4.) Find the energy Eo of an electron in an orbit around a nucleus given that met
Ео
[eo 8.85 x 10-12 fm, h = 6.6 x 10-34J/s,
10-31kg, 1.6 x 10-19C]
m = 9.1 x
10-191​

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.