A bus is travelling along a straight road. The bus and the driver have a combined mass of 16000kg when there are no passengers in it. The bus has 73 passengers. The average mass of each of the passengers is 65kg. The fully loaded bus accelerates uniformly from rest to a speed of 14m/s. The time taken to reach a speed of 14m/s is 20s. Calculate the resultant force on the bus during the acceleration.

Which notation is used to represent an alpha particle? a. b. c. d.

What does si stand for, when referring to a system of measurement

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?