Pyrite is a mineral which is made from iron and sulfur atoms. Choose all of the statements which are correct The smallest unit of pyrite is a sulfur or iron atom.
The smallest unit of pyrite is a molecule containing iron and sulfur.
all of the above
The element called sulfur is made of sulfur atoms.

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.