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3 years ago

Which type of scanner uses X-rays, and why?

Physics

2 answers:

denis-greek [22]3 years ago

7 0

Answer:

The answer is C.Security baggage scanners, because X-rays either pass through or are absorbed by the objects in the baggage, creating an image of the objects

Explanation:

I took AP EX quiz.

Mashutka [201]3 years ago

3 0

Answer:

C. Security baggage scanners, because X-rays either pass through or are absorbed by the objects in the baggage, creating an image of the objects

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Before you meet with a sexual assault victim, you run through the advocacy steps in your mind. What is the second step of advoca

iVinArrow [24]

Before you meet with a sexual assault victim, you run through the advocacy steps in your mind. The second step in advocacy process is to know your audience. It is multi-layered, from policy makers to media to key constituencies to public. Your research should consider whether it is provincial or health authorities or public.

3 0

4 years ago

One method for determining the amount of corn in early Native American diets is the stable isotope ratio analysis (SIRA) techniq

Iteru [2.4K]

Answer:

$0.0084575\ \text{T}$

$0.272\ \text{m}$

2.2 cm easily observable

Explanation:

$m_1$ = Mass of 12 C = $1.99\times 10^{-26}\ \text{kg}$

$m_2$ = Mass of 13 C = $2.16\times 10^{-26}\ \text{kg}$

$r_1$ = Radius of 12 C = $\dfrac{25}{2}=12.5\ \text{cm}$

B = Magnetic field

v = Velocity of atom = 8.5 km/s

$r_2$ = Radius of 13 C

The force balance of the system is

$qvB=\dfrac{m_1v^2}{r}\\\Rightarrow B=\dfrac{m_1v}{rq}\\\Rightarrow B=\dfrac{1.99\times 10^{-26}\times 8500}{12.5\times 10^{-2}\times 1.6\times 10^{-19}}\\\Rightarrow B=0.0084575\ \text{T}$

The required magnetic field is $0.0084575\ \text{T}$

Radius is given by

$r=\dfrac{mv}{qB}$

$r\propto m$

$\dfrac{r_2}{r_1}=\dfrac{m_2}{m_1}\\\Rightarrow r_2=\dfrac{m_2}{m_1}r_1\\\Rightarrow r_2=\dfrac{2.16\times 10^{-26}}{1.99\times 10^{-26}}\times 12.5\times 10^{-2}\\\Rightarrow r_2=0.136\ \text{m}$

The required diameter is $2\times 0.136=0.272\ \text{m}$

Separation is given by

$2(r_2-r_1)=2(0.136-0.125)=0.022\ \text{m}$

The distance of separation is 2.2 cm which is easily observable.

5 0

3 years ago

A certain moving electron has a kinetic energy of 0.991 × 10−19 J. Calculate the speed necessary for the electron to have this e

alisha [4.7K]

Answer: The speed necessary for the electron to have this energy is 466462 m/s

Explanation:

Kinetic energy is the energy posessed by an object by virtue of its motion.

$K.E=\frac{1mv^2}{2}$

K.E= kinetic energy = $0.991\times 10^{-19}J$

m= mass of an electron = $9.109\times 10^{-31}kg$

v= velocity of object = ?

Putting in the values in the equation:

$0.991\times 10^{-19}J=\frac{1\times 9.109\times 10^{-31}kg\times v^2}{2}$

$v=466462m/s$

The speed necessary for the electron to have this energy is 466462 m/s

4 0

3 years ago

Read 2 more answers

A current exists whenever electric charges move. If ΔQ is the net charge that passes through a surface during a time period Δt,

jeka57 [31]

Answer:

It represents the change in charge Q from time t = a to t = b

Explanation:

As given in the question the current is defined as the derivative of charge.

I(t) = dQ(t)/dt ..... (i)

But if we take the inegral of the equation (i) for the time interval from t=a to

t =b we get

Q =∫_a^b▒〖I(t) 〗 dt

which shows the change in charge Q from time t = a to t = b. Form here we can say that, change in charge is defiend as the integral of current for specific interval of time.

5 0

4 years ago

Which of the following describes a referee's job?

Serhud [2]

Answer:

C. Supervising the game to make sure teams are playing fairly

5 0

4 years ago