1).B
2.)C
i think the reason was because of the pangea theory that continents where once one big continent and over time it began to split
the formula for velocity is:
v= distance/time
distance= 80m
time=2 seconds
v=80/2
v=40ms-1
Answer:
When there is an increase in the frequency of sound waves, the wavelength decreases.
Explanation:
Given data,
The frequency of the whale changes from 200 Hz to 300 Hz
The formula for frequency and wavelength is,
λ = v/f
Where v is the velocity of the sound waves in water (1531 m/s)
The wavelength at 200 Hz is,
λ = 1531/200
= 7.655 m
The wavelength at 300 Hz is,
λ = 1531/300
= 5.1 m
Hence, when there is an increase in the frequency of sound waves, the wavelength decreases.
Answer: d. all of the above
Explanation:
A wildfire can be either naturally occurring or induced by humans for their own benefit. Is likely to exert a negative impact on the wildlife. A fire is likely to spread quickly to the entire canopy cover of the forest trees. This will destroy the availability of food and other resources. Many birds and animals will loose their habitat or shelter. The destruction of the floral species will cause migration of the faunal species to other locations. Therefore, the biodiversity of the region will be lossed.
SOLUTION:
Total amount of fruit = Total amount of apples + Total amount of pears + Total amount of oranges
Total amount of fruit = 15 / 4 + 29 / 4 + 81 / 8
Total amount of fruit = 30 / 8 + 58 / 8 + 81 / 8
Total amount of fruit = 169 / 8
Total amount of fruit = 21.125 kg
ANSWER:
Therefore, the chief bought 21.125 kg of fruit all together.
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