What would the acceleration voltage that we have to apply in the e/m ratio apparatus, when the current in the helmholtz coils is equal to 1 amp, to achieve a radius of 5 cm of the circle of the electron path?
turns per coil, n=132,a=147.5mm

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

If forces acting on an object are unbalanced. true or false

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.