What must occur to a shopping cart at rest in order to make it roll forward?

a) a force must be provided to overcome gravity.

b) balanced forces must be acting upon the cart.

c) an unbalanced force applied to the cart pushing or pulling it forward.

d) the unbalanced force acting upon it must be smaller than that of friction.

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Which of the following is a difference between active transport and facilitated diffusion? view available hint(s)which of the following is a difference between active transport and facilitated diffusion? facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.active transport involves transport proteins, and facilitated diffusion does not.facilitated diffusion involves transport proteins, and active transport does not.active transport requires the expenditure of cellular energy, and facilitated diffusion does not.

What is the most appropriate method of gaining weight (muscle mass)