Suppose that a scientist is going to do an experiment using αparticles from the radioactive source containing one milligram 210Po. This is a very intense source producing 1.65 x 1012 decays/s (=1.65 x 1012 Bq). The αparticles go off in random directions, but only the ones inthe direction of your target may be used for the experiment. Suppose that the target being irradiated is 10 cm from the source. What is the flux, Φ,of αparticles hitting the target?A useful fact is that the area A of a sphere isA=4πr2.

a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards