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3 years ago

WILL GIVE BRAINLEST!!! what is the total resistance and total current of the circuit.

Physics

1 answer:

Virty [35]3 years ago

6 0

Answer: 6Ω

Explanation:

top line 1Ω in series with 5Ω = 6Ω

6Ω in parallel with 6Ω = 3Ω

3Ω in series with 3Ω is 6Ω

this 6Ω is in parallel with the middle line which is

4Ω in parallel with 12Ω = 3Ω

3Ω in series with 9Ω is 12Ω

This mean the top and middle are equivalent to 6Ω in parallel with 12Ω = 4Ω

This 4Ω is in series with the bottom line 2Ω to make 6Ω

Series equivalent Re = R₁ + R₂

Parallel equivalent Re = 1 / (1/R₁ + 1/R₂)

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An aluminum calorimeter with a mass of 100 g contains 250 g of water. The calorimeter and water are in thermal equilibrium at 10

Nadya [2.5K]

Answer:

1822.14 J/kg C

Explanation:

Mass of aluminum = 0.100 kg

Mass of Water = 0.250 kg

Mass of copper = 0.300 kg

Mass of unknown object = 0.70 kg

Initial temperature of Aluminum = 10 C

Initial temperature of water = 10 C

Initial temperature of copper = 30 C

Initial temperature of = 100 C

Final temperature of all substances = 20 C

Change in temperature of each of them Aluminum, water , copper and unknown material respectively = 10 C , 10 C , -10 C, -80 C respectively

Specific heat of each of them Aluminum, water , copper and unknown material respectively = 900,4186,387 and c respectively.

Heat gained by aluminum and water = (0.1)(900)(10) + (0.250)(4186)(10) = 11365 j

heat lost by copper and unknown material =(0.3)(387)(-10) = -1161

heat lost by unknown material = (0.070)(c)(-80) = -5.6 c

Now solve for c using the calorimetry principle.

Heat lost + Heat gained = 0

⇒ -5.6 c = -11365 - (-1161) = -10204 j

Specific heat of unknown material = - 10204 / -5.6

= 1822.14 j/kg C

b) Material having a specific heat of 1800 j /kg C is

Polyurethane elastomer.

4 0

3 years ago

The equivalent resistance of two resistors connected in series is always greater than the equivalent resistance of the same two

seraphim [82]

Answer:

True

Explanation:

Because the resistors in series is the sum of the two resistors given as

R= R1+R2

While that of resistors in parallel is the sum of the reciprocal of the resistance given as

1/R = 1/ R1+ 1/R2

So that of series connection will be greater

4 0

3 years ago

True or False? In the quark era, it was so hot that matter and

Eva8 [605]

Answer:

False

Explanation:

Great educated guess energy and matter is different

8 0

4 years ago

A 70 kg sailor climbs a 28.3 m rope ladder up a mast. How much work did he do?

juin [17]

Answer:

answer b is correct

mark brainliest

Explanation:

7 0

2 years ago

A 2.5. Gram arrow enters a 100 g apple with a speed of 115 m/s. If the apple was originally at rest, then what speed will it hav

stich3 [128]

Answer:

The speed of the apple will be 2.81 m/s when the arrow enters it.

Explanation:

We can find the speed of the apple by conservation of linear momentum:

$p_{i} = p_{f}$

$m_{ap}v_{ap_{i}} + m_{a}v_{a_{i}} = m_{ap}v_{ap_{f}} + m_{a}v_{a_{f}}$

Where:

$m_{ap}$ is the mass of the apple = 100 g = 0.1 kg

$m_{a}$ is the mass of the arrow = 2.5 g = 0.0025 kg

$v_{ap_{i}}$ and $v_{ap_{f}}$ is the initial and final speed of the apple respectively

$v_{a_{i}}$ and $v_{a_{f}}$ is the initial and final speed of the arrow respectively

Since the apple was originally at rest ( $v_{ap_{i}}$ = 0) and knowing that $v_{a_{f}}$ = $v_{ap_{f}}$ when the arrow enters into the apple, we have:

$0 + 0.0025 kg*115 m/s = v(0.0025 kg + 0.1 kg)$

$v = 2.81 m/s$

Therefore, the speed of the apple will be 2.81 m/s when the arrow enters it.

I hope it helps you!

5 0

3 years ago