how many days does it take a perfect black body cube of 0.01m on a side at 30degree to radiate the same amount of energy that 100watts light bulb uses in one hour​

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero

Atoms seldom exist as independent particles in nature a) as single particles, most atoms have low potential energy b) their electronegativity is much lower when they combine with other atoms c) atoms are more stable when they combine with other atoms d) neutral particles are rare