Which of these is an example of a chemical change?

Question 4 options:

fireworks exploding

grinding powder

melting cheese

ironing a shirt

Speed is a component of skill-related fitness. What does speed enable you to do?

What is true about scientific "law"? all experiments appear to "prove" the theory all predicted observations are verified the law is repeatable no exceptions to the law are known all of the above

A parallel-plate capacitor has an area of 4.59 cm2, and the plates are separated by 1.28 mm with air between them. it stores a charge of 334 pc. what is the potential difference across the plates of the capacitor?

A heat engine is a device that uses to produce useful work.

The mechanical energy of a football during a pass is A. potential energy B. kinetic energy C. gravitational potential energy D. potential and kinetic energy

Ovens, toasters, dryers, and heat lamps are examples of inventions that convert electrical energy to thermal energy, which is a kind of kinetic energy.

Why does Alpha Centauri appear to be yellow-white?

In order to determine speed, you must know

Which of the statements best describes the relationship between the surface of an object and the amount of friction it produces? A.) The smoother the surface of an object, the more friction it will produce. B.

Laboratory measurements show hydrogen produces a spectral line at a wavelength of 486.1 nanometers (nm). A particular star's spectrum shows the same hydrogen line at a wavelength of 486.0 nm. What can we conclude