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Questions in physics

[Answered] The way the brain perceives the intensity of a sound is:

[Answered] You drop your backpack out of a window from a height of 8.3 m. What is the impact speed of your backpack? A. 163 m/s B. 1.2 m/s C. 21.3 m/s D. 12.8 m/s

[Answered] What is an example of a high amplitude sound, and an example of a low amplitude sound?

[Answered] A 4-kilogram ball moving at 8 m/s to the right collides with a 1-kilogram ball at rest. After the collision, the 4-kilogram ball moves at 4.8 m/s to the right. What is the velocity of the 1-kilogram ball?

[Answered] How do biotic and abiotic conditions change during secondary succession?

[Answered] Since the Wagon is being pulled down hill is it increasing (C)

[Answered] How does air resistance affect the velocity of a falling object?

[Answered] Describe two ways to change the frictional force between two solid surfaces.

[Answered] A small child has a wagon with a mass of 10 kilograms. The child pulls on the wagon with a force of 2 newtons. What is the acceleration of the wagon?

[Answered] The density of mercury is 13.6 g/mL. What is the volume of a 155-gram sample of mercury?