﻿ A 3173 kg Asian elephant ( Elephas maximus ) pushes against a coconut tree ( Cocos nucifera ), which does not move. Energy is expended by the… - Essay solutions

## A 3173 kg Asian elephant ( Elephas maximus ) pushes against a coconut tree ( Cocos nucifera ), which does not move. Energy is expended by the…

A 3173 kg Asian elephant (Elephas maximusCocos nucifera ) pushes against a coconut tree (), which does not move. Energy is expended by the elephant. Briefly explain if the elephant has done any work, and briefly explain how this is (or is not) consistent with the conservation of energy The left end of a spring is attached to a wall. The right end of the spring is attached to a 80.0 g brick. The spring constant is 117.7 N/m. A pushing force is applied to the brick and the spring compresses 16.1 cm from its resting position. Calculate the spring potential energy (in J).   Rubbing alcohol (isopropyl alcohol) has a density of 786 kg/m3. What is the mass of 545 mL of rubbing alcohol?  To celebrate St Patrick’s Day, a friend makes an “Irish Flag Shot”, which is a drink consisting of three coloured layers: the green liquid on the bottom, then a white liquid, and finally an orange liquid on the top. The classmate challenges you to make a drink consisting of the same three coloured liquids, but with the orange liquid on the bottom.Briefly explain why you should or should not accept this challenge.   A ball sinks in water (density = 1000 kg/m3). The ball has a mass of 55 kg and a diameter of 38.0 cm. Calculate the buoyant force (in N) of the ball.  The Great Barrier Reef is the world’s largest coral reef system. What is the increase in water pressure (in kPa), compared to what it was at the water surface, as a diver descends down to a depth of 12.0 m?ρ = density of sea water = 1030 kg/m3Patm = 101.3 kPag = 9.80 m/s2 .  Science Physics SLE 123

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