Question 11 of 15
2 answers:
You might be interested in
Hope this provides some answers
Answer:
The mass of silver that will occupy a volume of 87.75 mL is 920.5 grams.
Explanation:
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
So the density of silver is 10.49 g / mL indicates that 10.49 g occupies a volume of 1 mL. Then a rule of three can be applied in the following way: if in 1 mL a mass of 10.49 g is occupied, in 87.75 mL how much mass will it occupy?
mass= 920.5 g
<u><em> The mass of silver that will occupy a volume of 87.75 mL is 920.5 grams.</em></u>
Answer:
0.245
Explanation:
When the block is released, the initial elastic potential energy stored in the spring is entirely converted into kinetic energy of the block.
Therefore, we can calculate the initial speed of the block:
where the term on the left is the potential energy and where the term on the right is the kinetic energy, and where
k = 4500 N/m is the spring constant
x = 8.0 cm = 0.08 m is the compression of the spring
m = 3.0 kg is the mass of the block
v is the initial velocity
Solving for v,
Then, after the block is released, all its kinetic energy is converted into thermal energy as the block slows down, due to friction. Therefore, the work done by friction is equal to the initial kinetic energy of the block.
The force of friction is
where
is the coefficient of friction
is the acceleration of gravity
So the work done by it is (in magnitude)
where
d = 2.0 m is the distance covered
Therefore,
And solving for ,