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:
D
Step-by-step explanation:
only solution C and D are linear function, and they are essentially straight lines. However, C have a x intercept of 5/2, so we rule out option C.
Answer:
dam i would of helped you but I forgot how to do this
Answer:
Alright i'm just going to assume your doing both of them one at a time.
y + 2x = - 1: So Alright Graph using the slope and y-intercept
Slope: - 2
Y-intercept: - 1
And the other
- 3x = 16: same as well So the Answer to this is Except solve for x by simplifying both sides of the equation, then isolating the variable
Exact form: x = - 16/3
Decimal form: x = - 5.3 Well Hope this helps :)
Step-by-step explanation:
Answer:
5%
Step-by-step explanation:
I = P × R × T
420 = 1400 × R/100 × 6
R = 420 / 84 = 5%
