Scientific notation 8.0 x 105 -9.2 x 105
-1.2x10-5
-1.2 x1010
1.2 x105
-1.2 x105

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Draw the lewis dot structure for each of the following polyatomic ions

No copying 15 pts how does a free-body diagram tell you about the net force on an object?