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4 years ago

What kind of electric charge does an atom have answer.com?

Physics

2 answers:

Bond [772]4 years ago

5 0

It's negative electric charge

Tresset [83]4 years ago

5 0

Atoms of "ordinary" matter have a dense positively charged nucleus (containing protons and/or neutrons) with electrons moving around it while antimatter has a dense negatively charged nucleus (containing antiprotons and antineutrons) with positrons moving around it.

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The fastest propeller-driven aircraft is the Russian TU-95/142, which canreach a maximum speed of 925 km/h. For this speed, calc

valentinak56 [21]

Answer:

The resultant displacement of plane = 1310.76 Km

Explanation:

Given that,

Speed of the plane = 925 Km/h

Therefore, in 1 hour plane travels 925 Km

From figure,

Displacement if it travels east for 1.5 h, AB = 1387.5 Km

Displacement if it travels north-west for 2 h, BC = 1850 Km

Angle formed between two displacement = 135°

The resultant displacement is given by the relation

AC² = AB² + BC² + 2 AB BC Cos θ

Substituting the values in the equations,

AC² = 1387.5² + 1850² + 2 x 1387.5 x 1850 x Cos 135°

= 1718095

AC = 1310.76

Therefore, the resultant displacement of plane is 1310.76 Km

7 0

3 years ago

Which is a concern about mining for uranium? Heated water could be released into the environment. Dust released in the air could

saw5 [17]

Answer: Dust released in the air could be radioactive.

Explanation:

Uranium is a radioactive element. It decays naturally to attain stability. While mining, the dust displaces into the air causing not only harm to environment but for the workers as well. The released in the air could be radioactive which would be inhaled posing threat for lung cancer.

Thus, the correct answer is dust released in the air could be radioactive is a concern about mining Uranium.

3 0

3 years ago

Read 2 more answers

A 6.30 kg piece of solid copper metal at an initial temperature T is placed with 2.00 kg of ice that is initially at -16.0 ∘C. T

Viktor [21]

Answer:

179 degree

Explanation:

Solid copper will lose heat to warm up and melt ice . Since all the ice has not melted so final temperature of mixture will be zero.

heat gained by ice to reach temperature of zero degree

= mass of ice x specific heat of ice x rise of temp

= 2 x 2093 x 16 = 66976 J

Heat gained to melt 1.1. kg of ice

mass x latent heat of ice

1.1 x 334000

= 367400

total heat

= 367400 + 66976

=434376

Heat lost by copper

= 6.3 x 385 x T

where 385 is specific heat of copper and T is initial temperature

heat lost = heat gained

6.3 x 385 T = 434376

T = 434376 / (6.3 x 385)

= 179 degree .

3 0

3 years ago

Please HELP me label these symbols!!!!

Xelga [282]

Answer:

A is a battery

B is a light

C is a resistor

D is a closed switch

thank you for this question, I love circuit diagrams

Explanation:

4 0

3 years ago

Match the words givne below to the appropriate blanks in the sentences on the right. Make certain each sentence is complete befo

Pepsi [2]

Answer: forward

The child will continue to move forward at the before the crash speed. This is because the child at the instant of head on collision of the car will tend to continue the state of uniform motion the car exhibited as newton's first law states. Newtons first law: A body will continue to be at rest or in uniform motion with constant velocity/speed unless acted upon by an external force.

Explanation:

The child will continue moving forward until he/she encounters some obstruction or resistance which could be dangerous. In a safety design car, the child should collide with the SRS airbag right in front which gets activated for situations where the acceleration of the car is above 250m/s².

Thank you for reading and I hope this was helpful.

6 0

4 years ago