The following declassification instructions are no longer valid, and if annotated on the source document, will not be carried over to the derivative document. * X1, X2, X3, X4, X5, X6, X7, X8 * OADR * MR (never was a valid declassification instruction). * Subject to Treaty or International Agreement * DNI or DCI Only (when no imagery is in the document) NOTE: The derivative classifier shall calculate a date that is 25 years from the date of the source document when determining the declassification instruction for the derivative document or electronic file.

a. true
b. false

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

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?