The equation E = MC squared relates energy and 1. Force 2. Gravity 3. Mass 4. Work

What is an artificial situation in which a scientist deliberately makes certain changes in the world about him so that he can observe the consequences?

A charge of 0.01 C is in a 120 N/C electric field. What is the force on the charge?

The cheetah can maintain its maximum speed for only 7.5 s. What is the minimum distance the gazelle must be ahead of the cheetah to have a chance of escape? (After 7.5 s the speed of cheetah is less than that of the gazelle.) Answer in units of m.

How do molecular compounds come to have a slight electrical charge

The differential distribution of ions across the cell membrane is due to the: A. A lack of cell ATP B. Difference in permeability of the cell membrane to ions C. Resting membrane potential D. Na+-K+-ATPase pump

During a medical condition screening lung capacity testing is a standard procedure. True of false

Which of the following is a unit of energy found in food? a). vitamin b) calorie c) nutrient d) water

As one goes from left to right in a period, which of the following is true? A. The number of protons decreases. B. The number of valence electrons increases. C. both A and B D. none of the above

Which of the following surfaces reflects the most light A yellow cloth B. tree trunk C aluminum foil D. Concrete sidewalk

Which part of an atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom? A. nucleus B. electron C. proton D. electron cloud