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3 years ago

Please help and explain please thank youu

Physics

1 answer:

vekshin13 years ago

3 0

Answer:

Series circuits = D & E

parallel circuits = C & F

Circuit C is connected in parallel and circuit D is connected in series.

Circuit D and E are the same, despite the switch is located in a different position, they are working in series.

Circuits C and F are the same, they are connected in parallel.

There will be only one bulb in on mode and it is in the circuit F.

Explanation:

In the attached image, we can see a serial circuit and a parallel circuit. Serial circuits are characterized by sharing the same current, if the current step is interrupted (opening the switch), the current will not flow and no element (light bulbs off) will work. When a circuit is connected in parallel, they share the same voltage within the circuit. All resistive elements or bulbs are located between nodes 1 and 2, so they share the same voltage.

The special case are the circuits C and F, both are connected in parallel. But in circuit C the switch is near to the voltage source, therefore when the switch is unplugged there won't be the main current and the bulbs will be off.

In-circuit F, when the switch is off only the bulb near to the switch won't work the other bulb will be working because the main current is passing through it.

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Find the time t2 that it would take the charge of the capacitor to reach 99.99% of its maximum value given that r=12.0ω and c=50

defon

Answer:

Explanation:

Given that, .

R = 12 ohms

C = 500μf.

Time t =? When the charge reaches 99.99% of maximum

The charge on a RC circuit is given as

A discharging circuit

Q = Qo•exp(-t/RC)

Where RC is the time constant

τ = RC = 12 × 500 ×10^-6

τ = 0.006 sec

The maximum charge is Qo,

Therefore Q = 99.99% of Qo

Then, Q = 99.99/100 × Qo

Q = 0.9999Qo

So, substituting this into the equation above

Q = Qo•exp(-t/RC)

0.9999Qo = Qo•exp(-t / 0.006)

Divide both side by Qo

0.9999 = exp(-t / 0.006)

Take In of both sodes

In(0.9999) = In(exp(-t / 0.006))

-1 × 10^-4 = -t / 0.006

t = -1 × 10^-4 × - 0.006

t = 6 × 10^-7 second

So it will take 6 × 10^-7 a for charge to reached 99.99% of it's maximum charge

8 0

3 years ago

Select the correct answer.

Triss [41]

Answer:

Jim's kinetic energy is 54.67 J.

Explanation:

Given that,

Mass, m = 15 kg

Velocity, V = 2.7 m/s

We need to find the Jim's kinetic energy. We know that when the object is in motion, it has kinetic energy. This energy is given by :

$E=\dfrac{1}{2}mv^2$

$E=\dfrac{1}{2}\times 15\ kg\times (2.7\ m/s)^2$

E = 54.67 J

So, Jim's kinetic energy is 54.67 J. Hence, this is the required solution.

5 0

3 years ago

A car starts from rest and accelerates uniformly over a time of 5.37 seconds for a distance of 101 m. Determine the acceleration

castortr0y [4]

Answer:

8.10m s-2

Explanation:

8 0

4 years ago

While following the directions on a treasure map a pirate walks 37.0 m north and then turns and walks 8.5 m east what is the mag

kogti [31]

Answer: $38\ m$

Explanation:

For this exercise you can use the Pythagorean theorem to find the magnitude of the resultant displacement.

Then:

$d^2=\triangle x^2+\triangle y^2$

You can observe that the square of the displacement is equal to the sum of the square of the horizontal displacement and the square of the vertical displacement.

Since the pirate walks 37.0 meters north and then turns and walks 8.5 meters east:

$\triangle x=37.0\ m\\\triangle y=8.5\ m$

Substituting values and solving for "d", you get:

$d=\sqrt{(37.0\ m)^2+(8.5\ m)^2}\\\\d=38\ m$

8 0

3 years ago

Red light has a _____ wavelength and a _____ frequency than does blue light.

Harlamova29_29 [7]

In a spectrum of visible light, we will see that red appears to have a longer wavelength than the blue light. Since wavelength and frequency are inversely proportional then, red will have a smaller frequency than does the blue light.

7 0

4 years ago