Answer:
Alpha particle
Explanation:
Alpha particles emitted by radioactive nuclei consist of 2 protons and 2 neutrons bound together which makes it neutral and are able to pass through ordinary matter almost undisturbed
answer is C. dressing to protect hands
Answer:
Why can you see your own reflected image in a mirror but not on a dry, painted wall? More light is reflected off a mirror, and it's specular reflection - it's all being reflected in the same way. ... If the surface were rough, the light rays would reflect off in all different directions and get jumbled up in the process.
The effect after the current is tripled is changing the drift velocity by a factor 3.
We need to know about drift velocity of electrons to solve this problem. The drift velocity can be determined as
v = I / (n . A . q)
where v is drift velocity, I is current, n is atom number density, A is surface area and q is the charge.
From the question above, we know that
I2 = 3 . I1
According to drift velocity formula, the drift velocity is proportional to current
v ~ I
Hence, the ratio of drift velocity and current is
v1 / v2 = I1 / I2
substitute the final current (I2)
v1 / v2 = I1 / (3.I1)
v1 / v2 = 1 / 3
v2 = 3v1
For more on drift velocity at: brainly.com/question/25700682
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