4 years ago

A concise definition of pair production

1 answer:

6 0

Pair production<span> is a direct conversion of radiant energy to matter. It is one of the principal ways in which high-energy gamma rays are absorbed in matter. </span>

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2. Which of the following cell structures is the site of photosynthesis?

WITCHER [35]

Answer:

Option C. The chloroplasts contain chlorophyll pigments requires for photosynthesis.

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3 years ago

A rocket traveling at 80 m/s is accelerated uniformly to 152 m/s over a 18 s interval. What is its displacement during this time

IgorLugansk [536]

Recall that with constant acceleration,

$x_f-x_i=\dfrac{v_i+v_f}2t$

where $x_f-x_i$ is the rocket's displacment, $v_i$ is its initial velocity, $v_f$ its final velocity, and $t$ is time. So

$x_f-x_i=\dfrac{80\frac{\mathrm m}{\mathrm s}+152\,\frac{\mathrm m}{\mathrm s}}2(18\,\mathrm s)=2088\,\mathrm m$

or just 2100 m if taking significant digits into account.

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3 years ago

A ray in air hits the surface of water at 41.0 deg. At what angle does it travel in the water?

otez555 [7]

Answer:

r = 29.53 degrees

Explanation:

Given that,

Angle of incidence, $i=41^{\circ}$

We need to find the angle at which it will travel in the water. The refractive index of water is 1.33 and refractive index of air is 1. Using Snell's law as :

$n_1\sin i=n_2\sin r$