3 years ago

Combustion reactions are also ________ reactions. A. nuclear B. exothermic C. endothermic D. spontaneous

Physics

2 answers:

Roman55 [17]3 years ago

7 0

The answer is a hopefully I helped

sveta [45]3 years ago

5 0

I think is a) i hope this hlp

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kicyunya [14]

The angular momentum of an object is equal to the product of its moment of inertia and angular velocity.
L = Iω
I = 1/2 MR²
I = 1/2 x 13 x (0.2)
I = 1.3

ω = 2π/t
ω = 2π/0.3
ω = 20.9

L = 1.3 x 20.9
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3 years ago

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3 years ago

When electrons in an atom in an excited state fall to lower energy levels, energy is?

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3 years ago

Find the minimum kinetic energy in MeV necessary for an α particle to touch a 39 19 K nucleus that is initially at rest, assumin

SIZIF [17.4K]

Answer:

KE = 9.6MeV

Explanation:

Given the relationships we understand that,

$q_1 = 19e, q_2 = 2e$

The Potential at point p, is given by the following formula

$V_ {p} = \frac {Kq_1} {r}$

According to the graphic designed, you have,

$V_ {p} = \frac {Kq_1} {(r_1 + r_2)}$

$V_ {p} = \frac {(9 * 10 ^ 9) (19 * 1.6 * 10 ^ {- 15})} {(3.7 + 2) * 10 ^{- 15}}}$

$V_ {p} = 4.8 * 10 ^ 6V$

The kinetic energy of the particle would be given by

$KE = q_2 * V_ {p} = 2e * 4.8 * 10 ^ 6V$

$KE = 9.6MeV$

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3 years ago