Answer:
Kinetic energy, E = 40 Joules
Explanation:
Given that,
Mass of the object, m = 2 kg
It is released from rest from a height of 3 m above Earth's surface,
We need to find the kinetic energy the object have when it reaches a height of 1 m,
It is a case of conservation of mechanical energy. It states that the total energy of the system remains constant. The kinetic energy is given by :
E = 40 Joules
So, the kinetic energy of the object when it reaches a height of 1 m is 40 joules. Hence, this is the required solution.
Answer:
After a nucleus with 85 protons undergoes alpha decay, it has 83 protons.
Explanation:
In an alpha particle there are two protons
In the given substance's nucleus, there are total of 85 protons
After the decay, the proton number reduce
The current proton number after decay is
85 -2 = 83
After a nucleus with 85 protons undergoes alpha decay, it has 83 protons.
Answer:
Explanation: As the earthworm passes through the slime tube, the tube will pass over the female pore picking up eggs. The tube will continue to move down the earthworm and pass over the male pore called the spermatheca which has the stored sperm called the spermatozoa.
Answer:
21.23 cm
Explanation:
Being that the mass of the bar is equal on both sides, the moment produced by the masses cancel each other out, so you can just look at the hanging masses.
Sum of the moments about the fulcrum = 0... I'll say that moments produced on the 4.6 kg side are positive
0 = 4.6kg * g * 12.0 cm - 2.6kg * g * x
g's cancel. solve for x
x =( 4.6 * 12) / 2.6
x = 55.2 / 2.6
x = 21.23cm
so 2.6kg mass should be pivoted at a distance of 21.23 cm from pivot.