Energy is conserved when driving a car when the car is not using gas it is not using energy therefor conserving energy
Answer:
Fruit Punch
Explanation:
A pure substance is whereby there is only one type of element or a compound in the periodic table in the substance.
Carbon: Well its just C in the periodic table, so this is definitely pure.
Water Molecule: What makes water? H2O right? Contains Hydrogen and Oxygen, and as we all know H2O is a compound, therefore this is a pure substance.
Fruit Punch: What makes fruit punch, water and fruits. Fruits may contain citric acid(a compound itself), and is mixed with water with already has a compound, so having 2 different compounds will result in a mixture and therefore it will not be pure.
Answer:
V0 = 44.97m/s
Height above fence = 66.67m
Explanation:
The detailed calculation is done as shown in the attachment
Answer:
2.8 m/s
Explanation:
Energy of a system cannot be destroyed . It can only be transfer to another form of energy.
when the pendulum is at rest in a height 0.4 m , it has a potential energy due to the height it is. but no kinetic energy since ni movement (velocity)
at the time it reach the lowest point of the path , we can say that it is in the minimum potential level , therefore it now does not have any potential energy , but has a kinetic energy
energy at rest = energy at lowest point
KE1 + PE1 = KE2 + PE2
0 + 1.5 * 9.8 *0.4=
V=√(2*9.8*0.4)
V = 2.8 m/s
Hi there!
We can use the following equation to derive acceleration:
vf = vi + at, where:
vi = 0 m/s (starts from rest)
a = acceleration
time = time (sec)
Rewrite:
vf = at
Solve for acceleration:
vf/t = a
30/6 = 5 m/s²