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3 years ago

When ___ attacks the surface of a metal, it becomes tarnished.

Physics

2 answers:

alexandr1967 [171]3 years ago

6 0

Answer:corrosion (i believe)

Explanation:

Tcecarenko [31]3 years ago

5 0

Answer

Mix baking soda and salt with hot water and cover everything with it. The proportions are not crucial, but about 1 tablespoon of salt and 1 tablespoon of baking soda to 3 dl water should do the trick. Lightly tarnished objects should clean up in a few minutes, and you just rinse them of and dry them.

Explanation:

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expeople1 [14]

Answer:

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8 0

3 years ago

A ball is thrown toward the ground. The figure shows the direction of the ball before it reaches the ground and the direction of

Kruka [31]

According to the principle of conservation of momentum, the momentum of the bouncing ball changes.

Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

<h3>How is momentum conserved in the bounce of balls?</h3>

The principle of conservation of momentum states that for any collision occurring in an isolated system, momentum is conserved.

a. For a body such as a ball dropped from a height, the total momentum is conserved.

However, there is a change in momentum of the ball as some of its momentum is transferred to the earth.

b. When the ball a ball of mass M is released from a height H1, it bounces to a height H2, which is about 1/2 of H1.

The value of H2 is less than that of H1 because some of the energy is converted to heat energy due to friction and air resistance, thereby its energy is less than its original value.

Therefore, the momentum of the bouncing ball is changes. Also, the ball bounces less than its original height because some energy is lost due to heat, friction and air resistance.

Learn more about momentum at: brainly.com/question/7538238

7 0

2 years ago

How is refraction different from reflection

IrinaVladis [17]

I just googled refraction vs reflection. Hope this helps! :)

7 0

4 years ago

The oxygen molecule, O2, has a total mass of 5.30×10-26 kg and a rotational inertia of 1.94×10-46 kg-m2 about an axis perpendicu

Nady [450]

Answer:

$\omega=2.85*10^{13}\frac{rad}{s}$

Explanation:

The translational kinetic energy depends on the mass and speed of the body, as follows:

$K_T=\frac{mv^2}{2}\\K_T=\frac{5.30*10^{-26}kg(1.49*10^3\frac{m}{s})^2}{2}\\\\K_T=1.18*10^{-19}J$

While rotational kinetic energy depends on the moment of inertia and the angular velocity of the body, as follows:

$K_R=\frac{I\omega^2}{2}(1)$ . We know that:

$K_R=\frac{2}{3}K_T(2)$

Replacing (1) in (2):

$\frac{I\omega^2}{2}=\frac{2}{3}K_T\\\\\omega=\sqrt{\frac{4}{3}\frac{K_T}{I}}\\\omega=\sqrt{\frac{4}{3}\frac{1.18*10^{-19}J}{1.94*10^{-46}kg\cdot m^2}}\\\omega=2.85*10^{13}\frac{rad}{s}$

4 0

4 years ago

Pakistan and bangladesh are two countries on the subcontinent

gregori [183]

Answer:

Indian subcontinent

Explanation:

The Indian subcontinent is a southern region and peninsula of Asia which include seven countries. The seven countries in Indian subcontinent are Pakistan, Bangladesh, India, Bhutan, Maldives, Sri Lanka and Nepal. According to Wikipedia, about 55 million years ago, the Indian subcontinent has land mass that rifted from Gondwana and merged with the Eurasian plate.

5 0

3 years ago

When ___ attacks the surface of a metal, it becomes tarnished.​

When ___ attacks the surface of a metal, it becomes tarnished.