Mass Trial
Average Time
(sec)
0.457
322 g
1
1
2.
3
Time for the
object
I
0.37
0.44
0.56
0.56
0.79
0.68
0.7
337
g
1
0.677
2
3
1
355 g
0.79
NI
0.74
3
0.93

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j