Together the crust and upper mantle are called the lithosphere
At=v-u, where u=0
t= v/a=42/6 = 7
Answer: 7 seconds
Quantity of electrical charge is measured in Coulombs.
The symbol is C.
b. C
The frequency of the radio station is

For radio waves (which are electromagnetic waves), the relationship between frequency f and wavelength

is

where c is the speed of light. Substituting the frequency of the radio station, we find the wavelength:
Lab safety equipment prevents damage from accidents and helps keep the people working in the lab safe. The equipment goes hand in hand with the clothing of the person. The first step would be to wear closed shoes and a lab coat.
The equipment that must be worn are goggles to protect the eyes from irritants and latex gloves to protect the skin on the hands.