A glass worker needs to heat 5.0 kg of glass from room temperature (20 ℃) to 900 ℃. If the specific heat of the glass is 840 Jkg ℃, how much heat must be transferred to the glass?

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

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