D. all of these
Before using a triple beam balance, it is important to ensure that the pan is clean and dry, the balance is calibrated to zero, and that the riders are all set to zero to ensure accurate measurements.
Prior to using a triple beam balance, it is necessary to
A.
make sure that the pan is clean and dry.
B.
make sure that the balance is calibrated to zero.
C.
make sure that the riders are all set to zero.
D.
all of these
1 answer