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3 years ago

Using bearings will cause more friction. A.True B.False

1 answer:

5 0

(False) bearings reduce friction by using smooth balls lubricated with oil or grease that freely roll between a smooth inner and outer surface. The main concept of the ball bearing is that objects that roll past each other produce less friction than if the objects were sliding against each other.

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A 240 V, 60 Hz squirrel-cage induction motor has a full-load slip of 0.02 and a full-load speed of 1764 rpm. The winding resista

earnstyle [38]

Answer:

full load current = 7.891151 A

so correct option is b. Ir= 7.89

Explanation:

given data

Energy E = V = 240 V

frequency = 60 Hz

full-load slip = 0.02

full-load speed = 1764 rpm

winding resistance = 0.6 Ω

winding reactance = 5 Ω

to find out

rotor current at full-load

solution

we will apply here full load current formula that is express as

full load current = $\frac{S*E}{\sqrt{R^2+ (S*X)^2}}$ ...................1

here S is full-load slip and E is energy given and R is winding resistance and X is winding reactance

put here value we get

full load current = $\frac{0.02*240}{\sqrt{0.6^2+ (0.02*5)^2}}$

full load current = 7.891151 A

so correct option is b. Ir= 7.89

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3 years ago

In which of the following states would homes most likely have the deepest foundation?

Evgen [1.6K]

Answer:

D) Louisiana, to prevent homes from blowing away in hurricanes.

Explanation:

Louisiana is famous for hurricanes i think that if they were well prepared and had deeper foundation the damage may lower by a good lot.

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3 years ago

Use the image below to measure the blocks. Enter your measurement in centimeters accurate to the 0.1 cm.

SOVA2 [1]

Answer:

Pink block = 1.4 cm

Green block= 1.5 cm

Blue block= 1.7 cm

Explanation:

Hi, the ruler is in centimeters, from left to right each long line ( the ones with the number ) is a centimeter.

Since 10 millimeter equals 1 centimeter each short line is a millimeter (0.1 cm)

Knowing this, the measures of each block are.

Pink block = 1.4 cm

Green block= 1.5 cm

Blue block= 1.7 cm

Feel free to ask for more if needed or if you did not understand something.

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4 years ago

Which activity promotes the preservation of species

miv72 [106K]

Answer:

Explanation:

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3 years ago

Why are there few effective HCI standards?

Oliga [24]

Answer:

<em>There are few effective Human Computer Interaction (HCI) standards because for one, standards are more suitable for hardware than software because they are relatively unstable. ... Some software product standards have been in place long before any formal standard documents were published.</em>

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3 years ago