Apitot-static probe is mounted in a 2.1-cm-inner diameter pipe at a location where the local velocity is approximately equal to the average velocity. the oil in the pipe has density ρ = 860 kg/m3 and viscosity μ = 0.0103 kg/m⋅s. the pressure difference is measured to be 95.8 pa. calculate the reynolds number of the flow. is it laminar or turbulent?

The discovery of the electron as a subatomic particle was a result of

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?