Three major branches of natural science

Which element has the greatest number of valence electrons? O A. Phosphorus (P) OB. Oxygen (0) O C. Sodium (Na) O D. Magnesium (Mg)

What is the effect on the volume of a rectangular prism if the width is doubled and the hight is reduced to half of the original height? A) the volume is doubled. B) the volume is halved. C) the volume is tripled. D) the volume is unchanged.

Plants provide energy to animals for their life processes by A) providing carbon dioxide. Eliminate B) serving as a food source. C) receiving energy from the sun. D) providing shelter from weather.

10-cm-long wire is pulled along a U-shaped conducting rail in a perpendicularmagnetic field. The total resistance of the wire and rail is 0.20 Ω. Pulling the wire with aforce of 1.0 N causes 4.0 W of power to be dissipated in the circuit.

A person walks 70 m due east, turns around and walks 70 m due west. Determine the total distance, in m, this person has traveled. a) 0 b) 70 c) 140 d) 210

The four basic properties of lighting are

Which of the following is the correct SI unit to use in measuring the mass of a boulder A. ounces B. tons C. kilograms D. pounds (I'm sorry If I didn't pick the right subject!)

Which of the following can be thought of as either a wave or a particle? a. light b. an electron c. a proton d. all of the above

Universal law in effect at all times?

Elements in an blank or blank of the periodic table have similar characteristics