Choose all the true statements about the heating curve: OThe temperature remains constant during segments B and D.
OA phase change occurs from 300-400 seconds.
ODuring segment E, the kinetic energy of the sample is increasing as heat is absorbed.
O The unknown releases heat as it vaporizes from a liquid to a gas.
O The freezing point is at - 10 degrees Celsius.
O The unknown is both solid and liquid during segment C.
O As heat is absorbed, the potential energy of the sample is increasing at segments A, C, and E.
O The potential energy of the sample is increasing at segments B and D.
O During segment D, both a liquid and gas are present.
O The unknown material is boiling during segment D.
O Heat energy is released when the material freezes.
O During segment D, the kinetic energy of the sample is increasing.
O
The condensation point is at 50 degrees Celsius.

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field. it is in the opposite direction from that of the original external field. it has a direction determined entirely by the charge on its surface. it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b. b. at twice the distance, the magnitude of the field is 2b. c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.