Which of the following is a testable hypothesis?
a) high levels of salt in soil will probably affect plant growth by either making the plants grow better or causing the plants to die.
b) the growth rate of an e. coli bacterial colony will increase as temperature increases from 10 °c to 50 °c.
c) is there a proportional relationship between the number of pimples a person gets and the amount of chocolate he/she eats?
d) hurricanes look larger in images taken by an orbiting satellite than in video footage taken by weather reporters standing on earth's surface.

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

How many times did thomas edison mess up the light bulb

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.