Must new substance be formed when you observe property

The Products in a Combustion reaction are always water and oxygen True or false?

The pressure inside a bottle of champagne is 5.99 atm higher than the air pressure outside. The neck of the bottle has an inner radius of 1.46 cm. What is the frictional force on the cork due to the neck of the bottle

if a wave has a period frequency of 25 hz what is the period of wave in seconds round to 3 decimal places

A car has speed of 2m/s and a mass of 1500kg. what is the car's kenetic energy?

Which of the following energy sources is expected to have the highest rate of consumption in 2030? a. coal b. natural gas c. nuclear d. renewable energy

What basic form of energy is present in blowing wind?

A wave with a frequency of 30 Hz has a wavelength of 40.5 m. How fast is the wave traveling?

A soccer ball is sitting in the middle of a soccer field during a game. When the referee blows his whistle, one of the players runs toward the ball and kicks it as hard as he can.

A body with v=20m/s changes its speed to 28m/s in 2sec. its acceleration will be

Charge: A piece of plastic has a net charge of + 2.00 μC. How many more protons than electrons does this piece of plastic have? (e = 1.60 * 10-19 C)