Is density a physical change, chemical change, physical property, or a chemical property?

A car moves 100 meters in 6 seconds. Calculate the car's speed. d= t= v=

2 A kovács a meleg vasat a hideg vízbe teszi. A vas energiája 300 kJ-lal csökkent. Mennyivel nőtt a vízé?

A cylinder is filled with 10.0L of gas and a piston is put into it. The initial pressure of the gas is measured to be 232. kPa. The piston is now pulled up, expanding the gas, until the gas has a final volume of 29.0L.

Donald is wearing a t-shirt with the words "Down with America." As he walks down the street, many people make angry comments to him about his shirt.

Sarah roller skates 18.5km in 3 1/2 hours. what is her average speed in kilo per hour?

In a research facility, a person lies on a horizontal platform which floats on a film of air. When the person's heart beats, it pushes a mass m of blood into the aorta with speed v, and the body and platform move in the opposite direction with speed

What are some ways the oceanic crust and the continental crust are alike?

Why is gangue sometimes reprocessed.

4.7 cm. The tube is sealed at one end and loaded with lead shot to give it a total mass of M = 130 g. The tube floats in water (of density 1 g/cm3) in vertical position, loaded end down.

Why is it incorrect to say that vascular tissue, gametophytes, and fronds are all found mosses