Answer:
Be serious or else CEO of brainly will kick you out
Answer: the frequency observed will be 1269.45hz
Explanation: according to the doppler effect,
Apparent frequency f' = (c/(c+u))*f
f = real freq of sound of moving sound source
c = speed of sound in air
u = speed of moving sound source
f' = (343/(343+33.6))*1395
f' = 1269.45hz
Answer:
1.The calorie was originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water 1° Celsius. Since 1925 this calorie has been defined in terms of the joule, the definition since 1948 being that one calorie is equal to approximately 4.2 joules.
2.Boiling water at 100 degrees Celsius: 540 calories are needed to turn 1 gram (at 100 degrees Celsius) of water to steam.
<h2>Arch Carries the thrust of Weight - Option D</h2>
An arch carries the thrust of weight to its sides. With a post-and-lintel, the horizontal part of the structure supports all the weight above it. The reason is that the post and lintel is a system of construction. In this the powerful parallel components are kept up by powerful upward components that has large cavities between them.
Therefore, an arch carries the thrust of weight to its sides for balancing purposes.
