An engineer weighs a sample of mercury (ρ = 13.6 × 10^3 kg/m^3 ) and finds that the weight of the sample is 7.8 n. what is the sample’s volume? the acceleration of gravity is 9.81 m/s^2 . answer in units of m^3 .

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.