Answer:
Get many people interested in doing it and make many people think that this is one of the best sports.
Explanation:
Answer: 9/4n
Explanation:
Let's take T to represent tank
When n litres of fuel was added to tank that was 1/3 full = n + 1/3T
The tank was 7/9T
n+1/3T = 7/9T
n =7/9T - 1/3T
n = 4/9
If a full tank is taken to be 1 = 9/9
Hence, we will have 1 = x × n
1 = x × 4/9
x = 9/4
Hence 9/4 of n = 9/4n
Answer:
Explanation:
The loss of gravitational potential energy must be equal to the gain of kinetic energy since there are no other interactions at play (no friction, etc).
We know that the change of potential energy will be written as , where <em>h</em> is the difference between the different heights.
We know that the change of kinetic energy will be written as , where <em>v</em> is the final velocity and we have assumed it departs from rest.
We then have:
We transform km/h to m/s by multiplying by the conversion factors (which are equal to 1, so don't alter the result):
So for our values we have:
to three significant figures.
Answer:
The average emf induced in the loop is 0.25 V
Explanation:
Given;
area of loop, A = 0.20 m²
strength of magnetic field, B = 50 mT
time, t = 40 ms
where;
Φ is magnetic flux, this is maximum when the plane of the loop is parallel to the magnetic field.
Φ = BA
induced emf = BA / t
induced emf = (50 mT x 0.20 m² ) / (40 ms)
induced emf = 0.25 V
Therefore, the average emf induced in the loop is 0.25 V