When its still the form of jelly, it is flammable, but it does not go everywhere or it doesn't evaporate.
Answer:
a. Positive and decreasing
b. 0
c. -9.81 m/s2
d. -9.81 m/s2
e. -9.81 m/s2
Explanation:
a. Since there's a constant gravitational acceleration acting downward, an upward velocity would decrease over time, until it reaches 0 at it's maximum altitude.
b. It's 0 at maximum altitude as it's no longer progressing upward. Otherwise it wouldn't be a maximum altitude.
c. d. and e. Doesn't matter where the ball is, it'd be always subjected to a constant gravitational acceleration, which is 9.81 m/s2/
Answer : The total work done in raising the ball is, 0.98 J
Explanation : Given,
Mass of the ball = 0.075 kg
Height raised of the ball = 1.33 m
As we know that the object is moving with the constant velocity, that means the work done against the gravity will be the net-work done.
So, the work done will be:

where,
w = work done
m = mass of ball
h = height of ball
g = acceleration due of gravity = 
Now put all the given values in the above formula, we get:


Thus, the total work done in raising the ball is, 0.98 J
The answer is 2. Magnetite. Hope I could help you :)