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.
Potential energy due to gravity = Ep = mgh [symbols have their usual meaning
Evidently, HALVING the mass will make Ep , HALF its previous value. So, It will be halved.
Answer:
1234285.7 m or 1234.3 km
Explanation:
Let the distance be 
, the time taken by P waves be 
and the time taken by the S waves be 
.
For the P waves,
For the S waves,
Equating the ,
Divide both sides of the equation by 500 to reduce the terms.
Since S waves arrive 2 minutes (= 120 seconds) after P waves,
Substitute this in the equation of the distance.
Substitute this in the equation for involving .
Answer:
because it causes echoes walls are good reflectors of sound
Explanation:
pls mark brainliest ;)
Answer:
Which of the following correctly describes a solid? Explanation: A solid is defined as having a definite shape and definite volume. A liquid is defined as having a definite volume, but not a definite shape.
