A metal bar in a low temperature physics experiment with mass m = 93 kg had its temperature raised from T1 = 28 K to T2 = 47 K. The metal bar has a specific heat that is a function of temperature: c(T) = A + αT, where A = 430 J/(kg⋅K) and α = 10.2 J/(kg⋅K2). Note the metal bar does not change in volume as it is heated.

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

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

In what direction does an applied force move an object