Answer:
B
Mass of cylinder + mass of water - mass of cylinder = mass of water
The equivalent resistance of the three resistors when connected in parallel is:
![\frac{1}{R_{eq}} = \frac{1}{R_1}+ \frac{1}{R_2}+ \frac{1}{R_3}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7BR_%7Beq%7D%7D%20%3D%20%5Cfrac%7B1%7D%7BR_1%7D%2B%20%5Cfrac%7B1%7D%7BR_2%7D%2B%20%5Cfrac%7B1%7D%7BR_3%7D%20%20%20%20)
Since the three resistors in this problem are identical, we can call R their resistance, and we can rewrite the previous equation as
![\frac{1}{R_{eq}} = \frac{1}{R}+ \frac{1}{R}+ \frac{1}{R}= \frac{3}{R}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7BR_%7Beq%7D%7D%20%3D%20%5Cfrac%7B1%7D%7BR%7D%2B%20%5Cfrac%7B1%7D%7BR%7D%2B%20%5Cfrac%7B1%7D%7BR%7D%3D%20%5Cfrac%7B3%7D%7BR%7D%20%20%20%20%20)
And since we know the value of the equivalent resistance,
![R_{eq}=85 \Omega](https://tex.z-dn.net/?f=R_%7Beq%7D%3D85%20%5COmega)
, we can find the value of R:
![R=3 R_{eq} = 3 \cdot 85 \Omega=255 \Omega](https://tex.z-dn.net/?f=R%3D3%20R_%7Beq%7D%20%3D%203%20%5Ccdot%2085%20%5COmega%3D255%20%5COmega)
Now the problem asks us what is the equivalent resistance of the three resistors when they are connected in series. In this case, the equivalent resistance is just the sum of the three resistances, so
Answer:
○ 0 ![\checkmark](https://tex.z-dn.net/?f=%5Ccheckmark)
Explanation:
Even if the athelete runs four laps of a 400 m track, its displacement will be 0 because the displacement is the shortest distance from its to final position. And, here the final and initial position is same since he comes to its initial position after covering certain distance. So, displacement is 0.
Answer:
By 16.7% or 0.167 IPM
Explanation:
Substracting the final IPM (6.088) to the initial IPM (5.921) gives us the net difference, which is how much did it increase in IPM. Multiplying this number by 100 gives us the percentual increase in the feed rate.
Answer:
Acceleration is the change in velocity over the change in time = Δv/Δt. To do these problems, you need to find out how much the speed changed and over what period of time it changed.
Snail 1 changes from 4 cm/min to 7 cm/min in 3 minutes. Subtract the starting velocity (4 cm/min) from the ending velocity (7 cm/min) then divide by the time (3 min):
Snail 1 = (7 cm/min. - 4 cm/min)/(3 minutes) = ? (remember to put down the units)
Snail 2 changed from 7 cm/min. down to 1 cm/min. in 3 minutes
Snail 2 = (1 cm/min. - 7 cm/min.)/(3 min.) = ? (note that the acceleration is negative when you slow down)
I hope this helps you