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iVinArrow [24]
3 years ago
15

Answer the following question below.

Mathematics
1 answer:
kotykmax [81]3 years ago
3 0
If I’m right I think the answer is 1,759.32
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The heat developed in an electric wire varies jointly as the wires resistance, the time the current flows, & the square of t
never [62]

Answer:

4 ohms

Step-by-step explanation:

The question is "In two minutes a current of 5 amps develops 1,200 heat units in a wire of 8 ohms resistance. What resistance does a similar wire have, which develops 6,000 heat units with a current of 10 amps in 5 minutes?"

Current, I₁ = 5 A

Heat, Q₁ = 1200 units

Resistance, R₁ = 8 ohms

Time, t₁ = 2 min = 120 s

New heat, Q₂ = 6000 units

Current, I₂ = 10 A

New time, t₂ = 5 min = 300 s

We need to find the new resistance.

Heat developed is given by :

Q=I^2Rt

\dfrac{Q_1}{I_1^2R_1t_1}=\dfrac{Q_2}{I_2^2R_2t_2}\\\\R_2=\dfrac{Q_2\times I_1^2R_1t_1}{Q_1I_2^2t_2}\\\\R_2=\dfrac{6000\times 5^2\times 8\times 120}{1200\times 10^2\times 300}\\\\=4\ \Omega

So, the new resistance is 4 ohms.

5 0
2 years ago
HELP PLZ PICTURE^ Need it asap porfa
timurjin [86]

Answer:

it has one solution

Step-by-step explanation:

1.y=x-3

2. 3y-3x sub x-3 in place of y therefore

it can also be written as 3x-3x-9=9

if you add 9 to both sides 3x-3x-9+9=-9+9

0+0=0

3 0
3 years ago
How many unique triangles can be made where one angle measures 60 degrees and another is an obtuse angle
Svet_ta [14]
An acute angle can also be made inside of that type of triangle.
4 0
3 years ago
HELP ME ASAP BRAINLIEST UP FOR GRABS
Volgvan

Answer:

52.0 m

Step-by-step explanation:

The triangle formed by the flagpole, the ground and the 30° line is a right triangle, with x as the required length to be found.

Using the tangent ratio

tan30° = \frac{opposite}{adjacent} = \frac{30}{x} ( multiply both sides by x )

x × tan30° = 30 ( divide both sides by tan30° )

x = \frac{30}{tan30} ≈ 52.0 m

6 0
3 years ago
Find the missing length marked with a question mark.<br> UVW-USR
mariarad [96]

Given:

\Delta UVW\sim \Delta USR

To find:

The missing length marked with a question mark.

Solution:

Let x be the missing value.

We have,

\Delta UVW\sim \Delta USR

Corresponding sides of similar triangles are proportional, so

\dfrac{UV}{US}=\dfrac{VW}{SR}=\dfrac{UW}{UR}

Using this, we get

\dfrac{UV}{US}=\dfrac{UW}{UR}

On substituting the values, we get

\dfrac{70}{x}=\dfrac{55}{44}

\dfrac{70}{x}=\dfrac{5}{4}

On cross multiplication, we get

70\times 4=5\times x

280=5x

\dfrac{280}{5}=x

56=x

Therefore, the missing length is 56 units.

3 0
2 years ago
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