Answer:
An X-ray is used to take pictures of your bones. The waves that are used are known as radiation waves.
Answer:
5 Joules, 7.5 Joules and 10 Joules respectively
Explanation:
Potential energy due to gravity is given by mass*gravity*height or weight*height(As weight= mass*gravity)
The potential energy at the height of 1 meters = 5*1 = 5 Joules
The potential energy at the height of 1.5 meters = 5*1.5 = 7.5 Joules
The potential energy at the height of 2 meters = 5*2 = 10 Joules
Copper, gold and silver are three of them.
The metallic elements which all react to water are found in the same group, the groups name is the Alkali metals, or also known as group one.