The lever is a movable bar that pivots on a fulcrum attached to or positioned on or across a fixed point. The lever operates by applying forces at different distances from the fulcrum, or pivot.
A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever.
The mechanical advantage of the lever is increased by moving the fulcrum closer to the load i.e., by shifting the fulcrum towards the right. Moving the fulcrum away from the load has mechanical disadvantage as the distance between the load and the fulcrum increases, the input force becomes greater than the output force.
Answer:
It requires evidence or proof and to avail something is true.
Explanation:
Answer:
23
Explanation:
To find mass/atomic number of an atom, you add the proton and neutrons together.
Explanation:
Some Uses of Electromagnetic waves :
(A) <u>Microwaves</u>
- Satellite Communication
- For cooking food, etc
(B) <u>X</u><u> </u><u>-</u><u> </u><u>Rays</u><u> </u>(produced by slowing fast moving electrons)
- Used in diagnosis of bones, etc
- luggage content search at airport, etc
(C) <u>Radio</u><u> </u><u>Waves</u><u> </u>
- Radio and television broadcasting
- Navigational communication, etc
Answer: 
we need to estimate the product of two numbers by writing them in scientific notation and rounding them off.
In scientific notation, number 91321972 can be written as 
If we round this off to 1 significant figure, it would be:
In scientific notation, number 0.007004 can be written as 
If we round this off to 1 significant figure, it would be:
Product of these two numbers:
