well???

[orangez]

Captain, do u reckon you could type out the satellite questions with the data? Just wanna recalculate to make sure, because I have no idea what i got.

[Tea.bag]

guys, what did u get for the circular motion question?

[pinchies]

[quote ]
No point.  Is there any question inparticular you wanted to look at?
[/quote]
yes *please*!! The first graph question in the spring section. I can't remember the phrasing.

[fredrick]

6N i think

[Tea.bag]

but the 6N is provided by the friction of the ground onto the car...not the tension isnt it??

[Tea.bag]

isnt tension in the string resolved by vector addition?

[Captain]

yes.  What was Q10?

A 400 microF smoothing capacitor is now installed in the circuit as shown in Figure 6.
Q10) Which one of the following best shows the display the student would now see on the Oscilloscope?
A) Shows a straight line at 12V.
B) Shows a full wave rectified signal, but no smoothing [wrong]
C) Shows a signal with small ripple voltage.
D) Shows a half wave rectified signal, no smoothing [wrong]

Was C, I'm pretty sure.  Maybe have been A, depending on how smooth the ripple was, Hard to tell as Vripple formula breaks down for these values.

and Mao got D for the spring->kinetic energy one.

I don't think it is.  I had some logic behind why it wasn't D, but I can't remember it

Captain, do u reckon you could type out the satellite questions with the data? Just wanna recalculate to make sure, because I have no idea what i got.

In March 1999 the Mars Global Surveyor entered its final circular orbit around Mars, Sending information about Mars back to Earth.
G=6.67*10^-11
Mass of Mars Global Surveyor = 930kg.
Maass of Mars = 6.42*10^23
Radius of Orbit = 3.83*10^6

Calculate the Gravitational force of the Mars Global Surveyor.

Calculate the period of orbit, of the Mars Global Surveyor.

[Captain]

but the 6N is provided by the friction of the ground onto the car...not the tension isnt it??

The centripital force is what keeps an object in circular motion.

In this case, the tension in the string keeps the car in circular motion, not the friction.

[dcc]

yes.  What was Q10?

A 400 microF smoothing capacitor is now installed in the circuit as shown in Figure 6.
Q10) Which one of the following best shows the display the student would now see on the Oscilloscope?
A) Shows a straight line at 12V.
B) Shows a full wave rectified signal, but no smoothing [wrong]
C) Shows a signal with small ripple voltage.
D) Shows a half wave rectified signal, no smoothing [wrong]

Was C, I'm pretty sure.  Maybe have been A, depending on how smooth the ripple was, Hard to tell as Vripple formula breaks down for these values.

I chose C for that one, as R was pretty small (10 ohms i think), so there would of been perceivable ripple.

[Pop]

but the 6N is provided by the friction of the ground onto the car...not the tension isnt it??

The centripital force is what keeps an object in circular motion.

In this case, the tension in the string keeps the car in circular motion, not the friction.

2nd that. Everyone put N towards cente of circle...?

[orangez]

Calculate the Gravitational force of the Mars Global Surveyor:

Is that what people got?


Calculate the period of orbit, of the Mars Global Surveyor.

Correct?

[orangez]

What was the data for the Tension question?

[dcc]

Calculate the Gravitational force of the Mars Global Surveyor:

Is that what people got?


Calculate the period of orbit, of the Mars Global Surveyor.

Correct?

from memory, those are exactly what i attained.

[Pop]

Calculate the Gravitational force of the Mars Global Surveyor:

Is that what people got?


Calculate the period of orbit, of the Mars Global Surveyor.

Correct?

used 2 different formulas one got 7180and the other 7200 so im guessing correcto

[Captain]

LOL. So, what are the general accepted answers for the KE and GPE graphs? B and A, respectively?

That's what i chose.

Calculate the Gravitational force of the Mars Global Surveyor:

Is that what people got?


Calculate the period of orbit, of the Mars Global Surveyor.

Correct?

I got the period right, like I said before, I got the first part of that wrong.

What was the data for the Tension question?

Car has a mass of 2.4kg, moves at constant speed of 2m/s.  Circular of radius 1.6m

What is T?