C. Forces have mass and take up space
Explanation:
Given that,
Two resistors of resistance 6 ohm and 3 ohm are connected in series and then in parallel.
For series combination,
![R_{eq}=R_1+R_2](https://tex.z-dn.net/?f=R_%7Beq%7D%3DR_1%2BR_2)
For parallel combination,
![\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7BR_%7Beq%7D%7D%3D%5Cdfrac%7B1%7D%7BR_1%7D%2B%5Cdfrac%7B1%7D%7BR_2%7D)
When 6 ohm and 3 ohm are in series,
![R_s=6+3\\\\R_s=9\ \Omega](https://tex.z-dn.net/?f=R_s%3D6%2B3%5C%5C%5C%5CR_s%3D9%5C%20%5COmega)
When 6 ohm and 3 ohm are in paralle,
![\dfrac{1}{R_p}=\dfrac{1}{6}+\dfrac{1}{3}\\\\R_p=2\ \Omega](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7BR_p%7D%3D%5Cdfrac%7B1%7D%7B6%7D%2B%5Cdfrac%7B1%7D%7B3%7D%5C%5C%5C%5CR_p%3D2%5C%20%5COmega)
So, the equivalent resistance in series combination is 9 ohms and in parallel combination it is 2 ohms.
Answer:
0.7 hours
Explanation:
From the way back, we can calculate the distance between Irina's work and Irina's home. In fact, we know that the car takes 0.4 hourse traveling at 27 mph, so the distance covered should be
![d=vt=(27 mph)(0.4 h)=10.8 mi](https://tex.z-dn.net/?f=d%3Dvt%3D%2827%20mph%29%280.4%20h%29%3D10.8%20mi)
When Irina rides to work with her bike, she travels at a speed of 16 mph. So we can find the time she takes by dividing the total distance (10.8 miles) by her speed:
![t=\frac{d}{v}=\frac{10.8 mi}{16 mph}=0.7 h](https://tex.z-dn.net/?f=t%3D%5Cfrac%7Bd%7D%7Bv%7D%3D%5Cfrac%7B10.8%20mi%7D%7B16%20mph%7D%3D0.7%20h)
Answer:
The Total Mechanical Energy
As already mentioned, the mechanical energy of an object can be the result of its motion (i.e., kinetic energy) and/or the result of its stored energy of position (i.e., potential energy). The total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy.
Explanation: