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3 years ago

Why would a red apple appear black if you looked at it through a blue filter?

1 answer:

4 0

<span>Because the reflected red light from the apple will not pass through the blue filter and since no light gets through it will appear black.</span>

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Frequency refers to the number of wavelengths that pass a fixed point in a minute. true or false

Art [367]

Frequency refers to the number of wavelengths that pass a fixed point in a minute. true or false

Answer:True

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4 years ago

You extend an impromptu invitation to a friend for dinner. The only food you have is a couple of frozen steaks. You wish to defr

kakasveta [241]

Answer:

Microwave: Radiation

Water: Conduction, convection & radiation.

Explanation:

When we heat a food using microwave then the water content of the food is only heated by the microwave.

Microwaves make the molecules of water vibrate frequently with a frequency closer to the frequency of microwaves and this increases the kinetic energy of the molecules which produces heat in the water molecules this heat then propagates to the whole food by conduction and convection, but the heat enters the food only via radiation.

Now when the food item is kept into warm water then the molecules closer to the food heat the food by conduction through direct energy transfer by lattice vibrations and when they become cooler than the mass of water all around then due to density difference they settle down and their place is occupied by warmer molecules around in the fluid leading to convection.

Radiation of energy from a mass occurs continuously irrespective of the medium present there. So the heat of water also enters the food by radiation of energy from the water molecules.

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3 years ago

Help me please Ima give brainiest

julsineya [31]

Sand. You can identify tiny sugar crystals.

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3 years ago

Read 2 more answers

Air Pressure ______ With Elevation. (A) Increases (B) Decreases (C) Does Not Change

Mnenie [13.5K]

Air pressure ''Decreases'' with Elevation. So B) would be your answer.

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3 years ago

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An RLC circuit is used in a radio to tune into the radio lagos fm Station broadcasting at 93.5Hz. The resistance is 15ohms and t

bazaltina [42]

The characteristics of the RLC circuit allow to find the result for the capacitance at a resonance of 93.5 Hz is:

Capacitance is C = 1.8 10⁻⁶ F

A series RLC circuit reaches the maximum signal for a specific frequency, called the resonance frequency, this value depends on the impedance of the circuit.

$Z^2 = R^2 + ( wL - \frac{1}{wC} )^2$

Where Z is the impedance of the circuit, R the resistance, L the inductance, C the capacitance and w the angular velocity. The negative sign is due to the fact that the current in the capacitor and the inductor are out of phase.

In the case of resonance, the impedance term completes the circuit as a resistive system.

$wL - \frac{1}{wC} = 0 \\w^2 = \frac{1}{LC}$

Indicate that the inductance L = 1.6 H and the frequency f = 93.5 Hz.

Angular velocity and frequency are related.

w = 2π f

Let's substitute.

$C = \frac{1}{L ( 2 \pi f)^2 }$

Let's calculate.

$C = \frac{1}{1.6 \ ( 2\pi \ 93.5)^2}$

C = 1.8 10⁻⁶ F

In conclusion with the characteristics of the RLC circuits we can find the result for the capacitance at a 93.5 Hz resonance is:

Capacitance is C = 1.8 10⁻⁶ F

Learn more about serial RLC circuits here: brainly.com/question/15595203

4 0

2 years ago