Bob is pushing a box across the floor at a constant speed of 1.5 m/s, applying a horizontal force whose magnitude is 50 N. Alice is pushing an identical box across the floor at a constant speed of 3 m/s, applying a horizontal force. (a) What is the magnitude of the force that Alice is applying to the box? F = N

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.

Which one of the following research methods can show cause and effect

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?