Block A in (Figure 1) has mass 1.20 kg , and block B has mass 2.90 kg . The blocks are forced together, compressing a spring S between them; then the system is released from rest on a level, frictionless surface. The spring, which has negligible mass, is not fastened to either block and drops to the surface after it has expanded. Block B acquires a speed of 1.45 m/s . What is the final speed of block A? How much potential energy was stored in the compressed spring?

Researchers determine that the biodiversity in a woodland region is declining. they identify two major threats to the region's biodiversity, a method to address each threat, and the expected outcome of each method. this information is shown in the table. a) reforestation would not benefit many species because most forest species live on the ground. b) reforestation would take the longest time to be effective because trees take several years to grow. c) biological augmentation would benefit only a few species because is is typically not very effective. d) biological augmentation would take less time to ve effective because it targets the majority of prey species.

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

If y gets smaller as x gets bigger and y have an relationship?