3 years ago

The acceleration of an object is constant when its velocity is :

Physics

2 answers:

bixtya [17]3 years ago

6 0

A) Constant.
That’s my answer!

emmasim [6.3K]3 years ago

5 0

Answer:

B. changing by a constant amount each second

Explanation:

thats my answer

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Two pulses are moving along a string. One pulse is

raketka [301]

Answer:

The answer is the 3rd option!

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2 years ago

A current I flows down a wire of radius a.

Helga [31]

Answer:

(a) $K = \frac{I}{2\pi a}$

(b) $J = \frac{I}{2\pi as}$

Explanation:

(a) The surface current density of a conductor is the current flowing per unit length of the conductor.

$K = \frac{dI}{dL}$

Considering a wire, the current is uniformly distributed over the circumferenece of the wire.

$dL = 2\pi r$

The radius of the wire = a

$dL = 2\pi a$

The surface current density $K = \frac{I}{2\pi a}$

(b) The current density is inversely proportional

$J \alpha s^{-1}$

$J = \frac{k}{s}$ ......(1)

k is the constant of proportionality

$I = \int\limits {J} \, dS$

$I = J \int\limits \, dS$ ........(2)

substituting (1) into (2)

$I = \frac{k}{s} \int\limits\, dS$

$I = k \int\limits^a_0 \frac{1}{s} {s} \, dS$

$I = 2\pi k\int\limits\, dS$

$I = 2\pi ka$

$k = \frac{I}{2\pi a}$

substitute $J = \frac{k}{s}$

$J = \frac{I}{2\pi as}$

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3 years ago

If the motion of the particles in the room slow down, the temperature in the room would

Goshia [24]

Answer:

Go down

Explanation:

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3 years ago

Formula for weight on moon compared to weight on earth

Rzqust [24]

Weight on moon = (0.16) • Earth weight

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3 years ago

What is the speed of light in a vacuume?

-Dominant- [34]

The speed of light in vacuum is exactly

299,792,458 meters per second.

That's so exact that it's the official scientific definition of a "meter".

The number doesn't t change even if the flashlight or other light source is moving.

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2 years ago