Kinetic energy = (1/2) * mass * velocity
Marble 1 = (1/2) * 10 * 3 = 15 Joules
Marble 2 = 30 J
Marble 3 = 37.5 J
Marble 4 = 60 J
Marble 5 = 45 J
Marble 4 has the most kinetic energy - D.
Answer
D) burning a candle
Explanation
When burning a candle no new substance is form.
We have both physical and chemical change occuring.
Physical part: Melting of the solid wax and evaporation of the liquid forms the physical change.
Chemical part: burning of the wax vapour forms the chemical change.
Answer:
0.36s, 2.3s
Explanation:
Let gravitational acceleration g = 9.81 m/s2. And let the throwing point as the ground 0 for the upward motion. The equation of motion for the rock leaving your hand can be written as the following:
where s = 4 m is the position at 4m above your hand. 
is the initial speed of the rock when it leaves your hand. g = -9.81m/s2 is the deceleration because it's in the downward direction. And t it the time(s) it take to get to 4m, which we are looking for
t = 2.3 or t = 0.36
Answer:
The three primary factors affect the injury severity of an electric shock: 1) the amount of current passing through the body 2) the duration of the current flow and 3) the current path through the body.
