Physics, 02.04.2020 02:27 britt0412

A plane loaded with cargo travels 2000 miles at an average speed of 400 Miles per hour. On the return trip on the same route it travels at an average speed of 480 miles per hour. How much quicker was the return trip

Answers: 3

Show answers

Answers

Answer from: mostman077

The trip was 434mph quicker.

Explanation:

Time taken for case 1 = distance/ time = 2000/400= 5hrs

Time taken in case 2 = distance / time = 2000/480= 4.2hrs

Time taken for the entire journey = 5 + 4.2 = 9.2hrs

Total distance = 2000+ 2000= 4000miles

Total speed = total distance / total time

Total speed = 4000/9.2 =434.78mph

Answer from: failingschooll0l

50 mins quicker

Explanation:

Given:-

- The destination journey was made at, v_i = 400 mph

- The return journey was made at, v_f = 480 mph

- The distance between the start and end points is d = 2000 miles

Find:-

How much quicker was the return trip

Solution:-

- The time taken for the destination journey (t_i) can be determined from speed-distance-time formula:

t_i = d / v_i

t_i = 2000 / 400

t_i = 5 hrs

- Similarly, time taken for the return journey (t_f) can be determined from speed-distance-time formula:

t_f = d / v_f

t_f = 2000 / 480

t_f = 4.1667 hrs

- The comparison between destination and return journey can be made:

t_i - t_f

5 - 4.1667

0.8333 hrs

50 mins

- The return journey was 50 mins quicker than destination journey.

Answer from: Quest

Ithink they do have the same properties just in less quantities i think

Answer from: Quest

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

$p(t)=0.3t^2+6t+80$

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

$p(0)=0+0+80=80$

according to question, we have said that if the population has twice its initial population, then it becomes

$p(t)=2\times 80=160$

so, time taken to reach this above mentioned population is given by

$160=0.3t^2+6t+80\\\\160-80=0.3t^2+6t\\\\80=0.3t^2+6t\\\\0.3t^2+6t-80=0\\\\\text{using quadratic formula ,we get }\\\\t_{1,\: 2}=\frac{-60\pm \sqrt{60^2-4\cdot \: 3\cdot \: 800}}{2\cdot \: 3}\\\\t=-29.14\ and\ t=9.149$

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

Another question on Physics

Physics, 22.06.2019 01:20

Acar moves a distance of 50.0 km west, followed by a distance of 64.9 km north what was the magnitude of the displacement of the car, in units of kilometers?

Answers: 2

Answer

Physics, 22.06.2019 05:50

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

Answers: 3

Answer

Physics, 22.06.2019 07:30

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Answers: 1

Answer

Physics, 22.06.2019 09:30

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

Answers: 3

Answer

You know the right answer?

A plane loaded with cargo travels 2000 miles at an average speed of 400 Miles per hour. On the retur...

Questions