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3 years ago

Dial CALIPER ZOOM INNNN

Engineering

1 answer:

taurus [48]3 years ago

8 0

Answer:

1.142 and 5.621

Explanation:

........

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3 years ago

An uncharged capacitor is connected to a resistor and a battery. Choose what happens to current, potential difference and charge

Ilya [14]

Answer:

The charge on the plates will increase with time

The potential difference across the capacitor starts with zero and then increases gradually to a maximum value

The current through the circuit starts high and then drops exponentially

Explanation:

<u>Case : An uncharged capacitor is connected to a resistor and a battery in a closed circuit.</u>

The charge on the plates will increase with time

applying this equation : Q = $Q_{0} [ 1 - e^{\frac{-t}{RC} } ]$ as the value of (t) increases the value of Q increases i.e. charge on the plates

The potential difference across the capacitor starts with zero and then increases gradually to a maximum value

applying this equation : V = $V_{0} [ 1 - e^{\frac{-t}{RC} } ]$

The current through the circuit starts high and then drops exponentially

current : I = $I_{0} e^{\frac{-t}{RC} }$

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3 years ago

The figure below appeared three heat treatments processes of steel (A, B and C),

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Answer:

Explanation:

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3 years ago

Describe the importance of ferrite and austenite stabilizing elements in steels

podryga [215]

Answer:

The importance of ferrite and austenite stabilizing elements in steels .

Explanation:

Alloying -

The process which improves the properties of the steel by changing the chemical composition of the steel via adding some elements .

The properties can be improved by - Stabilizing Austenite and Stabilizing Ferrite .

Stabilizing austenite -

The process by which temperature is increased , in which Austenite exists .

Elements with the same crystal structure as of the austenite ( FCC ) raises its A4 value i.e. the temperature of the formation of austenite from its liquid phase and reduces the value of A3 .

Hence, the elements are -

Cobalt , Nickel , Manganese , Copper.

The examples of the Austenitic steels are -

Hadfield Steel ( 13% Mn , 1.2% Cr , 1% C ) and Austenitic Stainless steel.

Stabilizing ferrite –

The process by which temperature is decreased , in which austenite exists .

Elements with the same crystal structure as of the ferrite (BCC - Cubic body centered ) lowers its A4 value i.e. the temperature of the formation of austenite from its liquid phase and increases the value of A3 .These elements have lower solubility of carbon in austenite, that lead to increase in the amount of carbides in the steel.

Hence, the elements are -

Aluminium , Silicon , Tungsten , Chromium , Molybdenum , Vanadium

The examples of the Ferritic steels are -

F-Cr alloys , transformer sheets steel ( 3% Si ).

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4 years ago

1. Which of the following is NOT an example of a lever?

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A staircase what makes it a lever is another objects used to displace the force better

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4 years ago