How is it that substances can have the same chemical formulas but make different types of matter?

Jane starts driving her car down the road at 30 miles per hour. At the same time, the local train starts going down the tracks. The train is going 35 miles per hour, a little bit faster than Jane's car.

In 1986, the first flight around the globe without a single refueling was completed. The aircraft's average speed was 186 km/h. If the airplane landed at this speed and accelerated at - 1.5 m/s2, how long did it take for the airplane to stop?

A car of weight 1.8 x 10^4 N is accelerated uniformly from rest by a force of 5.0 x 10^3 N east for 6s. Calculate the following for the car the displacement from its original position.

The average density of living matter on earthâs land areas is 0.10 g/cm2. what mass of living matter in kilograms would occupy an area of 0.125 ha?

If you pour 100 grams of water from an 8 ounce can into a 16 ounce glass, by what amount does the density of the fluid change? ... ?

Which is a use of fiber optics?

When a positively charged conductor touches a neutral conductor, the neutral conductor will:

Definition of the rule E=mc^2

A 3.7 kg block is pushed along a horizontal floor by a force modifyingabove upper f with right-arrow of magnitude 25 n at a downward angle θ = 40°. the coefficient of kinetic friction between the block and the floor is 0.26.

When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other object? Explain