A figure skater on ice spins on one foot. She pulls in her arms and her rotational speed increases. Choose the best statement below. 1. Her angular speed increases because by pulling in her arms she creates a net torque in the direction of rotation.

2. Her angular speed increases because air friction is reduced as her arms come in.

3. Her angular speed increases because her angular momentum increases.

4. Her angular speed increases because her angular momentum is the same but her moment of inertia decreases.

5. Her angular speed increases due to a net torque exerted by her surroundings.

6. Her angular speed increases because her potential energy increases as her arms come in.

Apoint charge +q is at the origin. a spherical gaussian surface centered at the origin encloses +q. so does a cubical surface centered at the origin and with edges parallel to the axes. select "true" or "false" for each statement below. the electric flux through the spherical surface is greater than that through the cubical surface. suppose (for this statement only), that q is moved from the origin but is still within both the surfaces. the flux through both surfaces remains unchanged. the area vector and the e-field vector point in the same direction for all points on the spherical surface. the e-field at all points on the spherical surface is equal due to spherical symmetry. the flux through the spherical gaussian surface is independent of its radius.