What is the wind speed of an African swallow?

Answer Some 38 species of swallow inhabit Africa, says A healthy European or barn swallow--common to many parts of Africa--can reach speeds up to 35 miles per hour under ideal weather condi... Read More »

Top Q&A For: What is the wind speed of an African swallow

The Difference Between Velocity & Instantaneous Velocity?

Velocity and instantaneous velocity are terms that are most often used in the physics classroom. Because these two terms don't have the same definition, students who don't know the difference in t... Read More »

How many seconds is a normal shutter speed i have a nikon n80 with adjustable shutter speed and i was wondering what the noraml shutter speed is?

Shutter speed depends upon available light, aperture, the subject, and camera settings. If a picture is being taken in low light with a slow lens (larger aperture number), then the shutter may need... Read More »

Create device for control of fan speed. 4 levels of speed. speed switching in manual mode with two.....?

Too many requirements for a circuit design that can be described here,but may be possible to do with thermal switches and some relays.Start by drawing diagrams of single-pole double-throw switchest... Read More »

What is the velocity of air in still air?

Speed of sound in still air is c ≈ 331 + 0.6 × T. T = Temperature. Speed of sound in air at 20°C is c ≈ 331 + 0.6 × 20 = 343 m/s.