[04.05] An atom has an atomic number of 12 and a mass number of 25. How many neutrons does the atom have?

What does a worm and wheel mechanism do to torque and speed

sergejj [24]

Answer:Explanation:

Image result for what does a worm and wheel mechanism do to torque and speed

Like other gear arrangements, a worm drive can reduce rotational speed or transmit higher torque. ... Each full 360 degree turn of a single start worm advances the gear by one tooth. For a multi start worm the gear reduction equals the number of teeth on the gear divided by the number of starts on the worm.

6 0

3 years ago

If the spring constant is doubled, what value does the period have for a mass on a spring?

soldi70 [24.7K]

if spring constant is doubled, the mass on spring will be doubled as well. according to this formula, F=ke

k stands for spring constant and e stands for the length extended

4 0

2 years ago

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A nuclear power plant generates 3000 MW of heat energy from nuclear reactions in the reactor's core. This energy is used to boil

kondaur [170]

Answer:

a) $\eta_{th} = 46.1\,\%$ , b) $\eta_{th,real} = 36.667\,\%$

Explanation:

a) The maximum possible thermal efficiency of the power plant is given by the Carnot's Cycle thermal efficiency, which consider a reversible power cycle according to the Second Law of Thermodynamics, whose formula is:

$\eta_{th} = \left(1-\frac{T_{L}}{T_{H}} \right)\times 100\,\%$

Where:

$T_{L}$ - Temperature of the cold reservoir (Condenser), measured in K.

$T_{H}$ - Temperature of the hot reservoir (Evaporator), measured in K.

The maximum possible thermal efficiency is:

$\eta_{th} = \left(1-\frac{298.15\,K}{553.15\,K} \right)\times 100\,\%$

$\eta_{th} = 46.1\,\%$

b) The actual efficiency of the plant is the ratio of net power to input heat rate expressed in percentage:

$\eta_{th, real} = \frac{\dot W}{\dot Q_{in}} \times 100\,\%$

$\eta_{th, real} = \frac{1100\,MW}{3000\,MW}\times 100\,\%$

$\eta_{th,real} = 36.667\,\%$

8 0

3 years ago

Newton's second

Andru [333]

Explanation:

The second law states that the greater the mass of an object, the more force it will take to accelerate the object. There is even an equation that says Force = mass x acceleration or F=ma. This also means that the harder you kick a ball the farther it will go.

4 0

2 years ago

A sample of an ideal gas is in a tank of constant volume. The sample absorbs heat energy so that its temperature changes from 38

oksano4ka [1.4K]

Answer:

the ratio is $\frac{V_2}{V_1}=\sqrt{2}$