3 years ago

Which is not poor conductor?

Physics

1 answer:

lawyer [7]3 years ago

4 0

Answer:

Metal vase

Explanation:

Pure water is not a good conductor, and neither is plastic or cotton. Metal is the only one of the four that actually is a good conductor. For example, lighting hitting metal, this happens because the lightning connects to anything that has some kind of conductant.

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What are the name of variables that do not change through out and experiment?

kifflom [539]

Answer:

The answer is C

Explanation:

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3 years ago

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Celina has a water sample that's contaminated with salt and microorganisms. Which method should she use to purify the water.

sergiy2304 [10]

She should filter the water with carbon and oxygen

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3 years ago

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Assume it takes 10 J to stretch a spring 10 cm beyond its natural length. Find the work required (in Joules) to stretch the spri

Lady bird [3.3K]

Answer:

W = 30 J

Explanation:

given,

Work done = 10 J

Stretch of spring, x = 0.1 m

We know,

dW = F .dx

we know, F = k x

$\int dW = \int_0^{0.1} k.x dx$

$W = \int_0^{0.1} k.x dx$

$W = k[\dfrac{x^2}{2}]_0^{0.1}$

$10 = k\dfrac{0.1^2}{2}$

k = 2000

now, calculating Work done by the spring when it stretched to 0.2 m from 0.1 m.

$W = \int_{0.1}^{0.2} 2000 x dx$

$W = 2000 [\dfrac{x^2}{2}]_{0.1}^{0.2} dx$

W = 1000 x 0.03

W = 30 J

Hence, work done is equal to 30 J.

4 0

3 years ago

A delivery truck leaves a warehouse and travels 2.60 km north. The truck makes a right turn and travels 1.33 km east before maki

charle [14.2K]

Answer:

$AD\approx1.7582\ km$

Explanation:

Follow the schematic in which point A is the warehouse and point D is the destination.

Now we observe the triangle constructed $\Delta ADB$ :

here:

$AB\perp BD$

$AB=2.6-1.45$

$AB=1.15\ km$

$BD=1.33\ km$

As we know that displacement is the shortest distance between two points.

<u>Using Pythagoras theorem:</u>

$AD=\sqrt{AB^2+BD^2}$

$AD=\sqrt{(1.15)^2+(1.33)^2}$

$AD\approx1.7582\ km$

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3 years ago

estimate the number of table tennis balls that would fit (without being crished) into a room that is 4 m long, 4 m wide, and 3 m

Mumz [18]

The diameter of a ball is 3.8 cm.

Because 400/3.8 = 105.26,
each dimension of 400 m can accommodate 105 balls.
Similarly, because 300/3.8 = 78.95,
each dimension of 300 m can accommodate 78 balls.

The total number of balls is 105*105*78 = 859,950

Answer: 859,950 balls

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3 years ago