Four people are attempting to move a stage platform across the floor. If they exert the horizontal forces shown, determine (a) the equivalent force-couple system at O and (b) the points on the x- and y-axes through which the line of action of the single resultant force R passes. Assume F₁ = 87 lb, F₂ = 85 lb, F3 = 46 lb, F4 = 55 lb, a = 82 in., b = 64 in., and 0 = 44°. y F.

Distilled water at 10deg C stands in a glass tube of 9.0 mm diameter at a height of 24.00 mm. What is the true static height in mm if the surface tesnsion is 0.0742 N/m.   a.24 mm b.27.4 mm c.20.6 mm d.3.4 mm

I need help solving problem numbers 4--15.

B.How does the color of t-shirt you wear affect its temperature? te three variations of the independent variable below. IF THEN BECAUSE (Write a SPECIFIC action you can do) (Make a prediction about what you are measuring) (Reason why from your knowledge/research)