What is main difference between a lake ecosystem and a pond ecosystem?

a. a lake ecosystem has salt water a pond ecosystem does not

b. a pond ecosystem has salt water a lake ecosystem does not

c. a pond ecosystem covers a much larger area than a lake ecosystem

d. a lake ecosystem covers a much larger area than a pond ecosystem

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?

If jason ii needs 15 kw of power at 300 volts to operate, what amperage of current must flow through the cable?