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vesna_86 [32]
3 years ago
11

Explain why a ball thrown in space could keep moving forever, while a ball thrown here on Earth will come to a stop.

Physics
1 answer:
Dmitriy789 [7]3 years ago
4 0

Answer:

In space there is no air resistance. on earth there is

in space there is no opposite forces acting on stopping the ball, so if you throw it it will go on forever.

on earth there is air resistance and gravity, this will pull the ball towards the ground and slow it down.

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A generator converts mechanical energy into electrical energy, while a motor does the opposite - it converts electrical energy into mechanical energy
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The Northern Hemisphere is warmer in spring than in winter, because in spring
Amanda [17]

Both hemispheres are warmer in their Spring than they are
in their Winter, because . . .

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and

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4 0
4 years ago
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An inductor is connected to a 26.5 Hz power supply that produces a 41.2 V rms voltage. What minimum inductance is needed to keep
alexira [117]

Answer:

The minimum inductance needed is 2.78 H

Explanation:

Given;

frequency of the AC, f = 26.5 Hz

the root mean square voltage in the circuit, V_{rms} = 41.2 V

the maximum current in the circuit, I₀ = 126 mA

The root mean square current is given by;

I_{rms} = \frac{I_o}{\sqrt{2} } \\\\I_{rms}  = \frac{126*10^{-3}}{\sqrt{2} }\\\\I_{rms}  =0.0891 \ A

The inductive reactance is given by;

X_l = \frac{V_{rms}}{I_{rms}} \\\\X_l= \frac{41.2}{0.0891}\\\\X_l = 462.4 \ ohms

The minimum inductance needed is given by;

X_l = \omega L\\\\X_l = 2\pi  fL\\\\L = \frac{X_l}{2\pi f}\\\\L = \frac{462.4}{2\pi *26.5}\\\\L = 2.78 \ H

Therefore, the minimum inductance needed is 2.78 H

7 0
3 years ago
Are all neon lights made up of neon gases
Sholpan [36]
The answer is true! yes

goodluck my friend :-)
7 0
3 years ago
The x coordinate of an electron is measured with an uncertainty of 0.200 mm . What is vx, the x component of the electron's velo
Vikentia [17]

Answer:

Velocity of electron along x direction is 57.9 m/s

Explanation:

The uncertainty in x coordinate of electron, Δx = 0.200 mm = 0.2 x 10⁻³ m

Let vₓ be the x component of electrons velocity.

The uncertainty in x component of electrons momentum is:

Δpₓ = mΔvₓ

Here m is mass of the electron.

The uncertainty in velocity x component is 1% i.e. 0.01.

So, the above equation can be written as :

Δpₓ = 0.01mvₓ    ....(1)

The minimum uncertainty principle is:

\Delta x\Delta p_{x} = \frac{h}{2\pi }    ....(2)

Here h is Planck's constant.

From equation (1) and (2),

\Delta x\times0.01m v_{x} = \frac{h}{2\pi }

Substitute 0.2 x 10⁻³ m for Δx, 9.1 x 10⁻³¹ kg for m and 6.626 x 10⁻³⁴ m²kg/s in the above equation.

0.2\times10^{-3} \times0.01\times9.1\times10^{-31}\times v_{x} = \frac{6.626\times10^{-34} }{2\pi }

vₓ = 57.9 m/s

8 0
3 years ago
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