what chemical change occurs when a movie reactive substance replaces a less reactive substance in a compound

If Star A is twice as far as Star B, and they are identical in all other ways, then the brightness of Star A would be

How many chromosomes does each human cell contain?

I'm which medium does sound travel fastest railroad track or across the room

What is an example of a sting nuclear force? A.) stability of an atom B.) a book at rest C.) attraction between the opposite poles of a magnet D.) downward acceleration of an object Thrown up into The air

Which are the three types of mutations? A. deletion B. replication C. insertion D. multiplication E. substitution

Consider the moment when the spring is at its maximum compression. At that moment, the kinetic energy, the gravitational potential energy, and the elastic potential energy are, respectively, a - zero, at a maximum, and at a maximum b - at a maximum,

Ari, a young patient who is regularly treated by a psychiatrist, feels compelled to carry out repetitive tasks the same way very frequently. If Ari does not conduct these tasks with extreme precision, he can feel extremely nervous and uncomfortable.

A friend says, "Stars produce energy by a fusion chain reaction of helium into hydrogen." Evaluate the validity of this statement. A) It is an valid statement. Stars produce energy by a fusion chain reaction of hydrogen into helium.

If the mass of a material is 42 grams and the volume of the material is 15 cm^3, what would the density of the material be? answer: Unit:

35. An object of mass m moving at speed v0 strikes an object of mass 2m which had been at rest. The first object bounces backward along its initial path at speed v0.