1. Questions

Physics

1)Which of the following statements about X rays is incorrect?

A)x rays darken photographic plates
B)x rays can penetrate soft body tissue
C)the kinetic energy of high speed electrons is converted to x rays when they collide with matter.
D)x rays can easily penetrate bones and any thick material

I got D

2)An electromagnetic wave has a frequency of 2.90 x 10^14 Hz. What is the wavelength of the wave?

3.00 x 10^8/2.90 x 10^14
= 1.03 x 10^-6 m

  1. 👍 0
  2. 👎 0
  3. 👁 507
Jon

  1. yes, on both.

    1. 👍 0
    2. 👎 0
    👨‍🏫
    bobpursley

  2. Fist right-hand rule: is a method you can use to determine the direction of a magnetic field relative to the direction of conventional current.

    Second right-hand rule: is a method you can use to determine the direction of the field produced by an electromagnet relative to the flow of conventional current.

    Third right hand rule: the direction of the force on a current-carrying wire in a magnetic field can be found by this rule.

    Fourth right-hand rule: to find the force on the charges in the wire use this rule

    1. 👍 0
    2. 👎 0
    Jon

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science

    1. Which of the following statements about mechanical waves is true? a. mechanical waves require a medium to travel through b. mechanical waves do not have amplitude and wavelength c. mechanical waves do not have frequency d.

  2. physics

    In a dentist's office, an X-ray of a tooth is taken using X-rays that have a frequency of 7.01 1018 Hz. What is the wavelength in vacuum of these X-rays?

  3. Science

    A scientist studying the effects of gamma rays on marigolds gathered the data shown below. Hypothesis: Marigolds exposed to higher levels of radiation will not grow as well as marigolds that are exposed to less radiation Plant A:

  4. Science

    A model shows rays of sunlight moving straight from the sun perpendicular to the surface of the earth. What are these rays called?

  1. Math

    It is a beautiful sunny day at the fair. The U.V. index for this day is 8, or high, so sunscreen is a must for all the young folk. The effectiveness of sunscreen is indicated by the sunscreen protection factor (SPF). The higher

  2. Science

    A scientist studying the effects of gamma rays on marigolds gathered the data shown below. Hypothesis: Marigolds exposed to higher levels of radiation will not grow as well as marigolds that are exposed to less radiation Plant A:

  3. Science

    2. Which waves have the longest wavelength and lowest energy on the electromagnetic spectrum? (1 point) a. X-rays b. infrared c. radio waves d. gamma rays

  4. Science HELP!!!!

    Which waves have the longest wavelength and the lowest energy on the electromagnetic spectrum? 1. X-rays 2. infrared 3. radio waves 4. gamma rays

  1. Science--Check My Answers?

    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

  2. Physics

    The linear absorption coefficient for 0.05 nm x-rays in lead and in iron are respectively, 5.8x10(4) /m and 1.1x10 (4) /m. How thick should an iron shield be in order to provide the same protection from these x-rays as 10 nm of

  3. Astronomy

    Based on what you learned about light, select all of the correct statements from the following list. The only type of electromagnetic radiation that is actually considered light is visible light. High frequency photons carry more

  4. Science HW - - - check my answers?

    1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy? a. wave A; wave A b. wave A; wave B c. wave B; wave A d. wave B; wave B 2. Which waves have the longest

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