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Alex787 [66]
3 years ago
5

Electronegativity is____ at the top of the periodic table.​

Physics
2 answers:
Alenkinab [10]3 years ago
5 0

Answer:

highest is correct word

Explanation:

DanielleElmas [232]3 years ago
3 0

Answer:

Electronegativity is a chemical property at the top of the periodic table

Explanation:

electronegativity is a chemical property that measures the ability of an atom to attract a bonding pair of electrons when it is part of a compound

it's a property of atom that increases as you go to the right and up.

One example is the Pauling scale. it is a numerical scale of electronegativities. It was first developed by Linus Pauling.

it is commonly used to calculate the ability of electronegativity to attract electrons to itself.

The most common electronegative element is Flourine, having an assigned value of 4.0, ranging down to caesium and francium, having the least electronegative at 0.7

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The angular momentum of a flywheel having a rotational inertia of 0.142 kg·m2 about its central axis decreases from 7.20 to 0.14
luda_lava [24]

Answer:

3.3619 Nm

54.27472 rad

182.46618 J

86.88 W

Explanation:

L_i = Initial angular momentum = 7.2 kgm²/s

L_f = Final angular momentum = 0.14 kgm²/s

I = Moment of inertia = 0.142 kgm²

t = Time taken

Average torque is given by

\tau_{av}=\frac{L_f-L_i}{\Delta t}\\\Rightarrow \tau_{av}=\frac{0.14-7.2}{2.1}\\\Rightarrow \tau_{av}=-3.3619\ Nm

Magnitude of the average torque acting on the flywheel is 3.3619 Nm

Angular speed is given by

\omega_i=\frac{L_i}{I}

Angular acceleration is given by

\alpha=\frac{\tau}{I}

From the equation of rotational motion

\theta=\omega_it+\frac{1}{2}\alpha t^2\\\Rightarrow \theta=\frac{L_i}{I}\times t+\frac{1}{2}\times \frac{\tau}{I}\times t^2\\\Rightarrow \theta=\frac{7.2}{0.142}\times 2.1+\frac{1}{2}\times \frac{-3.3619}{0.142}\times 2.1^2\\\Rightarrow \theta=54.27472\ rad

The angle the flywheel turns is 54.27472 rad

Work done is given by

W=\tau\theta\\\Rightarrow W=-3.3619\times 54.27472\\\Rightarrow W=-182.46618\ J

Work done on the wheel is 182.46618 J

Power is given by

P=\frac{W}{t}\\\Rightarrow P=\frac{-182.46618}{2.1}\\\Rightarrow P=-86.88\ W

The magnitude of the average power done on the flywheel is 86.88 W

6 0
3 years ago
(This is a non-relativistic warm-up problem, to get you to think about reference frames.) A girl throws a baseball upwards at ti
____ [38]

Answer:

X(t) = 9.8 *t - 4.9 * t^2

Explanation:

We set a frame of reference with origin at the hand of the girl the moment she releases the ball. We assume her hand will be in the same position when she catches it again. The positive X axis point upwards.The ball will be subject to a constant gravitational acceleration of -9.81 m/s^2.

We use the equation for position under constant acceleration:

X(t) = X0 + V0 * t + 1/2 * a *t^2

X0 = 0 because it is at the origin of the coordinate system.

We know that at t = 2, the position will be zero.

X(2) = 0 = V0 * 2 + 1/2 * -9.81 * 2^2

0 = 2 * V0 - 4.9 * 4

2 * V0 = 19.6

V0 = 9.8 m/s

Then the position of the ball as a function of time is:

X(t) = 9.8 *t - 4.9 * t^2

5 0
3 years ago
The impulse of a constant force is equal to
Nookie1986 [14]

Answer:

Explanation:

It's equal to change of momentum in contact

6 0
3 years ago
The element radon is at the opposite end of the range, with the lowest specific heat of all naturally occurring elements. Radon'
allochka39001 [22]

Explanation:

Q = mc∆T

= (0.34 kg)(94 J/kg-°C)(25°C)

= 799 J

5 0
3 years ago
Whats the answer to 10a² - 6ab + 10 -2a² - 4ab +15b?​
Angelina_Jolie [31]
8a2-10ab+15b+10 Explaintion:

8 0
3 years ago
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