How does a thermos keep hot drinks hot?

A: By absorbing radiant energy that might enter the thermos
B: By limiting the amount of thermal energy that flows out of the drink
C: By limiting the amount of cold that flows into the drink
D: By transmitting radiant energy into the thermos

Which statement best describes resistance? resistance is a. how well a current will flow in a material and is measured in volts. b. how well a material conducts an electrical charge and is measured in ohms. c. the ability of a material to attract a positive charge to create a current. d. the ability of a material to repel neutral charges and is measured in ohms.

Porque crees que el agua no podia subir mas de 10 m de altura con ese tipo de bomba

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction