The rate of motion of the earth at its equator is about 1,038 mi/h because of its rotation. from this information, estimate the earth's circumference using an order-of-magnitude estimate. 2,000 mi 20,000 mi 200,000 mi 2,000,000 mi i just took the test and the answer is 20,000***

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

The energy released by a nuclear fusion reaction is produced when

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 740 n/m. it is initially at rest on an inclined plane that is at an angle of theta= 26 with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is uk = 0.17. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. the block's initial mechanical energy is 9.472 j. b. if the spring pushes the block up the incline, what distance l in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.