Answer:
a) 0 metres
b) From time 0 s to 10 s , the car was accelerated. Its velocity accelerated from 0m/s to 20 m/s
c) 20 m/s
Explanation:
a) <em>Formula of displacement= velocity x time</em>
time=40 s
velocity =0 m/s
∴ displacement= 0 x 40 = 0 m
Magnitude of displacement is 0 m
b) The increase in velocity shows that there has been acceleration.
c) The average velocity of the car is =
{initial velocity + final velocity}
=
=20
Therefore, the magnitude of the average velocity of the car is 20 m/s
Answer: it will move to the left
Explanation: i remeber doing this
Answer:
the magnitude of the vector is 44,40 units
Explanation:
Using the Pythagoras theorem
Answer:
h=15.27m
Explanation:
Since at maximum height the vertical velocity must be null it's better to use the formula:
We will use this formula for the vertical direction, choosing the upward direction as the positive one, so we have:
or
which for our values is:
Answer:
mole fraction of toluene 0.53
Explanation:
given data:
vapor pressure of benzene = 160 torr
vapor pressure of toluene = 50 torr
mole of benzene = 3.8 mol
mole of toluene = 5.7 mol
calculate total pressure
here total pressure = mole fraction of toluene x vapour pressure of toluene + mole fraction of benzene x vapor pressure of benzene
mole fraction of toluene 
mole fraction of Benzene 
= 94 torr
we have mole fraction of toluene in vapor phase =\frac{50}{94} =
= 0.53 (ans)
