physics

4. A microwave oven uses an electronic device called a magnetron to produce microwaves. Microwaves
commonly used in ovens have a frequency of 2,450 MHz. (MHz = 106 Hz) The microwaves then pass into
the enclosed metal oven cavity where they are reflected around the oven walls and absorbed by food or drink placed in the oven. This is how microwave ovens heat food.

a. What is the wavelength of the microwaves used in this microwave oven?
b. What is the energy per quantum of this microwave oven?
c. How many quanta of 2,450 MHz.microwave energy are in 1.00 J of energy

  1. 👍
  2. 👎
  3. 👁
  1. a. wavelength = speed of light / frequency = (3E10 cm/s) / 2.45E9 hz

    b. energy = frequency * Planck's constant

    c. divide 1.00 J by the result in b.

    1. 👍
    2. 👎
  2. What is Planck's constant?

    1. 👍
    2. 👎
  3. 6.62607004 × 10-34 m2 kg / s

    1. 👍
    2. 👎
    👤
    bobpursley

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Enormous numbers of microwave photons are needed to warm macroscopic samples of matter. A portion of soup containing 177 g of water is heated in a microwave oven from 20degrees Celsius to 98 degrees Celsius, with readiation of

  2. Earth Studies

    Which type of electromagnetic radiation has more energy than visible light and can pass through the human body? A. X-rays B. radio waves C. ultraviolet light D. microwaves 2. Which information about objects in space can

  3. Chemistry

    Microwaves are used to heat food in microwave ovens. The microwave radiation is absorbed by moisture in the food. This heats the water, and as the water becomes hot, so does the food. How many photons having a wavelength of 3.00

  4. Check my answers?--SCIENCE

    1. What is true about X-rays and microwaves? a. X-rays have greater speed than microwaves. b. X-rays have greater amplitude than microwaves. c. X-rays have greater frequency than microwaves. d. X-rays have greater wavelength than

  1. Science

    Bart believes that mice exposed to microwaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice in a microwave for 10 seconds. He compared these

  2. Physics Help Please!

    A microwave oven operates at 2.80GHz . What is the wavelength of the radiation produced by this appliance?

  3. Calculus (Derivatives)

    A tray of lasagna comes out of the oven at 200°F and is placed on a table where the surrounding room temperature is 70°F. The temperature T (in °F) of the lasagna is given by the function T(t) = e^(4.86753 - t) + 70, where t is

  4. phyical science

    On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23 min. Using the power requirements given in the table below, find how much it costs to use the appliances

  1. PHYSICS

    The microwaves in a microwave oven are produced in a special tube called a magnetron. The electrons orbit in a magnetic field of 9.3×10−2 T at a frequency of 2.6 GHz, and as they do so they emit 2.6 GHz electromagnetic waves.

  2. physics

    Microwave ovens typically cook food using microwaves the a frequency of about 3.00 GHz (gigahertz 10 to the nine Hz). Show the wavelength of these microwaves traveling at the speed of light is 10cm.

  3. Science

    1.Infrared radiation has wavelengths ranging from about 800 nm to 1 mm. What is the frequency of radiation of wavelength 970 nm? Answer in units of s−1 . 2.Microwaves, such as those used for radar and to heat food in a microwave

  4. Chemistry

    A microwave oven operates at 2.40 GHz . What is the wavelength of the radiation produced by this appliance?

You can view more similar questions or ask a new question.