Answer:
f=1/t is the equation of frqency
Answer:
46.9 C
Explanation:
The heat released by the gold bar is equal to the heat absorbed by the water:
where:
is the mass of the gold bar
is the specific heat of gold
is the initial temperature of the gold bar
is the mass of the water
is the specific heat of water
is the initial temperature of the water
is the final temperature of both gold and water at equilibrium
We can re-arrange the formula and solve for T_f, so we find:
<u>Answers
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1) B. longitudinal.
2) B. air is cooler than the ground.
<u>Explanation
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Q1
There are two categories of a wave. That is transverse and longitudinal waves. Transverse waves forms crests and troughs while longitudinal forms compressions and rarefaction as they travel. Rarefactions are regions where the wavelengths are longer than other regions.
Q2
As the ray of light moves from an optically less dense to a more dense region it bends towards the normal.
If the sound is bending away from the earth's surface, then the ground must be warmer than the air. As the sound travels it moves from optically dense medium to a less dense medium. For this reason it bends away from the normal. This can only happen when, B. air is cooler than the ground.