Aman uses a single movable pulley to lift a heavy load with a frictionless rope.

which of the following pulley systems have/has a greater mechanical advantage than the one shown above?

w.
x.
y.
z.

pulleys at the top of the rope are fixed.
a.
w and z
b.
w and y
c.
w only
d.
w, y, and z

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

Answers are 1,2,4 its correct on edgenuity.

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.