1. If a density of a certain kind of wood is 0.5 cm3 what is the mass of : a. 1cm3
b. 2 cm3
c. 10 cm3

2. A clear plastic box has a base of 6 cm sq and contains water to a height of 7 cm. what is the volume of the water in the box? A stone is lowered into the water so that it is completely covered. The water rises to a height of 9 cm. What is the volume of the stone?
( with working please )

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Which of the following are guidelines to follow for obtaining accurate observations

What’s #16 asking and how do i solve it?