A4-m × 5-m × 6-m room is to be heated by a base-board resistance heater. it is desired that the resistance heater be able to raise the air temperature in the room from 5 to 25°c within 17 min. assuming no heat losses from the room and an atmospheric pressure of 100 kpa, determine the required power of the resistance heater. assume constant specific heats at room temperature.

To protect all four receptacles on a branch circuit that surrounds a swimming pool, you would install which of the following configurations? a. gfci feed-through receptacle at the end of the load's circuit b. gfci-terminated receptacle at the beginning of the load's circuit c. gfci feed-through receptacle at the beginning of the load's circuit and the other receptacles connected to the load side of that receptacle d. gfci-terminated receptacle at each end of the load's circuit

Can anybody me with this? ? (picture included.)

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion