It takes Cho 5 seconds to move a sofa 10 meters with a force of 2 N. What is Cho's power output? 50 N-m/sec
4 N-m/sec
5 N-m/sec
10 N-m/sec

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.