Alead nucleus is spherical with a radius of about 7 ✕ 10⁻¹⁵ m. the nucleus contains 82 protons (and typically 126 neutrons). because of their motions the protons can be considered on average to be uniformly distributed throughout the nucleus. based on the net flux at the surface of the nucleus, calculate the divergence of the electric field as electric flux per unit volume.

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves