If a ball is thrown straight up into the air with an initial velocity of 65 ft/s, its height in feet after t seconds is given by f(t)=65t−16t2 find the average velocity for the time period beginning when t=2 and lasting (i) 0.5 seconds 61.5 (ii) 0.1 seconds 65.74 (iii) 0.01 seconds 65.98 (iii) 0.001 seconds 65.99 based on the above results, guess what the instantaneous velocity of the ball is when t=2.

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Place me with this question is my last question

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?