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Let's consider an example which would answer this question var priceOfFood = { pizza: 14, burger 10 } priceOfFood.hasOwnProperty('pizza') // true priceOfFood['pizza'] // 14 priceOfFood.hasOwnProperty('chips'...

Using the ES2015 syntax it can be done as follows: let numbers = [10, 42, 5, 87, 61, 34, 99]; let sum = numbers.reduce((a,b) => a + b); where the reduce signature is Array.prototype.reduce(accumulator, el...

Group 1 metals all have one outer electron, which is responisble for their properties. As you go down the group: the metals become more reactive. This is due to the increased number of electron shells which ...

Firstly you have a change away from optimum conditions, for instance a decrease in internal body temperature, which is detected by a receptor. The receptor relays this infromation down the communication path...

Initially, there is only one force acting on the skydiver, which is their weight. F=ma therefore mg=ma. The m's cancel and the skydiver falls with acceleration g. However as soon as they have a downwards vel...