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3 years ago

8

A student will study german at last 3 years

1 answer:

Colt1911 [192]3 years ago

5 0

Answer:

i don't understand

Explanation:

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How and why does the distance between 2 electrodes affect the rate of electrolysis? ...?

Rasek [7]

<span>Nothing, in terms of the chemistry.

The distance between the electrodes affects the electrical resistance very slightly. Increasing the distance increases the resistance and reduces the current slightly, which reduces slightly the amount of product.

For most practical applications, for electrolysis done in a beaker, varying the distance between the electrodes will make little difference.

Increasing the concentration of the electrolyte will increase the current flow because there are more charged particles to carry charge, and increase the product yield.</span>

4 0

3 years ago

If an engine at sea level produces 100 horsepower, how many horsepower would it develop at 6,000 feet of altitude?

Sonja [21]

Answer:

Power develop at 6000 ft = 100 - 18 = 82 hp

Given:

Power produced by the engine at sea level = 100 hp

Explanation:

For each 1000 ft rise above the sea level, the power loss of the engine is about 3%

Therefore,

1000 ft - 3% loss

6000 ft - $3\times 6 = 18 %$

At 6000 ft, the power loss is 18% or 18 hp

Now,

Power develop at 6000 ft = Power at sea level - Power loss at 6000 ft

Power develop at 6000 ft = 100 - 18 = 82 hp

7 0

3 years ago

Which are the main regions of the periodic table? A. metals, nonmetals, gases B. solids, liquids, gases C. metals, semimetals, n

nlexa [21]

Answer:

the answer is C.

Explanation:

8 0

4 years ago

A 580-mm long tungsten wire, with a 0.046-mm-diameter circular cross section, is wrapped around in the shape of a coil and used

serious [3.7K]

Answer: 1.64 *10^19 electrons

Explanation: In order to the explain this problem we have to consider the following:

The current= charge/time; so

as the electrons move in the tungsten wire we have:

0.526 C/s= N electrons per second* charge of electron=

N electrons/s= 0.526/1.6*10^-19= 3.28 *10^18 electrons/s

Then, during 5 seconds will pass:

3.28 *10^18 electrons/s*5 5s= 1.64 *10^19 electrons

4 0

3 years ago

The maximum speed with which you can throw a stone is about 25 m/s. Can you hit a window 50 m away and 13 m up from the point wh

Nookie1986 [14]

Answer:

no, the maximum height = 12.3m

Explanation:

The equation for the trajectory of the ball for a given angle can be derived from:

(1) $x=cos\phi v_0t$

and

(2) $y=-\frac{1}{2}gt^2 +sin\phi v_0t$

Combining equation 1 and 2:

(3) $y=xtan\phi -\frac{gx^2}{2cos^2\phi v_0^2}$

Taking the derivative:

(4) $\frac{dy}{d\phi}=\frac{xsec^2\phi}{v_0^2}(v_0^2-gxtan\phi)$

Setting equation 4 equal to zero to calculate the maximum angle:

(5) $\phi=tan^{-1}(\frac{v_0^2}{gx})$

Plugging equation 5 back into equation2 confirms, the trajectory can't reach the target. The maximum height is 12.3m.

3 0

3 years ago

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