The heating element of an electric dryer is rated at 4.1 kW when connected to a 240-V line. (a) What is the resistance of the dryer’s heating at its operating temperature? (b) At 15.2 cents per kWh, how much does it cost per hour to operate the dryer?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.