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andreyandreev [35.5K]
3 years ago
11

Which elements are not noble gases?

Physics
2 answers:
boyakko [2]3 years ago
7 0

Lítio é metal  

Hélio é gás nobre

Neônio é gás nobre  

Cálcio não é gás nobre  

Os gases nobres são os elementos da família 18 da Tabela Periódica, que são: hélio, neônio, argônio, criptônio, xenônio e radônio.  

Ivan3 years ago
3 0
Helium lithium and calcium
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The torque exerted by a crowbar on an object increases with increased _______.
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Answer:

force and leverage distance

Explanation:

the formula for torque if = force x distance

(the distance above is the leverage distance on the crow bar)

therefore if there is an increase in either the torque or the leverage distance, or both, the torque exerted by the crow bar also increases.

for example

  • lets assume a force of 5 n is applied on the crow bar with a leverage distance of 2 m.

        the torque = 5 x 2 = 10 N.m

  • but if the force was increased to 7 N

        torque = 7 x 2 = 12 N.m

from the illustration above, we can see that the torque increased with an increase in force. There would also be an increase in torque if the distance were to be increased.

3 0
3 years ago
What disagrees with laplace hypothesis of the suns formation
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Answer:

The sun's mass moved toward the outer edge of it

Explanation:

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3 years ago
Say that you are in a large room at temperature TC = 300 K. Someone gives you a pot of hot soup at a temperature of TH = 340 K.
lora16 [44]

Answer:

Explanation:

Heat energy given out by the soup

= C_v  x ( t₂ - t₁ )

= 33 x ( 340 - 300)

= 1320 J

This heat is given to Carnot engine . Efficiency of engine

= (340 - 300 ) / 340

= 40 / 340

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This fraction of total heat given is converted into useable work by the engine.

5 0
4 years ago
A ball on a string makes 25.0 revolutions in 9.37 s, in a circle radius 0.450 m. What is it’s velocity?
Sauron [17]

The velocity of the ball is 12.5 m/s

Explanation:

The velocity of the ball is given by the ratio between the distance covered by the ball and the time taken:

v=\frac{d}{t}

First, we calculate the distance covered. We know that the radius of the circle is

r = 0.450 m

And the length of the circumference is

L=2\pi r = 2\pi(0.750)=4.7 m

The ball makes 25.0 revolutions, so a total distance of

d=(25.0)L=(25.0)(4.7)=117.5 m

In a time of

t = 9.37 s

So, its velocity is

v=\frac{117.5}{9.37}=12.5 m/s

Learn more about velocity here:

brainly.com/question/5248528

#LearnwithBrainly

3 0
3 years ago
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Workshop:The analysis of a simple pendulum assumed that the mass was a particle, with no size. A realistic pendulum is a small,
bagirrra123 [75]

Answer:

The expression for the period of the pendulum is

T=2π√l/g

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Kindly find attached document for the analysis of the pendulum and the derivation for the period

What is a simple harmonic motion?

Simple harmonic motion is defined as the to and fro motion of an object or a particle whose acceleration is directly proportional to its displacement from a fixed point and is always directed towards that point.

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