Which of these is a mixture of compounds?

A) sodium (NA) and magnesium (Mg)

B) lithium (Li) and table salt (NaCl)

C) CO2 and CH4

D) hydrogen (H2) and oxygen (O2) combining to make water H2O

Which statement best explains why objects are pulled towards earth's center

Two different polymeric materials were evaluated to determine their respective fatigue endurance behavior. Both materials were tested separately in laboratory air and in flowing water.

An 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate: the force of wagon 1 on wagon 2?

In a tug of war between Mrs. Brenneman and Mr. Schroedl seems at a standstill. Then Mrs. Brenneman tugs hard giving a force of 40 N to the left, while Mr. Schroedl is only pulling 30 N to the right. What is the net force that Mr.

If an astronaut takes an object to the moon the following is true (choose only one). A the mass will change but the weight will be the same. B both the mass and the weight of the object will be the same.

Atoms are the smallest portions of an element that retain the original characteristics of the element. True or false

Which statement is true about light when it slows down upon entering another medium A. Light bends less, and there is a greater refraction B. Light bends more, and there is a greater refraction C. light bends less, there is a less refraction D.

Why can you cross sentran type of animals

The element in an incandescent lightbulb that releases light energy is

A soda bottle is flexible enough that the volume of the bottle can change even without opening it. If you have an empty soda bottle (volume of 2.0 L) at room temperature (25 0C), what will the new volume be if you put it in your freezer (-4.0 0C) ?