4. A painkilling tablet contains 154 mg caffeine, 101 mg aspirin and 0.23 g filler. Express the total mass of the tablet (in grams) to the correct number
of significant figures.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean