To calculate the density of an object, which of the following values do you need to know?
A. Volume
B. Buoyancy
C. Weight
D. Mass

A. volume and D. mass

Explanation:

Density is the amount of matter (mass) in a given space (volume).

The density of an object can be found using the following formula:

d=m/v

where m is the mass and v is the volume.

In order to find the density, you must know the mass and the volume of the object.

Therefore, the correct answers are A. volume and D. mass.

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)