Which of the following describes how biodiversity contributes to the sustainability of a natural environment? a. logging allows for the collection of firewood in the mountains of southwest china. b. non-native alligator weed forms dense mats that crowd native species in california. c. mining in the guinean forests of west africa provides diamond and gold jewelry for humans. d. giant kangaroo rats enrich the soil for plants with their piles of grass clippings in the california grasslands.

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?