Answer: Infrared light
Explanation:
Infrared light is an electromagnetic radiation which has longer wavelength than visible light.
cool and faint objects are difficult to be detected using visible light.
Infrared light can pass through dust and clouds of gases. Thus, it is the best way to study the young stars hidden behind interstellar dust clouds.
Answer:
The resistance of the inductor at resonance is 258.76 ohms.
Explanation:
Given;
resistance of the resistor, R = 305 ohm
capacitance of the capacitor, C = 1.1 μF = 1.1 x 10⁻⁶ F
inductance of the inductor, L = 42 mH = 42 x 10⁻³ H = 0.042 H
At resonance the inductive reactance is equal to capacitive reactance.
Where;
F₀ is the resonance frequency
The inductive reactance is given by;
Therefore, the resistance of the inductor at resonance is 258.76 ohms.
It is <span>C. Low to moderate level of exertion can be sustained over long periods of time </span>
The material that transmits most light is d) clear glass.
Explanation:
Depending on whether objects can transmit light or not, they can be classified into three types:
- Opaque: an object opaque does not transmit light at all (light cannot pass through an opaque object). Examples of opaque objects are metals
- Translucent: translucent objects allow light to pass partially through them. Examples of translucent objects are fluids
- Transparent: transparent objects allow light to pass through them. An example of transparent objects is clear glass
In this problem, we have the following objects:
- Umbrella: it is opaque, light does not pass through it
- Blanket: it is opaque, light does not pass through it
- Mirror: It is opaque, since it reflects light (light does not pass through it)
- Clear glass: it is a transparent object
Therefore, the material that transmits most light is d) clear glass.
Learn more about light:
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A) We know that:
Pressure = Force / Area
And for a spring,
F = kx, where k is the spring constant and x is the change in length.
P = kx/A; P = 101325 Pa
101325 = 3900x / (0.02²π)
x = 0.033 m or 3.3 cm
b) Work = 1/2 kx²
= 1/2 * 3900 * (0.033)²
= 2.12 Joules
