An athlete prepares to throw a 2.0-kilogram discus. his arm is 0.75 meters long. he spins around several times with the discus at the end of his out-stretched arm so that the discus reaches a velocity of 5.0 m/s. what is the centripetal force acting on the discus?

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

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.

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.