What do you think are the major contributions of science and technology to philippine nation-building? ​

Ifeel kind so i give 20 points does two crest in a slinky considered a wavelength and two trough too?

Flowers are the reproductive organs of plant together with the leaves and stems,they make up the shoot system. how are floers similar to the reproductive organs of animals?

Why is there a 1 sun's mass gap between the mass of a black hole and a pulsar? because when a star collapses with the 2 time's the sun's mass or bellow it will become a pulsar or when a star collapses 4 time's the sun's or above it will become a black hole what will happened when the star collapses at 3 time's sun's mass ?