Astudent measures the gravitational acceleration g to be 9.76±0.07 m/s2. to improve his precision he spend a whole day repeating the measurement 400 times. he states the mean of the 400 measurements g 9.746 m/s2 as his best estimate of g. in the lab g has an accepted value of g- 9.80664 t0.2 m/s2 arising from a precision measurement conducted by geo-physicists in the past.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it