Answer:
Option C = Time
Explanation:
Speed:
''It is the distance travel in per unit time". It tells the capacity of moving object how fast it is moving. It is scalar quantity and can be explain just in term of magnitude. It does not require direction. For example we can say that someone is moving fast or moving slow. We are telling the magnitude of speed either its high or slow. If the object is not moving then its speed will be zero.
Formula:
r = d / t
r = speed (it can also be represented by v)
t = time taken to cover the distance
d = distance
Unit:
The system international unit of speed is m/s. It can also be given in Km/h
Example:
A car cover the 300 Km distance in a four hour. what is the speed of car?
Given data:
Distance = 300 km
Time = 4 hr
speed = ?
v = d / t
v = 300 km / 4 hr
v = 75 km/ hr
The speed of car is 75 km/hr.
Answer:
A Calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.
Explanation:
Ex- when an exothermic reaction ( accompanied by or requiring absorption of heat)occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution increasing its temperature.
- When an endothermic reaction (Heat evolving reaction) occurs, the heat required is absorbed from the thermal energy of the solution, decreasing its temperature.
A burning piece of coal which is releasing heat due to its combustion and is transferred to water.
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Methane is the primary component of natural gas and is used to produce heat and electricity around the world.
The answer is "A. Volcanic Neck"