What is the difference between balanced forces and unbalanced forces? Group of answer choices

A. They are the same

B. None of the above

C. Balanced: object's speed and direction of motion won't change (constant velocity), Unbalanced: speed changed (acceleration)

D. Balanced: speed changed (acceleration), Unbalanced: object's speed and direction of motion won't change (constant velocity)

What kind of waves require a medium to travel? question 6 options: light waves mechanical waves all waves need a medium to travel electromagnetic waves

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency

1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted