A bob of mass m = 0.300 kg is suspended from a fixed point with a massless string of length L = 25.0 cm. You will investigate the motion in which the string traces a conical surface with half-angle theta = 17.0 degrees.

What tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 17.0 degrees with the vertical?

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.

What is part of a line has one endpoint and continues in one direction?