In a round trip to Mars, calculate how much more radiation would astronauts be exposed to compared to an average CT scan. About 7 times moreAbout 70 times moreAbout 700 times moreI'm not sure

Which of these quantities impacts on the equivalent dose? Select all that apply. Marks will be deducted for any incorrect responses.Group of answer choicesAbility of the tissue to absorb the radiationThe degree to which the particular type of radiation can cause biological damageEnergy flux of the incident radiationTime over which the radiation is applied

Which of the following forms of background radiation contributes most to the radiation dose which the average person in the United Kingdom receives?Radon gasNuclear weapons and the fallout from past nuclear accidentsMedical proceduresFood and drink2Which of the following forms of background radiation contributes least to the radiation dose which the average person in the United Kingdom receives?Cosmic raysNuclear weapons and the fallout from past nuclear accidentsGround and buildingsRadon gas3Using a GM tube which has been connected to a rate meter, a scientist measures the background count rate to be 8 counts per second.  When a source is placed in front of the GM tube, the count rate increases to 64 counts per seconds.  Calculate the corrected count rate due to the source.72 counts per second32 counts per second8 counts per second56 counts per second4The corrected count rate from a source is 96 counts per second, and the half-life of the source is 10 seconds.  Calculate the corrected count rate after 30 seconds.32 counts per second24 counts per second12 counts per second48 counts per second

(d) Which of the following factors determine the impact of exposure to radioactivity? A. Distance from source B. Duration of exposure C. Type of radiation D. All of the above

Calculate the absorbed dose received by a 150 g tumour irradiated with 12 J of gamma-ray energy.Hint: Don't forget the units!

The scientific unit of measurement used to measure the dose received from radiations, such as X-rays or background radiation, is the millisievert (mSv). The table shows the X-ray dose resulting from CT scans of various parts of the body. The table also frequencywavelengthfrequency = wave speed / 1500(3.0*10^8)/1500 = 2*10^5Hz2*10^5can cause burnscan cause skin cancerradiographythe ability to penetrate the skin and tissue but not the bone allowing for an imageof the bones to be createdPage 18 shows the time it would take to get the same dose from background radiation. Part of the body X-ray dose in mSv Time it would take to get the same dose from background radiation Abdomen 9.0 3 years Sinuses 0.5 2 months Spine 4.0 16 months A student suggests that the X-ray dose and the time it would take to get the same dose from background radiation are directly proportional. Use calculations to test this suggestion and state your conclusion.