Andrew is observing the changes of state when an ice cube is slowly heated from -10c to 110c.
a. the molecules escape the liquid state and become a gas.
b. the ice cube becomes water vapor.
c. the molecules in the water stay fixed and the ice is solid.
d. the ice changes to a liquid and the molecules in the water move faster.

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat