4. a metal fork has a density of 7.8 g/cm ³. is this fork made up of aluminum? 5. a glass marble has a volume of 5cm ³ and a mass of 13 g. what is the density of the marble

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

What causes the formation of ocean currents?