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nlexa [21]
4 years ago
13

Why are radio waves considered harmless while ultraviolet waves and x-rats considered harmful

Physics
1 answer:
Anvisha [2.4K]4 years ago
7 0
 They are usually thought as harmful.
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An egg of mass 0.060 kg is dropped from the top of a building. Just before it reaches the ground, it has a total kinetic energy
3241004551 [841]

The velocity is 14 m/s

The parameters given on the question are

mass= 0.060 kg

kinetic energy= 5.9 joules

K.E= 1/2mv²

5.9= 1/2 × 0.060 × v²

5.9= 0.5 × 0.060v²

5.9= 003v²

v²= 5.9/0.03

v²= 196.66

v= √196.66

v= 14 m/s

Hence the velocity of the egg before it strikes the ground is 14 m/s

brainly.com/question/2084569?referrer=searchResults

3 0
3 years ago
How do you get a tachyionic particle and how are they faster than light
melomori [17]
<span>Tachyons are studied in an area called particle physics, and I must say this is a bit out of my league, but I'll give you some general thoughts. Tachyons are hypothetical particles resulting from what physicists call a thought experiment. Back in the 1960s, some physicists wondered what would happen if matter could travel faster than the speed of light, something that is supposed to be impossible according to the Theory of Relativity. So these particles may or may not exist because they have not been proven or disproven by real experiment as of yet. What people have done is apply existing formulas to the unique properties of tachyons (like imaginary mass!). What comes out is a particles that go faster when they lose energy with a MINIMUM velocity of the speed of light and a maximum velocity of infinity! Hope that helps Ben, theoretical physics is a weird place and is not too far off from philosophy.</span>
4 0
3 years ago
Which of the following depend upon the amount of matter in an object?
Finger [1]

The answer is c. The amount of matter in an object is the concentration of the atoms inside. This can also be called density. Weight depends on density because weight = \frac{mass}{volume}.

8 0
3 years ago
Imagine an elevator crowded with too many passengers for such a small space. This situation would be a good analogy for a substa
Flauer [41]
This situation is a good analogy for a substance with a very high density.
The density of any substance is the mass per unit volume. In this case, the mass confined in the given volume is very high, which is the case for a substance with a high density. The particles in the material are also closely packed.
8 0
3 years ago
In a periodic table a set of properties repeats from?
bogdanovich [222]

Answer;

Row to row

In a periodic table a set of properties repeats from row to row

Explanation;

In a periodic table, a set of properties repeats from row to row. This is called the periodic law. In the periodic table, the rows are called periods and the columns are called groups.

The modern periodic table is organized by increasing atomic number. The atomic mass unit is based on 1/12th the mass of a carbon-12 atom.  

The atomic mass of an element is the weighted average of the masses of an element’s isotopes.

8 0
3 years ago
Read 2 more answers
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