Answer:
The final velocity of the vehicles will be -75km per hour (leftwards).
Explanation:
Let us call 
, 
mass and velocity of the truck , 
mass and velocity of the car, and 
the final velocity of the vehicles.
The law of conservation of momentum states that
solving for we get:
putting in numerical values
(<em>the negative sign indicates that the vehicles are moving in the leftward direction)</em>
or -75.8 km per hour.<em> </em>
Answer:
volume of the gas expands to 8.74 Litres
Explanation:
The amount of work done by the gas is given by;
W = P•ΔV
Where;
W = work done by gas
P = Pressure
ΔV = change in volume i.e V_f - V_i
Where V_f is final volume and V_i is initial volume
Thus;
W = P(V_f - V_i)
We are given;
W = 927J
V_i = 42.5 cm³ = 42.5 x 10^(-6) m³
P = 1.05 atm = 106391.25 N/m²
Thus;
925 = 106391.25(V_f - (42.5 x 10^(-6))
925/106391.25 = V_f - (42.5 x 10^(-6))
0.00869432402 = V_f - (42.5 x 10^(-6))
V_f = 0.00869432402 + (42.5 x 10^(-6)))
V_f = 0.00874 m³
Final volume = 0.00874 m³
Converting to Litres, gives;
V_f = 0.00874 x 1000 = 8.74 Litres
I'm not sure, but I'm pretty sure it depends.
Answer:
B.6
Explanation:
speed = distance / time
= 75m / 12s
= 6.25 m/s
The closest answer is b. 6 m/s
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