Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid

What are the two most reactive groups of elements in the periodic table?

When a person does work on an object, the object gains energy. As a bicycle rider rides from the bottom of a hill up a hill, the energy from the work being can become which combination of types of energy.

Identify the scientific law from among the following statements. A) The book fell 1 meter in 0.5 seconds B) Gravity acts upon each object on the Earth. C) The velocity of the book is 2 meters/second.

Any motion that is regular and repeating is referred to as a periodic motion. Most objects that vibrate do so in a regular and repeated fashion much like this spring seen here.

A transverse wave with a frequency of 125 Hz is traveling in the x-direction. How long will it take this wave to travel 3000 m in the x-direction? 0.42 seconds 2.0 seconds 2.4 seconds 4.8 seconds

Question 11 1 pts Nuclear power plants rely on to generate power. O climate change O fusion Ofission O coal

Which of the following is not a characteristic that geologists use to identify minerals? A. Softness B. Color C. Streak D. Fracture

To practice Tactics Box 10.1 Calculating the work done by a constant force. To find the work done on an object by a force, begin with a visual overview and follow Tactics Box 10.1.

the color of the sun appears to be orange or yellow when looking from the earth but it really is red. true or false

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? 1 - positive 2 - negative 3 - zore