A panel of solar cells for a street lamp needs to provide a mean power output of 40 W, Use Figure 2 to suggest the minimum surface area to use for the street lamp,
Surface area - ,
Ruggest one reason, other than cost, for not using a panel of solar cells bigger than
he one you suggested in part (ll)
Upper Batley High School

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.