Microsoft Clipart Katie, an ice skater, can lift an 80 N
barbell one meter 25 times
in one minute.
And please help!!!

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?