What was Miss D's speed if she traveled 6 km in 3 hours? YOU MUST SHOW WORK IN YOUR ANSWER: example below to get full credit 1. Formula : 2. Substitution: 3. Answer with units:

2km/hr

Step-by-step explanation:

The formula for calculating speed is expressed as;

Speed = Distance/Time

Given the following;

Distance = 6km

Time = 3hours

Speed = 6km/3hr

Speed = 2km/hr

Hence the speed travelled is 2km/hr

answer:  

123455421

step-by-step explanation: easy

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.