3 years ago

Why hydrogen atom does not emit X-rays??

Physics

1 answer:

goblinko [34]3 years ago

8 0

b) it has narrow energy levels is your answer.

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An object initially at rest experiences an acceleration of 9.8 m/s2. How much time will it take to achieve a velocity of 58 m/s?

frez [133]

5.91(approx) seconds just divide velocity by acceleration

4 0

3 years ago

As a person squeezes and applies pressure to the outside of a balloon air particles inside

MAVERICK [17]

They will occupy less volume which will cause an increased density of the particles.

3 0

3 years ago

In odd nuclei, what determines the final spin of the nucleus?

Katen [24]

Answer:

In odd nuclei, the left out proton or neutron will contribute to the spin of the nucleus.

Explanation:

The meaning of odd nuclei is atomic mass is odd.

A=odd number.

A=Z+n

Here, Z is proton either it will odd or n will odd which is neutron.

Now according to the shell model the left out proton or neutron will contribute to the spin and parity.

For example,

Take the case of isotope of nitrogen-15.

Here Z is 7, and n is 8 will not contribute in spin.

Now, for Z=7.

$1S^{2} _{\frac{1}{2} }, 1P^{4} _{\frac{3}{2} }, 1P^{1} _{\frac{1}{2} }$

Here,

$j=\frac{1}{2}$

and, L=1.

Fort parity,

$(-1)^{L}$

Put the value of L.

Parity will be -1.

Now, spin will be

$S=(\frac{1}{2} )^{-1}$ .

7 0

3 years ago

Which change of state do particles in a material become farther apart?

crimeas [40]

Particles become farther apart from each other in the change of state between liquid and gas.
Hope that helped =)

6 0

2 years ago

Ann puts a beaker on the scale which shows the mass to be 1.65kg. The actual mass was 1.72 kg. what was the percent error in Ann

mojhsa [17]

Measured reading is 1.65 kg

actual reading was 1.72 kg

error in the reading is 1.72 - 1.65 = 0.07 kg

Now percentage error is given as

$error = \frac{error}{true reading}*100$

$error = \frac{0.07}{1.72}*100$

$error = 4.1$

<em>so this is -4.1% error as the measured reading is less than the actual value</em>

8 0

3 years ago