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Sonja [21]
3 years ago
11

1. What type of electromagnetic waves do cell phones use? I WILL MARK AS BRAINLIEST

Physics
1 answer:
Yakvenalex [24]3 years ago
3 0

Answer:

Radio waves

Explanation:

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Which items or activities should a pregnant woman avoid to maintain her health and the health of her fetus? Check all that apply
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How many hours are in a month of 30 days?
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4 years ago
Two lightbulbs work on a 120-V circuit One 50 W and the other is 100 W. Which bulb has a higher resistance? Explain pls!!!!
Sladkaya [172]

Answer:

Bulb 1 has more resistance.

Explanation:

Given that,

Two lightbulbs work on a 120-V circuit.

The power of circuit 1, P₁ = 50 W

The power of circuit 2, P₂ = 100 W

We need to find the bulb that has a higher resistance.

The power of the bulb is given by :

P = \dfrac{V^2}{R}

For bulb 1,

R_1=\dfrac{V^2}{P_1}\\\\R_1=\dfrac{(120)^2}{50}\\\\R_1=288\ \Omega

For bulb 2,

R_2=\dfrac{V^2}{P_2}\\\\R_2=\dfrac{(120)^2}{100}\\\\R_2=144\ \Omega

So, bulb 1 has higher resistance.

8 0
3 years ago
Why are mineral bands in metamorphic rocks light and dark colored?
Lera25 [3.4K]

Answer:Dark minerals rich in iron and magnesium separate from light minerals rich in silica and aluminum.

Explanation: Metamorphic rocks are rocks formed as a result of the transformation of other existing rocks which can be Igneous or Sedimentary rocks,this transformation process is called METAMORPHISM. During metamorphism,rocks under Serious levels of stress which can lead to the separation of materials.

During this separation process,Dark minerals rich in iron and magnesium are separated from light minerals rich in silica and aluminum.

4 0
3 years ago
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