Answer:
Mechanical energy = 429.984J
Explanation:
Given the following data;
Mass = 7.2kg
Velocity = 2.4m/s
Height = 5.8m
To find the mechanical energy;
Mechanical energy = kinetic energy + potential energy
First of all, we would determine the values of K.E and G.P.E
K.E = ½mv²
K.E = ½*7.2*2.4²
K.E = 3.6*5.76
K.E = 20.736 J
P.E = mgh
We know that acceleration due to gravity is equal to 9.8m/s²
P.E = 7.2*9.8*5.8
P.E = 409.248
Substituting the values into eqn 1, we have;
Mechanical energy = 20.736 + 409.248
Mechanical energy = 429.984J
<span>C. As a metal comb is held near an object with a negative charge, the comb becomes charged.
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1, 5 and 6 are the rocks your looking for, they make up the other ones on your list
No pollution is in the air, dripping a gum wrapper on the floor is littering
Krypton is the least metallic. Because it is a noble gas. The elements go from left to right in order of most to least metallic. Krypton is the farthest right out of all of the elements you listed.