Here’s the picture of the problem
1 answer:
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The frictional force is 218.6 N
Explanation:
The block in the problem is at rest along the inclined surface: this means that the net force acting along the direction parallel to the incline must be zero.
There are two forces acting along this direction:
- The component of the weight parallel to the incline, downward along the plane, of magnitude
where
m = 46 kg is the mass
is the acceleration of gravity
is the angle of the incline
- The (static) frictional force, acting upward, of magnitude
Since the block is in equilibrium, we can write
And substituting, we find the force of friction:
Learn more about frictional force along an inclined plane:
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Answer:
Approximately of steam at
(assuming that the boiling point of water in this experiment is
.)
Explanation:
Latent heat of condensation/evaporation of water: .
Both mass values in this question are given in grams. Hence, convert the specific heat values from this question to .
Specific heat of water: .
Specific heat of copper: .
The temperature of this calorimeter and the of water that it initially contains increased from
to
. Calculate the amount of energy that would be absorbed:
.
.
Hence, it would take an extra of energy to increase the temperature of the calorimeter and the
of water that it initially contains from
to
.
Assume that it would take grams of steam at
ensure that the equilibrium temperature of the system is
.
In other words, of steam at
would need to release
as it condenses (releases latent heat) and cools down to
.
Latent heat of condensation from of steam:
.
Energy released when that of water from the steam cools down from
to
:
.
These two parts of energy should add up to . That would be exactly what it would take to raise the temperature of the calorimeter and the water that it initially contains from
to
.
.
Solve for :
.
Hence, it would take approximately of steam at
for the equilibrium temperature of the system to be
.