How many centuries would it take for humans originating in Africa to travel to china some 10000 km away? at a rate of 1 km per year.

A two-pulley system allows a dockworker to apply a 1000 N force over a distance of 10 m, while lifting a crate by a vertical distance of 7.5 m.

A 0.150 kg baseball is thrown upward with an initial speed of 20.0 m/s. what is the force on the ball when it reaches half of its maximum height

Early in the history of geology, scientists debated two different views of how geologic processes work. These two ideas became known as uniformitarianism and catastrophism. Which of the following correctly describes the view of catastrophism? A.

The magnetic field lines of a bar magnet spread out from the ... ?

What is the difference between luxury and a necessity

Why are microwaves beneficial to use for transmitting information

A 75 kg runner taking part in a 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of 32 meters. if he completes the 200 m dash in 20.

Thinking about the winter we missed out on this year. Calvin and his tiger go sledding down a snowy hill. There is friction between the snow and the sled, and there is air resistance.

what are the three types of solenoids, which one is the most common, and which one is used in pinball machines?

A sound wave has a frequency of 741 hz in air a wavelength of 0.47m what is the temperature of the air as soon as the below city of sound at 0°C is 235 m/s