A simple way to get the dimensions is just to rearrange the equation.
<span>So in a.) (i'm going to assume t2 is t squared) </span>
<span>rearrange: </span>
<span>x = Bt2 ----> B= x/t2 </span>
<span>Now you are told that x is displacement (L) and t is time (T) so sub these in. </span>
<span>B= L/T2 Therefore the dimensions are L/T2. </span>
<span>In b.) following the same steps: </span>
<span>x = A sin(2πft) ----> A = x/sin(2πft) </span>
<span>The hint tells you that sin(2πft) is dimensionless so you can disregard that part. </span>
<span>A = x </span>
<span>A=L</span>
Answer:
1. 2,100 sec
2. 2 min and 43 sec
3. 1,470 min
4. 3 weeks, 1 day, 12 hours
5. 60 months
When it's negative the bigger number is smaller for example -7 is less than -2 or -2 is greater than -7. so they r wrong.
I think the value of x will be 6.
2x+2x+2x=12
6x=12
x=6
2(6) - 13
12 - 13