Using echos to find an object

Why do atoms tend to combine with other atoms instead of existing as single atoms?

Which transition represents a time when water molecules are moving closer together? A. Frost forms on a window pane. B. Dew forms on the grass. C. A puddle disappears. D. Sleet turns to rain.

7. What does the slope of a position-time graph represent? a. Velocity b. Acceleration c. Displacement d. Position

Which of these statements best proves that electromagnetic forces are weaker than strong nuclear forces? Neutrons do not repel or attract each other when they are in the nucleus.

What is the resistance of a nichrome wire at 0.0 ∘c if its resistance is 120.00 ω at 11.5 ∘c?

1 A plane moving at 30m/s drops a load 200m down to the ground. How long did it take to hit the ground.

Can a body be in equilibrium if it is in motion? Explain

What is the average speed in kilometers per second of the earth around the sun?

Why does a dog circle its bed before lying down

5. Which answer correctly summarizes the essential elements of a scientific theory?. A. descriptions of the natural world; based on many observations and data; do not explain why. B.