Answer:
900,000,000 Joules
Explanation:
Power is the rate of using energy, which is measured in Watts, where 1 Watt=1 Joule per second (1W=1 J /s ). So 1 kWhr = 1000 J /s x 3600s or 3,600,000 Joules. 1 kiloWatt = 1000 Watts, so 250 kWhr = 250 x 3,600,000 J = 900,000,000 Joules
Answer: D
An iron rod used for beating down the earthy substance in tamping for blasting.
I don't know but it might be B