Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology?

organs

muscles

fluids

bones

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How many protons are in the radioactive isotope 40/19K?

You design a vessel to withstand the pressure of seawater at a depth of 350 m. 1. At this depth, what is the net force due to the water on the outside and the air inside the bell on a circular glass window 30.

If you fill up a balloon with a small amount of air, then set it in direct sunlight, you will see that the balloon expands. This expansion is due to an increase in volume, which results from A) a decrease in the pressure of the air in the balloon.

What is the dimensional formula of pressure?

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a boy hears the echo of his own voice from a distance hill after 0.8 seconds. If the speed of sound in air is 340m/s, calculate the distance of the hill from the boy.

Which of the following are found in plant cells buh not animal cells?

The diagram shows the field lines near the poles, X and Y, of two magnets Based on the field lines, what are the poles of the magnets? O X: north Y south X: south Y north X north Y north Х Y X south Y south

Why is it safe to watch an eclipse of the Moon but not an eclipse of the Sun