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Kitty [74]
3 years ago
12

o illustrate the work-energy concept, consider the case of a stone falling from xi to xf under the influence of gravity. Using t

he work-energy concept, we say that work is done by the gravitational _____, resulting in an increase of the ______ energy of the stone.
Physics
1 answer:
Phantasy [73]3 years ago
5 0

Answer: force of gravity on the body due to height difference above the earth's surface

Explanation: as you increase the height of a body above ground, you do work against gravity in moving it from a point on the earth's surface to that point. So a body falling has a stored up gravito-potential energy which acts on it downward due to its mass, accelerating it downwards

Answer b): kinetic energy of the body

Explanation: the downward force produces an acceleration of magnitude 9.81m/s2 downwards which means an increasing velocity. This increasing velocity means the kinetic energy of the body is increasing (kinetic energy is proportional to velocity of the body squared)

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A particular X-ray photon has initial energy of 60 keV when it enters the body. This photon transmits through 30 cm of soft tiss
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Answer:

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Explanation:

given,

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μ(for soft tissue) = 0.7 cm⁻¹ (taken from table)

E = E_0e^{-0.7\times 20}

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