When two more people get into the car describe in sample problem c the total mass of all four occupants of the car becomes 255 kg now what is the period of vibration of the car when it is driven over a pothole in the road

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

What was the first instrument to ever record an earthquake?

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative