A student is running an experiment to determine the relationship between force and acceleration. Given a cart, a track, and 3 mass bars of equal mass, the student uses a spring that can apply varying amounts of force to the cart and a
motion sensor and graphing software to collect acceleration data.
How should the student run this experiment? Circle the letter of your choice.

A.
Run trials with zero added mass, then run trials with increasing mass, until all 3 mass bars are added, increasing
the force as mass is added.

B.
Run trials with zero added mass, then run trials with increasing mass, until all 3 mass bars are added, holding
force constant as mass is added.

C.
Run trials with zero added mass, then run trials with all mass bars added, increasing the force as mass is added.

D.
Run trials with any constant mass, increasing force as more trials are collected.

yup its correct its: c) b b

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia