Answer:
40.34 s
Explanation:
Given,
Velocity (v) = 5.33 m/s
Distance (s) = 215 m
Time (t) = ?
We know that,
Speed (v) = distance (s)/time (t)
⇒ time(t) = distance (s)/speed (v)
= 215/5.33 = 40.34 sec
∴ time(t) = 40.34 sec.
Answer:
20 m away from you
Explanation:
After 4 seconds, dog will have moved 40 metres since 10×4=40
The dog will be 60-40 metres away from you. Which gives our answer of 20 m
Answer:
Explanation:
This is an excellent question to get an answer for. It teaches you much about the nature of physics.
The answer is no.
The distance will be quite different. The time might be different in getting to the distance. But the acceleration will be the same in either case.
How do you know? Look at one of the formulas, say
d = vi * t + 1/2*a * t^2
What does vi do? vi will alter both t and d. if vi = 0 then both d and/or t will be found. But what will "a" do? Is there anything else acting in the up or down line of action? You should answer no.
If vi is not zero, t will be less and d will take less time to get where it is going.
The water runs out the holler and through the creek an then the molecules sedimentate
Let's think of an example, water boiling to form steam.
When the water boils, it obviously does not have the same shape, and liquids and gases don't have a definite shape, so shape is not the answer.
To force a phase change, water needs energy in the form of heat, so temperature is also not the answer.
The volume is also changed, and gases take up more space than liquids, so volume is also not the answer.
So, after ruling the other three out, the one we're left with is mass, and that is the answer: mass remains constant during a phase change
Don't hesitate to ask further questions!
Hope I helped!! xx