Answer:
the refracted rays neither converge nor diverge. After refracting, the light rays are traveling parallel to each other and cannot produce an image.
Explanation:
Answer:
Approximately 
, if this gas is an ideal gas, and that the quantity of this gas stayed constant during these changes.
Explanation:
Let 
and 
denote the pressure of this gas before and after the changes.
Let 
and 
denote the volume of this gas before and after the changes.
Let 
and 
denote the temperature (in degrees Kelvins) of this gas before and after the changes.
Let 
and 
denote the quantity (number of moles of gas particles) in this gas before and after the changes.
Assume that this gas is an ideal gas. By the ideal gas law, the ratios 
and 
should both be equal to the ideal gas constant, 
.
In other words:
.
.
Combine the two equations (equate the right-hand side) to obtain:
.
Rearrange this equation for an expression for , the temperature of this gas after the changes:
.
Assume that the container of this gas was sealed, such that the quantity of this gas stayed the same during these changes. Hence: 
, 
.
![\begin{aligned} T_2 &= \frac{P_2}{P_1} \cdot \frac{V_2}{V_1} \cdot \frac{n_1}{n_2}\cdot T_1 \\[0.5em] &= \frac{1.67\; \rm atm}{1.12\; \rm atm} \times \frac{11.2\; \rm m^{3}}{15.7\; \rm m^{3}} \times 1 \times 245\; \rm K \\[0.5em] &\approx 261\; \rm K\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D%20T_2%20%26%3D%20%5Cfrac%7BP_2%7D%7BP_1%7D%20%5Ccdot%20%5Cfrac%7BV_2%7D%7BV_1%7D%20%5Ccdot%20%5Cfrac%7Bn_1%7D%7Bn_2%7D%5Ccdot%20T_1%20%5C%5C%5B0.5em%5D%20%26%3D%20%5Cfrac%7B1.67%5C%3B%20%5Crm%20atm%7D%7B1.12%5C%3B%20%5Crm%20atm%7D%20%5Ctimes%20%5Cfrac%7B11.2%5C%3B%20%5Crm%20m%5E%7B3%7D%7D%7B15.7%5C%3B%20%5Crm%20m%5E%7B3%7D%7D%20%5Ctimes%201%20%5Ctimes%20245%5C%3B%20%5Crm%20K%20%5C%5C%5B0.5em%5D%20%26%5Capprox%20261%5C%3B%20%5Crm%20K%5Cend%7Baligned%7D)
.
<h2>
Answer: decreases</h2>
Every substance, body or material has mass and volume, however the mass of different substances occupy different volumes.
This is where density 
appears as a physical characteristic property of matter that establishes a relationship between the mass 
of a body or substance and the volume 
it occupies.
So, according to this equation, the density is inversely ptoportional to the volume:
If the volume increases, the density decreases.
This is what a fish does to have buoyancy, since the density of a body is related to its buoyancy:
A body will float on another fluid if its density is lower.
<h2>This is what the fish does when it expands its air bladder, incrementing its volume, hence decreasing its density.</h2>
<span>a. The ball accelerates downward with a force of 80.5 N.
This is a rather badly worded question since the answer depends upon whether or not the impact with the gym ceiling was elastic or non-elastic. With an elastic collision, the ball will accelerate downward with it's original force plus the acceleration due to gravity. With a non-elastic collision (the energy in the ball being used to damage the ceiling of the gym), then the initial energy the ball has would be expended while causing damage to the gym ceiling and then the ball would accelerate downward solely due to the force of gravity. In either case, we need to take into consideration the force of gravity. So multiply the mass of the ball by the gravitational acceleration, giving
F = 0.25 kg * 9.8 m/s^2 = 2.45 kg*m/s^2 = 2.45 N
Since the initial force is 78.0 newtons, let's add them
78.0 N + 2.45 N = 80.45 N
and after rounding to 3 figures, gives 80.5 N
So we have a possible answer of 2.45N or 80.5N depending upon if the collision is elastic or not.
And unfortunately, both possible answers are available.
Since no mention of the ceiling being damaged is made in the question, and to be honest a 100% non-elastic collision is highly unlikely, I will assume the collision is elastic, so the answer is "a".</span>
<span>C. the slope of that objects velocity-time graph
Hope it helps!
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