Astudent is using a spring scale to test the results of different amounts of push and pull forces on a block of
wood and draws the following diagram in her science journal
15 (a)
42 (b)
what unit should be used to label the measurements at points denoted by letters a and b?
a. meters
b. newtons
c. kilograms
d. liters

Alightning strike consists of charge moving from a cloud to the ground . in one particular case, the electrons in a lightning strike are confined to travel within a radius of 1.5 m and to move at a speed of 5.0 x 10 m/s. if the density of electrons in the strike is 10'15 electrons/m what current is carried by the lightning ?

Suppose that a comet that was seen in 563 a.d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection