The sum of the ages of a brother and sister is 26.

Give an equation that represents this statement using

b

as the age of the brother and s as the age of the sister

Four waves are produced when a harp is strummed at four different times. Which wave will produce the highest pitch?

A hot air balloon starts with its temperature at 68.7°C and a pressure of 0.987 ATM and volume of 564L at what temperature in degrees Celsius while its pressure be 0.852 ATM and its volume be 625L

Why are atoms considered the smallest particles of an element?

What volume of 11.80 mol/dm3 HCl needed to make 1 dm3 of 0.5 mol/dm3 aqueous HCl.

Identify each of the following energy exchanges as primarily heat or work and determine whether the sign of is positive or negative for the system. a. A rolling billiard ball collides with another billiard ball.

Solid lead IV oxide decomposes into solid lead and oxygen gas.

Ab2 has a molar solubility of 3.72*10-4 m. what is the value of the solubility product constant for ab2? express your answer numerically.

Thermal decomposition of sodium azide (NaN₃) into nitrogen gas and sodium metal is used to inflate car airbags. The reaction proceeds by the following chemical reaction. 2NaN₃ (s) ⟶3N₂ (g) + 2Na (s) How many grams of NaN₃ are need to inflate a 10.

Is salt water acidic, basic or neutral

The process of gathering knowledge about the natural world