Answer:
9.8 m
Explanation:
The rate of free fall of a body does not depend on its mass or shape in the absence of air resistance. This property of gravitational force is proved by the famous leaning tower of Pisa experiment by Galileo.
The gravitational force is responsible for the gravitational acceleration of a body.
When considering the gravitational acceleration near the surface of Earth it has the constant value g = 9.8 m/s irrespective of the mass of the body.
This phenomenon states that every projectile falls at the same rate such that its velocity keeps on increasing to maintain the constancy of g.
So, when a projectile fall initially from a certain height for one second, it would have traveled only 9.8 m.
When a balloon is rubbed with human hair, the balloon acquires an excess static charge. This implies that some materials can give up electrons more readily than others.
Answer: Option C
<u>Explanation:</u>
We know that charges can neither be created nor be destroyed by law of conservation of charges. So when we rub two objects, it is natural to have a transfer of charges. But the charges which get transferred may be negligible in most of the cases leading to no significant observations.
But for some materials, like when we rubbed a balloon with human hair, we observed clouding of excess static charge on the balloon surface. This indicates that hair can easily give up electrons to balloon leading to clouding of excess static charge on it.
<h2>Answer:</h2>
<u>The number of neutrons is </u><u>47</u>
<h2>Explanation:</h2>
In order to find the number of neutrons we subtract the atomic number from the atomic mass.
In the given case the atomic number is 23 and mass number is 70 so
No of neutrons is 70 -23 = 47
Vectors represent relationships according to the position, velocity, and acceleration (of a moving object).
Because so many physical things are vectors, you have to be able to add and subtract them, helping you understand how the world around you behaves.
I had to do some research (I was never good with physics) so if you have a couple questions, I will try to explain.
