g This question reviews charges and material properties from early in the semester. (In the notes, this is Week 1 - Charges and Matter.) (a) In any neutral object, there is an equal number of positive and negative charges in the object. there are no charges in that object. there is no way to tell what kind of charges there are in the object. (b) In any conductor, no charges are free to move in the material. electrons are free to move in the material. protons are free to move in the material. electrons and protons are free to move in the material. (c) In any insulator, no charges are free to move in the material. electrons and protons are free to move in the material. electrons are free to move in the material. protons are free to move in the material.

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy. work depends on the square of the change in potential energy. work is equal to the negative of the change in kinetic energy. work is equal to the square of the change in kinetic energy

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j. b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

In general what determines whether atoms will form chemical bonds?