fizik kirmizi Flashcards
(12 cards)
How do electrocytes behave in capillaries?
a) electrocytes accumulate in rouleaux-type aggregates
b) as individual red blood cells
с)the round shape of each electrocyte is deformed and becomes elongated
d) all the answers given are correct
с)the round shape of each electrocyte is deformed and becomes elongated
How do electrocytes behave in large blood vessels?
a) electrocytes accumulate in rouleaux-type aggregates
b) as individual red blood cells
с)the round shape of each electrocyte is deformed and becomes elongated
d) all the answers given are correct
a) electrocytes accumulate in rouleaux-type aggregates
How do electrocytes behave in small arteries, arterioles?
a) electrocytes accumulate in rouleaux-type aggregates
b) as individual red blood cells
с)the round shape of each electrocyte is deformed and becomes elongated
d) all the answers given are correct
b) as individual red blood cells
From which part of the x-ray tube are x-rays emitted?
a) from the cathode
b) from the anode
c) from the space between the anode and the cathode
d) radiation occurs around the X-ray tube
b) from the anode
What is X-ray radiation?
a) bremsstrahlung of electrons in the anode material
b) thermal radiation of the anode material
c) cathode radiation of electrons
d) electrons scattered by the anode
a) bremsstrahlung of electrons in the anode material
Find the quantity that corresponds to the following definition:
A measure of the radiation energy deposited in matter by ionizing radiation
per unit mass. It is a measurable quantity and a key component of radiation
protection as well as radiology.
DT=E/T [D] =1 Gy (Gray)
a) absorbed dose
b) equivalent dose
c) effective dose
d) all answers are correct.
a) absorbed dose
The measure of the radiation dose to tissue where an attempt has been
made to allow for the different relative biological effects of different types of
ionizing radiation. It is measured using the sievert but rem is still commonly
used (1 Sv = 100 rem). It is calculated by multiplying the absorbed dose to the
organ or tissue with the radiation weighting factor
HT=DT∙wR 1 Sv = 100 rem
a) absorbed dose
b) equivalent dose
c) effective dose
d) all answers are correct
b) equivalent dose
It is a calculation that sums up all of the different exposures into a single
measure that generally reflects the overall risk for the whole body.
The sum of the products of the dose equivalent to the organ or tissue (HT) and the
weighting factors (wT) applicable to each of the body organs or tissues that
are irradiated.
�
�𝐸=∑𝑤𝑇∙𝐻𝑇 𝑁 1 [HE] =1 Sv (sievert)
a) absorbed dose
b) equivalent dose
c) effective dose
d) all answers are correct
c) effective dose
What is the random error?
a) random errors are caused by faults in the instruments used or the methodology
used to collect the data.
b) random errors are caused by chance variations in the measurement process that
lead to deviations from the true value.
c) random error cannot be minimized even by reducing the influence of the
external environment and involving an experienced measurement specialist.
d) all answers are correct
b) random errors are caused by chance variations in the measurement process that
lead to deviations from the true value.
What is saturated humidity?
a) it is when the concentration of water vapor is so high that it becomes impossible
to breathe the air
b) it is when the concentration of water vapor in the air, regardless of temperature,
no longer increases
c) it is when the concentration of water vapor in the air at a given temperature no
longer increases
d) this is when the concentration of water vapor in the air does not change for
several days in a row
c) it is when the concentration of water vapor in the air at a given temperature no longer increases
How is absolute humidity determined?
a) Absolute air humidity is calculated by dividing the mass of water contained in
the air by the volume occupied by a given amount of air.
b) Absolute air humidity is calculated by dividing the actual absolute air humidity
by the maximum possible absolute humidity at a given temperature.
c) Absolute air humidity is calculated by dividing the mass of water contained in
the air by the concentration of water vapor released when water boils
d) Absolute air humidity is calculated by dividing the actual absolute air humidity
by the maximum possible absolute air humidity specified at the Earth’s equator at a
given temperature.
a) Absolute air humidity is calculated by dividing the mass of water contained in
the air by the volume occupied by a given amount of air.
Choose the correct words in place of the ellipsis? Some transparent
crystals have the property of double refraction: when light hits the crystal, the
beam is divided into two. For one of the beams, the laws of refraction are
valid, so such a beam is called …… for the other, the laws are not valid, and the
beam is called ……
a) natural, supernatural
b) polarized,
non-polarized
c) ordinary, extraordinary
c) ordinary, extraordinary
