Ametal spoon sits in a pot of boiling water. the spoon becomes warm. which types of heat transfer contribute to the increase in temperature of the spoon? convection and radiation
convection and conduction
radiation and conduction
radiation only

Your answer is B. convection and conduction 
The spoon gets hot because metals are good conductors . Meaning that heat, cold, electricity move through them, certain metals are better than others. Even a wood spoon will conduct if it is soaked in water, of course in this case the water is the conductor.

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Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f.