A student with a body mass of 74.0 kilograms climbed several flights of stairs to a final height 7.0 meters from the bottom. A second student, using a stopwatch, determined that the climb was completed in 13.0 seconds. The body mass, time, and vertical height
reached by the student is given in the table. (Estimate g as 10 m/s2)
How many watts of power were generated by the student during the climb?

Study the diagram showing the range of temperature in the earth’s layers. which temperature most likely corresponds to the asthenosphere? 1,613°c 2,521°c 3,628°c 6,217°c

Acar travels 40m in 8 seconds find the car speed

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