Physics, 13.07.2019 22:00 destinywiggins75

Aseagull flies at a velocity of 9.00 m/s straight into the wind. (a) if it takes the bird 20.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind? (b) if the bird turns around and flies with the wind, how long will he take to return 6.00 km? (c) discuss how the wind affects the total round-trip time compared to what it would be with no wind.

Answers: 1

Show answers

Answers

Answer from: emocow

The entire time period of the journey will be 22.222 min without the wind, while it will be (20+7.692) 27.692 mins with the wind flowing.

What is relative velocity?

Relative velocity is the velocity of an object with respect to another.

If it takes the bird 20.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind?

Distance traveled by the bird = 6 km

Time is taken by the bird = 20 min

We know that wind is going in the opposite direction of the bird, therefore, it will provide a drag to the bird,

$(v_{bird} - v_{wind}) = \dfrac{distance}{Time}\\$

$(9 - v_{wind}) = \dfrac{6 \times 1000}{20 \times 60}\\\\v_{wind} = 4\rm\ m/s$

Hence, the speed of the wind is 4 m/s.

If the bird turns around and flies with the wind, how long will it take to return 6.00 km?

Distance traveled by the bird = 6 km

We know that the wind and the bird will be going in the same, therefore, it will increase the bird's speed,

$(v_{bird} + v_{wind}) = \dfrac{distance}{Time}\\$

$(9+4) = \dfrac{6 \times 1000}{Time}\\$

${Time}= 461.538\rm\ sec = 7.692\ min$

Discuss how the wind affects the total round-trip time compared to what it would be with no wind.

Total distance = 12 km

Since there is no wind the speed during the entire journey will be the same,

$v_{bird} = \dfrac{distance}{time}$

$9= \dfrac{12 \times 1000}{time}$

time, t = 1333.3334 sec = 22.222 min

Hence, the entire time period of the journey will be 22.222 min without the wind, while it will be (20+7.692) 27.692 mins with the wind flowing.

Learn more about Relative Velocity:

link

Answer from: kmacho9726

Here we will the speed of seagull which is v = 9 m/s

this is the speed of seagull when there is no effect of wind on it

now in part a)

if effect of wind is in opposite direction then it travels 6 km in 20 min

so the average speed is given by the ratio of total distance and total time

$v_{avg} = \frac{6000}{20*60}$

$v_{avg} = 5m/s$

now since effect of wind is in opposite direction then we can say

$V_{net} = v_{bird} - v_{wind}$

$5 = 9 - v_{wind}$

$v_{wind}= 4 m/s$

Part b)

now if bird travels in the same direction of wind then we will have

$v_{net}= v_{bird} + v_{wind}$

$v_{net} = 9 + 4 = 13 m/s$

now we can find the time to go back

$time = \frac{distance}{speed}$

$time = \frac{6000}{13}$

time = 7.7 minutes

Part c)

Total time of round trip when wind is present

T = t_1 + t_2

T = 20 + 7.7 = 27.7 min

now when there is no wind total time is given by

$T = \frac{6000}{9} + \frac{6000}{9}$

T = 22.22 min

So due to wind time will be more

Answer from: Quest

question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation:

Answer from: Quest

area of focus

Another question on Physics

Physics, 22.06.2019 02:00

What is the mass of the same rock on the earth

Answers: 2

Answer

Physics, 22.06.2019 05:00

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

Answers: 2

Answer

Physics, 22.06.2019 07:10

Search coils and credit cards. one practical way to measure magnetic field strength uses a small, closely wound coil called a search coil. the coil is initially held with its plane perpendicular to a magnetic field. the coil is then either quickly rotated a quarter-turn about a diameter or quickly pulled out of the field. (a) derive the equation relating the total charge q that flows through a search coil to the magnetic-field magnitude b. the search coil has n turns, each with area a, and the flux through the coil is decreased from its initial maximum value to zero in a time ∆t. the resistance of the coil is r, and the total charge is q = i∆t, where i is the average current induced by the change in flux. (b) in a credit card reader, the magnetic strip on the back of a credit card is rapidly “swiped” past a coil within the reader. explain, using the same ideas that underlie the operation of a search coil, how the reader can decode the information stored in the pattern of magnetization on the strip. (c) is it necessary that the credit card be “swiped” through the reader at exactly the right speed? why or why not?

Answers: 2

Answer

Physics, 22.06.2019 07:30

Select all of the following that are equal to an impulse of 20 unitsa) force= 5, time= 5.5b) force= 25, time= 0.8c) force= 0.1, time= 200d) force= 10, time= 2(its b, c, and d)(also in order to find answer they have to add to get the unit)ex= 25x.8=20 or .1x200=20

Answers: 1

Answer

You know the right answer?

Aseagull flies at a velocity of 9.00 m/s straight into the wind. (a) if it takes the bird 20.0 min t...

Questions