What causes the weight of an object to change depending on if it is on earth or the moon?

Alivestock company reports that the mean weight of a group of young steers is 1100 pounds with a standard deviation of 93 pounds. based on the model n(1100,93) for the weights of steers, what percent of steers weigh a) over 1050 pounds? b) under 1300 pounds? c) between 1150 and 1250 pounds?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Which best represents the law of conservation of mass ?