sumaya259 sumaya259

07-09-2016
Chemistry

contestada

A metal surface becomes dull because of continued abrasion physical change or chemical

Respuesta :

john157 john157

07-09-2016

it had to be a physical change unless there a chemical touching the metal surface making it a chemical change .

Answer Link

Otras preguntas

If two materials are made from different kinds of atoms, what else should you expect to be different? A. The kinds of neutrons they have B. The properties they

Convert 123 cm to dam

Arrange the order of events in West Side Story correctly, from first to last. Maria arrives in America and Tony seems to lose interest in the gang The Jets and

describe the process of natural selection

Convert 465 milligrams to kilograms

Each week shelly rides her bicycle 3 miles farther than the week before. Describe the rule that relates the number of weeks she has been trailing to the number

who led Russia when the country left the Allied forces.

salma went for a drive in her new car. she drove for 332.8 miles at a speed of 52 miles per hour. for how many hours did she drive?

please help!!! a model car has a scale of 1:25. the length of the model when built is 9.6 in. what is the length of the actual car? answer choices: 1. 20 feet 2

aaron tracks the time it takes him to mow lawns by writing coordinate points relating x, the time in hours it takes to mow a lawn, and y, the size of the lawn i