What is the speed of a car if it travels 200 meters in 30 seconds? A hungry whale uses echolocation to find its dinner. Suppose the fish is 505 meters from the whale and the whale receives the echo 0.78 seconds later. a) What was the speed of the sound wave? b) The wavelength of...
The particle's speed is defined as the distance traveled by the particle per unit of time. In other words, it is the ratio of the distance to the time taken to cover the distance as follows: v = st Where: s is the distance traveled by the particle in a time interval...
The speed limit on some interstate highways is roughly 120 km/h. What is this in meters per second? How to convert kph to mph with a formula A car is traveling at a speed of 8 m/s. It accelerates to a speed of 11 m/s in 7 seconds. Calculate the (a) acceleration of the...
Similarly, when an airplane reaches supersonic speeds, it surpasses the speed of sound, currently traveling at approximately 700 mph (1,127 km) in air at sea level. This is when the aircraft "breaks" the sound barrier. Birth of the Sonic Boom As the aircraft maintains supersonic speed, al...
Hard drives have been in a state of constant evolution since the 1950s, yet they've always been vulnerable to damage and data loss. That was until the solid-state drive (or SSD) was invented. So, what is an SSD? An SSD storage device uses semiconductor chips, not magnetic media, to ...
The tape in a cassette-tape deck moves over the head at about 2 inches (about 5.08 cm) per second. A hard-disk platter can spin underneath its head at speeds up to 3,000 inches per second (about 170 mph or 272 kph)! The information on a hard disk is stored in extremely small mag...
The American conversation about high-speed rail has an internal debate that greatly bothers me, about whether investments should be incremental or not. An interview with the author of a new book about the Northeast Corridor reminded me of this; this is n
WindGentle breezes, typically around 8-10 mph (13-16 kph) Hurricane ActivityLow, as it’s outside of hurricane season WavesCalm, ideal for beachgoers and water activities As February unfolds in Miami, you’ll find yourself immersed in a climate that’s as inviting as the city’s vibrant...
The Toyota iQ (top) served as the starting point for the Aston Martin Cygnet. Though designers couldn’t do much about the car’s shape, the Cygnet’s grille is recognizably Aston. While the notion of an “Astonized” Honda Civic might sound sort of appealing, Aston chose to go smaller...
Iliotibial band syndrome (ITBS)— also misleadingly known as iliotibial band friction syndrome— is a common1 repetitive strain injury that causes pain mainly on the side of the knee, especially when descending stairs and hills. It is often maddeningly stubborn. The injury mainly plagues runners,...