a microwave operates at a frequency of 2400 MHZ. the height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm. assume that mi

Question

a microwave operates at a frequency of 2400 MHZ. the height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm. assume that microwave energy is generated uniformly on the uipper surface. What is the power output of the oven

in progress 0
Khánh Gia 3 years 2021-07-16T01:59:34+00:00 1 Answers 5 views 0

Answers ( )

  1. sori
    0
    2021-07-16T02:00:50+00:00
    Reply

    Complete question is;

    A microwave oven operates at a frequency of 2400 MHz. The height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm. Assume that microwave energy is generated uniformly on the upper surface of the cavity and propagates directly

    downward toward the base. The base is lined with a material that completely absorbs microwave energy. The total microwave energy content of the cavity is 0.50 mJ.

    Answer:

    Power ≈ 600,000 W

    Explanation:

    We are given;

    Frequency; f = 2400 Hz

    height of the oven cavity; h = 25 cm = 0.25 m

    base area; A = 30 cm by 30 cm = 0.3m × 0.3m = 0.09 m²

    total microwave energy content of the cavity; E = 0.50 mJ = 0.5 × 10^(-3) J

    We want to find the power output and we know that formula for power is;

    P = workdone/time taken

    Formula for time here is;

    t = h/c

    Where c is speed of light = 3 × 10^(8) m/s

    Thus;

    t = 0.25/(3 × 10^(8))

    t = 8.333 × 10^(-10) s

    Thus;

    Power = (0.5 × 10^(-3))/(8.333 × 10^(-10))

    Power ≈ 600,000 W

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )