8.5. A 2.0kg object is attached to the end of a 5.0m long and of 0.0088cmn cross-sectional area and stretches the wire elastically. The
object undergoes vertical SHM when pulled down a little and released
Find the period of its vibration given that Young's modulus of the
wire is 200 GPa​

When an object is heated it contracts. a. true b. false

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

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.