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Svet_ta [14]
3 years ago
8

Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill?

Physics
1 answer:
Degger [83]3 years ago
5 0
B. kinetic energy increases and potential energy decreases
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How does the atmosphere’s interaction with different wavelengths of light help to protect life on earth?
marishachu [46]

Answer:

Ozone layer in the upper atmosphere filters most of the harmful radiations of shorter wavelength. It actually absorbs the hazardous radiations like ultraviolet, gamma rays, x- rays and most of all those having shorter wavelength then the visible light. That's how the earth's atmosphere protects life on earth. But unfortunately, climate change and global warming is causing the depletion of ozone layer which is causing skin related diseases and harming not only the human life but also the plants and animals.

4 0
3 years ago
The frequency of a sound wave is commonly called
Rzqust [24]
The answer is Hertz (Hz) named in honor of the German scientist Heinrich Hertz, who first conclusively proved the existence of electromagnetic waves.
3 0
3 years ago
Water flows through a pipe of
snow_lady [41]

Answer:

9.38 m/s

Explanation:

Mass is conserved.

m₁ = m₂

ρ₁ Q₁ = ρ₂ Q₂

Assuming no change in density:

Q₁ = Q₂

v₁ A₁ = v₂ A₂

v₁ π r₁² = v₂ π r₂²

v₁ r₁² = v₂ r₂²

Plugging in values:

(1.50 m/s) (0.0250 m)² = v (0.0100 m)²

v = 9.38 m/s

3 0
3 years ago
Which describes the wavelength of a wave?
NARA [144]
<span>So we want to know what physical quantity represents the wavelength of a wave. Waves have a few phyiscal quantities that are used to describe them. Frequency, amplitude and wavelength. Frequency is the number of oscillations in a specific time interval, amplitude is the maximal elongation of a wave and wavelength is the distance from one point ona a wave to the next similar point. So the correct answer is B. </span>
6 0
3 years ago
The three elements of emotion are?
Alona [7]

Answer: Physical component- state of physiological arousal triggered by autonomic nervous system

Behavioral component- outward expression of emotion, including facial expression and behavior

Cognitive component- appraisal of the situation determine which emotion we are experiencing and why.

Explanation:

hope that helps :)

5 0
3 years ago
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