Can i get some on these two questions
a hiker walks 50 miles 55 degrees south of west. how far did she walk west?
select one:
a. 28.7 miles
b. 40.9 miles
c. 35.4 miles
d. none of the above
a ball has a velocity of 25 m/s at 37 degrees. what is the horizontal component of the velocity?
select one:
a. 15 m/s
b. 18 m/s
c. 20 m/s
d. 25 m/s

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost