A high speed 2L electric water heater is heated by a 2.5 kW heating element. How long does it take to have boiled water. After boiling water, we pour the boiled water to a open glass bottle to let the water cool down. Heat lose at the rate of 500 W to surrounding environment. How long do we have to wait to drink the water at 300C

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

Apatient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn’t healed in a long time. what vitamin deficiency most likely caused this symptom?

If element x has 99 protons how many electrons does it have