2. First steps in C
Exercises
1. Agreement occurs at a temperature
x
where
x
= (5
/
9)(
x

32)
. Solving this equation gives
x
=

40
, so the scales agree at 40 degrees C or 40 degrees F. Annual mean temperatures are
less than this for a large part of Antarctica.
2. The ﬁrst few lines should look like
0 17.78 255.37 459.67
10 12.22 260.93 469.67
...
The temperature
60 F
corresponds to about
288
.
7 K
, and about 520 Rankine.
3. My code is below. I get 17.7 m, 20.8 m, and 49.2 m for 60 km/h, 65 km/h, and 100 km/h. The
RTA numbers are more than three times larger — presumably they are being conservative and
taking into account the possibility of skidding (the
μ
is for static friction), wet conditions etc.,
which involve a smaller
μ
.
/
*
stopping.c
*
Program to calculate the stopping distance of a car.
*
/
#include <stdio.h>
#define MU 0.8
#define G 9.8
int main()
{
float d, ukph, umps;
printf("Initial speed in km/h? ");
scanf("%f", &ukph);
umps = ukph
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 Three '09
 wheatland
 Fibonacci number, printf, Golden ratio, stopping distance

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