Why is citric acid added to food? to add color to add tartness to add bitterness to add sweetness

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied

Pls ill give u brainliest which of the following is true about science? 1. political conditions are unable to influence it. 2. economic concerns may prevent it from solving problems.

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species