Physical formula, seek explanation Uniform acceleration motion formula s = 1 / 2GT & # 178;

Physical formula, seek explanation Uniform acceleration motion formula s = 1 / 2GT & # 178;

This is the formula of free falling body, not the formula of uniform acceleration motion. If it is, it is the formula of uniform acceleration motion with zero initial velocity

Two transmission lines were set up between a and B. after a rainstorm, the two transmission lines had a short circuit somewhere. In order to determine the specific location of the short circuit, the electric worker operated as follows: he connected the ends of the two transmission lines to the positive and negative electrodes of the battery with a voltage of 3V in a, and measured that the current in the transmission line was 30mA If the resistance per meter of the wire is 0.01 ohm, the place where the short circuit occurs is far from the ground______ Rice

According to Ohm's law, the total resistance of the transmission line r = UI = 3v0.03a = 100 Ω, then the total length of the conductor L = 100 Ω 0.01 Ω / M = 10000m, because the conductor is two, so the short circuit is 10000m2 = 5000m from the ground, so the answer is: 5000

What letters are needed to represent what physical quantities

It seems that there is no calculation formula in grade 3 of chemistry, only a lot of chemical formulas will be found in the book. As for physics, these are the basic: (I hope it is useful for you) 1. Density (ρ): 1. Definition: the mass of a substance per unit volume is called the density of the substance. 2. Formula: ρ = m / V, M is the mass of the object