Calculate the total work done (J) by a force given by: F = ( 3i -6j) N to move an object a displacement given by: R = ( 8i +
6k) m
O a
- 12
Rb
18 i-48)
C C
C
24i - 36j
O d.
d
+ 24

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

Na food processing facility, a spherical container of inner radius r1 5 40 cm, outer radius r2 5 41 cm, and ther- mal conductivity k 5 1.5 w/m · k is used to store hot water and to keep it at 100°c at all times. to accomplish this, the outer surface of the container is wrapped with a 800-w electric strip heater and then insulated. the temperature of the inner surface of the container is observed to be nearly 120°c at all times. as- suming 10 percent of the heat generated in the heater is lost through the insulation, (a) express the differential equation and the boundary conditions for steady one-dimensional heat conduction through the container, (b) obtain a relation for the variation of temperature in the container material by solving the differential equation, and (c) evaluate the outer surface tempera- ture of the container. also determine how much water at 100°c this tank can supply steadily if the cold water enters at 20°c.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?