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Elden [556K]
3 years ago
5

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
Physics
2 answers:
uysha [10]3 years ago
6 0

Answer:

12.0V is correct !!

Explanation:

RoseWind [281]3 years ago
4 0

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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Block 1 (mass 2.00 kg) is moving rightward at 10.0 m/s and block 2 (mass 5.00 kg) is moving rightward at 3.00 m/s. The surface i
DaniilM [7]

Answer:

a) 0.25m

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Explanation:

When the spring is compressed both boxes are moving with the same velocity, so applying the principle of linear momentum conservation:

m1*v_{o1}+m2*v_{o2}=(m1+m2)*v\\v=5m/s

Now applying the principle of energy conservation:

K1+K2+U_{g1}-U_e=Kf+U_{g2}\\K1+0-U_e=K2+0\\U_e=K1+K2-kf\\\frac{1}{2}*k*x^2+=\frac{1}{2}*m1*v1^2+\frac{1}{2}*m1*v1^2-\frac{1}{2}*(m1+m2)*v^2\\\\x=\sqrt{\frac{2.00kg*(10m/s)^2+5.00kg*(3.00m/s)^2-7.00kg*(5m/s)^2}{1120N/m}}\\x=0.25m

We got that the maximum compression is 0.25m.

5 0
3 years ago
which statements about acceleration are true? check all that apply. a. the si units of acceleration are m/s2. b. for acceleratio
tatiyna

The first thing you should know is that acceleration is a vector, therefore, it has magnitude, and direction.

By definition, we have that the vector acceleration is given by:

a = \frac{dv}{dt}\\

Where,

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Therefore, the units of the vector acceleration are:

a = \frac{\frac{m}{s}}{s}\\

a = \frac{m}{s^2}

The symbol of acceleration is:

a^{->}

Answer:

The statements about acceleration that are true are:

a. the si units of acceleration are m/s2.

b. for acceleration, you must have a number, a unit, and a direction.

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Naddik [55]

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Radiation: The heat we feel from the sun.
3 0
3 years ago
True or false: (a) Maxwell's equations apply only to fields that are constant over time.(b) The wave equation can be derived fro
Andre45 [30]

Answer:

(a) False

(b) True

(c) True

(d) True

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(f) In free space or in vacuum the energy density of the electromagnetic wave is divided equally in both the fields and hence are equal.

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