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3 years ago

What is the approximate increase in size from a 1 w to a 2w carbon resistor?

1 answer:

8 0

Since the 2-watt jobber has to dissipate twice as much power as the smaller unit I would expect it to have double the surface area. So if they are the usual cylindrical striped resistors then the larger one could have either double the length or else 1.4 times the radius of the smaller one.

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Niobium metal becomes a superconductor (with zero electrical resistance) when cooled below 5.1 K. The permeabilty of free space

katovenus [111]

Answer:

687.5 A

Explanation:

We are given that

$\mu_0=1.25664\times 10^{-6}N/A^2$

Magnetic field,B=0.11 T

Diameter,d=2.5mm

Radius,r= $\frac{d}{2}=\frac{2.5}{2}mm=1.25\times 10^{-3} m$

$1mm=10^{-3} m$

We know that current in coil

$I=\frac{2\pi rB}{\mu_0}$

Substitute the values

$I=\frac{2\pi\times 1.25\times 10^{-3}\times 0.11}{1.25664\times 10^{-6}}$

$I=687.5 A$

8 0

3 years ago

What would be the best method to separate only iron fillings from a mixture of sand, water, iron filings, and salt

IrinaVladis [17]

Use a magnet idk the details hope this helps

8 0

3 years ago

Read 2 more answers

If a circling object is released, centrifugal force will make it travel away from the center of its original path.

9966 [12]

The answer is True. The object is thrown away from the center of its original path due its inertia. Centrifugal force acts in the opposite direction as centripetal force. Centripetal force applies towards the center of the curvature in a spinning object. Centrifugal force is considered an apparent force while centripetal force is an actual force.

5 0

3 years ago

Up-regulation involves the loss of receptors and prevents the target cells from overreacting to persistently high hormone levels

kotegsom [21]

Answer:

False.

Explanation:

Up regulation involves the increase of receptors and it makes the cells more sensitive to the hormones.It's the down regulation that involves the loss of receptors and prevents the target cells from overreacting to persistently high hormone levels.

5 0

3 years ago

What type force is your answer in number 4

Alexandra [31]

When an object is stationary all the forces acting on the object comes in equilibrium with each other.

The forces acting on a stationary object are:

Normal force (upwards)
Gravitational force (downwards)
push force
friction force

All these forces cancel out each other.

3 0

3 years ago