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Vaselesa [24]
3 years ago
7

A 3-phase stepping motor is to be used to drive a linear axis for a robot. The motor output shaft will be connected to a screw t

hread with a screw pitch of 1 mm. We want to be able to have a spatial control of at least 0.05 mm. a)How many poles should the motor have?
Chemistry
1 answer:
Gre4nikov [31]3 years ago
8 0

Answer:

The  number of poles is 12.

Explanation:

The step angle is given by

\phi=\frac{360^{\circ}}{N}

Where

\phi_1 is the step angle

To Find the Step angle of the Stator

\phi_1=\frac{360^{\circ}}{N_s}

Where

\phi_1  is the step angle

N_s is the number of poles or teeth on stator

To Find the Step angle of the Rotor

\phi_2=\frac{360^{\circ}}{N_r}

where

\phi_2  is the step angle

N_r is the number of poles or teeth on rotor

In the question it is stated that

N_s+ N_r = \frac{1}{0.05}

N_s+ N_r = 20

Selecting N_s= 12 and N_r= 8  

\phi = \phi_2 -\phi_1  

=\frac{(360^{\circ})}{8}- \frac{(360^{\circ})}{12}

=45^{\circ}-30^{\circ}  

=15^{\circ}

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when 1.570 grams of the compound is vaporizedar 300 degrees celius and 1 atmosphere, the gas occupies a volume of 577 milliliter
Archy [21]

Answer:

128 g/mol

Explanation:

The molar mass is how much a mol of the substance weight.

In this question the weight is given (1.570 g).

To find the number of moles in the sample, we use the ideal gas law: PV=RnT

P= 1atm

V= 577mL= 0.577L

R (universal gas constant)= 0.08206(\frac{atm*L}{mol*K})

n= number of moles

T= 300°C= 573.15K

Solving for n:

n= \frac{1 atm*0.577L}{0.08206\frac{atm*L}{mol*K}*573.15} <em>k</em>

n=0.0123mol

Molar mass=\frac{1.570g}{0.0123 mol}

Molar mass=128\frac{g}{mol}

7 0
3 years ago
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Could someone help with this? Much appreciated!
alekssr [168]

Answer:

The 3rd answer down.

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Explanation:

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The oxygen ion in Na²O has 2 extra electrons which makes it highly charged and very attractive to hydrogen ions. The attraction is so strong that when Na²O comes in contact with H²O, the O(-2) strips off a hydrogen from water, forming 2 x OH ions which of course are still strongly basic.

6 0
3 years ago
HELP ME please i need help with this
nadezda [96]
4)
a) Natural selection will work negatively against rabbits that only eat berries as the drought is preventing berries from growing. It wont have any negative impact on rabbits that only eat grass as the grass is still surviving.

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What can be absorbed or produced as the result of a chemical reaction???
tia_tia [17]
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6 0
4 years ago
Oh, no! You just spilled 85.00 mL of 1.500 M sulfuric acid on your lab bench and need to clean it up immediately! Right next to
vredina [299]

Explanation:

We will balance equation which describes the reaction between sulfuric acid and sodium bicarbonate: as follows.

   H_2SO_4(aq) + 2NaHCO_3(s) \rightarrow Na2SO_4(aq) + 2H_2O(l) + 2CO_2(g)

Next we will calculate how many moles of H_2SO_4 are present in 85.00 mL of 1.500 M sulfuric acid.

As,       Molarity = \frac{\text{moles of solute}}{\text{liters of solution&#10;}}

            1.500 M = \frac{n}{0.08500 L&#10;}

                    n = 0.1275 mol H_2SO_4

Now set up and solve a stoichiometric conversion from moles of H_2SO_4  to grams of NaHCO_3. As, the molar mass of NaHCO_3 is 84.01 g/mol.

 0.1275 mol H_2SO_4 \times (\frac{2 mol NaHCO_3}{1 mol H_2SO_4}) \times (\frac{84.01 g NaHCO_3}{1 mol NaHCO_3})

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So unfortunately, 15.00 grams of sodium bicarbonate will "not" be sufficient to completely neutralize the acid. You would need an additional 6.42 grams to complete the task.

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