Please help answer questions 1-4. Show your work.

1) V = a × t, where v is the velocity, a is the acceleration and t is the time

2) Vf - Vi = a × t

So 1.3 - 1.1 = a × 20

a = 0.01 m/s²

3) Vf - Vi = a × t

0 - 2 = a × 3

a = -2/3 m/s²

4) If an object is slowing down, the acceleration is negative and vice versa.

Explanation:

If we assume the balloon to be a constant pressure device and the gas filling it to be ideal.

pV = nRT

p, n and R are all constants so

V is directly proportional to T (which must be in Kelvins)

1.8/1.5 = (T + 273)/(25 + 273)

T = 84.6

T = 85°C