Four students measure the mass of an object, each using a different scale. They record their results as follows: A: 49.06g, B: 49g, C: 50g, D: 49.2g. Which student used the least and most precise scale?

Rubber on floor tile has a coefficient of kinetic friction of 1.0 and a coefficient of static friction of 2.0. how much force would a 3.5 lb. robot need to produce in order to start moving?

Ineed with these last two questions: 1) what are two types of cold air masses that influence the weather in north america? name them and describe their humidity. 2) describe the motion of a cold air mass and a warm air mass and the weather you would expect at a warm front and an occluded front.

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?