Answer: if it is in inches than it is 21.844 cm
Explanation:
According to Newton`s law. Force exerted by car,

After adding an additional 400 kg of mass, the force will be same therefore the acceleration

Thus, the acceleration after adding the masses is 1.47 \ m/s^2.
Viruses are infectious particles made of nucleic acid (DNA or RNA) and protein. Viruses are 100 times smaller than the size of bacteria.
Answer: Concentration of H+ =10^-7; log of 10^-7=7 so pH=7
Explanation:
Answer:
R = 6.8
Explanation:
Given data:
Richter scale
where R - magnitude of earthquake of Richter scale
I - quake's intensity 
- minimum intensity earthquake
Plugging all information in the equation to get Richter's scale


R = 6.8