Sebuah bintang memiliki luminositas L = 0.4 L M dengan L M adalah luminositas Matahari. Bintang ini saat diamati dengan teleskop di Bumi memiliki densitas flux F = 6.23 × 10 − 14 W m − 2 . Tentukan jarak dari pengamat ke bintang ini (d)! Abaikan gangguan atmosfer dan gunakan luminositas Matahari L M = 3.826 × 10 26 W .

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force

All of the following are typical ways through which to find an apprenticeship except: a. guidance counselor b. trade association c. a vocational school d. job postings

What are the two main ideas of this passage? museum experts feel that museums must change to attract visitors. museum experts care more about the number of visitors than about history. museums that display artworks and exhibits do not make families welcome. museums like colonial williamsburg make learning about the past fun. museums in the united states are different than in other countries.