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Elena-2011 [213]
3 years ago
15

Electromagnetic Waves Mechanical Waves

Physics
1 answer:
fredd [130]3 years ago
6 0

Answer:A

Explanation:

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Electrons and protons are basic particles (and together make atoms) that have charge. What is the electric charge of an electron
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hi, here's the answer

Explanation:

the electric charge of an electron is negative (-ve).

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The speed of sound through diamond is about 12,000 m/s. The speed of sound through wood is about 3,300 m/s. Which statement expl
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Two vectors are shown. Which statement best compares the vectors?
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B

Explanation:

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4 years ago
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A typical neutron star may have a mass equal to that of the Sun but a radius of only 20 km.(a) What is the gravitational acceler
Pepsi [2]

Answer:

331665750000\ m/s^2

3257806.62409 m/s

Explanation:

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

M = Mass of Sun = 1.989\times 10^{30}\ kg

r = Radius of Star = 20 km

u = Initial velocity = 0

v = Final velocity

s = Displacement = 16 m

a = Acceleration

Gravitational acceleration is given by

g=\dfrac{GM}{r^2}\\\Rightarrow g=\dfrac{6.67\times 10^{-11}\times 1.989\times 10^{30}}{20000^2}\\\Rightarrow g=331665750000\ m/s^2

The gravitational acceleration at the surface of such a star is 331665750000\ m/s^2

v^2-u^2=2as\\\Rightarrow v=\sqrt{2as+u^2}\\\Rightarrow v=\sqrt{2\times 331665750000\times 16+0^2}\\\Rightarrow v=3257806.62409\ m/s

The velocity of the object would be 3257806.62409 m/s

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3 years ago
which statement is true about the atomic mass? a. it is never greater than the atomic number b. it always equal the atomic numbe
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D. it can be greater than the atomic number
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