A football is kicked from the ground with a speed of 30 m/s at an angle of 60º with the ground. What is the horizontal component of the football immediately after it is kicked? a
30 m/s
b
30 tan(60º) m/s
c
30 sin(60º) m/s
d
30 cos(60º) m/s

If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.