Which tools would sarah use to find an irregularly shaped objects mass and volume

It is a technique called water displacement method

Mass of an irregular object can be measured using a physical balance

Explanation:

It consists of a calibrated glass cylinder containing water.The initial level of water column is notedThe irregular object is submerged into it. The water level rises.The level of the water column is noted. The difference between the final and initial level of the water column gives the volume of the irregular object.The method used to find the volume of irregular shaped object is called the water displacement method.

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction