What is the speed of a 50 g rock if its de broglie wavelength is 3.32x10^-34m?

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

Why should seat belts not be mandatory quick plz

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?