While waiting for the CABS bus on the way home from physics class, your friend looks up at the traffic signal and says, "I wonder how big the traffic signal is, it can't be more than half a meter tall?" Having only a rock, the timer on your phone (no service), your knowledge of kinematics, and all the time in the world, you two decide to figure out its vertical size L. First you throw the rock vertically upwards so that the maximum height of the rock just matches the height of the bottom of the traffic signal at the peak of the rock's trajectory. Your friend times that the rock is in the air for a total of tpottom = 2.1 seconds from when you release it to when you catch it (averaging over several trials). Next you throw the rock vertically upwards so that it matches the height at the top of the traffic signal at the peak of its trajectory, and measure it to take trop over several trials). What is the approximate vertical size L of the traffic signal? 2.3 seconds (averaging

The answer is 30 but I don't know how it arrived at that answer! Please explain

(Please refer to Fig. 1) W = FAx (Equation 1) F = qE (Equation 2) APEelec = -W (Equation 3) Substituting Eq. 1 in Eq. 3, APE elec Then subs. Eq. 2 in Eq. 4, 4. What does q means in the derived equation? = -FAx (Equation 4) APE etec = -qEAx (Eq. 2.1) Which is what we need to derive.

For the remaining questions, you need to use Figure 1.4 to obtain the necessary orders of magnitude of lengths, masses, and times.About how many floating-point operations can a supercomputer perform each year?

he equation is derived fro Vf

I keep on getting the wrong equation for this set up how do I do it?

Modern PhysicsDerive the equation above to form the answer highlighted. Show the solution. Derive the equation ∆t = 2/cv √(∆tnot/2)² + (V∆t/2)² and it should come up with that highlighted answer below. So it means that you need to show the process of the solution on how that equation comes up with that highlighted answer.

can anyone step by step explain why answer is 0.2？

How do I solve this problem properly in a step by step solution?

Enplain the equation Fz-VU.