Answer:
3521 seconds
Explanation:
The power that the television uses is calculated multiplying the current by the voltage:
P = I * V
with I = 0.71 A and V = 120 Volts, we have:
P = 0.71 * 120 = 85.2 W
To find the time it takes to consume 3*10^5 Joules, we need to know that the total energy consumed is equal to the power times the amount of time, so:
E = P * t
with E = 300000 and P = 85.2, we have:
300000 = 85.2 * t
t = 300000/85.2 = 3521.13 seconds = 3521 seconds
Answer:
3521 s
Explanation:
Using
E = VIt...................... Equation 1
Where E = Energy consumed by the television, V = Voltage connected to the television, I = current drawn by the television, t = time.
Make t the subject of the equation
t = E/VI.................... Equation 2
Given: E = 3.0×10⁵ J, V = 120 V, I = 0.71 A
Substitute into equation 2
t = 3.0×10⁵/(120×0.71)
t = 3.0×10⁵/85.2
t = 3.52×10³ s = 3521 s
Hence the time taken for the television to consume 3.0×10⁵ J of electronics energy = 3521 s
