How do the independent and dependent variables in an experiment compare? a. they are the exact same as one another. b. they have no effect on one another. c. the dependent variable controls the independent variable. d. the independent variable controls the dependent variable.

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

Does heating a metal wire increase or decrease its electrical resistance? why?