Answer:
Approximately assuming no heat exchange between the mixture and the surroundings.
Explanation:
Consider an object of specific heat capacity and mass . Increasing the temperature of this object by would require .
Look up the specific heat of water: .
It is given that the mass of the water in this mixture is .
Temperature change of the water: .
Thus, the water in this mixture would have absorbed :
.
Thus, the energy that water absorbed was: .
Assuming that there was no heat exchange between the mixture and its surroundings. The energy that the water in this mixture absorbed, , would be the opposite of the energy that the metal in this mixture released.
Thus: (negative because the metal in this mixture released energy rather than absorbing energy.)
Mass of the metal in this mixture: .
Temperature change of the metal in this mixture: .
Rearrange the equation to obtain an expression for the specific heat capacity: . The (average) specific heat capacity of the metal pieces in this mixture would be:
.
Answer:
Towards left
Explanation:
Applying Fleming Right hand rule in which the middle finger denotes downward magnetic field. Thumb pointing towards you is the direction of motion of electron beam.The direction of force on the electron indicated by the index finger is towards left. Hence the electron beam is deflected towards left.
Dalton Was the first one to attempt a publishing list of relative atomic masses.
Answer:
a)27.3N
b)150.78N
Explanation:
Having in mind the conservation of energy, as the monkey goes up (gaining potential gravitational energy) the kinetic energy must be reduced, so reducing the velocity of the monkey. So the maximum velocity will be at this lower point with a velocity of 1.36m/s
From this velocity and the radius we can calculate the angular velocity for the monkey center of mass:
with this we can calculate the centripetal force magnitude:
On the mokey center of mass we have two opposite forces acting, the tension of the arm and the weight, in order for the monkey to continue swinging the resolt of this two forces must be equal to the centripetal force:
<span>The molecules in the sugar move from an area of higher concentration to an area of lower concentration in the water.</span>