Actually, No. That operation doesn't give you the speed, and that statement is false.
One clue is the units. If you multiply time by distance, you'd get an answer with units of hour-miles or second-meters. These are absurd units, with no physical significance.
Speed = (distance covered) <u>DIVIDED BY</u> (time to cover the distance)
When you divide distance by time, you get an answer with units like "miles per hour" or "meters per second". Without going into a long-winded discussion, I can't PROVE to you that this is actually the correct speed, but these units sure do smell a lot better.
Answer: question one: i cannot tell Question 2: waxing crescent Question 3: waxing gibbous Question 4: B
Explanation
Clear question is;
An ideal gas is enclosed in a piston-cylinder apparatus with the piston being freely movable. Given that ΔE is positive and ΔH is negative following a process,
pick one
A) the system absorbs heat and expands during the process.
B) the system absorbs heat and contracts during the process.
C) the system loses heat and expands during the process.
D) the system loses heat and contracts during the process.
E) the system loses heat but neither expands nor contracts during the process.
Answer:
Option A is correct.
Explanation:
In thermodynamics, when the change in energy which is ΔE of a system is positive, it means that the system is undergoing an endothermic process. An endothermic process is simply one where heat is absorbed from the surroundings
Now, when change in enthalpy which is ΔH is negative, it means that it's an exothermic reaction. Exothermic means it releases heat to the surroundings. This means work is positive because the system does work on the surroundings. Thus it will expand.
So the correct answer is;
heat is absorbed from the surroundings and will expand during the process.
Answer:
a. Velocity
Explanation:
The slope of the tangent line on a position-time graph is the instantaneous velocity.
What are the answer choices? usually under the age of 18 , you would go to only a pediatric doctor. unless you’re a woman and you go to a obgyn.