It takes an extremely high tenpeture for nuclear to occur inside the sun

How do oceanographers measure the salinity of ocean water?

Which age groups shows the graestest diferrence between males and females

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.