Abiker rides on a straight line such that his displacement from the starting point is given as x = 2t + t2. what is the average velocity (average rate of change of displacement) for between t = 4s and t = 6s?

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?

The mass of the sun is 1.99×1030kg and its distance to the earth is 1.50×1011m. what is the gravitational force of the sun on the earth?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.