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cluponka [151]
3 years ago
15

True or False. Can Metalloids conduct electricity under certain conditions?

Physics
1 answer:
EleoNora [17]3 years ago
4 0

Answer:

Conduction: Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semi-conductors. Luster: Silicon for example appears lustrous, but is not malleable or ductile (it is brittle - a characteristic of some nonmetals).

Explanation:

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A particle (charge = 40 μC) moves directly toward a second particle (charge = 80 μC) which is held in a fixed position. At an in
lisov135 [29]

Answer:

The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m

Explanation:

Given that,

First charge = 40 μC

Second charge = 80 μC

Distance between the two particles = 2.0 m

Kinetic energy = 16 J

We need to calculate the distance separating the two particles when the moving particle is momentarily stopped

Using conservation of energy

K.E+\dfrac{kq_{1}q_{2}}{d}=\dfrac{kq_{1}q_{2}}{x}+K.E

Put the value into the formula

16+\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{2}=\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{x}+0

16+14.4=\dfrac{28.8}{x}

30.4x=28.8

x=\dfrac{28.8}{30.4}

x=0.947\ m

Hence, The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m

8 0
3 years ago
A ball with an initial velocity of 2 m/s rolls for a period of 3 seconds. If the ball is uniformly accelerating at a rate of 3 m
ikadub [295]

Answer: 11 m/s

vinitial=2 m/s

time=3 s

acceleration = 3 m/s^2

vfinal = ?

The key here is that it is a constant acceleration, so we can use the constant acceleration equations. The easiest one to use would be:

vfinal=vinitial + a*t

We need vfinal, so algebraically we are ready to put in numbers into the equation:

vfinal=vinitial + a*t = 2 m/s + (3 m/s^2)*(3 s ) = 11 m/s is the final velocity

7 0
3 years ago
In any ecosystem, the organisms ___________ for resources, such as food, water, and space. compete fight kill
Rashid [163]

Compete

Explanation:

In any ecosystem, it is a known fact that the organisms compete for resources such as food, water, and space.

An ecosystem is made up of different communities of organisms interacting with one another and their environment.

  • Resources in any environment are limited and are not able to satisfy the needs of the organisms.
  • This leads organisms to compete for them.
  • they begin to develop different behaviors that can enhance their chances of accruing more resources to themselves.

learn more:

Ecosystem brainly.com/question/7846024

#learnwithBrainly

3 0
3 years ago
Read 2 more answers
Andy Petite pitches a 0.8 kg baseball with a velocity of 67 m/s. Josh Hamilton
kodGreya [7K]

The Impulse delivered to the baseball is 89 kgm/s.

To solve the problem above, we use the formula of impulse.

⇒ Formula:

  • I = m(v-u)................. Equation 1

Where:

  • I = Impulse delivered to the baseball
  • m = mass of the baseball
  • v = Final velocity of the baseball
  • u = initial speed of the baseball

From the question,

⇒ Given:

  • m = 0.8 kg
  • u = 67 m/s
  • v = -44 m/s

⇒ Substitute these values into equation 1

  • I = 0.8(-44-67)
  • I = 0.8(-111)
  • I = -88.8
  • I ≈ -89 kgm/s

Note: The negative tells that the impulse is in the same direction as the final velocity and therefore can be ignored.

Hence, The Impulse delivered to the baseball is 89 kgm/s.

Learn more about impulse here: brainly.com/question/7973509

7 0
2 years ago
Neither _____ nor _____ can be created or destroyed, but they can be changed from one to the other
Viktor [21]

Matter nor energy

hope this helps

3 0
4 years ago
Read 2 more answers
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