Answer:
Series circuit approximation = R1 >> R2 then R2 ≈ 0
Parallel circuit approximation = R1 << R2 then R2 ≈ 0
Explanation:
in a series circuit, if there is a large difference between two resistors then we can omit the resistor which has low resistance because the higher value resistor dominates.
R1 >> R2 then R2 ≈ 0
in a parallel circuit, if there is a large difference between two resistors then we can omit the resistor which has high resistance because the lower value resistor dominates.
R1 << R2 then R2 ≈ 0
F = ma
F = force
m = mass
a = acceleration
4.2 m/s = a
70 kg = m
F = ?
F = 4.2*70
F = 294 Newtons
Answer would then be : Force = 294 N
Answer:
With a tape measure.
Explanation:
We can use a big tape measure, this tape is in the market and we can use the one with the proper length that lets us measure different sections of the total length of the pool.
Answer:
![P_2=222.22kPa](https://tex.z-dn.net/?f=P_2%3D222.22kPa)
Explanation: By using Gas Law, the new pressure can be calculated as follows:
Gas law states:
![(P_1V_1=P_2V_2)\Rightarrow(1)](https://tex.z-dn.net/?f=%28P_1V_1%3DP_2V_2%29%5CRightarrow%281%29)
Using (1), and Identifying the knowns and unknowns, and plugging in (1) we get the following results:
![\begin{gathered} V_1=10cm^3=1\cdot10^{-5}m^3 \\ P_1=100\text{kPa}=100000Pa \\ V_2=(0.45)\cdot V_1=(0.45)\cdot(1\cdot10^{-5}m^3)=4.5\cdot10^{-6}m^3 \\ V_2=4.5\cdot10^{-6}m^3 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20V_1%3D10cm%5E3%3D1%5Ccdot10%5E%7B-5%7Dm%5E3%20%5C%5C%20P_1%3D100%5Ctext%7BkPa%7D%3D100000Pa%20%5C%5C%20V_2%3D%280.45%29%5Ccdot%20V_1%3D%280.45%29%5Ccdot%281%5Ccdot10%5E%7B-5%7Dm%5E3%29%3D4.5%5Ccdot10%5E%7B-6%7Dm%5E3%20%5C%5C%20V_2%3D4.5%5Ccdot10%5E%7B-6%7Dm%5E3%20%5Cend%7Bgathered%7D)
Finally, the New pressure is calculated as follows:
Answer:
The time taken to complete her run is 1.9 hr.
Explanation:
Speed is a scalar quantity and it is defined as the ratio of distance covered to the time taken to cover that distance. As distance is also a scalar quantity, so the directions given in the problem can be ignored. Thus, the distance covered by the jogger is the sum of kilometers given in problem.
Distance covered = 6+5+4 = 15 km
And the speed is given as 8 km/hr.
So the time taken will be ratio of distance to speed.
So the jogger will take 1.9 hr to complete her run.