The heating-cooling graph of a 20 gram crystalline mass is shown with temperature on the y axis from 0 to 350 degrees Celsius is shown and heat added on the x axis from 0 to 1400 Joules. Five segments connect points from 0, 0 to 200, 50 to 400, 50 to 600, 200 to 1000, 2000 to 1200, 300. In which phase is the substance when its temperature is 250 degrees Celsius? (5 points)

Group of answer choices

Solid

Liquid

Gas

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

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.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?