Is this HSC answer wrong from the 2010 exam? (1 Viewer)

[Epoh]

The questions is here: http://puu.sh/kOehr/5ef80341d5.png
The answer is here: http://puu.sh/kOeiM/22644ba510.png

For some reason they use the wrong Force value and also include gravity. Gravity shouldn't be included because it says the scale changes by 7.5*10^-4, not that it becomes 7.5*10-4.

The answer I got was 0.0125 Teslas into the page.

I got this by doing this:

B = F/IL

B = (7.5*10^-4)/(0.3*0.2)

Am I doing something wrong?

 

[keepLooking]

The questions is here: http://puu.sh/kOehr/5ef80341d5.png
The answer is here: http://puu.sh/kOeiM/22644ba510.png

For some reason they use the wrong Force value and also include gravity. Gravity shouldn't be included because it says the scale changes by 7.5*10^-4, not that it becomes 7.5*10-4.

The answer I got was 0.0125 Teslas into the page.

I got this by doing this:

B = F/IL

B = (7.5*10^-4)/(0.3*0.2)

Am I doing something wrong?

It changes by 7.5*10^-4 KG but F = BIL is based on force.

 

[D94]

If you step on a scale that is set at +10kg to begin with, and it increases by 60kg, then you weigh 60kg.

Now, just a common sense check would tell you that units of kg is not for Force.

 

[Epoh]

Nevermind, I figured it out. I forgot to convert from kg to Newtons.