Why do animals float when they die

Elements on the Periodic Table of the Elements are classified into categories such as (1) rocks and minerals (2) molecules and atoms (3) mixtures and compounds (4) metals and nonmetals

hot-air balloon is ascending at the rate of 14 m/s and is 84 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?

The charge on an ion is A always positive. B zero. C always negative. D either positive or negative. 2. According to the octet rule, a calcium atom has a tendency to A lose one electron. B gain two electrons. C lose two electrons.

Lin Yao looks at the back of a spoon. How should she describe her reflection?

The amount of energy transferred to electrons by ionizing radiation is the basis of the concept of: A. electromagnetic radiation B. nuclear power C. radioactive decay D. radiation dose

If you push against a stationary object for 10 seconds, you have performed an: a. eccentric exercise. b. isokinetic exercise. c. isometric exercise. d. isotonic exercise

Does the size of the particles change as the substance changes state?

If a ball is thrown vertically into the air in the presences of air resistance, would you expect the time during which it rises to be longer or shorter than the time during if falls?

The process of deformation due to plate movements that changes earth's surface is called

If the frequency of a sound wave is 250 hertz and its wavelength is 1.36 meters, what is the wave's velocity?