3 years ago
John is hiking and notices a small stream of water flowing down the side of the mountain. What part of the water cycle is John o
Alexus [3.1K]

Answer: Runofff

Explanation: because it said that it is going down the side of the mountain

3 0
2 years ago
Select the correct answer
Rasek [7]

Answer:

I would say the net force acting on the car is in the opposite direction of the car's motion  is correct

5 0
2 years ago
Read 2 more answers
Other questions:
  • Compare and contrast speed and velocity
    5·1 answer
  • You have landed on an unknown planet, newtonia, and want to know what objects will weigh there. you find that when a certain too
    13·1 answer
  • Find the hiker’s gravitational potential energy if the cliff is 60m high
    13·1 answer
  • The distance from one compression in a sound wave to the next compression is defined as the __________.
    10·1 answer
  • Check your understanding: The quantity that is determined by the distance moved and the force used is called ,a) Power,,b) Work,
    12·1 answer
  • A _________ is a satellite or other spacecraft designed to explore space and transmit data back to Earth.
    8·2 answers
  • Water flowing through a watershed is effected greatly by which force?
    5·2 answers
  • What happens when you push a spring? How is this different than pulling it? (Hooke’s Law)
    14·2 answers
  • What effect would a barrier island have on the shoreline of the mainland?
    6·1 answer
  • A car on a straight road starts from rest and accelerates at 2.0 meter per second over a distance of 50 meters. Calculate the ma
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!