It takes 50 N to move a desk 0.4 m high. What is the work done? W=F*d * a) 20 J
b) 125 J
c) 0.008 J
d) 100J

brainliest for the best answer, asap plz
for science lovers

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b. refraction c. diffraction d. interference

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.

What types of radiation make up the electromagnetic spectrum?