If a metallic wire is stretched regularly so that its length increased to the double,

Physics

1 answer:

Travka [436]3 years ago

5 0

Answer:

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Explanation:

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Mars has a mass of about 6.24 Ã 1023 kg, and its moon phobos has a mass of about 9.2 Ã 1015 kg. if the magnitude of the gravitat

Effectus [21]

Given: Mass of Mars Mm = 6.24 x 10²³ Kg;

Mass of Phobos Mp = 9.2 x 10¹⁵ Kg

Gravitational Force F = 4.47 X 10¹⁵ N

Gravitational constant G = 6.67 X 10⁻¹¹ N m²/Kg²

Radius r = ?

Formula: F = GMmMp/r² derive r

r = √GMmMp/F

r = √(6.67 x 10⁻¹¹ N m²/Kg²)(6.24 x 10²³ Kg)(9.2 x 10¹⁵ Kg)/4.47 x 10¹⁵ N

r = √(6.67 x 10⁻¹¹ N m²/Kg²)5.74 x 10³⁹ Kg²/4.47 x 10¹⁵ N

r = √8.57 x 10¹³ m

r = 9,257,429 m

or r = 9.26 x 10⁶ m

8 0

4 years ago

What is the charge of an atom with 21 protons and 6 electrons

Svetach [21]

Answer:

Scandium with an ion charge of +3

Explanation:

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3 years ago

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For the chemical reaction C2H6 --> C2H4 + H2 + 137kJ, the chemical energy of the A. reactant and the chemical energy of the p

Goryan [66]

Answer: The chemical energy of reactants is greater than the chemical energy of products.

Explanation: In the given reaction

$C_2H_6\rightarrow C_2H_4 + H_2 +137 kJ$

It can be seen that the energy has been released. Thus we can say that reactants have converted to products by release of energy. Thus energy of products is less as compared to energy of reactants as some of the energy has been released.

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Dolphins emit clicks of sound for communication and echolocation. A marine biologist is monitoring a dolphin swimming in seawate

LenKa [72]

Answer:

12.64968 Hz

Explanation:

v = Velocity of sound in seawater = 1522 m/s

u = Velocity of dolphin = 7.2 m/s

f' = Actual frequency = 2674 Hz

From Doppler effect we get the relation