Answer:
Smallest drop: Water
Largest drop: Dirt
Explanation:
The heat needed to change the temperature of a sample is:
(1)
with Q the heat (added(+) or removed(-)), c specific heat, m the mass and 
the change in temperature of the sample. So, if we solve (1) for
Sample A:
Sample B:
Sample C:
Note that the numbers 16744, 5400, 9450 are in the denominator of the expression 
that gives the drop on temperature. so, if Q is the same for the three samples the smallest denominator gives the largest drop and vice versa.
So, the smallest drop is Sample A and the largest is Sample C.
(Important: The minus sign of implies the temperature is dropping)
Answer:
The current when the filament at room temperature is 11.84 A.
Explanation:
Given that,
Thermal coefficient of resistivity 
Initial temperature = 293 K
Voltage = 140 Volt
Final temperature = 2900 K
Current = 0.95 A
Suppose we find the numerical value of the current when the filament is at room temperature
So, We use the equation of resistance of a material changes with temperature
....(I)
Using ohm's law for value of resistance
Put the value of resistance in the equation (I)
Put the value into the formula
Hence, The current when the filament at room temperature is 11.84 A.
Answer:
An example of positive velocity is throwing a ball upwards
An example of downward vertical velocity is when an object is dropped, for example a ball dropped from a height
Explanation:
In a vertical movement the acceleration is always downwards, therefore negative since it is created by the attraction of the Earth on the body.
An example of positive velocity is throwing a ball upwards
An example of downward vertical velocity is when an object is dropped, for example a ball dropped from a height
Answer:
MRI
Explanation:
Magnetic Resonance Imaging, furnishes the most detailed picture of brain structure. MRI produces the most point by point picture of the cerebrum. MRI examines by using attractive fields and radio waves to create PC produced pictures that recognize the structures inside the mind. It gives the most point by point and a detailed image of the brain structure.
It is both.
<span>It is a physical change because when you chew your food you break it up into smaller pieces and are therefore changing its size and shape which are physical changes. </span>
<span>However, digestion begins in the mouth. When we chew our food, it mixes with enzymes from our saliva and begins to break down the food. Digestion is a chemical change.</span>
