A hot (100°C) bolt with a mass of 71 grams is placed in 150 grams of cool (20°C) water. This diagram shows the resulting temperature changes. The specific heat of water is 4.186 J/g°C. Approximately how many joules of heat does the water absorb?

What is the radius of the circular path ofa charged particle in a magnetic field?

When does your body conduct current more readily?

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.