The coefficient of kinetic friction between a 20 kg box and, Ask an Expert

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Q1. The density of sodium is 958g /cm^3. Assume you require 250 gm of sodium for an experiment. Which volume of sodium do you need?

Q2. A 400.0 m long thin wire carries a line charge density = 348.0 nC/m. Find the potential difference between points 6.0 m and 8.0 m.

Q3. The coefficient of kinetic friction between a 20 Kg box and the floor is 0.40. How much work does a pulling force do on the box in pulling it 8.0 m at the constant speed? The pulling force is directed 390 above the horizontal.

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