Ciara's bike has rusted, which means that the iron in the

metal changed to rust.

What has occurred?

an energy formati

an exothermic rea

a chemical reactio

a precipitate forma

Matter is made out of atoms - assuming the conditions are not very extreme. In neutral atoms negative electrons orbit around the positive nucleus. The nucleus is composed of positive protons and neutral neutrons.

What rock is formed by metamorphosing shale?

A swimmer swims 1000 m in the pool in 8.6 minutes. What was the average speed of the swimmer in m/s?

An ion in a mass spectrometer follows a semicircular path of radius 14.8. What is the distance it travels?

An electric heater is rated 1000w, 250v. calculate the resistance

What is one exsample of a closed economy

A transfer by work from the system, an elevation decrease of 50 m, and an increase in velocity from 15 m/s to 30 m/s. The specific internal energy, u, decreases by 5 kJ/kg and the acceleration of gravity is constant at 9.7 m/s².

What is the best prediction for the weather on the day after high pressure system passes

Is it possible to have motion in the absence of a net force?

There are 2 charged particles, A and B. You know that particle A is positively charged. When you place particle B next to particle A, then particle B starts moving away from particle A. What does this mean for particle B?