Calculate the resistance of the above mentioned heater when it is connected to 220v source​

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction