The dimmer star in a two-star system passes in front of the brighter star. Which phenomenon does this describe?

-nebular cluster

-global cluster

-wobbling binary

-eclipsing binary

Sepration of all types of techniques of Matter

17. Which of the following describes a condition in which an individual would not hear an echo? A. An individual is standing 30 meters in front of the reflecting surface. B. The reflecting source is approximately 21.5 meters from the individual. C.

What is the name of the engineer who investigated the efficiency of steam engines? Michael Faraday O Frederic Tudor OSadi Carnot O Robert Boyle

Whom did the report blame for greenhouse gas emissions?

Is breaking bottles a physical or chemical change? Explain why?

Calculate the coulombic force (in Newtons) felt by an electron and a proton separated by a distance of 1 angstrom. An angstrom is 10-10 meters.

Why does stirring increase the rate of dissolution? A. Stirring the solution decreases the kinetic energy of the solution. B. Stirring the solution increases the surface area of the solution. C.

How many moles of ba (oh) 2 are present in 275 ml of 0.200 m ba (oh) 2?

The molecular weight of vitamin C, CH06, is 176.12 8 mol What is the mass, in grams, of 0.000142 mol of vitamin C? Express the answer using 3 significant figures. 09

When The reaction below demonstrates which characteristic of a base? Upper C U upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper C u (upper O upper H) subscript 2 (s) plus upper N a subscript 2 upper S upper