A recycling center is melting down gold. It starts out at 18oC and reaches its melting point at 108ᵒC by absorbing 153,000 J of energy. What was the mass of the melted gold? Note: Gold has a specific heat of 136 J/kg/°C. *

Find the vertex(use the completing the square method), findthe x- and y-intercepts, and sketch the graph offunction. y = 2x2 + 4x - 1

Which property of fossils allow scientists to determine the relative rock ages..

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?