Answer:
0.767m
Explanation:
We are given that the time interval between each droplet is equal.
We are also given that the fourth drop is just dripping from the shower when the first hits the floor.
If they fall at the same time interval and we know that the distance between the shower head and floor are the same, they must therefore fall at the same velocity.
The distance between each drop has to be the same given that they fall at equal time intervals.
Let this distance be x.
We can then partition the entire height of the system into three parts (as shown in the diagram).
Hence, we can say that:
x + x + x = 2.3m
3x = 2.3m
=> x = 2.3/3 = 0.767m
Therefore, at the time the first drop hits the floor, the third drop is only 0.767 m below the shower head.
For this problem, let's use the approach of dimensional analysis. This technique is done by cancelling out like units that appear both on the numerator and the denominator side. As a result, this technique will let you know that your final answer conforms to what parameter is asked. In this case, the final answer should be in kJ. We use the conversion: 1000 cal = 4.184 kJ The solution is as follows:
<span>6.95×10</span>⁵<span> cal * 4.184 kJ/1000 cal = 2,907.88 kJ</span>
Answer:
B is correct. Electrons are added to the rod.
Explanation:
Because the fur lose electrons to the rode and because positively charged while the rod because negative
The bigger the starting force, the further the distance moved by the car?
Answer:
Part 1)
Part 2)
Part 3)
Part 4)
Part 5)
Explanation:
Part a)
Initial angular momentum of the merry go round is given as
here we know that
now we have
Part b)
Angular momentum of the person is given as
so we have
R = 1.99 m
so we have
Part 3)
Angular momentum of the person is always constant with respect to the axis of disc
so it is given as
Part 4)
By angular momentum conservation of the system we will have
Part 5)
Force required to hold the person is centripetal force which act towards the center
so we will have
