The work of johannes kepler is likely to have been most influenced by the
work of which of the following scientists?
o
a. ibn al-haytham
o
o
o
b. christian doppler
c. lord kelvin
d. galileo galilei

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

What properties of a moving object are used in determining the object's energy of motion

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".