A gas can compress and change shape easily. How do these properties relate to the motion of atoms in a gas?
The atoms in a gas vibrate and are very close together.
The atoms in a gas vibrate and have a lot of space between them.
The atoms in a gas move about freely and are very close together.
The atoms in a gas move about freely and have a lot of space between them.

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Does anyone have the answers to online physics course plato course physics, semester a v3.0

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.