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OLEGan [10]
3 years ago
5

Geologists map out ________ from previous earth quakes to determine earthquakes risk. a. graphs c. data b. buildings d. none of

the above
Took the test, it is C
Physics
1 answer:
photoshop1234 [79]3 years ago
8 0

Answer: Geologists map out <em>data </em>from previous earth quakes to determine earthquakes risk.

Explanation:

Geology is the study of earth. Also, it is the study of how Earth's materials, structures etc are changed over time.

Geologist is a scientist who studies the structure of earth, rocks, soil, fossils and earthquake. So, they map out the data from previous earthquakes to determine earthquake risk.

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f 720-nm and 620-nm light passes through two slits 0.68 mm apart, how far apart are the second-order fringes for these two wavel
valkas [14]

Answer:

0.0003 m = 0.3 mm

Explanation:

For constructive interference in the Young's experiment.

The position of the mth fringe from the central fringe is given by

y = L(mλ/d)

λ = wavelength = 720 nm = 720 × 10⁻⁹ m

L = distance between slits and screen respectively = 1.0 m

d = separation of slits = 0.68 mm = 0.68 × 10⁻³ m

m = 2

y = 1(2 × 720 × 10⁻⁹/(0.68 × 10⁻³) = 0.00212 m = 2.12 mm

For the 620 nm light,

y = 1(2 × 620 × 10⁻⁹/(0.68 × 10⁻³) = 0.00182 m = 1.82 mm

Distance apart = 2.12 - 1.82 = 0.3 mm = 0.0003 m

8 0
3 years ago
How fast does a cats hair grow back?
Lady_Fox [76]
It depends on the type of cat....
6 0
4 years ago
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When the net force acts at right angles to an object’s motion, what does it do to the object’s motion?
denpristay [2]

Answer:

B. It changes the objects direction

8 0
3 years ago
The emission of x rays can be described as an inverse photoelectric effect.
timama [110]

Answer:

The potential difference through which an electron accelerates to produce x rays is 1.24\times 10^4\ volts.                                                  

Explanation:

It is given that,

Wavelength of the x -rays, \lambda=0.1\ nm=0.1\times 10^{-9}\ m

The energy of the x- rays is given by :

E=\dfrac{hc}{\lambda}

The energy of an electron in terms of potential difference is given by :

E=eV

So,

\dfrac{hc}{\lambda}=eV

V is the potential difference

e is the charge on electron

V=\dfrac{hc}{e\lambda}

V=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{1.6\times 10^{-19}\times 0.1\times 10^{-9}}

V = 12431.25 volts

or

V=1.24\times 10^4\ volts

So, the potential difference through which an electron accelerates to produce x rays is 1.24\times 10^4\ volts. hence, this is the required solution.

4 0
3 years ago
What is the kinetic energy of an object that has a mass of 50.0 kg and a velocity of 18 m/s?
Sedbober [7]

k=1/2mv^2


k=1/2 x 50.0 x 18^2 = 8100 joules

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