HELP ASAP WILL BE MARKED BRAINLIEST A student made a table comparing mass and weight. What word best replaces X?

Mass Weight
Measure of how much material is an object--- Measure of the force of gravity pulling down on an object
Measured with a X-- Measured with a scale
Measured in grams or kilograms Measured in Newtons

choices:
Measuring cup
Pan balance
Thermometer
Ruler

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

See the attachment and solve question 5th