an iron rod of length and diameter at 10 degree Celsius is used to measure a distance of 2 kilometre on a day when the temperature is 40 degree Celsius calculate the year error in measuring the distance.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Which of the following are guidelines to follow for obtaining accurate observations

Your science teacher brings in a speaker to talk to your class about climate change. during the session, students ask a few questions. which questions are related to the current evidence on climate change