The element copper has 29 protons. What is the atomic number of copper?

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

Identify some abiotic characteristics of the tundra biome.