To calculate the amount of energy transferred by heat to or from an object you must know the mass of the object and what else? ?

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

In an experiment, how can i change human errors? be specific.