Recent content by mimi83

Homework Statement A clock is designed with a simple pendulum, consisting of a mass at the end of an aluminum rod, whose period is supposed to be equal to one second. The clock is designed to keep accurate time at 20.0°C, but is operated at a constant temperature of −80.0°C. (a) Will the...

thank your for helping me, but the answers are incorrect. I think the problem is about the height ( h).

Homework Statement The temperature of a block of lead is raised from 0°C to 100°C. What is the percentage change in its density? (The density of lead at 0°C is 11,300 kg/m3.) Homework Equations ΔV = Vi βΔT The Attempt at a Solution it gave the wrong answer when i tried to use the...

Homework Statement An open can is completely filled with water, to a depth of 20.6 cm. A hole is punched in the can at a height of 1.7 cm from the bottom of the can. Bernoulli's equation can be used to derive the following formula for the speed of the water flowing from the hole. In...