A roller coaster travels 27.7 m at an angle of 40 degrees above the horizontal. How far does it move horizontally? How far does it move vertically?

He viscosities of several liquids are being compared. all the liquids are poured down a slope with equal path lengths. the liquid with the highest viscosity will

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.

Why is the basic problem of economic,scarcity, a universal problem?