PHYSICS HIGH SCHOOL

A complete series circuit consists of a 12.0 V battery, a 4.70 O resistor, and a switch. The internal resistance of the battery is 0.30 O. The switch is open. What does an ideal voltmeter read when placed across the terminals of the switch?12.0 V
9.40 V
2.40 V
zero

Answers

Answer 1
Answer:
With the switch open, there's no current in the circuit, and therefore
no voltage drop across any of the dissipative elements (the resistor
or the battery's internal impedance).  So the entire battery voltage
appears across the switch, and the voltmeter reads 12.0V .

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What has the same relationship to circle : cylinder?

Answers

Circle is a plane figure ( flat , 2-dimensional)

meanwhile, cylinder is a solid figure ( 3-dimensional, can be filled with volume)

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Answers

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This time, William Tell is shooting at an apple that hangs on a tree (Fig. 3.32). The apple is a horizontal distance of 20.0 m away and at a height of 4.00 m above the ground. If the arrow is released from a height of 1.00 m above the ground and hits the apple 0.500 s later, what is the arrow’s initial velocity?

Answers

Answer:

The initial arrow's velocity is 40,9 m/s at 11.9° from the horizontal

Explanation:

In order to find the inital velocity we need to determine its components and the angle that the arrow is launched at.

For horizontal component, we will have:

ν cos(θ)t = x ⇒ cos(θ) =  x/νt

For vertical component we will have:

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From the two equations we got, after noting that the vertical displacement is 3m, we can calculate

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Now we can calculate θ = tan⁻¹(0.21125) ≈ 11.9°

Now that we know the angle we can subtitute at any of the expressions for the two components of the velocity . Let's do this subsitution at the horizontal component:

ν cos(θ)t= x =ν = x/tcos(θ)= 20/ 0.5cos(11.9) ≈ 40.9 m/s.

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Answers

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Hope this helps!
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Answers

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Answers

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