I'm going to ignore the <em>sd</em> as a typo and answer the rest of it.
Friction will slow down an object, and the force will create heat to warm the object up. When there's a lot of friction, sound can be heard as more energy is transferred.
Answer:
the initial velocity of the ball is 17.14 m/s
Explanation:
Given;
maximum height reached by the ball, h = 15 m
let the initial velocity of the ball = u
at maximum height, the final velocity of the ball is zero, v = 0
The initial velocity of the ball is calculated by using the following upward motion kinematic equation;
v² = u² - 2gh
0 = u² - 2(9.8 x 15)
u² = 294
u = √294
u = 17.14 m/s
Therefore, the initial velocity of the ball is 17.14 m/s
Answer:
a series of decays producing sequentially more stable nuclei
Explanation:
A nuclear decay chain represents a series of decays producing sequentially more stable nuclei.
- For every atomic nucleus, there is a specific neutron/proton ratio which ensures the stability of the nucleus.
- Any nucleus with a neutron/proton combination different from its stability ratio (i.e either too many neutrons or too many protons) will be unstable and split into one or more other nuclei with the attendant emission of small particles of matter.
- The decay process is a continuous chain reaction steps.
- Until stability of the nucleus is attain, it continues.
Earth around the sun and the moon around the earth
