Which are ways to improve the design of this experiment? check all that apply.

a. reduce the sample size so the experiment can be done faster.
b. increase the sample size from 6 cups to 12 cups of sand and water.
c. use more legible handwriting when recording data.
d. use more precise digital thermometers.
e. use more precise scales that measure to the hundredth of a gram.

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?