The force F newtons between two magnetic poles is given by the formula
F = \displaystyle\frac{1}{500r^{2}} where r m is their distance apart.
Find the rate of change of the force when the poles are 0.2 m apart and the distance between them is increasing at a rate of 0.03 ms^-1"
\displaystyle\frac{dF}{dt} = \frac{dr}{dt}*\frac{dF}{dr}
dr/dt = 0.03 ms^-1 and df/dr = -1000r^-3.....where r = 0.2m so don't i just do for df/dr, -1000*(0.2^-3) and then multiply it by 0.03???
Answer:
to start of in math you use stuff like numbers and equations although you can use equations in science in science you use different types of technology for that.
If you are asking for the formula thing, it is
y=3x+2
I do believe that it is C because the points fall above the value of y, and I do believe that the sign given here is supposed to be shown by a solid black line, meaning that points on the graph can be shown on the line.
If you would like to know what percent of the cost of a new bicycle has Artie saved, you can calculate this using the following steps:
x% of $450 is $300
x% * 450 = 300
x/100 * 450 = 300 /*100/450
x = 300 * 100 / 450
x = 66.67%
The correct result would be 66.67%.
<span>If you would like to know what should Claire's proportion look like, you can calculate this using the following steps:
</span>
x/100 * 450 = 300 /*100
x * 450 = 300 * 100
The correct result would be A) 300 * 100 = x * 450.
