A dock worker uses a pulley system to raise a boat onto a dock. The pulley system has a mechanical efficiency of 73 %. The boat has a weight of 950 N. The pulley system lifts the boat 5 m into the air. How many newton-metres of work does the dock worker have to exert to lift the boat?

0.09 moles of sodium sulfate in 12 ml of solution

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?

Aroller coaster is traveling at 13 mi./s when you purchase a hill that is 400 m long and down the hill exonerate at 4.0 m/s squared what is the final velocity of the posterior found your answer to the nearest number