Plastics are used in millions of objects we use every day. Why are plastics NOT considered natural resources? A. They are recyclable.
B. They are made by people. C. They are bad for the environment.
D. They are made entirely from nonrenewable resources.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

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?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?