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3 years ago

if the lit light bulb was replaced with a bulb that had a higher resistance what would happen to the new light bulb

1 answer:

6 0

You haven't given us enough information to figure out an answer.

It depends on whether the light bulb is part of a series or parallel circuit,
and whether there are also OTHER light bulbs in the same circuit.

-- If the light bulb is the ONLY one in the circuit, or if it's one of
several bulbs that are connected in parallel across the same battery,
and you replace it with a bulb that has higher resistance, then the
new one will be LESS BRIGHT than the original one.

-- If the light bulb is one of two or more bulbs connected in series
across the battery, and you replace it with a bulb that has higher
resistance, then the new one will be BRIGHTER than the original
one was.

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The pressure drop needed to force water through a horizontal 1-in diameter pipe if 0.60 psi for every 12-ft length of pipe. Dete

oksian1 [2.3K]

Answer:

The shear stress at a distance 0.3-in away from the pipe wall is 0.06012lb/ft²

The shear stress at a distance 0.5-in away from the pipe wall is 0

Explanation:

Given;

pressure drop per unit length of pipe = 0.6 psi/ft

length of the pipe = 12 feet

diameter of the pipe = 1 -in

Pressure drop per unit length in a circular pipe is given as;

$\frac{\delta P}{L} = \frac{2 \tau}{r} \\\\$

make shear stress (τ) the subject of the formula

$\frac{\delta P}{L} = \frac{2 \tau}{r} \\\\\tau = \frac{\delta P *r}{2L}$

Where;

τ is the shear stress on the pipe wall.

ΔP is the pressure drop

L is the length of the pipe

r is the distance from the pipe wall

Part (a) shear stress at a distance of 0.3-in away from the pipe wall

Radius of the pipe = 0.5 -in

r = 0.5 - 0.3 = 0.2-in = 0.0167 ft

ΔP = 0.6 psi/ft

ΔP, in lb/ft² = 0.6 x 144 = 86.4 lb/ft²

$\tau = \frac{\delta P *r}{2L} = \frac{86.4 *0.0167}{2*12} =0.06012 \ lb/ft^2$

Part (b) shear stress at a distance of 0.5-in away from the pipe wall

r = 0.5 - 0.5 = 0

$\tau = \frac{\delta P *r}{2L} = \frac{86.4 *0}{2*12} =0$

3 0

3 years ago

T/F climate can change quickly

Vitek1552 [10]

bhdfbvhfdbvhhfhvfhdf vfdhybvghbhdf

4 0

2 years ago

Your classmate says that if all the molecules in a particular liquid had the same speed, and some were able to evaporate, the re

babymother [125]

The molecules which evaporate presumably take heat away from the liquid. So, I'd disagree with the classmate. Whether the amount of cooling would differ from the usual case wherein the molecules have different speeds is another question.
I guess the argument goes something along the lines of that the faster moving and therefore most kinetically energetic molecues evaporate and take away most heat. But if there's no faster moving molecules, 'cos they all have the same speed well, then presumably they'd all take away the same amount of heat. So, maybe the cooling would be less. No cooling though ??? Hmmmm dunno .... i think not ....

3 0

3 years ago

Read 2 more answers

Who was the first known contributor to the atomic theory? Select one: a. Thomson b. Bohr c. Dalton d. Democritus

ser-zykov [4K]

It would be D Democritus
He contributed in around 460-370 BC
Whereas the others contributed much later from around 1700's - 1900's

6 0

3 years ago

An ice skater at rest pushes against a sled at rest,causing both the skater and sled to move away from each other with different

astraxan [27]

Answer:

Newton's third law of motion.

Explanation:

An ice skater at rest pushes against a sled at rest,causing both the skater and sled to move away from each other with different acceleration. It is based on Newton's third law of motion.

Third law says that, for every action there is an equal; and opposite reaction. Here, action is force applied by ice skater and reaction is motion of skater and sled away from each other with different acceleration.

3 0

2 years ago