The observable universe<span> is a spherical region of the </span>Universe, <span>comprising all matter that can be observed from Earth at the present time, because light and other signals from these objects have had time to reach Earth since the beginning of the cosmological expansion.
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Answer:
Frequency is the number of wavelengths, which is measured in hertz.
Explanation:
I have my ways ;)
To act as the Sun' was accepted but if you put 'sunlight' alone it was not accepted. The examiner wanted you to state that the infra red radiation was needed to warm up the water.
Answer:
1. What is not considered a cardiovascular workout?
A. Jogging
B. Sit ups
C. Jump Ropes
D. Burpees
Explanation:
I am sorry, I am in middle school and I only have one question.
A shorter electromagnetic wave is hotter.
A shorter electromagnetic wave produce heat hotter than ultraviolet rays. Because it produces both gamma rays and ultraviolet rays that makes it hotter that the heat of the sun.
