The core of a star must be at temperature of degrees celsius for hydrogen fusion to take place. 10,000 100,000 1,000,000 10,000,000 100,000,000

What are segments of dna that code for a particular trait. a combination of dna and proteins make up what

In a system, when potential energy decreases, then entropy also decreases. true false

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants