The core of a star must be at the temperature of 10,000,000 degrees Celsius for hydrogen fusion to begin.
Finding acceleration= final speed-initial speed/time taken (or A=V-U\T)
Finial speed= 27.8s
Initial speed= 0s
Time taken= 5.15
So..
27.8-0/5.15= 5.40m/s (rounded to two decimal places)
You use more significant figures. 5 sigfigs (1.0985) is more accurate than 2 sigfigs (1.0)
Anything times zero is zero
