Instructions: Answer the questions in the space provided. 1.
Determine the unknown values for time per revolution and rotational speed (in rev/s and
RPM) from the given value.
a.
t(s) = 4s
b.
t(s) =
w (rev/s) =
w (rev/s) = 2 rev/s
W (RPM) =
w (RPM) =
C.
t(s) =
d.
t(s) = 0.125 s
w (rev/s) =
m (rev/s) =
6 (RPM) = 15 RPM
6 (RPM) =

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

Which of these metals are magnetic?

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative