An unknown metal of mass 512 g, at a temperature of 15 °c, is dropped into 325 g of water held in a 100-g aluminum container at a temperature of 98 °c. if the system reaches thermal equilibrium at 78 °c determine the specific heat of the unknown metal. note: t(k) = t(c) +273. the specific heat of aluminum 900 j/kg/k. the specific heat of water = 4190 j/kg/k (a) 485 j/kg/k (b) 900 j/kg/k (c) 1800 j/kg/k (d) 655 j/kg/k

(science)study the following ocean currents map. an ocean currents map is shown. on the map the locations for san diego, california and savannah, georgia are marked. there is a looping current from the north past san diego and a looping current from the south near savannah which statement is most likely correct about the average temperatures in san diego, california as compared to savannah, georgia? it is higher in savannah because of the cool ocean currents from the south. it is higher in savannah because of the warm ocean currents from the north. it is lower in san diego because of the warm ocean currents from the south. it is lower in san diego because of the cool ocean currents from the north.

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

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