Question

A jet is flying with a uniform motion of 9.3 x 10^2 ms/ (S), magnitude approx. Mach 2.7. At time zero it passes a a mountain top. Construct a table

Answer 1

where are you needing help at?
and is "9.3 x 10^2 ms/ (S)" meaning milliseconds per Second?

Answer 2

Yes

Answer 3

How do I construct the table to show the plane's position to the mountain top at the end of each second for a 12 s period?

Answer 4

what is the "(S)"?

Answer 5

I dont exactly get what they're trying to ask... :( and S= seconds

Answer 6

I think I get it, but its taking me a second to gather my thoughts to make sure I understand what they quesiton is really asking ^_^

Answer 7

Its alright :)

Answer 8

Are you sure (S) isn't south and ms isn't actually m/s ?

Answer 9

Omg, yes you're right. I'm so sorry!!! I typed it out to quickly!!!

Answer 10

mach 1 = speed of sound = 295.1 m/s
so
mach 2.7 = (295.1) * 2.7 = 796.8 m/s
and you're told
930 m/s?

I'm not sure what these two speeds mean... or how thy relate...

Answer 11

Yes thats what it is said in the book.... 9.7 x 10^2 m/s (S) :(

Answer 12

Does it give another direction for the mach 2.7 speed?

Answer 13

boy... i'm not sure which speed to use.. maybe make a table with both speeds? or does one speed mean south and the other speed means east or west?

Answer 14

No it doesn't give another direction... :(

Answer 15

How did you get the 295.1 m/s by the way?

Answer 16

mach 1 means speed of sound which equals 295.1 m/s ^_^

Answer 17

Mach 1 is the speed of sound (Aprox. 295.1 m/s ). To get Mach Whatevernumberyouwant, you just multiply Mach 1 times whatevernumberyouwant. In this case Mach 2.7 = 295.1*2.5 m/s.

Answer 18

Did you research that? Sorry :$

Answer 19

Is this suppose to be known on that top of my head or was it researched? Sorry, I'm just trying to figure it out :$ D:

Answer 20

Ehmmm, most people know that the speed of sound is approximately 300 m/s. It's a sort of constant (It really isn't, but it doesn't change that much). It's just like memorizing that pi is 3.1416.

Answer 21

Ohh alright, thank you :) So I would need to construct two tables then?

Answer 22

I dont exactly get how this would look like :( Im really confused...

Answer 23

I think constructing atleast the one table using the speed of 930 m/s is best rout since the question is unclear..

Answer 24

"A military jet is flying with uniform motion at 9.3×10^2 m/s [S], the
magnitude of which is approximately Mach 2.7. At time zero, it passes
a mountain top, which is used as the reference point for this question. "

I'd guess you just have to tabulate for 930 m/s. Which, considering that the speed is constant, you just have to multiply 930 times every integer between 0 a 12.

Answer 25

(ALSO, fun fact! (930 m/s)/2.7 is 344 m/s, which is the speed of sound at sea level. So the jet would need to be traveling on land so that it'd actually be traveling at Mach 2.7)

Answer 26

I researched it back, and here is how the two number relate
at an altitude of sea level, Mach 1 = 340 m/s,
if we take the 930 / 340 = 2.73
so (Lessis beat me to it ^_^)

Answer 27

@Lessis you got this, i'm gonna help another

Answer 28

So would the table be 0 = 0, 1 = 930, 2= 1860...?

Answer 29

Considering it's speed constant, yes. \[V = \frac{ d }{ t }\]
So\[d = Vt\]
So the distance at t = 1 second would be V*1. And at 2 V*2 and so on.

Answer 30

Do I multiply 930 m/s by 0,1,2,3 so on?

Answer 31

Up to 12 m/s right?

Answer 32

Yes, and no. t=0, t= 1, t= 2, t=3, t=4, ... , t=12 are seconds, not speed. And the result you get is a distance, in meters. (d = Vt)

Answer 33

What you're doing is correct, just check your units so you get what is asked and don't screw up. (Distance in meters, speed in meters/second, time in seconds, etc)

Answer 34

Ohhhhhh... Okay :))

Answer 35

Thank you so much! :)

Answer 36

You're welcome. ;D

Answer 37

I'm sorry it took awhile... I'm a slow learner :(