This is about thermal expansion of water So if there are two glasses of water, one of them is +7°c and the other one is -7°c which one of them has more volume?
Options
a) +7°c
b) -7°c
c) both of them are the same
d) it’s impossible to know

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?