12 SEATWORK 11 1.What is the energy used in this situation: A 1400-W blow dryer is used for 2 hour? 2. Someone watches TV with a 110-W on average of 7 hours each day. If the electric company charges Php 9.34 per kWh, then the cost of using electric energy for TV for 1 month (30 days) is...​

1. Energy Used by a 1400-W Blow Dryer for 2 Hours To calculate the energy used, we can use the formula: Energy (in kWh) = [tex]\frac{Power (in W) \times Time (in hours)}{1000}[/tex] For the blow dryer: Power = 1400 WTime = 2 hours Now, plug the values into the formula: Energy = [tex]\frac{1400 W \times 2 hours}{1000} = \frac{2800 Wh}{1000} = 2.8 kWh[/tex] So, the energy used by the blow dryer for 2 hours is 2.8 kWh. 2. Cost of Using a 110-W TV for 30 Days First, we need to calculate the energy consumed by the TV: Daily Energy Consumption: Energy (in kWh) = [tex]\frac{Power (in W) \times Time (in hours)}{1000}[/tex] For the TV: Power = 110 WTime = 7 hours/day Daily Energy = [tex]\frac{110 W \times 7 hours}{1000} = \frac{770 Wh}{1000} = 0.77 kWh[/tex] Monthly Energy Consumption: To find the monthly consumption, multiply the daily energy by the number of days in a month (30 days): Monthly Energy = 0.77 kWh/day × 30 days = 23.1 kWh Cost Calculation: The electric company charges Php 9.34 per kWh. Now, we can calculate the total cost: Cost = Monthly Energy × Cost per kWh Cost = 23.1 kWh × 9.34 Php/kWh ≈ 215.23 Php So, the cost of using electric energy for the TV for 1 month (30 days) is approximately 215.23 Php.

Answered by chaser27 | 2025-03-16