1. Describe three parts of the experimental procedure used to study electromagnets that you think were essential to getting good results. 2. How did building and testing an electromagnet help you better understand electricity and magnetism?

3. How would you know that the magnetism of an electromagnet occurs because of an electric current? How would you know the magnetism was not from another source?

4. Power lines carry electricity constantly. What does this mean about the area around the power lines?

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

Which feature of a heating curve indicates a change ofn state

What is the scientific definition of energy that relates to work