Speed is
a. a measure of how fast something is moving.
b. always measured in terms of a unit of distance divided by a unit of time.
c. the distance covered per unit time.
d. all of the above. e. none of the above.

Abird sitting high in a tree is an example of what type of wnergy

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?