Planets in our solar system do not revolve around the sun in perfect circles. Their orbits are more like ovals that scientists describe as which of the following?

A.

revolutionary

B.

rotational

C.

periodical

D.

elliptical

When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is the?

Many pain relief pills have powder that is enclosed inside a capsule. Why might this type of medicine work faster than a tablet if they both have the same amount and type of medicine?

A Student Formulated A Hypothesis That Cotton Will Grow Larger Bolls (Pods) If Magnesium Is Added To The Soil. The Student Has Two Experimental Fields Of Cotton, One With Magnesium And One Without.

Select all that apply. Select the items that have a pH level between 5 and 8. - pure water - Great Salt - Lake - saliva - ammonia

A 1.2 L weather balloon on the ground has a temperature of 25°C and is at atmospheric pressure (1.0 atm). When it rises to an elevation where the pressure is 0.74 atm, then the new volume is 1.8 L.

Which of the following requires an oxidizing agent? Al yields Al3+ 2 O yields O2 Cl2 yields 2 Cl- Ag + yields Ag

If a color change occurs when two solutions are mixed has a chemical reaction likely occurred?

Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca (OH) 2 (aq) + 2HCl (aq) → CaCl2 (aq) + 2H2O (l) CaO (s) + 2HCl (aq) →CaCl2 (aq) + H2O (l), ΔH = - 186kJ CaO (s) + H2O (l) →Ca (OH) 2 (aq), ΔH =

1. Calculate the end velocity of a rocket that traveled 16km in 2 seconds. distance time 2. Calculate the rockets acceleration m with a start velocity of 0m/s and the end velocity from #1 for 10 seconds.

How are linear and nonlinear graphs alike