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3 years ago

Indica si es mayor que, igual que, o menor que (<,>,=) -4_3 5_-5 -6_0 -4_-12 -9_1 -8_100 -90_5 -3_-2 -7_-5 10_3

Mathematics

1 answer:

natita [175]3 years ago

7 0

Answer:

-4<3, 5>-5, -6<0, -4>-12, -9<1, -8<100, -90<5, -3<-2, -7<-5, 10>3

Step-by-step explanation:

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Can someone help me with this question?

Evgen [1.6K]

I think the answer is 120

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3 years ago

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

Translate the following phrase to a mathematical expression: a number times fifteen.

crimeas [40]

Answer:

it could either be n15

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8 0

2 years ago

Read 2 more answers

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galina1969 [7]

$8250 - $3120 = $5130

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2 years ago

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Romashka [77]

Answer:

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Step-by-step explanation:

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This function describes a parabola with zeros at x=0 and x=500. The vertex (maximum) will be located halfway between these, at x=250.

The maximum size pen has area ...

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3 years ago