We spend our lives in visible light without risks to our health. Yet exposure to UV waves in sunlight can cause skin cancer. What is the BEST explanation for this?A) UV waves are longer and carry more energy.
B) UV waves are higher frequency and carry more energy.
C) UV waves have a lower frequency and carry more energy.
D) UV waves travel faster than visible light and have more energy.
Answers
B) UV waves are higher frequency and carry more energy.
In fact, UV waves have higher frequency than visible light. For comparison, visible light has frequency in the range 430-770 THz (
The energy of electromagnetic radiation is proportional to its frequency, according to the equation
where h is the Planck constant and f is the frequency. We see that the higher the frequency, the greater the energy, so UV waves carry more energy than visible light.
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An object of unknown mass is initially at rest and dropped from a height h. It reaches the ground with a velocity v sin θ / g 1. The same object is then raised again to the same height h but this time is thrown downward with velocity υ1 It now reaches the ground with a new velocity υ2. How is v2 related to v1?
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a 4768-kg roller coaster train full of riders approaches the loading dock at a speed of 17.1 m/s. It is abruptly decelerated to a speed of 2.2 m/s over a distance of 13.6m. Determine the magnitude of the restraining force that acts upon the roller coaster cars.
b. Waves can exist in liquids and solids only.
c. Waves can exist in solids and liquids only.
d. Waves can exist in solids, liquids, and gases.
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is the ONLY accurate statement.
The word "only" in the other 3 statements makes them
not accurate at all.
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A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s .If the cart has an initial speed of of 2.0 m/s and its final speed is calculated as 22m/s.
Given data is,
Time t = 5 seconds
Acceleration a = 4 m/s
Initial speed u = 2 m/s.
What is velocity?
Velocity is defined as the rate of change of object's position with some function of time.
Mathematically, Velocity can be defined by the ratio of distance and time.
Velocity = Distance/ time.
The velocity after a certain time of acceleration can be described with the formula as,
V = u + at
where, v is the final velocity,
u is the initial velocity,
a is the acceleration,
t is the time.
Substituting all the given values in the formula,
V = 2 + ( 4x5)
= 2 + 20
V = 22m/s
The final velocity of a cart rolling down can be calculated as 22 m/s.
To know more about the velocity,
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Answer: solve it with the following formula:
Vf = Vi + at
Final velocity = initial velocity + ( acceleration × time)
Explanation:
Putting the values
Vf = 2.0m/s+ 4.0m/s²× 5.0s
Vf = 2.0m/s +20.0 m/s (m/s² × s = m/s)
Vf = 22.0 m/s
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Answer:
There are two similarities between refracting telescope and compound microscope.
1. both have objective lens and eyepiece lens
2. both the lenses are convex in nature.
Explanation:
Objective lens is near the object and eyepiece is near the eye through which we can see the image.
Convex or converging lens is used to converge the rays of light coming from the object.
They both have an objective lens and an eyepiece lens.
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Answers
The statement made by the martian when he accidentally landed on Venus was that "I didn't planet (plan) it this way".
The question simply relates to a riddle. A riddle simply means a statement, phrase, or question that has a double or veiled meaning that is put forth as a puzzle to be solved by others.
It should be noted that the statement made by the martian when he accidentally landed on Venus was that "I didn't planet (plan) it this way".
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