Here are the positions at three different times for a bee in flight(a bee's top speed is about 7 m/s).
time
4.8 s

5.3 s

5.8 s
position
< -3.2,7.7, 0 > m

< -1.0,6.4, 0 > m

< 0.7,4.6, 0 > m

(a) between 4.8 s and 5.3 s, what was the bee's average velocity? becareful with signs.
< 4.4correct check mark, -2.6correct check mark, 0 > m/s

(b) between 4.8 s and 5.8 s, what was the bee's average velocity? becareful with signs.
< 3.9correct check mark, -3.1correct check mark, 0 > m/s

(c) of the two average velocities you calculated, which is the bestestimate of the bee's instantaneous velocity at time 4.8 s?
acorrect check mark

(d) using the best information available, what was the displacementof the bee during the time interval from 4.8 s to 4.85 s?
< -2.98wrong check mark, 7.57wrong check mark, 0 > m

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.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?