if a baceball is dropped from a skysrcaper, what will its speed (Velocity) be after 4.5 seconds (assuming no air resistance)

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 speed of light can be used to measure the

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.