Answer:
The pressure is constant, and it is P = 150kpa.
the specific volumes are:
initial = 0.062 m^3/kg
final = 0.027 m^3/kg.
Then, the specific work can be written as:
The fact that the work is negative, means that we need to apply work to the air in order to compress it.
Now, to write it in more common units we have that:
1 kPa*m^3 = 1000J.
-5.25 kPa*m^3/kg = -5250 J/kg.
Define displacement and I'll help you
Answer:
Explanation:
Let the four resistances of th wheat stone bridge is
P, Q, R and S and the value of each is 350 ohm.
Here, P and Q are in series.
R' = P + Q = 350 + 350 = 700 ohm
Then R and S are in series
R' = R + S = 350 + 350 = 700 ohm
Now R' and R'' are in parallel.
So, the equivalent resistance is
Req = R' x R'' / ( R' + R'')
Req = 700 / 2 = 350 ohm
Thus, the reading of ohmmeter is 350 ohm.
a). for velocity, you must have a number, a unit, and a direction.
Yes. This one isn't bad. The 'number' and the 'unit' are the speed.
b). the si units for velocity are miles per hour.
No. That's silly.
'miles' is not an SI unit, and 'miles per hour'
is only a speed, not a velocity.
c). the symbol for velocity is .
You can use any symbol you want for velocity, as long as
you make its meaning very clear, so that everybody knows
what symbol you're using for velocity.
But this choice-c is still wrong, because either it's incomplete,
or else it's using 'space' for velocity, which is a very poor symbol.
d). to calculate velocity, divide the displacement by time.
Yes, that's OK, but you have to remember that the displacement
has a direction, and so does the velocity.
Answer:
the acceleration of the car is -4.9m/s2.
the direction is opposite to the actual direction, since the acceleration is negative.
