The tutor looks into recommended daily protein intake for athletes. I’ve been under the impression that around 50g protein per day would be adequate for me (175lb, active). However, from my investigation today, that’s too low, even for a sedentary …

Exercise and Fitness: protein consumption for muscle building Read more »

The tutor discusses the electric field between two parallel plates, then between two point charges. A consequence of Gauss’s Law is that, from an infinite charged plane, the electric field is constant, independent of distance, and given by E = …

Physics: Why is electric field between parallel plates constant, but not between two point charges? Read more »

The tutor tells how to access the built-in εο constant on the Sharp el-520w. The Sharp el-520w has 52 built-in constants relating to physics, chemistry, etc. Here’s how to call up εο, which has value 8.85×10-12: Press the CNST key, …

Calculator usage, physics: εο: permittivity of free space constant on the Sharp el-520w Read more »

The tutor looks more specifically into the effect of compression on gas temperature. In my January 20 post I began about thermodynamics and the effect of compressing a gas. Today, I’ll give more specific coverage. The temperature rise a gas …

Chemistry, thermodynamics: temperature increase caused by compression, continued Read more »

The tutor imagines a water pressure scenario. Let’s imagine the pressure of a faucet is 40psi (pounds per square inch). For the sake of physics, we might convert that pressure to N/m^2: (40lb/inch^2)*(9.8N/2.2lb)*(inch/0.0254m)^2=276182N/m^2 The gravitational force on a water column …

Physics: pressure: how high a column of water might a household tap support? Read more »