Answer:
The shorter train has a length of 600m
Explanation:
The equation of motion of the first train can be written as:
(1)
v' = 108km/h = 30m/s
Furthermore, you can write the equation of motion of the second train as:
= xo + vt (2)
v = 36km/h = 10m/s
where you have taken the initial position as measured from the front of the first train to the front of the second one. l is the length of the second train and 200 the separation of it respect to the first train.
For t = 40 both trains have the same position, that is, x=x'. Then, you equal equations (1) and (2), replace t=40, and solve the equation for l:
Hence, the first train has a length of 600 m
The train behind, or the second train, has twice the length of the first train:
The shorter train has a length of 600m
Answer:
change the
Explanation:
P = W/time
W = F*d
You have control over how fast you go up the stairs.
You also have control over how far up the stairs you go.
Therefore the answer is
If you don't like distance as an answer, you can carry something up the stairs -- anything that increases F will do.
Answer:
Psychiatrists are medical doctors, psychologists are not. Psychiatrists prescribe medication, psychologists can't. Psychiatrists diagnose illness, manage treatment and provide a range of therapies for complex and serious mental illness. Psychologists focus on providing psychotherapy (talk therapy) to help patients.
Explanation:
A) 1153 N/m
We can find the spring constant by using Hooke's law:
where
F is the force applied to the spring
k is the spring constant
x is the displacement of the spring
In this problem, a fish of mass m = 4.0 kg is hanging on the spring, so the force applied is the weight of the fish:
and the displacement of the spring is:
so, the spring constant is
B) 16.8 cm
In this case, a fish of mass
m = 8.0 kg
is hanging on the spring. Therefore, the force applied to the spring is
So we can find the displacement of the spring:
And since the equilibrium length of the spring is
the new length of the spring will be
HEY DEAR..
<em>AS</em><em> </em><em>an</em><em> </em><em>astronauts</em><em> </em><em>in</em><em> </em><em>Wightless</em><em> </em><em>orbit</em><em> </em><em>near</em><em> </em><em>his</em><em> </em><em>spacecraft</em><em> </em><em>and</em><em> </em><em>in</em><em> </em><em>this</em><em> </em><em>interplanetary</em><em> </em><em>space</em><em>,</em><em> </em><em>the</em><em> </em><em>force</em><em> </em><em>of</em><em> </em><em>gravity</em><em> </em><em>is</em><em> </em><em>zero</em><em>,</em><em> </em><em>so</em><em> </em><em>the</em><em> </em><em>astronauts</em><em> </em><em>has</em><em> </em><em>no</em><em> </em><em>weight</em><em>. </em><em> </em><em>he</em><em> </em><em>is</em><em> </em><em>weightless</em><em>. </em><em> </em><em>Under</em><em> </em><em>this</em><em> </em><em>conditions</em><em> </em><em>of</em><em> </em><em>weightless</em><em> </em><em>,</em><em> </em><em>I</em><em> </em><em>prefer</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>astronauts</em><em> </em><em>to</em><em> </em><em>use</em><em> </em><em>small</em><em> </em><em>jets</em><em> </em><em>of</em><em> </em><em>gas</em><em> </em><em>to</em><em> </em><em>manoeuvre</em><em> </em><em>his</em><em> </em><em>move</em><em>.</em>
<em>:</em><em>)</em><em>hope</em><em> </em><em>its</em><em> </em><em>helpfull</em>