Frank stands still while throwing a dart toward a target with a speed of 25 m/s.

What is the speed of the dart observed by Frank compared to the speed observed by a stationary observer?

The speed is 25 m/s for both people.

The speed is greater than 25 m/s for Frank only.

The speed is greater than 25 m/s for the observer only.

The speed is less than 25 m/s for both people.

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

What are two examples of phase changes that skip a phase during transition?