Answer:
1. 600 watts
2. 35640 J
3. 55%
4. 20 J
5. The cost of running the fire is 8p.
Step-by-step explanation:
1. Energy = 36 000 J , t = 1 minute = 60 seconds
Power = 
= 
= 600 watts
2. Power = 
⇒ work done = Power × time
= 99 × 360
= 35640 J
3. Efficiency = (Output / Input) × 100
= 
× 100
= 55%
4. Work done = Force × distance
= 5 × 4
= 20 J
5. Given that 1 KWh cost 2p, Power = 4 KW and time = 4 hours.
Power =
Energy = Power × time
= 4 × 4
= 16 KWh
The cost of running the fire = 
= 8p
Answer:
b
Step-by-step explanation:
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Answer:
um your supposed to press the negative ten (-10)
Step-by-step explanation:
Answer:
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Answer:
PArt 1: 4/40 (not simplified) 1/10 (simplified)
Part 2: 8/40 (not simplified) 2/10 (simplified)
Step-by-step explanation:
add all the marbles together and you get 40. there are 4 colors in the jar but with different amounts, you will divide 40 into each amount of marbles (example: 40/4 = 10 = there are 4 10s in 40).
