An opaque spherical body of radius 1 km has a uniform photon intensity of 1 photon cm-2 s-1 hz-1 sterad-1 at frequencies between 1014 and 1015 hz. at all other frequencies it does not emit. what is its total luminosity in erg s-1?

The specific heat of silver is 0.057 calories/gram°c. if 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°c, how many calories of heat energy were absorbed by the sample?

F500 j of energy were added to 1 kg of each of these samples, which would experience the least temperature increase?

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it