The amount of energy needed to change 25 g of −30°C ice into 0°C liquid water is _. A. 9,887.5 J

B. 1,537.5 J

C. 58,037.5 J

D. 8,350 J

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.

Which atomic model was proposed as a result of j. j. thomson’s work?

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and