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3 years ago

To which end of the horseshoe magnet will the north end of the magnet be attracted

Physics

1 answer:

Scrat [10]3 years ago

7 0

Answer:

The north end of the magnet will be attracted to the south end of the horseshoe magnet.

Likewise, the north end of the magnet will be attracted to the earth's north pole - so the north pole of the earth is actually a south magnetic pole.

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In cloud formation, water vapor turns into water droplets which get bigger and bigger until it rains.

True [87]

Answer:

a. get warmer.

Explanation:

When the water vaporous reach the upper layer of the atmosphere they get a cooler air to which they loose their temperature and condense to form clouds as a the temperature of the air increases.

It may be noted that the water looses its high amount of latent heat of vaporization to condense into water this significantly increases the temperature of the air in contact.

4 0

3 years ago

A silver bar with a mass of 250.0 g is heated from 22.0°C to 68.5°C. How much heat does the silver bar absorb?

Harrizon [31]

Answer:

Q = 2790 J

Explanation:

Mass of silver bar is 250 g

It is heated from 22.0°C to 68.5°C

The specific heat of silver is 0.240 J/g°C

It is required to find the heat absorb by the silver bar. The heat absorbed by an object when heated from one temperature to another is given by :

$Q=mc\Delta T\\\\Q=250\times 0.240\times (68.5-22)\\\\Q=2790\ J$

So, the heat absorbed by the silver bar is 2790 J.

8 0

3 years ago

What is the smallest possible wavelength of light?

lilavasa [31]

Explanation:

Blue or violet light has the shortest wavelength. White light is a combination of all colors in the color spectrum.

7 0

3 years ago

A water trough is 12 feet long, and its cross section is an equilateral triangle with sides 2 feet long. Water is pumped into th

MAXImum [283]

Answer:

The water level rises at 11.76 $ft^{2} /s$

$h=\sqrt{3/2} s$ let be h: height and s: side of an equilateral triangle

Explanation:

The picture shows a diagram of the situation, first we have to determine the height of the trough as follows:

With the Pytagorean Theorem we can find out that:

$h^{2} =s^{2} -s^{2} /4 =\sqrt{3} /2 s$

Then, the area of an equilateral triangle, as any triangle, is a half of its base times its height:

$A=\frac{1}{2} hs=\frac{1}{2} \frac{\sqrt{3} }{2} s^{2} =\frac{\sqrt{3} }{4} s^{2}$

Replacing values, we have:

$A=1.73ft^{2}$

That is the total area of the trough, but the problem specifies that it has been filled until 0.5 ft. Therefore, we have to find the cross section area of the water flow by substracting the total area minus the unfilled area of the trough:

$h_{u}: height of the unfilled triangle\\s_{u} : side of the unfilled triangle\\A_{u}: area of the unfilled triangle\\h_{u}=\sqrt{3} -0.5 =1.23\\s_{u}= \frac{2}{\sqrt{3} } 1.23=1.42\\A_{u}=\frac{\sqrt{3} }{4} 1.42^{2} =0.87ft^{2} A_{u}$

Then, the cross section area of water flow is

$A_{s} =1.73ft^{2} -0.87ft^{2} =0.85ft^{2}$

Finally, to determine the speed of water flow at this point we solve for v, the flow formula:

$Q: water flow\\v: speed\\Q=vA\\v=Q/A =\frac{10ft^{3}/s }{0.85ft^{2} } =11.76 \frac{ft^{2}}{s}$

6 0

3 years ago

7.There is no gain in mechanical advantage in a single fixed pulley. En

AlexFokin [52]

Answer:

The answer to this question can be defined as follows:

Explanation:

Advantage:

The load can be raised with one fixed pulley by adjusting the shifting pressure path.
Its a fixed input pulley doesn't even have a mechanical advantage, the movement is larger than for the load.
It is preferable to use because the pulley must not be moved up or down.
It gains the measurement of just an increase in output power-to-input force ratio.

7 0

4 years ago