The actual size of a gold nucleus is approximately 7 fm. knowing this, calculate the kinetic energy (ke, or kea, however you may choose to label the measurement) that an alpha particle would need to just touch the outside of the nucleus. does this seem like a reasonable number?
hint - the lhc is currently the most powerful particle accelerator on earth, and i? t operates at 13 tev (tev = 1012 ev).

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

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?

Which composition of water moves to begin a deepwater current?