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Katarina [22]
3 years ago
6

It is recommended that children have no more than two sets of dental X-rays per year. Although X-rays have many benefits, they c

an be dangerous to human health because they are
Physics
2 answers:
guapka [62]3 years ago
4 0

Although X-rays have many benefits, they can be dangerous to human health because they are short wavelength, high frequency, with photons sufficiently energetic to damage DNA molecules.

mote1985 [20]3 years ago
4 0
Jydfdjdfyfdjyfdjyfxjyfxjyf x monocles
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Which of the following can break solid rock
sergeinik [125]

I would think the answer would be c

7 0
3 years ago
Read 2 more answers
A clay pot at room temperature is placed in a kiln, and the pot\'s temperature doubles. how much more heat per second is the pot
xeze [42]

Answer:

16

Explanation:

If we treat the pot as a black body, then:

q = σ T⁴ A,

where q is the heat per second radiated,

σ is the Stefan-Boltzmann Constant,

T is the absolute temperature,

and A is the surface area.

If the absolute temperature doubles, then q increases by a factor of 2⁴ = 16.

7 0
3 years ago
An atom of uranium 238 emits an alpha particle (an atom of He) and recoils with a velocity of 1.895 * 10^ 5 m/sec . With velocit
lora16 [44]

<u>Answer:</u> The velocity of released alpha particle is 1.127\times 10^7m/s

<u>Explanation:</u>

According to law of conservation of momentum, momentum can neither be created nor be destroyed until and unless, an external force is applied.

For a system:

m_1v_1=m_2v_2

where,

m_1\text{ and }v_1 = Initial mass and velocity

m_2\text{ and }v_2 = Final mass and velocity

We are given:

m_1=238u\\v_1=1.895\times 10^{5}m/s\\m_2=4u\text{ (Mass of }\alpha \text{ -particle)}\\v_2=?m/s

Putting values in above equation, we get:

238\times 1.895\times 10^5=4\times v_2\\\\v_2=\frac{238\times 1.895\times 10^5}{4}=1.127\times 10^7m/s

Hence, the velocity of released alpha particle is 1.127\times 10^7m/s

4 0
3 years ago
What do deltas and natural levees have in common?
Tpy6a [65]
They are both formed by deposited river sediment.
7 0
3 years ago
A 2000 kg truck is traveling at 25 m/s. Determine the impulse needed
Vitek1552 [10]

Answer:

A 7kg impulse

Explanation:

i think sorry if not

3 0
3 years ago
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