If t is the absolute temperature, the intensity of radiation from an ideal radiator will be proportional to (a) t (b) t (c) t (d) t (e) none of the above

T^4

Explanation:

According to the Stefan's law, the energy radiated per unit time and per unit area is directly proportional to the four power of teh absolute temperature of the black body.

E ∝ T^4

prndulum needs thread, weight clock to time swings

1) estimating temperature to the nearest tenth of a degree

2) estimating the mass of the sample to the nearest tenth of a gram

4) the position of the cups of sand and water under the heat lamp