the independent variables are the different
laudry detergent
the dependent variable is color of the cloth
after washing
the control variables are the amount of water
added and by washing one cloth b just water
<span>hypothesis: the cloth washed with laundry
detergent is cleaner than the cloth that is just washed by water. </span>
This is a trick question. Since the planets are in orbit all the time the distance changes, which is because some planets orbit faster than others. I hope this helped at least a little bit.
Answer:
v = 8[m/s]
Explanation:
In this case, the work that is exerted on the cart is the kinetic energy that allows the movement, so we can use the following equation of kinetic energy.
Now replacing:
![128=0.5*4*v^{2} \\v=\sqrt{64} \\v=8[m/s]](https://tex.z-dn.net/?f=128%3D0.5%2A4%2Av%5E%7B2%7D%20%5C%5Cv%3D%5Csqrt%7B64%7D%20%5C%5Cv%3D8%5Bm%2Fs%5D)
Answer:
B. The force would be the same in both cases.
Explanation:
According to Newton's 3rd law where impulse was equated to the momentum formula.
F × t = M × V
where,
Force = F
V = velocity
Since, Impulse is force multiplied by time, whereas the time of contact is the same for both, therefore the impulse is the same in magnitude for the two trucks.
Case 1: Hitting the other car
Case 2: Hitting the brick wall
In Case 1, both the cars are identical and have same velocity whereas in the Case 2, the wall is stationary.
The case of hitting the brick wall have the same impact force as hitting the other car, because they have the same change in momentum.
Therefore, The force would be the same in both cases.
