Answer:
Explanation:
From work energy theorem
Work done by all forces = Change in kinetic energy
Lets take
m= mass of object
h=height from the ground surface
initial velocity of object = 0 m/s
The final velocity of object is v
Work done by gravitational force = m g . h
The final kinetic energy = 1/2 m v²
So
Work done by all forces = Change in kinetic energy
m g h = 1/2 m v² - 0
v² = 2 g h
Answer:
1. A ruler is a common instrument used for measuring the length of small objects
2. The acceleration due to gravity at the surface of Earth is about 9.8 metres per second per second.
Conveniently, some scientists have already figured out how much heat energy it takes to increase the temperature of one gram of water by exactly 1 degree Celsius. That is called the specific heat of water and it's value is 4.184J/g.
So simply multiply the specific heat with the number of grams and the number of degrees C like this:
To find the number of neutrons in an atom, what we must do is to follow the following steps:
1) Find the element in the periodic table.
2) Find the atomic number of the element. The atomic number is the number of protons of a single atom of that element.
3) Find the atomic weight of the element.
4) Finally, we look for the number of neutrons. For this, we follow the following relationship:
Atomic weight - number of protons = number of neutrons.
Answer:
To find the number of neutrons in an atom, you would subtract:
B.) atomic number from mass number
