500 cm3 of water is to be heated from room temperature (28°c) to 100°c In order to prepare hot cup of coffee
What to the minimum heat required?
How Long with It takes to heat
the water with a 1000w heating
coil which has a
heating efficiency
of 70% ?​

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

gravitational energy

electrical energy

kinetic energy

ligh energy